Abstract: The curable resin having a number average molecular weight of 600 to 6000 and at least two hydrolyzable silyl groups which is prepared by reacting an aliphatic polyester resin having acryloyl group and alcoholic hydroxyl group with an isocyanate silane compound: ##STR1## reacting the obtained reaction product with an aminosilane compound: ##STR2## and reacting the obtained reaction product with a monofunctional isocyanate: OCN-R.sup.5 and/or a polyfunctional isocyanate; and the composition containing the resin. The curable resin and the composition are excellent in acid resistance such as acid resin resistance, scratch resistance, solvent resistance, flexibility, and the like.

Abstract: New silanes containing at least two oxazolidinic moieties can be defined by means of the general formula: ##STR1## wherein X.sub.1, X.sub.2, X.sub.3 and X.sub.4 have the meaning as reported in the specification, and each one of A.sub.1, A.sub.2 and A.sub.3 represents from 0 to a plurality of siloxane radicals--SiO--and are better defined in the text of the specification.These compounds are useful as crosslinking agents for moisture-hardening systems based on polyisocyanates, of acrylate polymers and of polyepoxides in compositions for coatings, sealants and adhesive agents.

Abstract: A composition comprising an epoxy resin and a curing agent is blended with a thermoplastic resin impregnated with an organic silicon compound to provide an epoxy resin composition which cures into products having improved adhesion and thermal impact and is suitable for encapsulating semiconductor devices.The impregnated thermoplastic resin is formed by swelling the thermoplastic resin with a solvent and impregnating the swollen thermoplastic resin with the organic silicon compound.

Abstract: A curable coating composition comprising(A) from 10 to 99 parts by weight of a silyl group-containing vinylic polymer having a number average molecular weight of at least 3,000, the main chain thereof being substantially composed of a vinylic polymer chain and having at least one silicon atom bonded to a hydrolyzable group at a terminal of the main chain and/or at a side chain in each molecule,(B) from 1 to 90 parts by weight of an organic compound having a number average molecular weight of not larger than 3,000 and having at least one silicon atom bonded to a hydrolyzable group at a terminal in each molecule, and(C) from 1 to 500 parts by weight of silanol-containing organopolysiloxane having, on an average, at least one sianol group in one molecule to 100 parts by weight of the total amount of the component (A) and the component (B).

Abstract: A moisture-crosslinkable primer which comprises a solution of a hydrogenated polybutadiene into which has been introduced a silyl group of the formula: ##STR1## wherein R is an alkyl group having 1 to 5 carbon atoms, R' is an alkoxy group having 1 to 5 carbon atoms or a halogen atom, and n is an integer of from 1 to 3, in an organic solvent, which has excellent heat-resistant adhesion and durable adhesion and is useful for adhering between polyolefinic substances or between polyolefinic substances and other organic substances.

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: The present invention relates to novel piperidine compounds of the formula (I) ##STR1## in which A is e.g. a group of the formula ##STR2## where R.sub.4 is e.g. hydrogen or methyl, X.sub.3 is e.g. --O-- or --NH-- and R.sub.5 ' is e.g. ethylene, propylene or decamethylene, R.sub.1 is e.g. methyl, methoxy, ethoxy or OH, R.sub.2 and R.sub.3 are e.g. methyl, m+n is e.g. a number from 1 to 40, n varies e.g. from zero to 50% of the sum m+n, X.sub.1 is e.g. as defined for R.sub.1 or is a group (CH.sub.3).sub.3 SiO-- and X.sub.2 is e.g. hydrogen, methyl, ethyl, a group (CH.sub.3).sub.3 Si-- or a group ##STR3## and, when m+n is a number from 3 to 10, X.sub.1 and X.sub.2 together also form a direct bond. The compounds of the formula (I) are effective in stabilising an organic material against thermal, oxidative and light-induced degradation.

Abstract: A process for preparing modified diene polymer rubbers having an increased impact resilience, a reduced hardness at low temperatures and an improved processability, and useful as rubber materials for automobile tires and other industries which comprises producing a conjugated diene polymer having alkali metal end or ends, and reacting the alkali metal-containing polymer with (a) a silicon or tin compound of the formula: R.sub.a MX.sub.b wherein R is an alkyl group, an alkenyl group, a cycloalkenyl group or an aromatic hydrocarbon atom, a is 0, 1 or 2 and b is 2, 3 or 4, and (b) at least one member selected from the group consisting of a nitro compound; a phosphoryl chloride compound of the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are an alkyl group; an aminosilane compound of the formula (2): ##STR2## wherein R.sup.5, R.sup.6 and R.sup.7 are an alkyl group or an alkoxyl group, R.sup.8 and R.sup.

Abstract: A method for preparing asymmetric radial polymers wherein the different polymeric arms are contacted sequentially with a nonpolymerizable coupling agent. Contacting of the final step in the process, which frequently but not necessarily always will be the second step in the process, will be carried out in the presence of a polar compound suitable for increasing the amount of vinyl content in a conjugated diolefin polymer during polymerization thereof. The method used narrows the relative arm distribution of the several asymmetric radial polymers produced and significantly increases the amount of total product having the desired ratio of polymeric arms and accomplishes this objective in relatively short reaction time.

Abstract: A silylated polymeric binder, which is soluble or swellable in alkali, bears a plurality of at least one of aliphatic and aromatic hydroxyl groups, at least a portion of which are derivatized by units of the formulae I and II:[(A--B.sub.n).sub.m C]--[(D.sub.o E.sub.p)BC].sub.u (I)and[(D.sub.o E.sub.p)BC].sub.v (II)which are side chains of the polymeric binder, whereinA denotes a silanyl group containing at least 2 silicon atoms in total linked to each other, but not more than 3 silicon atoms linked to each other in an unbranched chain of silicon atoms;B denotes a bridging group;C denotes a functional group which has formed a covalent bond with an aromatic, aliphatic, or cycloaliphatic hydroxyl group of the binder, the group D, or the group E;D denotes a grafted monohydric or polyhydric aliphatic alcohol;E denotes a grafted monohydric or polyhydric aromatic alcohol;n denotes 0 or 1;m denotes 1 or 2; ando, p, u and v each denote 0 or 1.

Abstract: An aqueous composition for rendering masonry and wood surfaces water repellent is provided, comprising an aqueous mixture containing an alkali metal aminoorgano-functional siliconate and at least one alkali metal organosiliconate.

Abstract: A process for preparing a fluororubber graft copolymer, comprising the step of graft-copolymerizing, onto (A) a fluororubber, (B) at least one organosilicon compound having the general formula (I): ##STR1## wherein R.sup.3 represents a monovalent unsaturated aliphatic hydrocarbon group; and R.sup.N represents as nitrogen-containing organic group having the general formula (II): ##STR2## or the general formula (III): ##STR3## where R.sup.4 and R.sup.5 each represent a hydrogen atom or a C.sub.1 -C.sub.15 organic group, and l is an integer of from 0 to 6, R.sup.6 and R.sup.7 have the same meaning as R.sup.3 and R.sup.4 or may form together a divalent hydrocarbon group represented by the formula:--(CH.sub.2).sub.k --where k represents an integer of 4 to 9, n represents an integer of 1 to 3, and m is an integer of from 0 to 10. The fluororubber graft copolymer has good workability in roll milling, and is vulcanizable under normal pressure.

Abstract: The curable silicone composition of this invention contains as essential components, (A) a copolymer comprised of vinylidene fluoride and/or tetrafluoroethylene component(s), (B) an organopolysiloxane having in its molecule aliphatic unsaturated groups and a fluorine-containing substituent, (C) an organohydrogenpolysiloxane, and (D) a catalyst for addition reaction. This composition can be effectively used as a release agent.

Abstract: There is provided a curable composition, comprising:A. a heterocyclic compound selected from the group consisting of epoxy-functional silicones, epoxy-functional acrylic polymers, and monomers selected from the group consisting of tetrahydrofurans, oxetanes, lactones, spirocarbonates, spiroesters, cyclic sulfur and cyclic nitrogen compounds;B. an Si-H functional silicon compound; andC. a platinum catalyst.There is further provided a method for polymerizing a heterocyclic compound using a platinum catalyst.

Abstract: A flame retardant polymer composition which is substantially free of halogen compounds and of organometallic salts comprises (A) an organic polymer, at least 40% by weight of which is a copolymer of ethylene with one or more comonomers selected from the group consisting of alkyl acrylates, alkyl methacrylates, acrylic acid, methacrylic acid and vinyl acetate, (B) a silicone fluid or gum and (C) an inorganic filler which is a compound of a metal of Group II A of the Periodic Table of Elements but which is neither a hydroxide nor a substantially hydrated compound. Suitable inorganic fillers are magnesium oxide, magnesium carbonate and calcium carbonate, the latter being the most preferred. The compositions are particularly suitable for use in wire and cable applications.

Abstract: A silicon-containing polymer having comb-shape structure comprising a unit of an organopolysiloxane as the main chain and a vinyl polymer as the side chain of the following formula: ##STR1## wherein R.sup.1 is C.sub.1-4 alkylene, R.sup.2, R.sup.3 and R.sup.4 are each C.sub.1-4 alkyl, R is H or methyl, X.sup.1 is hydroxycarbonyl, C.sub.2-5 alkoxycarbonyl, C.sub.3-8 cycloalkyl-oxycarbonyl or phenyl, n is 1-100,000, R.sup.5 is C.sub.1-4 alkyl or phenyl, X.sup.2 is H, C.sub.1-4 alkyl, phenyl, chlorine, C.sub.1-4 alkoxysilyl, or C.sub.1-4 alkyl which is substituted by one to three of --NH.sub.2, --NH--, --SH, --CN or F, l is 2-20, m is 0 or 1-10, which has excellent migration property and is useful as agents for giving water-repellency, adhesion, surface activity, etc. in paints or other compositions, and an intermediate macromonomer, and process for the production thereof.

Abstract: There is a tire having tire performances such as wear resistance, cut resistance, heat build-up and the like and a processability simultaneously and economically improved by the application of a rubber composition containing a rubbery polymer modified with a silane compound and silica. The rubbery polymer modified with the silane compound is obtained by reacting an active terminal of a living polymer, which is obtained by polymerizing a monomer in the presence of an organic alkali metal catalyst, with a silane compound represented by the following general formula:X.sub.n Si(OR).sub.m R'.sub.4-m-n(where X is a halogen atom selected from a chlorine atom, a bromine atom and an iodine atom, OR is a non-hydrolyzable alkoxy group having a carbon number of 4.about.20, an aryloxy group or a cycloalkoxy group, R' is an alkyl group having a carbon number of 1.about.20, an aryl group, a vinyl group or a halogenated alkyl group, m is an integer of 1.about.4, n is an integer of 0.about.2, and a sum of n and m is 2.about.

Abstract: The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA and an aminoxysilicon compound and the second component comprises the same PSA and an amidosilicon compound. The method provides improved adhesive bond strength over an unmodified PSA construction.

Abstract: The invention relates to a method of contacting two components to form a pressure-sensitive adhesive (PSA) construction, wherein the first component comprises a conventional PSA and a hydroxy-functional diorganopolysiloxane and the second component comprises the same PSA and an acyloxysilane. The method provides improved adhesive bond strength over an unmodified PSA construction.

Abstract: This provides an anti-icing coating composition comprising as vehicle components:(a) a copolymer having hydroxyl, or hydroxyl and a reactive group other than hydroxyl and comprising as essential monomer components a fluoroolefin and a vinyl monomer having hydroxyl and copolymerizable with the fluoroolefin,(b) a silicone compound represented by the formula ##STR1## wherein n is an integer of 6 to 300, k is an integer of 0 to 6, h is 0 or 1, m is an integer of 0 to 6, j is 1 or 2, and Y is a) hydroxyl, or b) a group reactive with the hydroxyl or the reactive group in the copolymer (a) and selected from among (i) carboxyl, (ii) epoxy and (iii) a monovalent or bivalent group containing one or two free isocyanate groups, and(c) a polyisocyanate compound.

Abstract: A primer composition dilluted with a suitable organic solvent comprising (A) an organic copolymer comprising an alkoxysilylated monomer, vinyl acetate and other monomers copolymerizable therewith, (B) a polyalkyl (meth)acrylate, (C) a crosslinking agent for said copolymer (A), and (D) an ultraviolet absorber. This primer composition is a very effective primer in forming an organopolysiloxane coating layer excellent in adhesion, endurance, weathering resistance of the surface of a molded article of a thermoplastic resin.

Abstract: A process for preparing modified diene polymer rubbers having an increased impact resilience and a reduced hardness at low temperatures and useful as rubber materials for automobile tires and other industries which comprises producing an alkali metal-containing conjugated diene polymer, and reacting the alkali metal-containing polymer with a modifier selected from the group consisting of a nitro compound, a phosphoryl chloride compound of the formula: ##STR1## wherein R.sup.1 to R.sup.4 are independently an alkyl group, and an aminosilane compound of the formula: ##STR2## wherein R.sup.5 to R.sup.7 are independently an alkyl group or an alkoxyl group, R.sup.8 and R.sup.9 are independently an alkyl group, and n is an integer,said alkali metal-containing diene polymer being prepared by a living anionic polymerization using an alkali metal-based catalyst or by an addition reaction of a diene polymer having conjugated diene units and an alkali metal-based catalyst in a hydrocarbon solvent.

Abstract: A silylated polymeric binder, which is soluble or swellable in alkali, bears a plurality of at least one of aliphatic and aromatic hydroxyl groups, at least a portion of which are derivatized by units of the formula I and II:[(A-B.sub.n).sub.m C]--[(D.sub.o E.sub.p)BC].sub.u (I)and[(D.sub.o E.sub.p)BC].sub.v (II)which are side chains of the polymeric binder, whereinA denotes a silanyl group containing at least 2 silicon atoms in total linked to each other, but not more than 3 silicon atoms linked to each other in an unbranched chain or silicon atoms;B denotes a bridging group;C denotes a functional group which has formed a covalent bond with an aromatic, aliphatic, or cycloaliphatic hydroxyl group of the binder, the group D, or the group E;D denotes a grafted monohydric or polyhydric aliphatic alcohol;E denotes a grafted monohydric or polyhydric aromatic alcohol;n denotes 0 or 1;m denotes 1 or 2; and o, p, u and v each denote 0 or 1.

Abstract: Novel ionomeric silane coupling agents are disclosed and their use in bonding a matrix polymer to a mineral substrate is described. The coupling agents comprise amic acid-functional silanes which are partially neutralized with metal cations and are prepared by reacting a mixture of (I) an amine-functional silane, (II) a stoichiometric excess of a dicarboxylic organic acid and (III) an ionic compound containing a metal cation, wherein 10% to 80% of the excess carboxylic acid functionality is neutralized by the metal cations. The coupling agents greatly improve bonding to the matrix polymer in moist environments and are particularly suitable for use in formulating filled injection molding compositions.

Abstract: A novel ionomeric silane coupling agent is disclosed and its use in bonding a matrix polymer to a mineral substrate is described. The coupling agent is prepared by partially neutralizing the combined acid functionality present in a mixture of an acid-functional silane (or metal salt thereof) and an acid-functional film former with a metal ion. The coupling agent greatly improves bond strength in moist environments and is particularly suitable for use in formulating filled injection molding compositions.

Abstract: Novel halogen-substituted phthalimides are provided which are the reaction product of a halogenated phthalic anhydride with an alkoxylated amine or the reaction product of a halogenated phthalic anhydride with a siloxy amine. The halogen-substituted phthalimides are useful in increasing the flame retardancy of thermoplastic and thermosetting resins, and are also effective as processing aids in improving the flowability and moldability of thermoplastic resins during melt processing.

Abstract: Plasma-resistant polymeric materials are prepared by reacting a polymeric material containing reactive hydrogen functional groups with a multifunctional organometallic material containing at least two functional groups which are reactive with the reactive hydrogen functional groups of the polymeric material, such as hexamethylcyclotrisilazane.

Abstract: Processes for treating polymeric surfaces to produce smooth, durable, slippery coatings which are able to withstand the rigors of sterilization and, long term exposure to human blood and other bodily fluids without substantial loss of their slipperiness. An article or device suitable as a wound drainage device coated in accordance with the process described is also disclosed.

Abstract: A curable composition at room temperature comprising (A) 100 parts by weight of a hydrolyzable silyl group-containing vinyl polymer, (B) 0.1 to 100 parts by weight of a specific silane compound and (C) 0 to 20 parts by weight of a curing catalyst, the silane compound (B) being a silane compound selected from ##STR1## The composition is excellent in not only adhesion to melamine alkyd or malamine acrylic resin coatings but also hardness, solvent resistance and staining resistance.

Abstract: Block copolymers composed of recurrent structural units belonging to the series comprising polysiloxanes and recurring structural units belonging to the series comprising homopolymers, copolymers or terpolymers of vinyl-aromatic compounds and acrylic monomers of mixtures thereof.

Abstract: Organometal-containing polymers having side chains of the formula I ##STR1## in which, for example, M is Si, X is O, R.sup.1 and R.sup.2 are hydrogen and R.sup.4 to R.sup.6 are each methyl and which have an average molecular weight between 1,000 and 1,000,000, are suitable for the preparation of dry-developable photoresists, such as are required for the generation of structured images, in particular in microelectronics.

Abstract: A process for preparing modified diene polymer rubbers having an increased impact resilience and a reduced hardness at low temperatures and useful as rubber materials for automobile tires and other industries which comprises producing an alkali metal-containing conjugated diene polymer, and reacting the alkali metal-containing polymer with a modifier selected from the group consisting of a nitro compound, a phosphoryl chloride compound of the formula: ##STR1## wherein R.sup.1 to R.sup.4 are independently an alkyl group, and an aminosilane compound of the formula: ##STR2## wherein R.sup.5 to R.sup.7 are independently an alkyl group or an alkoxyl group, R.sup.8 and R.sup.9 are independently an alkyl group, and n is an integer, said alkali metal-containing diene polymer being prepared by a living anionic polymerization using an alkali metal-based catalyst or by an addition reaction of a diene polymer having conjugated diene units and an alkali metal-based catalyst in a hydrocarbon solvent.

Abstract: Reactive stabilizing compounds, able to stabilize organic polymers, contain in their molecule a sterically hindered amino group and a hydrolyzable silyl function.In stabilizing organic polymers, said reactive stabilizing compounds can be hydrolyzed at the silyl function with the formation of silanol groups, which are made to interact in order to form complex resinous stabilizing structures. These latter are added in stabilizing quantities to the polymer to the stabilized.According to one particular embodiment, the hydrolysis at the silyl function and the formation of the resinous structure take place spontaneously within the polymer to be stabilized.According to a further embodiment, the reactive stabilizing compound is added to the polymer after being stably supported on a solid support by reaction with an inorganic solid having surface hydroxyl groups.

Abstract: A curable silane resin, and a process for making same, having at least one of two units selected from the group consisting of a prepolymer (C) and a prepolymer (F); the prepolymer (C) having the formula (I): ##STR1## and the prepolymer (F) having the formula (III): ##STR2##The curable resin of our invention has excellent flexibility, solvent resistance and adhesion to organic materials. Furthermore our process for preparing the resin is simpler, more easily reproducible, and results in less unwanted by-prodducts than earlier processes for preparing similar silane resins.

Abstract: Processes for treating polymeric surfaces to produce smooth, durable, slippery coatings which are able to withstand the rigors of sterilization and, long term exposure to human blood and other bodily fluids without substantial loss of their slipperiness.

Abstract: A suspension or emulsion polymerization process for the preparation of modified resin useful as a low-stress semiconductor encapsulant which comprises reacting a silicone oil or a silicone resin an having at least two silanol groups or hydrolyzable alkoxy groups with a silane coupling agent having at least two hydrolyzable alkoxy groups to form a suspension or emulsion of a reactive intermediate product, azeotropically distilling the resulting suspension or emulsion to produce a distrilled intermediate product, and adding an epoxy resin or a phenol resin to the distilled intermediate product to produce a matrix having insoluble and infusible spherical particles.

Abstract: Photochemical conversion of tachysterols to previtamins is conducted in the presence of a polymeric photosensitizer which has the appropriate chromophore groups, e.g. anthracene groups, attached to a medium or high molecular weight, substantially uncrosslinked polymer backbone. The polymeric photosensitizer is soluble in solvents normally used for conducting the photochemical reaction (diethyl ether, dioxane, THF, t.butyl methyl ether) but insoluble in lower alcohols and hydrocarbons, so that it may be readily and simply recovered from the product mixture by use of such non-solvents.

Abstract: A diene polymer expressed by the following general formula and with a weight average molecular weight, determined by GPC, of 10,000 to 1,000,000: ##STR1## (wherein, D.sub.1 indicates a diene polymer, R.sub.1 an organic group of 1 to 20 carbon atoms free from active hydrogen or a silicon compound, m is 0 or an integer of from 1 to 6, and n is 0 or an integer of from 1 to 6, m being 1 or more when n=0 and n being 2 or more when m=0).This diene polymer is used as a vulcanization use rubber composition suitable for tire applications, principally tire treads, stiffeners for high impact polystyrene, etc., thermoplastic elastomers, and thermoplastic resins.

Abstract: Dispersion-process-produced, non-melt-processible, particulate, core-shell, tetrafluoroethylene copolymer comprising recurring units of tetrafluoroethylene and modifying recurring units of at least one ethylenically unsaturated comonomer that is copolymerizable with the tetrafluoroethylene, the number of recurring units of comonomer in the shell being sufficient to enable the copolymer to compound uniformly with an elastomer or plastic without forming visible agglomerates, and blends thereof with elastomeric and plastic resins.

Abstract: A silicon-urethane (meth) acrylate which is a reaction product of an isocyanato-alkylsilane compound represented by the following general formula: ##STR1## wherein R.sub.1 represents an alkylene group having 2 to 5 carbon atoms, R.sub.2 represents an alkyl group having 1 to 5 carbon atoms or alkoxy group having 1 to 5 carbon atoms, and R.sub.3 and R.sub.4 each represents an alkyl group having 1 to 5 carbon atoms, and a hydroxyl group-containing ester of (meth) acrylic acid, a resin composition and a coating material for optical glass fiber comprising said silicon-urethane (meth) acrylate.

Abstract: Novel ionomeric silane coupling agents are disclosed and their use in bonding a matrix polymer to a mineral substrate is described. The coupling agents comprise amic acid-functional silanes which are partially neutralized with metal cations and are prepared by reacting a mixture of (I) an amine-functional silane, (II) a stoichiometric excess of a dicarboxylic organic acid and (III) an ionic compound containing a metal cation, wherein 10% to 80% of the excess carboxylic acid functionality is neutralized by the metal cations. The coupling agents greatly improve bonding to the matrix polymer in moist environments and are particularly suitable for use in formulating filled injection molding compositions.

Abstract: A novel ionomeric silane coupling agent is disclosed and its use in bonding a matrix polymer to a mineral substrate is described. The coupling agent is prepared by partially neutralizing the combined acid functionality present in a mixture of an acid-functional silane (or metal salt thereof) and an acid-functional film former with a metal ion. The coupling agent greatly improves bond strength in moist environments and is particularly suitable for use in formulating filled injection molding compositions.

Abstract: Particulate, multiphase polymers which have a core (A) and an overlying shell (B) wherein the core (A) is an organic, resinous polymer comprising polymerized olefinically unsaturated monomer units having softening point temperatures of at least 30.degree. C. and wherein the shell (B) is an organopolysiloxane are obtained by producing in a first stage an organic resinous polymer in latex form by emulsion polymerization and, in a second stage, the latex particles of the first stage are surrounded with a shell (B) organopolysiloxane by polymerizing low molecular weight organosiloxanes in the presence of the latex particles of the first stage.

Abstract: Fluoroelastomer compositions vulcanizable with peroxides having improved processability and compatibility properties and comprising, as additives, ethylene polymers and ethylene-propylene or ethylene-butene copolymers having, along the polymer chain, ester groups of the type--COOR where R is a C.sub.1 -C.sub.8 alkyl, wherein the ester groups amount to 0.5-10% by weight as referred to the total polymer. Such polymer additives contain the ester group bound to a carbon atom of the chain either directly or through a --CH.sub.2 -- or in the form ##STR1## where R is a C.sub.1 -C.sub.8 alkyl group.

Abstract: A dental resin composition comprising (a) a siloxane polymer obtained by polymerizing an oligomer comprising (I) a silane compound containing therein an ethyleneically unsaturated group having bonded thereto (II) a silane compound containing therein a phenyl group or an alkyl group, (b) a monomer copolymerizable with said siloxane polymer (a), and (c) a polymerization catalyst, and optionally, (d) a filler, is disclosed. The dental resin composition of the invention is markedly improved in physical properties such as compressive strength, bending strength, abrasion resistance, and water sorption and therefore, it is quite useful as a denture base resin, a crown and bridge resin, and a filling resin in the dentistry.

Abstract: A coating composition comprising an anhydride polymer (A) containing at least two cyclic carboxylic acid anhydride functional groups and a polymer (B) containing at least two functional groups reactive with anhydride groups and selected from hydroxyalkylamino, hydroxyalkoxyalkylamino, hydroxysubstituted acyloxyalkylamino, hydroxysubstituted polyacyloxyalkylamino, mercaptoalkylamino and oxazolidino groups. One of the polymers (A) and (B) comprises at least one flexible polymer chain selected from polyether, polyester, silicone, diene polymer, hydrogenated diene polymer, polyurethane, polyisobutylene and polyacrylate chains. The functional groups characteristic of that polymer are each present as a terminal group at the end of a flexible polymer chain.

Abstract: A chemically modified and activated, hydroxyl-group-containing, natural or synthetic, polymeric solid body surface is disclosed, as well as a process for the activation of such solid body surfaces by means of organo-silanes and, if necessary, homo- or heterobifunctional reagent. The surfaces are used for the stable, simple and economical binding of proteins, nucleic acids, low-molecular ligands, cells, microorganisms and other biological materials, in biology, biotechnology and medicine.

Abstract: A fluorine-containing coating agent which can be used for forming a fluorocarbon resin coating film on a substrate comprises a polymer which has a fluorine-containing polymer as a main chain and an alkoxysilyl group in the side chain and which is obtained by the reaction of a hydroxyl group of a fluorine-containing polymer having the hydroxyl group in the side chain with an isocyanato group of an alkoxysilane having the isocyanato group. The fluorine-containing polymer having a hydroxyl group in the side chain is a copolymer of a fluoro-olefin and a hydroxyalkyl vinyl ether having a straight or branched alkyl group having 2 to 5 carbon atoms. The alkoxysilane having an isocyanato group is a compound represented by the following formula:OCN(CH.sub.2).sub.3 SiX.sub.n R.sub.(3-n) (I)whereinR is hydrogen or a monovalent hydrocarbon group haviang 1 to 10 carbon atoms,X is an alkoxyl group having 1 to 5 carbon atoms, andn is an integer of 1 to 3.

Abstract: A polymer composition is provided comprising at least one poly(arylene sulfide), at least one polysiloxane, at least one trialkoxysilane, and at least one solid, resinous polyolefin. Molded objects made of this polymer composition have greater impact strength than those made of poly(arylene sulfide), preferably poly(phenylene sulfide). In one embodiment, an additive composition comprising at least one polysiloxane, at least one trialkoxysilane and at least one solid, resinous polyolefin is provided. The additives can be blended with poly(arylene sulfide) so as to improve its impact strength. In another embodiment, a polymer composition is provided comprising at least one poly(arylene sulfide), at least one polysiloxane having molecular in the range of from about 100,000 to about 400,000, and optionally at least one trialkoxysilane.

Abstract: Plasma-resistant polymeric materials are prepared by reacting a polymeric material containing reactive hydrogen functional groups with a multifunctional organometallic material containing at least two functional groups which are reactive with the reactive hydrogen functional groups of the polymeric material, such as hexamethylcyclotrisilazane.