Abstract: Fluoroinfused composites exhibiting low surface energy and low kinetic coefficent of energy are prepared via contact of a swellable polymeric material with a solution comprising a swelling solvent, an organofluorosilane and a gelling agent.

Abstract: An intermediate toner transfer component is disclosed comprising a substrate and a coating comprised of integral, interpenetrating networks of haloelastomer, titanium oxide, and optionally polyorganosiloxane.

Abstract: A fusible interlining has a textile substrate employed with a single adhesive layer and is intended to be bonded to drapery. The adhesive layer includes a first phase in the form of thermoplastic powder of dense granules whose primary function is to ensure the adhesion of the fusible interlining to the drapery at the time of bonding. A second phase of the adhesive layer is a crosslinkable system including a crosslinkable resin and a hardener in the form of a homogeneous matrix whose main function is to coat the granules of the thermoplastic powder of the bonding system.

Abstract: A polymer composition especially suitable for producing fiber-reinforced structures having advantageous fracture toughness comprises a polyarylsulphone component and a thermoset resin component, each of which components is present at least partly as a phase continuous in at least one dimension. Preferred polyarylsulphones contain repeating units (PhSO.sub.2 Ph).sub.n and (Ph).sub.a linked through ether and/or thioether, where Ph is phenylene, n=1 to 2 and a=1 to 3; and such polyarylsulphones having amino end groups are provided as new compounds. The compositions can be made by spinodal decomposition of a mixture of the polyarylsulphone and a thermoset resin precursor.

Abstract: A contact lens is described which is synthesized by reaction in a mold of a isocyanate capped poly(dialkylsiloxane) prepolymer with a poly(dialkylsiloxane) di- or polyalkanol. The clear polyurethane rubber contact lens is readily made completely wettable by a transfer-grafting process or post-treatment and has a high oxygen permeability.

Abstract: A polymeric coating agent which comprises a polymer of from 60 to 97 wt. % of one or more (meth)acrylic monomers the polymerization of which can be initiated by free radicals, from 3 to 40 wt. % of at least one .alpha., .omega.-hydroxy-, carboxy-, and/or epoxy-functional polysiloxanes of the formula (I) ##STR1## wherein R' can be the same or different and is C.sub.1-6 alkyl, and R can be the same or different and is ##STR2## wherein Alk and Alk' are C.sub.1-6 alkylene and the alkylene groups in a molecule can be the same or different, n is a cardinal number from 8 to 40, m is a cardinal number from 2 to 30, and p is a cardinal number from 1 to 20 of solids in the monomers.

Abstract: The polysiloxane network (1) of this polymeric material is formed by (1a) at least one .alpha.,.omega.-dihydroxylated polydimethylsiloxane and/or an .alpha.,.omega.-dihydroxylated poly(dimethyldiphenyl)siloxane containing at least 70% of dimethylsiloxane units; (1b) a crosslinking agent and/or a bridging agent ensuring the crosslinking as well as a bond between the networks; optionally (1c) a polycondensation catalyst. The acrylic network (2) is formed by (2a) at least one (meth)acrylic monomer containing no hydrophilic functional group; optionally (2b) a crosslinking agent and (2c) a radical polymerization initiator. The polymerization mixture contains all these constituents and sufficient inhibitor of free radical formation to prevent, at the outset, the initiator (2c) producing radicals which, combined with the catalyst (1c) would annihilate the catalytic properties of the latter, to form the network (1) before the network (2). Application: manufacture of articles of all shapes.

Abstract: An amine reacted acrylated epoxy resin blend that is particularly suitable for impregnating a fiber material and at least initial curing by exposure to ionizing radiation. These epoxy resins are basically produced by combining epoxy resins, including esterified epoxy resins, with stoichiometric quantities of aliphatic or cyclo aliphatic polyamines. The resins can be used to impregnate fibers which are exposed to ionizing radiation such as an electron beam or ultraviolet light and immediately formed into a structure, such as by filament winding. A short exposure to the ionizing radiation produces a stress-free, self supporting structure that can be fully cured through simple heating without elaborate tooling, vacuum bagging, autoclaves or the like.

Abstract: This invention relates to sol-gel methods for forming non-shrinking, high-glass composite materials and the products. Also taught is an inorganic-organic composite material having a solid interwoven network of an inorganic polymer matrix with interpenetrating polymerized alcohols. The inorganic matrix can be based on either Si or Ti atoms.

Abstract: Polymeric inorganic-organic compositions are obtained by intimately mixing a hydrolyzable precursor of an inorganic gel of silicon, titanium, or zirconium with an organic polymer and with an organic carboxylic acid having a pK.sub.a value of at most 4.0, present in an amount of at least 2 moles per mole of inorganic component, under conditions such that a homogeneous solution of all three components is initially formed, agitating the solution at 0.degree.-100.degree. C. until gelation of the inorganic component occurs, and recovering the inorganic-organic composition. Water need not be present as an initial reactant. Such compositions often are transparent, always have improved toughness, as compared with inorganic gels alone, and are believed to have a structure in which the organic polymer is entrapped in the inorganic gel in such an intimate manner that these two components cannot be separated from each other by physical means without destruction of the organic polymer.

Abstract: An interpenetrating polymer system prepared from a mixture of a moisture-cured prepolymer component and elastomeric component which is non-reactive with the prepolymer component, wherein exposure of the mixture to ambient moisture cures the prepolymer component entrapping the elastomeric component and forming a product which is essentially thermoset. The product may be essentially non-foamed or highly foamed and and either tack-free or self-adhesive. It is particularly suitable for use as sealing gaskets, sheet stock, tubing, and as sealant-encapsulants.

Abstract: New compositions useful as the optics of intraocular lenses, in particular injectable intraocular lenses, are disclosed. In one embodiment, such compositions comprise polymer mixtures derived from the polymerization, for example, cross-linking, of curable components in precursor mixtures. These precursor mixtures comprise curable component comprising: (A) an unsaturation functional (vinyl group-containing) polyorganosiloxane component, (B) an organosilicon component including silicon-bonded hydride groups which react with the unsaturation functional groups included in (A) during the polymerization, and (C) an effective amount of a platinum group metal-containing catalyst component; and a polymer component which is substantially non-functional. The viscosity of the polymer component is greater than the viscosity of the curable component.

Abstract: This invention relates to crosslinkable polymeric compositions and a process for preparing them which show a low content of vinyl monomers, are suitable for the fabrication of composite materials, have good mechanical properties, and comprise: a liquid polyisocyanate; a polyol having a maximum functionality of 7 and an average molecular weight of from about 200 to about 10,000; an unsaturated polyester or a vinylester resin; a radical polymerization initiator stable at temperatures below 70.degree. C.; a decomposition promoter for the initiator; a trimerization catalyst for the isocyanate; and optionally, a mineral filler having dehydrating properties.

Abstract: A composition comprising a blend of (a) a polymeric matrix component comprising crosslinkable polymers made from 80 to 99 parts by weight of at least one .alpha.,.beta.-ethylenically unsaturated monomer and from 1 to 20 parts by weight of at least one chelating compound, (b) a liquid-absorbent component comprising a water-absorbent, preferably water-soluble, polymer, and (c) a multivalent metal ion as a crosslinking agent. This composition is capable of forming liquid-absorbent, semi-interpenetrating networks. The composition of this invention can provide polymeric matrices which, when coated on a transparent backing, result in transparent coatings capable of providing improved combinations of ink absorption and durability, while at the same time retaining transparency and being amenable to the types of processing commonly used in producing transparent graphical materials.

Abstract: Disclosed are moisture and temperature resistant electrical connectors for sealingly connecting transmission means and sealant compositions adapted for use in such connectors, the sealants comprising (i) elastomeric thermoplastic polymer; (ii) extender for said elastomeric thermoplastic polymer; and (iii) cross-linked polymer. The cross-linked polymer is preferably cross-linked in the presence of said elastomeric thermoplastic polymer and is preferably a silicon-based cross-linked polymer.

Abstract: A liquid-absorbent composition comprising (a) a polymeric matrix component comprising crosslinked silanol moieties, and (b) a liquid-absorbent component comprising a water-absorbent polymer, preferably a water-soluble polymer. This composition is capable of forming liquid-absorbent, semi-interpenetrating polymeric networks, which are capable of absorbing significant quantities of those liquids that are solvents for the uncrosslinked portion of the network without loss of physical integrity and without leaching or other forms of phase separation. The compositions of this invention provides polymeric matrices which result in transparent coatings capable of providing improved combinations of ink absorption and durability, while at the same time retaining transparency and being amenable to the types of processing commonly used in producing transparent graphical materials.

Abstract: One of the objects of the present invention is to produce a shaped article of a cured resin having well-balanced heat resistance and toughness by using a plural liquid pack type heat-curable resinous composition of a low liquid viscosity and excellent handling property with good storage stability. As claimed in the present invention, individual components comprising a polyisocyanate compound (a), a radically polymerizable unsaturated monomer compound bearing no functional group reactive with isocyanate, for example, styrene or a (meth)acrylic acid derivative (b), a polyol compound bearing no radically polymerizable unsaturated bond such as a polyether polyol (c), a radical catalyst (e) and a ring-forming catalyst (d) are separated into 2 liquid packs or 3 liquid packs, and they are mixed on molding, fed into the mold, and reaction-cured in the mold to give a shaped article of a cured resin of excellent heat resistance, toughness and other properties.

Abstract: A high temperature semi-interpenetrating polymer network (semi-IPN) was developed which had significantly improved processability, damage tolerance and mechanical performance, when compared to the commercial Thermid.RTM. materials. This simultaneous semi-IPN was prepared by mixing a thermosetting polyimide with a thermoplastic monomer precursor solution (NR-150B2) and allowing them to react upon heating. This reaction occurs at a rate which decreases the flow and broadens the processing window. Upon heating at a higher temperature, there is an increase in flow. Because of the improved flow properties, broadened processing window and enhanced toughness, high strength polymer matrix composites, adhesives and molded articles can now be prepared from the acetylene endcapped polyimides which were previously inherently brittle and difficult to process.

Abstract: A polyester resin composition obtained by melt-mixing a mixture comprising resin components comprising as main resins(A) a thermoplastic polyester resin and(B) a polyorganosiloxane graft copolymer obtained by graft-polymerizing one or more kinds of vinyl monomer containing at least an epoxy group-containing vinyl monomer onto a compound rubber in which a polyorgano-siloxane rubber and a polyalkyl (meth)acrylate rubber have been inseparably united with each other. According to the present invention is provided a polyester resin composition in which the impact resistance of a thermoplastic polyester resin, a main constituent, has been improved over a wide temperature range including low temperatures below 0.degree. C., and which provides molded products having good appearance.

Abstract: Improved acoustic damping materials comprise interpenetrating polymer netks having a soft polymer component and a hard polymer component. The soft polymer component, constituting from 50 to 90 percent by weight of the material, is a polyurethane made by polymerization of a diisocyanate with a polyether glycol, and the hard polymer component is made by polymerization of bisphenol A diglycidyl ether, with boron trichloride amine complex as a curing agent.

Abstract: This invention is a semi-interpenetrating polymer network which includes a high performance thermosetting polyimide having a nadic end group acting as a crosslinking site and a high performance linear thermoplastic polyimide having the following repeating unit. ##STR1## wherein Z=C or SO.sub.2. Provided is an improved high temperature matrix resin which is capable of performing in the 200.degree. to 300.degree. C. range. This resin has significantly improved toughness and microcracking resistance, excellent processability, mechanical performance and moisture and solvent resistances.

Abstract: Improved acoustic damping materials comprise interpenetrating polymer netks having a soft polymer component and a hard polymer component. The soft polymer component, constituting from 50 to 90 percent by weight of the material, is made by polymerizing an aromatic diisocyanate with a polyalkylene ether glycol, and the hard polymer component is an acrylic polymer made by polymerization of the alkyl esters and alkylene diesters of acrylic and/or methacrylic acid, e.g. n-butyl methacrylate and tetramethylene glycol dimethacrylate. The curing of the mixture is carried out at room temperature.

Abstract: Polyolefin molding compositions and molded articles thereof exhibit exceptional mechanical strength, dimensional accuracy and heat deformation characteristics and are provided by melt-blending a polyolefin base resin, a liquid-crystal polyester resin, and a filler material. The liquid-crystal polyester is one which exhibits optical anisotropic characteristics in the melt-phase and preferably has a melt-viscosity of 20000 to 50 Poise as determined at a temperature of 310.degree. C. and a shear rate of 1200 sec.sup.-1. The liquid-crystal polyester resin forms a three-dimensional network structure throughout the polyolefin base resin and envelops substantially all of the filler material therewithin. As a result, the molded articles of the polyolefin compositions can be employed in end-use applications which require improved mechanical strength, dimensional accuracy and/or heat deformation characteristics.

Abstract: A high temperature semi-interpenetrating polymer network (semi-IPN) was developed which had significantly improved processability, damage tolerance and mechanical performance, when compared to the commercial Thermid.RTM. materials. This simultaneous semi-IPN was prepared by mixing the monomer precursors of Thermid.RTM. AL-600 (a thermoset) and NR-150B2 (a thermoplastic) and allowing the monomers to react randomly upon heating. This reaction occurs at a rate which decreases the flow and broadens the processing window. Upon heating at a higher temperature, there is an increase in flow. Because of the improved flow properties, broadened processing window and enhanced toughness, high strength polymer matrix composites, adhesives and molded articles can now be prepared from the acetylene end-capped polyimides which were previously inherently brittle and difficult to process.

Abstract: An infinite network polymer containing fluorine as a coating or cladding material for optical fibers. Fluoropolymers, such as silicone amine C.sub.0 -C.sub.16 fluoroepoxy resin and cis-trans fluoropolyol polyacrylate, reduce water permeability because of the bonding between the fluoropolymer and the substrate. The fluoropolymers exhibit substantially increased moisture resistance when compared to conventional fiber coating materials. Variations in chemical structure effect physical properties of the polymer and different compounds can be chosen for their desired physical properties, such as moisture resistance or abrasion resistance. Incorporation of fluorine into the polymer structure lowers the index of refraction such that the polymer can be used as a cladding for silica glass in an optical fiber. One fluoropolymer formulation allows in-line coating of the optical fiber in a oxygen environment.

Abstract: A polyarylene sulfide resin composition excellent in compatibility between a polyarylene sulfide resin and a polyorganosiloxane graft copolymer is obtained by melt-mixing a composition consisting essentially of 60 to 99 parts by weight of a polyarylene sulfide resin, to 40 parts by weight of a polyorganosiloxane graft copolymer which was obtained by graft-polymerizing one or more kinds of a vinyl monomer onto particles of a compound rubber consisting of a polyorganosiloxane rubber component and a polyalkyl (meth)acrylate rubber component inseparably united with each other, and 0.01 to 10 parts by weight of and organic silane compound having an epoxy group per 100 parts of the mixture.

Abstract: A polyarylene sulfide resin composition obtained by melt-mixing a mixture comprising resin components comprising as main resins(A) a polyarylene sulfide resin and(B) a polyorganopsiloxane graft copolymer obtained by graft-polymerizing one or more kinds of vinyl monomer containing at least an epoxy group-containing vinyl monomer onto a compound rubber in which a polyorganosiloxane rubber and a polyalkyl (meth)acrylate rubber have been inseparably united with each other. The composition of the present invention, whether it contains a filler or not, is excellent in compatibility between the polyarylene sulfide resin and polyorganosiloxane graft copolymer. If this composition is extrusion-molded or injection-molded under the common molding conditions, it keeps its original dispersed and mixed condition without showing a phase separation.

Abstract: A pressure-sensitive adhesive comprising an acrylate matrix, and swellable, infusible, insoluble, elastomeric acrylate microspheres, each of the microspheres having discrete boundaries, the microspheres and the matrix forming an interpenetrating polymer network within the boundaries of the microspheres.

Abstract: This invention relates to sol-gel methods for forming non-shrinking, high-glass composite materials and the products. Also taught is an inorganic-organic composite material having a solid interwoven network of an inorganic polymer matrix with interpenetrating polymerized alcohols. The inorganic matrix can be based on either Si or Ti atoms.

Abstract: A method of making pigmented hydrophilic polymers in such a manner that the resulting polymers absorb ultraviolet and visible radiation, and that no migration, separation or leaching of the pigment can take place, is disclosed. The polymer compositions comprise blends of hydrophilic polymers with melanin pigments, the latter being synthesized on the hydrophilic polymer matrix. The disclosed polymer compositions are useful in the manufacture of ocular devices, particularly intraocular lenses and aphakic contact lenses capable of absorbing ultraviolet and visible radiation, at wavelengths between 300 and 700 nanometers, to the same extent as the natural crystalline lens of the eye. The disclosed method is also useful to impart photoprotective properties to the already made said ocular devices.

Abstract: An interpenetrating polymer system prepared from a mixture of a moisture-cured prepolymer component and an elastomeric component which is non-reactive with the prepolymer component, wherein exposure of the mixture to ambient moisture cures the prepolymer component entrapping the elastomeric component and forming a product which is essentially thermoset. The product may be essentially non-foamed or highly foamed and and either tack-free or self-adhesive. It is particularly suitable for use as sealing gaskets, sheet stock, tubing, and as sealant-encapsulants.

Abstract: A bone cement is prepared by synthesizing a polymeric composition comprising poly(methyl methacrylate) cross-linked by copolymerization with tris(.omega.-methacryloyl) polyisobutylene. A powder is formed from the composition, and the final cement is prepared by mixing the powder with additional methyl methacrylate in the presence of a catalyst to form a dough-like material that is polymerized in situ to yield a cement useful for orthopedic purposes. Preferred embodiments employ tris(.omega.-methacryloyl) compounds within a particular molecular weight range, and which are present in the powder in particular amounts relative to the poly(methyl methacrylate) component therein.

Abstract: Improved acoustic damping materials comprise interpenetrating polymer netks having a soft polymer component and a hard polymer component. The soft polymer component, constituting from 75 to 95, preferably 90, percent by weight of the material, is made by polymerizing an aromatic diisocyanate with a polyalkylene ether glycol, and the hard polymer component is a vinyl ester polymer made by polymerization of the acrylate or methacrylate ester of the diglycidyl ether of a polyphenol. The curing of the mixture is carried out at room temperature in presence of a peroxide and an aromatic amine. The mixture of ingredients, while liquid, may be injected into mechanical devices, such as shafts of rotating equipment whose noise is to be dampened, and allowed to cure therein.

Abstract: A polymer composition especially suitable for producing fibre-reinforced structures having advantageous fracture toughness comprises a polyarylsulphone component and a thermoset resin component, each of which components is present at least partly as a phase continuous in at least one dimension. Preferred polyarylsulphones contain repeating units (PhSO.sub.2 Ph).sub.n and (Ph).sub.a linked through ether and/or thioether, where Ph is phenylene, n=1 to 2 and a=1 to 3; and such polyarylsulphones having amino end groups are provided as new compounds. The compositions can be made by spinodal decomposition of a mixture of the polyarylsulphone and a thermoset resin precursor.

Abstract: Improved acoustic damping materials comprise interpenetrating polymer netks having a soft polymer component and a hard polymer component. The soft polymer component, constituting from 50 to 90, preferably 70, percent by weight of the material, is made by polymerizing an aromatic diisocyanate with a polyalkylene ether glycol, and the hard polymer component is a vinyl ester polymer made by polymerization of a vinyl ester resin such as the acrylate or methacrylate ester of the diglycidyl ether of a polyphenol. Optionally, the vinyl ester resin may be brominated, whereby increased fire retardance is conferred upon the interpenetrating polymer network. The mixture is cured at room temperature.

Abstract: A thermoplastic resin comprises a graft copolymer obtained by graft-polymerizing one or more kinds of vinyl monomer onto a compound rubber, wherein that compound rubber is obtained by inseparably entangling a polyalkyl(meth)acrylate rubber and a modified polyorganosiloxane rubber, the modification being obtained by radical polymerization of 1 to 15 parts by weight of at least one monomer selected from the group consisting of a polyfunctional unsaturated compound having at least one (meth) acryloyloxy group and a polyfunctional unsaturated compound having a cyanuric acid or isocyanuric acid skeleton in the presence of a polyorganosiloxane rubber.

Abstract: A liquid-absorbent composition comprising (a) a polymeric matrix component comprising crosslinked silanol moieties, and (b) a liquid-absorbent component comprising a water-absorbent polymer, preferably a water-soluble polymer. This composition is capable of forming liquid-absorbent, semi-interpenetrating polymeric networks, which are capable of absorbing significant quantities of those liquids that are solvents for the uncrosslinked portion of the network without loss of physical integrity and without leaching or other forms of phase separation. The compositions of this invention provides polymeric matrices which result in transparent coatings capable of providing improved combinations of ink absorption and durability, while at the same time retaining transparency and being amenable to the types of processing commonly used in producing transparent graphical materials.

Abstract: A polyphenylene ether resin composition comprising(A) a polyphenylene ether resin,(B) a polystyrene resin, and(C) a graft copolymer prepared by graft-polymerizing one or more vinyl monomers onto a compound rubber having an average particle diameter of 0.08 to 0.6 .mu.m and a structure wherein 10 to 90% by weight of a polyorganosiloxane rubber component and 90 to 10% by weight of a polyalkyl (meth)acrylate rubber component are tangled with each other so as not to separate, the total amount of the polyorganosiloxane rubber component and the polyalkyl (meth)acrylate rubber component being 100% by weight of the compound rubber. This resin composition provides molded products superior in impact resistance, heat resistance, mechanical strength, and surface appearance and is superior in moldability and flow properties.

Abstract: This invention provides hardenable compositions useful as construction media for a wide range of applications. Particular utility is found in the dental and medical arts where such compositions are highly suitable for the formation and construction of denture base, denture baseplates, denture liners, denture repair, custom trays, veneering for crowns and bridgework, artificial teeth, veneers and repair for natural teeth, and tooth restorative fillings. Such materials having improved impact strengths and elastic moduli when hardened are disclosed which include rubber-modified polymer.

Abstract: A polymeric material used in laminates with metal-comprises an interpenetrating polymer network composed of a cyclic moiety-containing pollyallyl compound optionally with an aromatic difunctional compound (co)polymerized and cross-linked in the presence of a free radical initiator, and an epoxy resin cross-linked with a polyhydric phenol.

Abstract: A loudspeaker component is bonded to a diaphragm formed of an olefinic resin, by applying an adhesion primer to bonding positions of the component and/or the diaphragm, applying an adhesive to the bonding positions after the primer has cured, and superposing the component and diaphragm. An air curing unsaturated polyester resin is used as the adhesion primer.

Abstract: A polymer particle is provided comprising a rubbery polymer and a methacrylic glassy polymer as formed in latex interpenetrating polymer networks structure, which is prepared by swelling a rubbery polymer with a swelling solvent and carrying out an emulsion polymerization reaction of methacrylic monomers in the presence of said swollen rubbery polymer. Also provided are a resin composition comprising the polymer particles, such as poly (alkylene terephthate) resin melt-blended with the polymer particles, and a molded article of the resin composition. The molded article has a high impact-strength.

Abstract: This invention relates to low haze impact-resistant transparent compositions, comprising:(a) 40-99% by weight of a thermoplastic resin based on homopolymers and/or copolymers of alkyl-methacrylates with minor amounts of alkyl-acrylates, wherein the alkyl group contains from 1 to 8 carbon atoms, and(b) 60-1% by weight of a polymer having a multi-layer structure, based on elastomers arranged sequentially to thermoplastic resins as defined in step (a).

Abstract: A vibration-proof damping polymer material characterized in that the material is prepared from a polymer substance obtained by dissolving an amorphous fluorine-containing polymer in an acrylic monomer and polymerizing the monomer with or without permitting the resulting polymer to form an interpenetrating polymer network, and a vibration-proof damping polymer material characterized in that the material is prepared from a blend of (a) and (b), (a) being an amorphous fluorine-containing polymer or crystalline polymer containing vinylidene fluoride, and (b) being an acrylic polymer.

Abstract: This invention relates in general to the formation of fibers having a controlled molecular orientation prepared from rod-like extended chain aromatic-heterocyclic ordered polymers, and containing a binder in the micro-infrastructure. Such fibers have high tensile strength, modulus, and environmental resistance characteristics.

Abstract: A porous membrane is formed from an interpenetrating polymer network of a hydrophobic polymer and a polymerized and crosslinked hydrophilic monomeric composition. A solution of the polymer and monomeric composition is cast, exposed to ultraviolet radiation, coagulated and dried. The resulting dried membrane is annealed in order to render its surface hydrophilic.

Abstract: This invention is a semi-interpenetrating polymer network which includes a high performance thermosetting polyimide having a nadic end group acting as a crosslinking site and a high performance linear thermoplastic polyimide having the following repeating unit. ##STR1## wherein Z=C or SO.sub.2. Provided is an improved high temperature matrix resin which is capable of performing in the 200.degree. to 300.degree. C. range. This resin has significantly improved toughness and microcracking resistance, excellent processability, mechanical performance and moisture and solvent resistances.

Abstract: Microporous waterproof and moisture vapor permeable products are described which are formed from a matrix having an internal microstructure which is coated with a hydrophobic material. A process is described including the steps of (1) applying to the surface of the matrix a liquid hydrophobic material, (2) allowing the liquid to penetrate into the microstructure and then (3) drying, vulcanizing or curing the product.

Abstract: This invention is a process for making a semi-interpenetrating polymer network which includes a high performance thermosetting polyimide having a nadic end group acting as a crosslinking site and a high performance linear thermoplastic polyimide having the following repeating unit: ##STR1## Provided is an improved high temperature matrix resin which is capable of performing at 316.degree. C. in air for several hundreds of hours. This resin has significantly improved toughness and microcracking resistance, excellent processability and mechanical performance, and cost effectiveness.

Abstract: A thermoplastic resin composition superior in heat stability and impact resistance, which comprises 95-5% by weight of a thermoplastic polymer (A) selected from homopolymers and copolymers of ethylenic unsaturated monomers or from polymers of bifunctionally reactive compounds and 5-95% by weight of a compound-rubber-based graft copolymer which is produced by the graft polymerization of one or more vinyl monomers onto compound rubber particles having an average diameter of 0.08-0.6 .mu.m and structures in which 10-90% by weight of a polyorganosiloxane rubber component and 90-10% by weight of a polyalkyl(meth)acrylate rubber component are tangled together so as not to be separable from each other.