Abstract: A composition comprising a low density polyethylene (LDPE) and a peroxide-treated metallocene-catalyzed linear low density polyethylene (pmLLDPE), wherein the composition when extruded as a molten resin displays a neck-in value that is (i) decreased when compared to the neck-in value observed when using the LDPE alone, (ii) about equal to the neck-in value observed when using the LDPE alone, or (iii) increased by <10% of the neck-in value observed when using the LDPE alone. The composition when extruded as a molten resin displays a neck-in value that is decreased by ?5% when compared with a neck-in value of an otherwise similar composition comprising the LDPE and a metallocene-catalyzed linear low density polyethylene (mLLDPE) that has not been peroxide-treated. The composition comprises 1-80 wt. % pmLLDPE. The pmLLDPE has a melt index of ?0.9 g/10 min, when tested in accordance with ASTM D1238 under a force of 2.16 kg.

Abstract: The present disclosure provides a method of measuring a true shear viscosity profile of a molding material in a capillary and a molding system performing the same. The method includes the operations of: determining a setpoint temperature of the molding material before injecting into the capillary; obtaining an initial shear viscosity profile at the setpoint temperature with respect to a shear rate of the molding material; fitting an initial temperature profile with respect to the shear rate according to the initial shear viscosity based on Cross William-Landel-Ferry model; fitting a first shear viscosity profile and a first temperature profile with respect to the shear rate according to the initial temperature profile based on the Cross-WLF model; and setting the first shear viscosity profile as the true shear viscosity profile when a difference between the first temperature profile and the initial temperature profile is not greater than a threshold.

Abstract: A process for epoxidation of an unsaturated polymer involves mixing an unsaturated polymer and a peroxy acid in an absence of solvent to produce an epoxidized polymer. The process may require no solvent, require no catalyst, require no or little applied external heat input, require no applied cooling, require less epoxidation agent, be faster and/or result in more efficient conversion of the unsaturated polymer.

Abstract: A rubber compound for the manufacture of electrostatic dissipative products comprising a rubber component derived from poly(butadiene-co-acrylonitrile), an electrically conductive filler component derived from sulfonic acid doped polyaniline, and an antioxidant, wherein the mixture comprising the rubber component, electrically conductive filler and antioxidant is vulcanized by exposure to electromagnetic radiation, and the vulcanized rubber compound possesses improved conductivity and tensile strength properties. A method for producing the rubber compound above comprising of providing a rubber component derived from poly(butadiene-co-acrylonitrile), an electrically conductive filler component derived from sulfonic acid doped polyaniline, and an antioxidant, then mixing the rubber component, electrically conductive filler and antioxidant together. The mixture is then molded into a suitable shape and then subjected to an electromagnetic radiation to stimulate vulcanization of the rubber mixture.

Abstract: Provided herein is a process for making a grafted cross-linked polymer blend, by polymerizing a first and second polymer solution (each having 75 to 99 wt % propylene-derived units, 1 to 25 wt % ethylene-derived units, and 0.05 to 6 wt % diene-derived units); combining the first and second polymer solution to produce a polymer blend solution; removing solvent from the polymer blend solution to produce a polymer blend; mixing the polymer blend with a coagent and a vinyl-terminated silane compound; subjecting the polymer blend to electron beam irradiation to grafting the vinyl-terminated silane compound to either or both of the first polymer and the second polymer to form a grafted polymer blend; and moisture curing the grafted polymer blend to form a grafted cross-linked polymer blend, wherein the grafted cross-linked polymer blend is substantially free of peroxide.

Abstract: A durable ambient light curable waterproof liquid rubber coating with volatile organic compound (VOC) content of less than 450 grams per liter made from ethylene propylene diene terpolymer (EPDM) in a solvent, a photoinitiator, an additive, pigments, and fillers, and a co-agent and a method for making the formulation, wherein the formulation is devoid of thermally activated accelerators.

Abstract: The present invention relates to methods for making cross-linked oxidation-resistant polymeric materials and preventing or minimizing in vivo elution of antioxidant from the antioxidant-containing polymeric materials. The invention also provides methods of doping polymeric materials with a spatial control of cross-linking and antioxidant distribution, for example, vitamin E (?-Tocopherol), and methods for extraction/elution of antioxidants, for example, vitamin E (?-tocopherol), from surface regions of antioxidant-containing polymeric materials, and materials used therewith also are provided.

Abstract: A process for preparing a pressure sensitive adhesive using a modified planetary roller extruder is described. The process in accordance with one aspect of the invention is a continuous process that includes introducing primary raw materials comprising a non-thermoplastic elastomer into a planetary roller extruder, introducing a heat-activatable crosslinker into the planetary roller extruder for mixing with the primary raw materials, and compounding the primary raw materials and the heat activatable crosslinker to form an adhesive composition while maintaining the temperature of the adhesive composition between about 25° C. and about 100° C. The non-thermoplastic elastomer is masticated during compounding and at least some of the heat-activatable crosslinker remains generally unactivated and is available for later activation.

Abstract: A polymer and composition useful in forming an insulating film provided with a low permittivity, a high heat resistance, and a high mechanical strength and an insulating film obtained from these and an electronic device having the same are provided. The polymer for forming an insulating film according to the present invention is characterized by being obtained by polymerizing a reactive compound represented by Formula (1). The insulating film according to the present invention is formed using a composition for forming an insulating film including that polymer, has molecular spaces having an average space size of 0.7 nm to 5 nm, and has a permittivity of 2.3 or less. The electronic device according to the present invention has the insulating film.

Abstract: An organic insulating material includes a prepolymer of a cage structure compound having a polymerizable unsaturated bond-containing group and a cage structure with an adamantane structure as the minimal unit. The prepolymer has a number-average molecular weight of between 2,000 and 500,000 based on polystyrene and measured by gel permeation chromatography. The prepolymer includes unsaturated bonds produced by reaction between the polymerizable unsaturated bonds and the unreacted polymerizable unsaturated bonds. The prepolymer has a residue rate of unreacted polymerizable unsaturated bonds of between 20% and 80%.

Abstract: The present invention relates to a composite powder, preparation and use thereof. The composite powder according to the present invention is prepared by intimately mixing an irradiated or non-irradiated rubber latex with a slurry of inorganic particles in a ratio corresponding to that of rubber particles to inorganic particles in the composite powder according to the present invention, and then drying the resultant mixture. The composite powder according to the present invention comprises agglomerates composed of powdery rubber particles and inorganic particles, with inorganic particles being uniformly distributed either inside the agglomerats or both inside the agglomerates and on the surfaces thereof. The composite powder according to the present invention can be easily dispersed in plastic matrixes and thus can be compounded with plastics to produce toughened plastics and thermoplastic elastomers.

Abstract: The invention relates to use of a diacetylene compound as a color former wherein the diacetylene compound has one of general formulae (I) to (V). The invention also includes methods of imparting color to a material including a compound as defined above, which comprises subjecting the material to irradiation.

Abstract: The invention relates to a process for the production of an article, wherein—ethylene is polymerized with a polyene and optionally another comonomer, resulting in a polymer with a MFI (21.6) between 0.05 dg/min and 100 dg/min,—melt processing the polymer into an article,—optionally crosslinking the polymer during or after melt processing the polymer and—optionally sterilizing the polymer article by high energy irradiation.

Abstract: The present subject matter relates generally to polymer compositions, and more particularly to irradiated polymer compositions comprising at least one non-phenolic stabilizer. The present polymer compositions comprise an unexpected balance of properties after being subjected to irradiation treatments, including an unexpected combination of a lower melt flow rate ratio (MFRr) and high melt tension after being irradiated, while minimizing negative yellowing effects.

Abstract: A method for producing a graft polymer comprises the steps of: a) irradiating a base polymer with an electron beam or a source of ?-radiation, b) contacting a grafting solution with the base polymer, wherein the grafting solution contains at least one oxygen scavenger and at least one graft monomer selected from the group consisting of styrene and styrene derivatives, and c) graft polymerizing the mixture of the base polymer and the grafting solution obtained in step b).

Abstract: The present invention provides novel hybrid polymer useful for alignment layers for inducing alignment of a liquid crystal medium. Hybrid polymers of this invention are prepared from a) at least one component selected from the group consisting of oligomer(s) and polymer(s) within the class of polyimides, poly(amic acids) and esters thereof wherein the at least one component comprises at least one initiator generating moiety, and b) at least one component selected from the group consisting of addition monomer(s) and addition polymer(s), wherein the two components are covalently bonded to form a copolymer. The invention further describes liquid crystal elements such as all liquid crystal display products or modes, liquid crystal devices and liquid crystal optical films comprising the novel hybrid polymer alignment layers.

Abstract: An object of the present invention is to provide a method for producing a block copolymer solid in which microphase-separated structures are formed with good productivity. The present invention provides a method for producing a block copolymer solid in which a microphase-separated structure is formed, or an alloy, blend or composite solid containing a block copolymer in which a microphase-separated structure is formed, which comprises the following steps (1) to (3): (1) immersing a block copolymer solid or an alloy, blend or composite solid containing a block copolymer in a solvent in which each component is insoluble; (2) putting the solid obtained in (1) above in a pressure-resistant container; and (3) irradiating the solid or the solvent in (2) above with microwave.

Abstract: The present invention relates to methods for making cross-linked oxidation-resistant polymeric materials and preventing or minimizing in vivo elution of antioxidant from the antioxidant-containing polymeric materials. The invention also provides methods of doping polymeric materials with a spatial control of cross-linking and antioxidant distribution, for example, vitamin E (?-Tocopherol), and methods for extraction/elution of antioxidants, for example, vitamin E (?-tocopherol), from surface regions of antioxidant-containing polymeric materials, and materials used therewith also are provided.

Abstract: An object of the present invention is to provide a method for producing a block copolymer solid in which microphase-separated structures are formed with good productivity. The present invention provides a method for producing a block copolymer solid in which a microphase-separated structure is formed, or an alloy, blend or composite solid containing a block copolymer in which a microphase-separated structure is formed, which comprises the following steps (1) to (3): (1) immersing a block copolymer solid or an alloy, blend or composite solid containing a block copolymer in a solvent in which each component is insoluble; (2) putting the solid obtained in (1) above in a pressure-resistant container; and (3) irradiating the solid or the solvent in (2) above with microwave.

Abstract: Crosslinked polyolefin blends, methods for their production, and articles made of the same are provided. In at least one specific embodiment, the polyolefin blends comprise a first polymer formed in a first reactor and a second polymer formed in a second reactor. The first and second polymers, as well as the resulting blend, may comprise units derived from propylene, ethylene, and a diene. The blended composition can then be compounded with one or more coagents, antioxidants, and/or other additives and crosslinked, preferably by exposure to energetic photons. The crosslinked polymers are particularly useful for making fibers, films, and nonwovens.

Abstract: An insulating film formed by a method comprising: coating a film-forming composition containing a compound having a cage structure; and drying the coated composition, wherein the coated composition is irradiated with a light having a wavelength of 200 nm or less in at least one of during the drying and after the drying; a process for producing the same; and an electronic device having the same.

Abstract: Farnesene interpolymer comprises units derived from a farnesene (e.g., ?-farnesene or ?-farnesene) and units derived from at least one vinyl monomer. The farnesene interpolymer can be prepared by copolymerizing the farnesene and at least one vinyl monomer in the presence of a catalyst. In some embodiments, the farnesene is prepared from a sugar by using a microorganism. In other embodiments, the at least one vinyl monomer is ethylene, an ?-olefin, or a substituted or unsubstituted vinyl halide, vinyl ether, acrylonitrile, acrylic ester, methacrylic ester, acrylamide or methacrylamide, or a combination thereof.

Abstract: A pressure sensitive adhesive is obtained by polymerizing a mixture containing: (1) 100 mass parts of (meth)acrylic monomer comprising 98-50 mass parts of a first monomer selected from an aliphatic (meth)alkyl acrylate having a carbon number of 4-6 and an aliphatic (meth)alkyl acrylate having a carbon number of 7-12, wherein the glass transition temperature of a homo-polymer thereof is ?25 degrees C. or less; and 2-50 mass parts of a second monomer comprising one or more selected from the group consisting of: an amide group-containing ethylenic unsaturated copolymerizing monomer, a carboxylic group-containing ethylenic unsaturated copolymerizing monomer, an amino group-containing ethylenic unsaturated copolymerizing monomer, a non-tertial alkyl(meth)acrylate wherein the glass transition temperature of a homo-polymer thereof is ?25 degrees C.

Abstract: A process for preparing a pressure sensitive adhesive using a modified planetary roller extruder is described. The process in accordance with one aspect of the invention includes introducing primary raw materials including a non-thermoplastic elastomer into a feeding section of the modified planetary roller extruder, conveying the raw materials from the feeding section to a compounding section of the modified planetary roller extruder, continuously mixing the primary raw materials in the compounding section to produce a homogeneous adhesive composition. The adhesive composition may be applied to a web-form material. The compounding section of the modified planetary roller extruder includes a main spindle surrounded by and intermeshed with a plurality of planetary spindles at least one of which is a double transversal mixing spindle having a plurality of back-cut helical flights.

Abstract: The invention relates to use of a diacetylene compound as a colour former wherein the diacetylene compound has one of general formulae (I) to (V). The invention also includes methods of imparting colour to a material including a compound as defined above, which comprises subjecting the material to irradiation.

Abstract: The present subject matter relates to processes for irradiating visbroken propylene polymer compositions or extrudates of propylene polymer compositions containing a propylene polymer having a low polydispersity index and a non-phenolic stabilizer.

Abstract: Methods for making a crosslinked elastomeric composition and articles made of the same are provided. In at least one specific embodiment, an elastomeric composition comprising at least one propylene-based polymer is blended with at least one component selected from the group consisting of multifunctional acrylates, multifunctional methacrylates, functionalized polybutadiene resins, functionalized cyanurate, and allyl isocyanurate; and blended with at least one component selected from the group consisting of hindered phenols, phosphites, and hindered amines. The propylene-based polymer can include propylene derived units and one or more dienes, and have a triad tacticity of from 50% to 99% and a heat of fusion of less than 80 J/g. The blended composition can then be extruded and crosslinked. The extruded polymer can be crosslinked using electron beam radiation having an e-beam dose of about 100 KGy or less. The crosslinked polymers are particularly useful for making fibers and films.

Abstract: The present invention pertains to crosslinkable and crosslinked polyisobutylene-based polymers, to compositions that contain such polymers, and to medical devices that are formed using such polymers. According to one aspect, the present invention pertains to crosslinkable and crosslinked compositions that comprise a copolymer that comprises a polyisobutylene segment and two or more reactive groups. According to another aspect, the present invention pertains to medical devices that contain such compositions. According to another aspect, the present invention pertains to methods of making medical devices using such compositions.

Abstract: The invention relates to a process for the production of an ultra-high molecular weight polyethylene ((U)HMWPE) article comprising: —copolymerizing ethylene with a linear, branched or cyclic polyene having 3 to 100 carbon atoms, resulting in a copolymer of ethylene and polyene ((U)HMWPE-P), using such a content of polyene that the number of polyene branches in (U)HMWPE-P is 0.01 to 15 on the average per 1000 carbon atoms; —cross-link the (U)HMWPE-P during or after molding the (U)HMWPE-P.

Abstract: A process for producing a microparticulate hardening catalyst, comprising the steps of jetting a liquid composition containing epoxy resin hardening catalyst (A), monomer having an ethylenically unsaturated group (B) and photopolymerization initiator (C) through a minute nozzle into a gas so as to form microparticles; and while the microparticles are floating, irradiating the same with high-energy rays to thereby effect polymerization of the monomer having an ethylenically unsaturated group (B).

Abstract: An energy ray-curable resin composition comprising (A) a (meth)acrylate having a molecular weight of from 500 to 5,000, of which the main chain backbone is at least one member selected from the group consisting of a polybutadiene, a polyisoprene and hydrogenated products thereof and which has at least one (meth)acryloyl group at an end of the main chain backbone or in a side chain, (B) a monofunctional (meth)acrylate having a C2-8 unsaturated hydrocarbon group via an ester bond, (C) a hydroxyl group-containing (meth)acrylate, (D) a polyfunctional (meth)acrylate, (E) a photopolymerization initiator, and (F) an antioxidant which exhibits equally high adhesive strength to various objects to be bonded, has good heat and moisture resistance, excellent rigidity, low cure shrinkage and little adhesion strain is provided.

Abstract: Polymer/carbon nanotube composites including single-wall or multi-wall carbon nanotubes incorporated into the matrix of a polymer are provided. These composites can be used in environments exposed to galactic cosmic radiation. Accordingly, the composites are useful in deep space applications like space vehicles, space stations, personal equipment as well as applications in the biomedical arts and atom splitting research. The composites can be modified with organic dyes containing at least one phenyl ring and the resulting doped composite is useful as a radiation detector. The preferred polymer is poly(4-methyl-1-pentene). At low nanotube concentrations (i.e., about 0.5 wt % or less), the composites exhibit transparent optical qualities. At higher nanotube concentrations (i.e., about 0.6 wt % or more), the composites are non-transparent.

Abstract: A radiation-curable adhesive/sealant composition comprises a radiation-curable rubber resin, one or more photoinitiators or photosensitizers, and optionally, one or more inorganic or organic fillers.

Abstract: Polyolefin waxes bearing (meth)acrylate groups, process for preparing them and their use.

Abstract: The invention provides a photocurable liquid rubber composition containing a liquid styrene-butadiene copolymer having, at each end of a molecular chain thereof, a functional group having a photocurable unsaturated hydrocarbon group, a (meth)acryloyl group-containing monomer, and a photopolymerization initiator. The composition can be used without solvent, which realizes easy control of the viscosity thereof, and which exhibits high break strength after curing.

Abstract: The present invention provides novel hybrid polymer useful for alignment layers for inducing alignment of a liquid crystal medium. Hybrid polymers of this invention are prepared from at least one component selected from the group consisting of monomer, oligomer and polymer within the class of polyimides, poly(amic acids) and esters thereof and at least one component selected from the group consisting of addition monomer and functionalized addition polymer wherein the two components are covalently bonded to form a copolymer. The invention further describes liquid crystal optical elements such as all liquid crystal display products or modes, liquid crystal devices and liquid crystal optical films comprising the novel hybrid polymer alignment layers.

Abstract: A porous article which is formed from a polymeric material, in which characteristics of the surface of the article provided by the polymeric material are modified by having grafted to it chains of polymerized vinyl monomer units, in which the chains each comprise a number of units of a first vinyl monomer and include a unit of a second vinyl monomer which is different from the first vinyl monomer. Preferably, the ratio of the number of units of the first vinyl monomer in each chain to the number of units of the second vinyl monomer is not more than about 60. When the number of second vinyl monomer units in each chain is one, the mean number of first vinyl monomer units in each chain will be not more than 60.

Abstract: A resin molded article which is a molded article obtained by irradiating a resin molded article containing 100 to 60 parts by weight of (A) syndiotactic 1,2-polybutadiene having a crystallinity of 5% or more and 0 to 40 parts by weight of (B) another thermoplastic polymer with an electron beam, in which the 50% stress of the molded article after the electron beam irradiation (50% M:M2) is from 1.01 to 2.5 times the 50% stress before the electron beam irradiation (50% M:M1), and the molded article has steam sterilization resistance. The molded article is excellent in flexibility and hardness, excellent in steam sterilization resistance, and useful for medical applications such as an infusion tube, an infusion solution container, a catheter and the like.

Abstract: An article suitable for use as an insulating or coating material comprises a radiation-crosslinked composition comprising a polyethylene, a polypropylene and optionally an ethylene-propylene elastomer. The polyethylene component is selected from high density polyethylene (HDPE), medium density polyethylene (MDPE) and linear medium density polyethylene (LMDPE) and the polypropylene component is either a homopolymer or copolymer. The composition is predominantly based on the polyethylene component and contains the polyethylene component in an amount of at least 50 percent by weight. The article is radiation-crosslinked to a sufficient degree that it possesses thermoset properties, such that when the article is heated to a temperature above the crystalline melting point of the polypropylene homopolymer or copolymer, it is softened but does not become liquid.

Abstract: Fluoropolymers are made by admixing tetrafluoroethylene, hexfluoropropylene, and vinylidene fluoride; reacting the reaction admixture to generate a set of fluoropolymeric oligomers; irradiating the fluoropolymeric oligomeric precursor admixture (preferably with electron beam radiation) to form free radical sites on individual fluoropolymeric oligomers of the set and generate thereby a set of free radical oligomer derivatives in the fluoropolymeric oligomeric precursor admixture; and reacting the fluoropolymeric oligomeric precursor admixture to derive the fluoropolymer compound from the free radical oligomer derivatives. In a second approach, fluoropolymers are made by admixing tetrafluoroethylene, hexfluoropropylene, and vinylidene fluoride and irradiating the admixture.

Abstract: An adhesive encapsulating composition and an encapsulating film, which are useful as an encapsulant for an organic electroluminescence device or other electronic devices is provided. The adhesive encapsulating composition includes a hydrogenated cyclic olefin-based polymer and a polyisobutylene resin having a weight average molecular weight of 500,000 or more. Some embodiments of the adhesive encapsulating•composition include a hydrogenated cyclic olefin-based polymer, a polyisobutylene resin having a weight average molecular weight of 500,000 or more, a photocurable resin, and a photopolymerization initiator.

Abstract: A polypropylene resin composition comprising (A) 99.8 to 80 weight parts of a polypropylene resin having a melt flow rate of 0.1 to 50 g/10 min and (B) 0.2 to 20 weight parts of an olefin copolymer rubber having an intrinsic viscosity [?] of 0.5 to 4.0 dl/g and/or a polyethylene resin having a density of 0.895 to 0.945 g/cc and a melt flow rate of 0.05 to 15 g/10 min, which have undergone an ionization ray-irradiation treatment and/or a treatment of adding 0.05 to 5 weight parts of an organic peroxide to 100 weight parts of the aforesaid polypropylene resin composition comprising (A) and (B) and then melting.

Abstract: An article suitable for use as an insulating or coating material comprises a radiation-crosslinked composition comprising a polyethylene, a polypropylene and optionally an ethylene-propylene elastomer. The polyethylene component is selected from high density polyethylene (HDPE), medium density polyethylene (MDPE) and linear medium density polyethylene (LMDPE) and the polypropylene component is either a homopolymer or copolymer. The composition is predominantly based on the polyethylene component and contains the polyethylene component in an amount of at least 50 percent by weight. The article is radiation-crosslinked to a sufficient degree that it possesses thermoset properties, such that when the article is heated to a temperature above the crystalline melting point of the polypropylene homopolymer or copolymer, it is softened but does not become liquid.

Abstract: The present invention discloses an anisotropic conductive adhesive comprising an insulating adhesive component and a number of conductive particles dispersed in the insulating adhesive component, wherein the insulating adhesive component contains a crosslinked rubber resin. The anisotropic conductive adhesive of the present invention prevents exfoliation of an adhesive or reduction in adhesive strength of circuit by minimizing its the heat-contraction occurring in the process of a polymerization or a hardening reaction when connecting micro-circuits, whereby a short circuit between adjacent electrodes can be prevented when connecting the circuits, and excellent connection reliability according to a long-term use is achieved.

Abstract: A process for the preparation of a hydroperoxide functionalized rubber compound by the conversion of triplet state oxygen to singlet state oxygen in the presence of oxygen and a light-induced photoreductant. A dispersion of an unsaturated rubber component in a carrier solvent is introduced into a reactor containing a permeable catalyst bed comprising a light-induced photoreductant component supported on a particulate substrate component and passed through the catalyst bed. A gaseous oxidizing agent is passed through the catalyst bed in contact with the rubber-containing dispersion. The catalyst bed is irradiated with electromagnetic light radiation in the ultraviolet or visible light range at an intensity sufficient to convert triplet oxygen in the oxygenated rubber component to singlet oxygen. The oxygenated rubber component is then recovered from the reactor.

Abstract: Modified polyolefins are produced by reacting a functionalized polyolefin with one or more ethylenically unsaturated compounds having a functional group reactive with the functional group on the polyolefin. These modified polyolefins may then polymerize in the presence of a photoinitiator upon exposure to ultraviolet radiation and also have the capability of copolymerizing in the presence of a photoinitiator with other ethylenically unsaturated crosslinking agents upon exposure to ultraviolet radiation. These modified polyolefins may also contain pendant carboxyl groups, which have the propensity to form hydrophilic salts with amines, and therefore may be rendered water-dispersible. The modified polyolefins of the present invention significantly improve the adhesion of paints, inks, and adhesives to various plastic and metal substrates.

Abstract: A 1,4-di-substituted diacetylene polymer that is soluble in organic solvent, is composed of a repeating unit represented by the general formula ?CR—C?C—CR?? (wherein, R and R? represent identical or different monovalent organic substituents), and has an average degree of polymerization of 4 to 200 and a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight corresponding to said average degree of polymerization (Mn) of 1.1 to 5.0, and a process for producing the 1,4-di-substituted diacetylene polymer by irradiating a solution of the soluble 1,4-di-substituted diacetylene polymer with laser light having a wavelength within the range of 250 to 1,200 nm, and preferably 550 to 900 nm, to cause a photodegradation reaction of said polymer, or heating a solution of the soluble 1,4-di-substituted diacetylene polymer to a temperature of 100 to 300° C.

Abstract: An adhesive composition of the present invention comprises (A) a conjugated diene polymer having a weight-average molecular weight of 500 to 100,000 and (B) an electron pair-donating basic compound; or comprises (A) a conjugated diene polymer having a weight-average molecular weight of 500 to 100,000, (C) a compound having in its molecule three or more functional groups selected from the group consisting of acryloyloxy group, methacryloyloxy group and groups represented by the following formula I: wherein R1, R2 and m are the same as defined in the specification, and (D) a compound having in its molecule one or two functional groups selected from the group consisting of acryloyloxy group and methacryloyloxy group. At least a part of the surface of an adherend is coated with the adhesive composition to form an adhesive layer.

Abstract: A method of modifying a polymeric material whereby the polymeric material is modified to give a highly durable surface without decreasing its strength. Namely, a polymeric material is modified by the method comprising a combination of an impregnation step, an activation step, a step of grafting a monomer and a step of a treatment with a hydrophilic polymer. Thus, the hydrophilic nature, adhesiveness, and so forth of polymeric materials such as polyolefins can be improved without causing any decrease in the practical strength. The thus obtained polymeric materials are usable in articles with a need for high water absorptivity and high adhesiveness, for example, water-absorbing materials and water-retaining materials for medical, sanitary, cosmetic articles or supplies, agricultural materials, synthetic papers, filters and fiber products for clothes, for improving adhesiveness of composite materials and the like.

Abstract: Disclosed are photo or electron beam polymerizable compositions, and preparation thereof and devices containing them. The composition contains completely or substantially completely hydrogenated hydrocarbon-based material completely free or substantially free of carbon-carbon double and triple bonds containing photo or electron beam curable terminal or pendant groups, low-outgassing photoinitiators, an optional viscosity adjustment component and an optional filler. The composition is visible light, UV or electron beam curable. It cures into a low-modulus, low outgassing polymer material. The composition can be used as an adhesive, sealant or lens potting material. It is ideal for use in lithographic tools involving deep or vacuum ultraviolet radiations, in particular, as lens potting materials for 157 nm lithographic tools.