Abstract: A thermosetting printing ink composition comprising a functional copolymer of a thermosettable polyester and a polysiloxane, a pigment, a crosslinking agent and a curing catalyst which may be a strong acid or a metal salt thereof. The composition desirably also includes a reactive diluent such as a glycol, glycol ether or alcohol. The compositions are especially useful for imprinting metal containers such as beer and soda cans.

Abstract: A two-part RTV silicone preapplied compression gasket material for forming compression gaskets in place. The formulation includes a silanol terminated polyorganosiloxane, at least 5% by weight of the formulation of a tri- or tetra- methoxy or enoxy functional silane crosslinker, water, and, a condensation catalyst selected from the group consisting of stannous carboxylate compounds, dimethyl tin (IV) compounds and mixtures thereof. One of the two parts of the formulation includes the water component and the other of said two parts is a dry part and includes the crosslinker component.The formulation provides fast cure, fast development of compression set resistance and excellent ultimate compression set resistance.

Abstract: A method of making a polydimethylsiloxane which has both low reactivity endgroups of the formula(R"O)R.sub.2 SiO--where R" is an alkyl group of 1 to 4 carbon atoms, and high reactivity endgroups of the formula ##STR1## in which a polydimethylsiloxane having the high reactivity endgroups is mixed with a hydroxyl terminated polydimethylsiloxane and then a difunctional silane, R.sub.2 SiX.sub.2 where R is methyl or vinyl and X is N-methylacetamido. These polydimethylsiloxanes are useful for making sealants with reduced modulus.

Abstract: This invention provides polymerizable silica sols in which at least one monomer containing double bond is used as its dispersion medium, especially a silica sol in which the monomer containing double bond is a monomer containing double bond and OH group or is a monomer having an adamantane structure. This invention also provides compositions which comprise these silica sols as composing elements, cured resins that are obtained by polymerizing these silica sols alone or together with other copolymerizable components, and new adamantane derivatives for use in these silica sols.

Abstract: An adhesive composition comprising an acrylate monomer and/or a methacrylate monomer, an organic peroxide and a reducing agent, which contains zeolite or calcium oxide.

Abstract: A moisture curable, one-part sealant composition comprising a silicone-urethane copolymer is provided. The copolymer is prepared via reaction of an alpha, omega hydroxy terminated siloxane having a molecular weight of 5,000 or less with a polyisocyanate. The copolymer has a free NCO content of greater than about 1 wt. % available for moisture cure upon usage.

Abstract: Disclosed is a composite composition obtained by polymerizing a radical-polymerizable vinyl compound (a) in the presence of a silicic acid oligomer (b) and, if desired, colloidal silica (c). This composite composition has high transparency, thermal resistance, rigidity and toughness and is hence useful in applications where inorganic glass has heretofore been used.

Abstract: A coating composition that can be applied to optical plastic moldings having a high refractive index, to protect them from deterioration by light without any adverse effect on their optical functions. The coating composition contains the following essential constituents.(A) 1 part of a hydrolyzate of a silane compound;(B) 0.2-5 parts of titanium oxide-based composite fine particles having a particle diameter of 1-100 nm in which titanium oxide integrally combines with iron oxide, with the ratio of iron oxide to titanium oxide being 0.005-0.15 by weight;(C) 0.02-0.5 part of an unsaturated or saturated polycarboxylic acid or an anhydride thereof; and(D) 0.01-0.2 part of a heat-curing catalyst.

Abstract: A shelf stable aqueous silicone emulsion which yields an elastomer upon removal of the water is produced by combining a reactive polydiorganosiloxane present as an cationic or nonionic emulsion of dispersed particles in water, an acyloxysilane crosslinker, and a tin catalyst, the tin catalyst being in the form of a divalent tin atom combined with organic radicals. The emulsion can be reinforced with colloidal silica without effecting the shelf life of the reinforced emulsion.

Abstract: A silicone rubber composition comprising (A) an alkenyl-containing organopolysiloxane, (B) a polycyclic aromatic compound having at least two phenyl groups, and (C) finely divided silica is easy to process and cures to silicone rubber having low hardness while retaining good physical properties.

Abstract: Disclosed are flame retardant organosilicon compositions, wherein the organosilicon compositions comprise residues derived from (a) polycyclic polyene compounds and (b) residues derived from cyclic polysiloxanes, tetrahedral siloxysilanes and linear poly(organohydrosiloxane)s. Preferably the compositions contain flame retardants, such as a phosphorus containing or halogen containing flame retardant, which may be microencapsulated. Also disclosed are processes for making such compositions and articles made from such compositions.

Abstract: A solvent-free, cold-setting ternary organosiloxane composition is disclosed, which contains (A) liquid organopolysiloxane, (B) a cross-linking agent, and (C) a curing catalyst, said organopolysiloxane (A) being constituted by organosilicon group of X--Si (wherein X represents a hydrogen atom or a monovalent hydrocarbyl group) and functional side chain of OR (wherein R represents a hydrogen atom, a C.sub.1 -C.sub.5 alkyl group or an acyl group), said cross-linking agent (B) being one or more organometallic compounds selected from the group consisting of an organoaluminum compound, an organoboron compound, an organosilicon compound, an organotitanium compound and an organozirconium compound having at least one functional group selected from among an alkoxy group, an acyloxy group and an oxime group, and said curing catalyst (C) being a metal-containing organic compound, with the total contents of the metal elements of the ternary composition being 40% by weight or more in terms of MO.sub.

Abstract: Cyclopentadienyl and/or cyclopentadienylene and/or dicyclopentadienylene-substituted polyorganosiloxanes that are crosslinkable into elastomeric state on exposure to atmospheric oxygen and/or to moisture are well suited, e.g., for adhesive applications in the construction industry and for diverse insulating/coating applications.

Abstract: A friable sealing compound of a polyol component containing polyfunctional isocyanates, the polyol component being a mixture of ricinene oil and a predominantly hydroxyl-terminated polybutadiene having an average molecular weight of 1,500 to 4,500 and/or a ring opening product of an epoxidized vegetable oil with unsaturated or saturated short-chain linear or branched C.sub.6-22 fatty acids.

Abstract: There is disclosed a composite of 1) a polymer containing repeating units derived from a vinyl carboxylic ester having at least one organo terminated poly(alkylene oxide) side chain with the proviso that the poly(alkylene oxide) is present in an amount greater than 35 mole percent of the total of all backbone monomer units and alkylene oxide units in the polymer and 2) a metal oxide wherein the metal oxide comprises between about 1 and about 60 percent by weight of the composite. The composites can be made by a process comprising the steps of:combining the described polymer and a metal oxide precursor in a solvent solution;casting or coating the resulting solution onto a substrate;curing the resulting sample to form acomposite of the polymer and the metal oxide. Optionally, the composite can be removed from the substrate to form a transparent free standing film. These composites have a variety of desirable properties.

Abstract: Crosslinkable carbosilane polymer formulations are prepared from saturated or unsaturated carbosilane polymers containing reactive silicon hydride radicals in the polymer chain combined with polycyclic polyene crosslinkers having two or more double bonds that are reactive in the hydrosilation crosslinking reaction.

Abstract: Heat-vulcanizable silicone elastomer compositions, well adopted for conversion into mechanically strong flame-retardant protective sheathings/coatings for, e.g., electrical wires and cables, comprise (a) at least one polydiorganosiloxane polymer, (b) a reinforcing filler material and (c) a vulcanizing agent, e.g., an organic peroxide, therefor, and including a fireproofing and mechanical strength-enhancing amount of (d) mica and (e) zinc oxide.

Abstract: Particles of abrasives such as Garnet, Staurolite or Wollastonite bound to polymer are used as propellant particles to remove undesired materials from surfaces such as floors, walls, ceilings, machinery etc. For example, soil, paint, oil, grease etc. can be thereby removed.

Abstract: The present invention is characterized by adding and mixing an organosilicon compound having alkoxy, groups and an ester linkage in the molecule represented by the following formula: ##STR1## in an amount of 1 to 20 parts by weight per 100 parts by weight of a trifluoropropylalkylpolysiloxane. Said organosilicon compound has a function as a storage stabilizer as well as a curing agent and, according to the present invention, an RTV fluorosilicone composition that has hitherto been difficult to be applied as an adhesive for electric and electronic parts has been made possible to be used in the particular field.

Abstract: There are disclosed dibenzofuran amorphous polymer comprising a recurring unit represented by following formula (II) and having a molecular weight giving a reduced viscosity of at least 0.2 dl/g as measured in the form of a 0.5% (W/V) solution in N-methyl-pyrrolidone at 25.degree. C., a process for producing said amorphous polymer, a dibenzofuran copolymer comprising, in addition to a recurring unit represented by following formula (II), at least one type of recurring unit represented by following general formula (III) in a specific proportion and having a molecular weight giving a reduced viscosity of at least 0.2 dl/g as measured in the form of a 0.5% (W/V) solution in concentrated sulfuric acid at 25.degree. C., and a process for producing said copolymer. ##STR1## wherein A is --O--, --CO--, --S--, --SO.sub.2 --, a divalent alkylene group or a single bond and n is a number of 0, 1 or 2.

Abstract: A process for making filled molding powders by preparing a dilute solution of a polymer, making a slurry of a filler in the polymer solution, and then causing the polymer to come out of solution, e.g. by adding a nonsolvent or by solvent evaporation, so that the polymer coats the filler particles.

Abstract: A thermoplastic polymer composition comprising a thermotropic polymer and 0.025 to 5% by weight of the composition of a finely dispersed particulate inorganic additive wherein the additive is a material having at least 95% by weight of particles with at least one dimension less than 1 micron and preferably less than 0.1 micron and is an organophilic or organophobic material which has a settling volume of at least 10 when measured in a liquid in which the particulate material is compatible. The presence of the inorganic additive in the thermotropic polymer gives rise to an improved processing behavior.

Abstract: A process for (co)polymerizing alpha-olefins in the gas phase in a fluidized bed or mechanically stirred bed reactor using a Ziegler-Natta type catalyst or a heat activated chromium oxide/refractory oxide catalyst wherein the (co)polymerization is carried out in the presence of 0.005 to 0.2 weight %, based on the weight of the (co)polymer bed, of an inert pulverulent inorganic substance (e.g. silica) having a mean particle diameter between 0.5 and 20 microns. The process is capable of being operated at temperatures closer to the softening point of the produced polyolefin than in the absence of the pulverulent solid.

Abstract: A silicone rubber composition that will be cured using as catalyst a platinum family metal and an organic peroxide, comprising as its constituent component an organosilizane compound represented by the following general formula:(R.sup.2).sub.3 SiNH(R.sup.3 R.sup.4 SiO).sub.n R.sup.3 R.sup.4 SiNHSi(R.sup.2).sub.3wherein R.sup.2 represents a substituted or unsubstituted monovalent hydrocarbon group, R.sup.3 and R.sup.4, which may be the same or different, each represent a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group, and n is an integer of 2 to 20. Even if a large amount of a silica filler is blended in this silicone rubber composition, the silicone rubber composition is excellent in that it has suitable plasticity and is low in crepe hardening and good in workability such as rollability and extrudability.

Abstract: A polyurethane filleting composition which has production of electronic assemblies. The filleting composition is a self-curing polyurethane mixture which has a low dielectric constant, good thermal conductivity, and relatively long working life. The composition is a four part mixture containing:(a) a diisocyanate having the formulaOCN--[CH.sub.2 ]n--NCOwhere n=1 to 6;(b) a polyol having the formula ##STR1## where m=1 to 10; (c) a filler/curing promoter additive; and(d) a viscosity control additive.

Abstract: The present invention relates to silicone elastomers based on platinum-catalyzed, hot-curing organopolysiloxane compositions which are characterized by particularly low compression set after crosslinking and to a process for the production of these elastomers.

Abstract: An electrically insulating paint composition which is curable at low temperatures from about 60.degree. C. to about 100.degree. C., which comprises (A) an alkenyl group-containing, silanol group-free organopolysiloxane which is a copolymer of three kinds of siloxane units represented by the same general formula (R.sup.1).sub.a SiO.sub.(4-a)/2, wherein R.sup.1 represents an unsubstituted or substituted monovalent hydrocarbon residue, and a's in three different units represent 0, 1 and 3 respectively, said copolymer containing at least two alkenyl groups in a molecule; (B) an organopolyhydrogensiloxane which is a homo- or copolymer containing at least one siloxane unit represented by the general formula (R.sup.2).sub.b SiO.sub.(4-b)/2, wherein R.sup.2 represents hydrogen or an unsubstituted or substituted monovalent hydrocarbon residue, and b satisfies a relation 0.ltoreq.b.ltoreq.

Abstract: An addition-type silicone rubber composition comprising (a) an organopolysiloxane containing at least two alkenyl groups bonded to the silicon atoms in one molecule, (b) an organopolysiloxane containing one alkenyl group bonded to the silicon atom in one molecule on an average, (c) an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to the silicon atoms, (d) a platinum catalyst; and a product of curing the composition. This silicone rubber composition can give a low-modulus silicone rubber by curing which neither contaminates the material in contact therewith nor deforms owing to shrinkage, without hindering the adhesion of the composition during its curing stage.

Abstract: A homogeneous composite is provided comprising (a) about 0.5 to 90% by weight of an ultrahigh molecular weight linear polyethylene having a molecular weight of at least about 400,000, a crystalline melting point of greater than 143.degree. C., the reduction of said melting point upon remelting being at least 3.degree. C., and a crystal morphology comprising a bimodal distribution of molecular chain fold spacings reflecting significant populations of both folded and very highly extended molecular chains, and (b) about 0.5 to 90% by weight of at least one filler compound having a neutral-to-acidic surface, said polyethylene being polymerized onto the surface of said filler, and said composite being substantially free of polymer-free filler and of filler-free polymer. Also provided are processes for the preparation of such composites.

Abstract: The curable organosiloxane compositions of the present invention contain a hydrosilylation catalyst that is microencapsulated within a layer of silicone resin or polysilane resin. These compositions are characterized by the presence of carbon black or a member from a specified group of metal compounds that prevents coagulation in cured materials of the resin portion of the microencapsulated catalyst.

Abstract: A polylactone-modified organopolysiloxane compound, wherein a polylactone-containing group represented by the formula (I) is bound to a silicon atom located at at least either of the terminal positions and/or intermediate positions to impart excellent properties as a synthetic resin modifier (when Y in (I) is an acetyl group or a hydrogen atom) or as a film former (when Y in (I) is a hydrogen atom): ##STR1## wherein Z represents a trivalent hydrocarbon residue which may contain oxygen, sulfur or/and nitrogen atom(s); X represents a lactone group of the formula, ##STR2## (wherein R represents a hydrogen atom or an alkyl group containing from 1 to 12 carbon atoms; a represents an integer from 4 to 6), k and L each represents an integer of 1 or more; and Y represents a hydrogen atom or an acetyl group.

Abstract: A material for a mold which comprises, as main components, a refractory aggregate and a hardenable binder comprising a polyfunctional acrylamide having at least two ethylenically unsaturated groups in the molecule, has an excellent low-temperature rapid hardenability, disintegrability, and pot life and is especially suitable as a material for a mold for casting a low-melting-point metal such as an aluminum alloy.

Abstract: A two-component polyurethane composition has good shelf stability and the adhesive made by curing the same has good high temperature stability and no adhesion loss after high temperture bake. The base or prepolymer component containing a primary hydroxyl intermediate also has a sufficiently large excess of free isocyanate so that the ratio of free NCO groups in the prepolymer component to OH curative groups plus any amine groups in the curative component is generally from about 1.2 to about 2.0. The curative component contains a trimerization catalyst so that upon cure, isocyanurate units are produced. The system also contains molecular sieves, as well as phosphorous-type adhesion promoters.

Abstract: Preceramic compositions which are useful in providing protective ceramic coatings on carbon/carbon composites, graphite, and other carbonaceous materials are prepared by dispersing about 0.4-1.5 parts by weight of silicon carbide, silicon nitride, or a mixture thereof in a solution of one part by weight of a polysilazane in about 2.5-10 parts by weight of a liquid aromatic hydrocarbon.

Abstract: An improved aqueous silicone emulsion which cures to a reinforced elastomer upon removal of water is obtained through the use of an anionic, stable dispersion of fumed silica in water as the source of reinforcing silica. The fumed silica dispersion is combined with an aqueous, anionic emulsion of crosslinkable polydiorganosiloxane and a crosslinking system.

Abstract: A shelf stable aqueous silicone emulsion which yields an elastomer upon removal of the water is produced by combining a reactive polydiorganosiloxane present as a cationic or nonionic emulsion of dispersed particles in water, a crosslinker, and a tin catalyst, the tin catalyst being in the form of a divalent tin atom combined with organic radicals. The emulsion can be reinforced with colloidal silica without effecting the shelf life of the reinforced emulsion.

Abstract: Disclosed are micronized synthetic calcium silicates in the form of fluffy particles of needle-like calcium silicate crystals having a particle size of about 0.5 to 50 microns and an average particle size d.sub.50 of from 5 to 25 microns, and preferably of from 7 to 15 microns, obtainable from micronized, approximately spherical synthetic calcium silicate hydrate aggregates having a diameter of from 10 to 150 microns. They are preferably used in filled and unfilled liquid resin systems.

Abstract: Ultravioletsetting resin composition contains fragmentary quartz glass powder in the ratio of 50 to 200 parts to 100 parts of the ultravioletsetting resin. The surface hardness of the ultravioletsetting resin of the present invention is increased in a short time by the application of ultraviolet rays.

Abstract: Disclosed is a polyamide composite material comprising (A) 100 parts by weight of a polyamide resin and (B) 0.05 to 30 parts by weight of a layered silicate uniformly dispersed in the component (A), wherein the reaction ratio of the components (A) and (B) is 60% or less. Disclosed is also a method for preparing a polyamide composite material comprising making a composite in which a layered silicate, with a cation exchange capacity of 50 to 200 milliequivalents/100 g, is in the swelling condition in a dispersion medium; and mixing the composite with a polyamide resin.

Abstract: Cyclic polycarbonate oligomers are polymerized by ultrasonic cavitation, either using a positive pressure of the ultrasonic probe or in combination with the action of at least one cyclic polycarbonate oligomer polymerization catalyst. Polymerization by this method may be effected on neat cyclic polycarbonate oligomers or on mixtures thereof with reinforcing agents such as glass fibers.

Abstract: A room temperature-curable composition comprising (A) a silanol-terminated polydiorganosiloxane having a viscosity measured at 25.degree. C. of from 100 to 200,000 cSt, (B) an epoxy-terminated polyether, (C) an organosilicon compound, (D) an inorganic filler, and (E) a curing catalyst. The composition is suitably used as a building sealant which causes no fouling of the areas surrounding joints even after applied to the joints.

Abstract: A silicone sealant prepared by curing and cross-linking methylhydrosiloxanes by contacting and forming a mixture of an allyl amide or an allyl ester with at least one methylhydrosiloxane in the presence of a Group VIII metal catalyst, and heating the mixture of the allyl amide, the methylhydrosiloxane, a filler, and the Group VIII metal catalyst, in the presence of ambient moisture until the methylhydrosiloxane becomes cured and cross-linked.

Abstract: The curable resin composition of the present invention consists of a curable resin having uniformly dispersed therein particles of a cured silicone rubber obtained from an organosiloxane composition curable by a platinum-catalyzed hydrosilation reaction, wherein said organosiloxane composition contains reaction products of an ethylenically unsaturated epoxy compound and an ethylenically unsaturated aromatic compound with the organohydrogenpolysiloxane present in said organosiloxane composition. Either or both of the epoxy compound and the aromatic compound can be prereacted with a portion of the silicon-bonded hydrogen atoms of the organohydrogenpolysiloxane.

Abstract: This invention, therefore, relates to the field of polyurethane coatings for use in automobile basecoat/clearcoat systems. In particular, this invention relates to water-dispersible polyurethane resins having polyether sidechains which may be utilized in basecoat compositions as principal resins or grind resins. These polyurethane resins may be laterally stabilized or terminally stabilized. The terminally stabilized resins of this invention are preferably employed as principal resins in basecoat compositions.

Abstract: A room temperature curing composition comprising:(A) a silanol-terminated polydiorganosiloxane;(B) a hydrolyzable silyl-terminated polymer obtained by reacting:(a) an epoxy-terminated polyether;(b)(i) an heterocyclic compound containing imino groups, and/or;(ii) an aromatic compound or a heterocyclic compound containing mercapto groups; and,(c) an organosilicon compound containing an epoxy group and a hydrolyzable group;(C) an inorganic filler; and,(D) a curing catalyst.

Abstract: In a process for the manufacture of shaped polyethylene terephthalate structures, such as film or fiber, a crystalline sodium aluminosilicate molecular sieve is used as the catalyst for the polymerization of di(2-hydroxyethyl phthalate) or higher oligomer intermediate. In film, especially for audio and video tapes, the molecular sieve serves both as the catalyst and as a slip additive. In addition to the fact that this process eliminates antimony trioxide, heretofore used as the polymerization catalyst, the polyethylene terephthalate film made by the process of this invention has considerably fewer defects such as microgel inclusions, black specks, and pimples. Further, the amount of diethylene glycol formed in the process is reduced. Finally, polyethylene terephthalate degradation, contributing to the exudation of lower molecular weight materials, also is reduced.

Abstract: Single-component diorganopolysiloxane compositions, stable in storage in the absence of atmospheric moisture and crosslinkable into elastomeric state in the presence of moisture, well adapted, e.g., as sealants and adhesives for the construction industry, contain (A) a diorganopolysiloxane polymer having silanol endgroups, (B) a ketiminoxysilane crosslinking agent, (C) a stabilizing amount of an isocyanurate of the formula: ##STR1## (D) an inorganic filler material, and (E) a metal curing catalyst.

Abstract: Hot-bonding silicone adhesive composition prepared by kneading and heating a mixture of a polydiorganosiloxane and a microparticulate silica and then adding an arbitrary amount of a solvent and an organopolysiloxane resin to the kneaded and heated mixture. The composition has substantially no tack at room temperature when freed of its solvent; however, it has high adhesive strength at elevated temperature.

Abstract: An improved moldable low density thermoplastic composite containing hollow glass spheres comprising a blend of thermoplastic resin, glass fiber reinforcement, and a concentrate of hollow glass spheres dispersed in thermoplastic resin.

Abstract: The invention provides a liquid coating composition for forming a transparent and hard coating film on a plastic member such as a polycarbonate or polymethyl methacrylate plate. The liquid composition comprises 100 parts by weight of an organotrialkoxysilane R.sup.1 Si(OR.sup.2).sub.3, where R.sup.1 is a C.sub.1 - or C.sub.2 -alkyl group and R.sup.2 is a C.sub.1 -, C.sub.2 - or C.sub.3 -alkyl group, 5-20 parts by weight of an organotrialkoxysilane R.sup.3 Si(OR.sup.2).sub.3, where R.sup.3 is an organic group containing epoxy group, 50-200 parts by weight of an aqueous colloidal silica sol in which the content of SiO.sub.2 is 10-40 wt %, and 0.5-3 parts by weight of a dicarboxylic acid (CF.sub.2).sub.n (COOH).sub.2, where n is an integer from 1 to 5, preferably hexafluoroglutaric acid. On a surface of a plastic member a coating film of this composition is partially cured at 70.degree.-150.degree. C. to turn into a fairly hard but still pliable film.