Abstract: Provided is a heat conductive silicone grease composition, including: (A) 100 parts by volume of an organopolysiloxane of a specific structure with a kinematic viscosity at 25° C. within a range from 10 to 100,000 mm2/s, (B) 0.1 to 50 parts by volume of an organopolysiloxane that functions as a wetter and contains a triorganooxysilyl group bonded to one terminal via an alkylene group that may be branched, and (C) 100 to 2,500 parts by volume of a heat conductive filler. The composition exhibits high thermal conductivity, displays excellent initial fluidity and is capable of retaining that fluidity over an extended period, and exhibits excellent heat radiation performance. Heat generated by a heat-generating body can be dissipated into a heat-radiating body by sandwiching the composition between the heat-generating body and the heat-radiating body.

Abstract: A curable silicone resin composition is provided. It includes (A) an aromatic ring-containing hydrocarbon compound containing at least 2 silicon-bonded hydrogen atoms, in which the silicon atoms are bonded to the hydrocarbon skeleton; (B) an organopolysiloxane with a branched or three dimensional network structure, and with a viscosity at 25° C. of at least 1,000 mPa·s, having an average composition formula (1): R1xSiO{(4?x)/2}??(1) wherein, R1 independently represent a substituted or unsubstituted monovalent hydrocarbon group, a substituted or unsubstituted hydrocarbyloxy group, or a hydroxyl group, provided from 0.1 to 80 mol % of all the R1 groups are alkenyl groups, and x represents a positive number that satisfies 1?x<2; and (C) a hydrosilylation reaction catalyst. The composition yields a cured product that is transparent and displays excellent hardness and flexural strength.

Abstract: A composite resin which has been produced by hydrolyzing and condensing a silane compound (2) containing a bissilane compound (B) represented by: XnR3-nSi—Y—SiR3-nXn ??(B) wherein Y is a divalent organic group which is optionally substituted with a fluorine atom or a divalent organic group which optionally contains an aromatic ring, R is a monovalent organic group, X is OH group or a hydrolyzable group, and n is 1, 2, or 3; in the presence of (1) porous and/or hollow inorganic oxide fine particles (A); and which is an integral mixture of component (1) and component (2) which has undergone the hydrolysis and the condensation. The composite resin of the present invention has voids in the resin since it contains porous and/or hollow inorganic oxide fine particles, and the composite resin of the present invention can also be formed into a cured article or a cured coating with reduced refractive index since it contains air which has the lowest refractive index.

Abstract: An antireflective coating having improved alkali resistance is formed on a transparent substrate of synthetic resin as an outermost layer and has a three-dimensional crosslinked structure containing F and Si atoms. The crosslinked structure is composed of Si—O—Si and Si—C2H4—(CF2)n—C2H4—Si linkages wherein n is 4 or 6; the molar ratio of F atoms to Si atoms is from 8.0 to 10.0; and perfluoroalkyl groups account for 90 to 100 mol % of all monovalent organic substituent groups attached to silicon atoms. The antireflective coating can exhibit such alkali resistance that when a droplet of a 1 wt % NaOH aqueous solution is rested on the antireflective coating for 30 minutes and then wiped off, the appearance of the coating is kept unchanged from the initial appearance.

Abstract: An asymmetric siloxane is made by reacting a silicone having the formula MHDxM?H where MH is R1R2HSiO1/2, M?H is R4R5HSiO1/2 and x is an integer 0?x?10 under selective hydrosilylation conditions in the presence of a precious metal hydrosilylation catalyst, with a first olefine compound and in a second step, a monohydridosiloxane produced in the first step is reacted under hydrosilylating condtions with another olefine compound different from the first olefine compound.

Abstract: A cross-linkable and cross-linked organosilicon polymer which is prepared from a mixture of a reactive polysiloxane resin having both reactive carbon-carbon double bonds and silicone-hydrogen groups, characterized by alternating structures of polycyclic polyene residue and cyclic (or tetrahedral) polysiloxane residue, and either vinyl terminated fluorine-containing polysiloxane or vinyl terminated phenyl-substituted siloxane. In an alternative embodiment, the polymer comprises a mixture of vinyl terminated phenyl-substituted polysiloxane and vinyl functional fluorosilicone elastomer with the cross-linkable and cross linked organosilicon polymer.

Abstract: A block of intermediate transfer material for use in a printing apparatus having an intermediate transfer member, said intermediate transfer member being equipped with a heater to heat said intermediate transfer member to a temperature of at least about 40° C., said intermediate transfer member having a surface with a first shape, a marking material applicator situated to apply marking material in an imagewise pattern to the intermediate transfer member, and a transferring apparatus to transfer the imagewise pattern of marking material to a final recording substrate, said block of intermediate transfer material comprising a silicone polymer containing monomers of the formula wherein R1, R2, R3, R4, R5, x, y, and z are as defined herein, wherein the monomers can be directly bonded to each other or bonded through spacer groups, said block of intermediate transfer material having a surface with a second shape substantially the complement of the first shape.

Abstract: A coating composition primarily comprising a disilane compound of the formula (A): XmR13?mSi—Y—SiR13?mXm??(A) wherein R1 is a monovalent hydrocarbon group, Y is a divalent fluorinated organo group, X is a hydrolyzable group, and m is 1, 2 or 3, or a (partial) hydrolyzate thereof is applied and cured to form a protective coat having excellent chemical resistance and antireflection.

Abstract: The present invention provides relates to a crosslinkable, proton-conducting membrane having a crosslinked structure, excellent in heat resistance, durability, dimensional stability and fuel barrier characteristics, and showing excellent proton conductivity at high temperature, characterized by comprising (a) an organic/inorganic hybrid structure (A) covalently bonded to 2 or more silicon-oxygen crosslinks and, at the same time, having a carbon atom, and (b) an acid containing structure (B) having an acid group, covalently bonded to a silicon-oxygen crosslink and having an acidic group; and provides a fuel cell using the same membrane.

Abstract: A cross-linkable and cross-linked organosilicon polymer which is prepared from a mixture of a reactive polysiloxane resin having both reactive carbon-carbon double bonds and silicone-hydrogen groups, characterized by alternating structures of polycyclic polyene residue and cyclic (or tetrahedral) polysiloxane residue, and either vinyl terminated fluorine-containing polysiloxane or vinyl terminated phenyl-substituted siloxane. In an alternative embodiment, the polymer comprises a mixture of vinyl terminated phenyl-substituted polysiloxane and vinyl functional fluorosilicone elastomer with the cross-linkable and cross linked organosilicon polymer. In an alternative embodiment, the polymer comprises vinyl functional polydimethyl siloxane, and preferably high molecular weight methyl divinyl siloxane, with or without phenyl substituted siloxane.

Abstract: Disclosed herein are silicone resins comprising structural units of the formulae: and at least one structural unit selected from the group consisting of: where “A” is a spacer group comprising C2 to C50 alkyl groups; “B” and “C” are spacer groups comprising C2 to C20 alkyl groups; “M1” comprises a Group III element; R1, R3, R6, and R7 independently comprise OH, alkyl groups, or alkoxy groups; R2 and R4 independently comprise hydrogen, alkali metal, or alkyl groups; and R5 comprises a alkyl group. Methods for preparing these silicone resins are also disclosed. The silicone resins are useful as catalysts for producing bisphenols.

Abstract: A proton conducting polymer is formed by the copolymerization of a plurality of compounds, including a silicon compound comprising an organic chain, and a compound including at least one acid group. The polymer comprises a hybrid organic-inorganic matrix having acid groups linked through a linking group. The linking group may include one or more electron withdrawing groups. The electron withdrawing group may be a halogen.

Abstract: The curable composition of the present invention contains (A1) a silyl-containing ethylene/?-olefin/non-conjugated polyene random copolymer rubber which has a structural unit derived from a norbornene compound as the non-conjugated polyene with at least one specific vinyl group at the terminal and contains a specific hydrolyzable silyl group, and (B) a compound, other than the rubber (A1), having a hydroxyl group and/or a hydrolyzable group, e.g., (B1) a compound having a silanol group and/or a compound which can react with moisture to form a compound having a silanol group in the molecule. This compound improves elongation of the cured product and residual surface tackiness, and, at the same time, is high in curing speed and capable of giving the cured product of high resistance to weather. It is suitable for, e.g., adhesives, tackifiers, paints, sealants, waterproof materials, spray materials, shaping materials and casting rubber materials.

Abstract: The present invention provides a composition for preparing porous dielectric thin films containing pore-generating material, said composition comprising gemini detergent, and/or a quaternary alkyl ammonium salt, a thermo-stable organic or inorganic matrix precursor, and solvent for dissolving the two solid components. There is also provided an interlayer insulating film having good mechanical properties such as hardness, modulus and hydroscopicity, which is required for semiconductor devices.

Abstract: Multi-layered macromolecules wherein the layers are covalently bonded together and wherein the macromolecules are covalently bonded to solid particulate substrates, methods for the preparation of such compositions, and methods for their uses in a multitude of end use applications ranging from the purification of waste chemical and metal process streams to the separation and identification of proteins, peptides, and oligionucleotides.

Abstract: One-component, moisture curing compositions which exhibit rapid curing, even with exceptionally low levels of catalyst or with no catalyst at all, can be formulated from alkoxysilane-terminated polymers having alkoxysilane groups bonded to an electronegative, free electron-pair-containing heteroatom via a methylene linking group. Polymer blends containing the alkoxysilane-terminated polymers exhibit rapid cure, even at room temperature, and allow the use of nitrogen containing components such as adhesion promoters.

Abstract: A room temperature fast-curable saturated hydrocarbon polymer composition comprising (A) a saturated hydrocarbon polymer having at least one hydrolyzable silyl group and a Mn of 500 to 50,000, (B) a ?-dicarbonyl compound, and (C) an amino-bearing organic compound, wherein the ?-carbonyl group in component (B) is reactive with the amino group in component (C), is dramatically improved in fast-cure and deep-cure capabilities without sacrificing adhesion and electrical properties after water immersion.

Abstract: A water-repellent film that is formed on a solid substrate includes: a molecule (A) including at least one or more of siloxane bonding (—Si—O—) at both ends and a hydrocarbon chain in a middle part; and a molecule (B) including a fluorocarbon chain at one end and at least one or more of siloxane bonding (—Si—O—) at another end, wherein a polymer film is formed at least with the molecule (A) and the molecule (B). This polymer film forms a covalent bond with a surface of the substrate via siloxane bonding (—Si—O—), and the surface thereof is covered with fluorocarbon chains having high water repellency. Therefore, this film prevents the intrusion of alkali ions. Thereby, an ink jet head and an ink jet type apparatus having a water-repellent film that is not destroyed by the long-term contact with alkaline ink can be provided.

Abstract: A curable composition is characterized by comprising an organic polymer having at least one silicon-containing group which has a hydroxy or hydrolyzable group bonded to the silicon atom and which is crosslinkable by forming siloxane bonds, and a specific metal salt of a carboxylic acid. The composition ensures practical curability and recovery properties and has mechanical properties including high strength and high elongation.

Abstract: A siloxane-based resin having a novel structure and a semiconductor interlayer insulating film using the same. The siloxane-based resins have a low dielectric constant in addition to excellent mechanical properties and are useful materials in an insulating film between interconnecting layers of a semiconductor device.

Abstract: This invention provides a primer composition comprising the following (A), (B), (C) and (D) components: (A) a saturated hydrocarbon polymer having at least one alkenyl group per molecule, (B) a silane coupling agent, (C) a polyvalent alkoxysilane and/or a condensation product thereof, and (D) an organoaluminum compound and/or an organotitanium compound.

Abstract: Alkoxysilane-terminated polymers prepared by reacting an isocyanatoalkoxysilane, preferably an isocyanatodialkyalkoxysilane, with an isocyanate-reactive prepolymer, can provide chain extension even when a monoalkoxy-functional silane, while retaining suitable reactivity profiles. The products are useful in sealants, caulks, coatings, and moldings.

Abstract: A siloxane-based resin having germanium and an interlayer insulating film for a semiconductor device formed using the same. The siloxane-based resins have a low dielectric constant in addition to excellent mechanical properties so that they are useful materials for an insulating film between interconnecting layers of a semiconductor device.

Abstract: The invention pertains to polysiloxane polymers, methods for their production, and their use as wash resistant hydrophilic softeners.

Abstract: The present invention discloses articles containing a coating composition, as well as methods of making and using the compositions which, when applied to a substrate and cured, provide articles having transparent abrasion resistant coatings, wherein the coatings have a matched refractive index to that of the substrate and can be tailored to control the extent of tint absorption (vide infra). The coating compositions comprise an aqueous-organic solvent mixture containing a mixture of hydrolysis products and partial condensates of an epoxy-functional silane, a carboxylic acid functional compound selected from the group consisting of carboxylic acids, multifunctional carboxylic acids, anhydrides, and combinations thereof, a metal oxide composite colloid, and a disilane. The coating compositions may further include a mixture of hydrolysis products and partial condensates of one or more silane additives, a colloidal silica material, and a tetrafunctional silane.

Abstract: Disclosed herein are a siloxane-based resin having novel structure and an interlayer insulating film for a semiconductor device formed using the same The siloxane-based resins have so low dielectric constant in addition to excellent mechanical properties, heat-stability and crack-resistance that they are useful materials for an insulating film between interconnect layers of a semiconductor device.

Abstract: A process for providing a coating composition which, provides an abrasive resistant coating having a refractive index of the substrate and controlled tintability. The composition which, when applied to at least one surface of a substrate comprises an aqueous-organic solvent mixture containing a mixture of hydrolysis products and partial condensates of an epoxy-functional silane, a carboxylic acid functional compound selected from the group consisting of carboxylic acids, multifunctional carboxylic acids, anhydrides, and combinations thereof, a metal oxide composite colloid, a disilane and an effective amount of a leveling agent for permitting the aqueous-organic mixture to spread on the substrate and thereby provide substantially uniform contact of the aqueous-organic mixture with the substrate. The coating compositions may further include a mixture of hydrolysis products and partial condensates of one or more silane additives, a colloidal silica material, and a tetrafunctional silane.

Abstract: The present invention generally relates to a polyhydric alcohol-modified silicone having the formula (I): R1aR2bR3cSiO(4-a-b-c)/2 wherein the variables are defined herein.

Abstract: Compounds that include silicon-containing groups, and optionally urethane groups, urea groups, or combinations thereof (i.e., polyurethanes, polyureas, or polyurethane-ureas), as well as materials and methods for making such compounds.

Abstract: A curable composition comprising: (A) a branched polyfluorodialkenyl compound represented by a general formula (1): CH2?CH—(X)a-Rf1-(X?)a—CH?CH2??(1) wherein, X and X? are bivalent groups such as —CH2— and —CH2O—, a represents, independently, either 0 or 1, and Rf1 is a specific bivalent fluorine-containing group, (B) a branched polyfluoromonoalkenyl compound represented by a general formula (2): Rf2-(X?)a—CH?CH2??(2) wherein, X? and a are as defined above, and Rf2 is a specific fluorine-containing group, (C) an organohydrogensiloxane compound with at least two hydrogen atoms bonded to silicon atoms, and (D) a platinum group metal catalyst; as well as a low bleeding gel type cured product obtained by curing such a composition, and an electrical or electronic component sealed or encapsulated using such a cured product. The gel type cured product displays very little bleeding of free oil constituents from the gel as a result of stress such as pressure fluctuation or heat history.

Abstract: A silicon-containing copolymer which comprises units represented by the general formulae (I) and (II) as essential units and ones represented by the general formulae (III) to (VII) as optional units and has a number average molecular weight of 500 to 1,000,000, —(—R1R2Si—A —)p—??(I) —(—R3R4Si—R7—SiR5R6—)q—??(II) —(—R8Si—A—)r—??(III) —(—R9(H)Si—A—)s—??(IV) —(—R1R2Si—NH—R10—NH—)t—??(V) —(—R8Si—NH—R10—NH—)u—??(VI) —(—R9(H)Si—NH—R10—NH—)w—??(VII) wherein A is NH or oxygen, the proportions of these satisfying the relationship 0.01?Si—O/(Si—N+Si—O)?0.99.

Abstract: A conductive paste based on an elastomer of the polyoxypolyolefin type or on a member of the polyolefin family is described, provided with an admixture of conductive particles for the production, in the electronics industry, of a sealing element, of a contact element or of a heat-conduction element. This material is particularly suitable for the production of EMI-RFI gaskets, and, compared with materials known hitherto and based on silicone, has improved performance characteristics and environmental properties.

Abstract: The present invention relates to polymers of poly(ethynylene phenylene ethynylene silylene) type comprising an inert spacer in the main chain of the polymer. The invention also relates to processes for preparing said polymers and to the cured products that may be obtained by heat-treating said polymers. The polymers according to the invention may be used especially in matrices for composites.

Abstract: The present invention provides a coating composition comprising: A coating composition comprising: TEOS; a surfactant; at least one organosilane; HCl; water; and ethanol. The present invention also provides films made from such a coating composition and a method for making such films.

Abstract: Disclosed are abrasion and impact resistant coating compositions, and substrates coated therewith. These coating compositions provide high abrasion and impact resistance, chemical protection to the substrate, and exhibit enhanced stability to high temperature and high humidity conditions. Coating compositions may also be tailored to provide a balanced combination of abrasion resistance, impact resistance, and weatherability. These coatings may be transparent or not, depending on the intended applications. These coatings may also comprise additives such as UV absorbers, corrosion inhibitors, and electrically conductive materials. Substrates for use herein may be plastic or metal.

Abstract: A room-temperature curable organopolysiloxane composition is provided, which includes (A) an organopolysiloxane with the terminals blocked with a hydroxyl group, a hydrolysable group, or both these types of groups, and (B) an organosilicon compound containing a hydrolysable group, a partial hydrolysis-condensation product thereof, or a mixture of the two, and (C) a polysiloxane containing an oxyalkylene group bonded to a silicon atom via, for example, a C—C—Si linkage. Application of this composition to an underwater structure is able to generate an antifouling coating that is effective in preventing the adhesion and growth of aquatic organisms on the surface of the underwater structure, and displays superior long term endurance of this antifouling effect.

Abstract: A process for inhibiting the fouling of a substrate in a marine fouling environment, which comprises forming on the substrate, before exposure to the said environment, a coating comprising a curable fluorinated resin of the general formula: W-L-YFC—O—Rf—CFY-L-W wherein: W is a group of the general formula —Si(R1)?(OR2)3-?, wherein ?=0, 1, or 2, preferably ?=0, R1 and R2 independently have the meaning of linear of branched C1-C6 alkyl groups, optionally containing one or more ether groups, or C7-C12 aryl or alkyl groups, and preferably R1 and R2 are C1-C4 alkyl groups; L is an organic linking group; Y is F or CF3; and Rf is a group having an average molecular weight by number between 350 and 8000, preferably between 500 and 3000, and comprising repeating units having at least one of the following structures randomly distributed along the chain: —CFXO—, CF2CF2O—, CF2CF2CF2O—, CF2CF2CF2CF2O—, CR4R5CF2CF2O—, —(CF(CF3)CF2O)—, —CF2CF(CF3)O—, wherein X is F or CF3, R4 and R5 independently have the meaning of H, Cl,

Abstract: A room temperature curable organopolysiloxane composition comprising (A) an organopolysiloxane having organooxysilyl groups on side chains or on side chains and ends of the polymer, (B) fumed silica, (C) an organooxysilane or a partial hydrolytic condensate thereof, and (D) a condensation catalyst is improved in stability during storage under sealed conditions and cures into an elastomeric product whose physical properties change little even when used under rigorous conditions as encountered in proximity to automotive engines.

Abstract: An organosiloxane polymer comprising recurring units of the general formula (1) and having a weight average molecular weight of 1,000-500,000 is novel. R1 to R4 are monovalent hydrocarbon groups, n is an integer of 1-2,000, X has a structure of the formula: and R5 is an acrylic functional organic group of the formula: wherein R? is H or methyl and R? is a divalent hydrocarbon group. A photo-curable resin composition comprising the organosiloxane polymer and a sensitizer can be cured with a wide wavelength range of light.

Abstract: The invention relates to compositions used for aqueous delivery of self-emulsifying fluorinated alkoxysilanes to substrates to provide oil and water resistive coatings for the substrates, a method of treating a substrate to render it oil and water repellent, and articles having coatings made from the compositions.

Abstract: Disclosed are stable organo polysilica resin composition containing a B-staged organo polysilica resin and an organic acid, methods of stabilizing such B-staged organo polysilica resin compositions and methods of manufacturing electronic devices using such stable compositions.

Abstract: The invention relates to soluble organic-inorganic compositions comprising linear and cyclic hydrosiloxanes, to a novel process for preparing them and to their use as coating materials.

Abstract: A cross-linkable and cross-linked organosilicon polymer which is prepared from a mixture of a reactive polysiloxane resin having both reactive carbon-carbon double bonds and silicone-hydrogen groups, characterized by alternating structures of polycyclic polyene residue and cyclic (or tetrahedral) polysiloxane residue, and either vinyl terminated fluorine-containing polysiloxane or vinyl terminated phenyl-substituted siloxane. In an alternative embodiment, the polymer comprises a mixture of vinyl terminated phenyl-substituted polysiloxane and vinyl functional fluorosilicone elastomer with the cross-linkable and cross linked organosilicon polymer.

Abstract: A (poly)oxyalkylene block silyl ester copolymer comprising silyl ester copolymer block units (A) and block units (B), the block units (a) comprising (a) component units derived from a polymerizable unsaturated carboxylic acid silyl ester, and (b) polymerizable unsaturated monomer units other than the component units (a), the block units (B) derived from particular mercapto compounds, and an antifouling paint comprising the (poly)oxyalkylene block silyl ester copolymer. The copolymer enables the formation of an antifouling coating film which exhibits less cracking tendency, excellent adherence, less peeling tendency and controlled hydrolysis rate resulting in excellent antifouling performance and properties.

Abstract: Condensation curable poly(fluoroorgano)siloxane-poly(silarylene)siloxane block copolymer compositions having a glass transition temperature not exceeding about −54° C. and excellent solvent resistance have been found useful as sealants. Polyalkoxysilylorgano compounds, such as 1,4-bis[trimethoxysilyl(ethyl)]benzene have been found to be effective as cross-linkers.

Abstract: The cross-linked hydrosilylation reaction product of an alkenyl functional silicone compound, a silylhydride functional silicone compound, and one or more allyl started, hydrogen, alkyl, aryl or acyl terminated polyether compounds exhibits stability, compatibility with polar organic solvents and is useful as a component in personal care compositions.

Abstract: A coating material for interior walls and exterior facades has heat reflection and oleophobicity/hydrophobicity, properties. The material is either opaque to visible light and/or contains a material which provides opacity. It includes: a) at least one silane of the formula (I) XaRbSiR14−a−b  (I)  in which X is a hydrolyzable group, R is optionally substituted alkyl, alkenyl, aryl, alkylaryl or arylalkyl, R1 is an organic radical which is attached to the silicon via carbon and carries a reactive group, a is an integer from 1 to 3, and b is an integer from 0 to 2, or a (partial) condensate of this silane, b) at least one infrared-reflecting pigment whose particle size is situated primarily in the range from 1 to 50 &mgr;m, and c) a solvent and/or dispersion medium.

Abstract: The invention comprises a networked polymer comprising the formula: wherein n≧1; wherein n is an average value obtained by averaging all repeating units of the networked polymer; wherein m≧1; wherein Y is a divalent group containing one or more acetylenic groups, one or more crosslinks, or both; wherein z is the average number of crosslinks per Y group; wherein Ar1 and Ar2 are independently selected aromatic groups; and wherein each R is independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl, and combinations thereof. The invention also includes prepolymers and precursors needed to make the networked polymer and processes for making all of the above. The invention also includes a ceramic composition made by pyrolysis of the networked polymer.

Abstract: A linear polymer has repeating units represented by the formula wherein (a) n is an integer greater than or equal to 0, (b) x is an integer greater than or equal to 1, and ?represents an unconjugated acetylenic group when x is equal to 1 or conjugated acetylenic groups when x is greater than 1; (c) Ar is an aromatic group, and (c) R1, R2, R3, R4, R5, R6, R7 and R8 are independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl, and mixtures thereof. The linear polymer may be thermally cured to form a crosslinked polymer.

Abstract: A linear polymer has repeating units represented by the formula wherein (a) n is an integer greater than or equal to 0, (b) x is an integer greater than or equal to 1, and ?represents an unconjugated acetylenic group when x is equal to 1 or conjugated acetylenic groups when x is greater than 1; (c) Ar is an aromatic group, and (c) R1, R2, R3, R4, R5, R6, R7 and R8 are independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl and mixtures thereof. The linear polymer may be thermally cured to form a crosslinked polymer.