Abstract: Novel methods for the preparation of polymers useful as precursors to ceramic materials by catalytic activation of Si--H bonds are disclosed. The methods comprise reacting, in the presence of a catalyst effective to activate Si--H bonds, Si--N bonds, or both, and/or a reactive solvent, a polymer in the form of a polysilane, polysilazane, polysiloxane or polycarbosilane with a reactant having the structural formula R--X--H, wherein X is NR' or O, R is H, organic, silyl, siloxyl, silazanyl or carbosilyl and may contain at least one additional X--H group, and R' is H, amino, silyl or silazanyl, to produce a modified polymer containing at least one Si--X bond. Polymers produced by these methods are also disclosed.

Abstract: A composition (comprising) an M-rich silicone and a catalyst is useful for de-polymerizing polymerized silicones thereby facilitating the recycle of electrical devices by enabling the removal of silicone coatings thereon.

Abstract: An organic electroluminescent display device (10) includes first and second electrode assemblies fabricated on a transparent substrates (12). Disposed between the electrode assemblies are one or more layers of organic electroluminescent light emitting materials (20). The organic electroluminescent light emitting material is preferably characterized by an emitted light having a wavelength of between 4000 .ANG. and 6000 .ANG.. This light emitting material may be comprised of a mixture of a first host emitting material and a second host emitting material, and may further include a dopant so as to improve the emission efficiency of the light emitting material as well as to adjust the emission characteristic to a desired specification.

Abstract: Novel rubber-modified rigid silicone resins are disclosed. The novel resins are the copolymerized reaction product of (A) an organosilicon composition selected from the group consisting (I) an organosilicone resin, (II) hydrolyzable precursors of (I), and an hydrolyzate of (II) and (B) an silicone rubber. The novel rubber-modified rigid silicone resins of the invention show remarkably high fracture toughness, K.sub.Ic, and critical strain energy release rate G.sub.Ic.

Abstract: A propylene resin composition containing talc, comprising the following components (a), (b) and (c) is provided: (a) 100 parts by weight of a propylene/ethylene block copolymer containing a crystalline propylene homopolymer part (Unit A part) and an ethylene/propylene random copolymer part (Unit B part); (b) 0.1 to 80 parts by weight of talc having an average particle size of 1.5 to 20 microns and an average aspect ratio of not less than 4; and (c) 2 to 80 parts by weight of an ethylene/.alpha.-olefin copolymer polymerized by using a metallocene catalyst, and containing an .alpha.-olefin having 3 to 16 carbon atoms. This composition has good paintability, molding processability (fluidity) and excellent mechanical strength balance, and is useful for a material for e.g., automobile parts.

Abstract: Silicone release agents comprising propenyl-ether functionalized silicones exhibit a rapid cationic induce photo-cure. Such propenyl-ether functionalized silicones are synthesized by the hydrosilation of various .alpha.-allyloxy-.omega.-(1-propenoxy) alkanes with various linear and cyclic hydrogen functional siloxanes.

Abstract: Describes a composition for producing durable coatings and a process for preparing a single-layer broad band antireflective coating on solid substrates, such as glass, ceramics, metals, and organic polymeric materials. The coating composition comprises, in combination, acid catalyzed hydrolysis and condensation products of water-silane monomer mixture and a film forming amount of a polymer having functional groups selected from amino, hydroxy and carboxy, hydroxy and amino, amino and carboxy, and amino, hydroxy and carboxy. The described process comprises applying the aforesaid coating composition (or an acid catalyzed sol-gel coating composition) substantially free of preformed oxide sol and water soluble metal salt to the surface of a solid substrate, curing the applied coating, and treating the cured coating with an aqueous electrolyte solution for a time sufficient to produce a coating having graded porosity which is antireflective over a broad band of the visible spectrum.

Abstract: An article that is capable of accepting and anchoring printed indicia and yet, maintains good release properties. The article of the present invention is coated with a release agent on a substrate such as paper. Release coatings receptive to toner particles emitted by electrophotoconductive devices comprise a polymer having at least one vinyl polymeric segment having a T.sub.g between -10.degree. C. and 65.degree. C. and at least one siloxane polymeric segment.

Abstract: Polymers containing a high percentage of vinyl alcohol units are difficult to process into sheet, film, injection-molded objects, or fibers. Such melt-processing is greatly enhanced by admixing certain hydrogenated block copolymers formed by sequential anionic polymerization of butadiene and styrene, followed by hydrogenation, then followed by grafting of maleic anhydride.

Abstract: Disclosed is a method of forming tamper-proof coatings on electronic devices. The method comprises applying a coating of a silica precursor resin and an inorganic salt onto the electronic device, wherein the inorganic salt is one which reacts with a wet etch to yield an acid or base that damages the electronic device. The coated electronic device is then heated at a temperature sufficient to convert the silica precursor resin to a silica containing ceramic matrix.

Abstract: A light scattering material is prepared by mixing with and dispersing in a transparent elastomer matrix particles of a transparent material. The matrix has a Tg of lower than room temperature and the transparent material has a different index of refraction form the matrix.

Abstract: In a process for producing poly(phenylene sulfide), in which an alkali metal sulfide is reacted with a dihalo-aromatic compound in an organic amide solvent, the reaction is conducted through the following Steps 1 and 2, thereby efficiently providing granular, high-molecular weight poly(phenylene sulfide) having excellent whiteness in a short period of time and at a high yield. Step 1: a step comprising reacting the alkali metal sulfide with the dihalo-aromatic compound within a temperature range of 170.degree.-270.degree. C. in the organic amide solvent containing water in a proportion of 0.5-2.0 moles per mole of the alkali metal sulfide charged while raising the reaction temperature at an average heating rate of 0.1.degree.-1.degree. C./min in at least a temperature range of from 220.degree. C. to 240.degree. C.

Abstract: A citrus scented cosmetic is described wherein citrus water distillate is substituted for some or all of the distilled and/or deionized water typically used as an ingredient in the cosmetic. Citrus water distillate is an economical, environmentally-friendly source of purified "soft" water which imparts a natural citrus odor to the cosmetic.

Abstract: The present invention relates to a method for preparing a polyisobutylene-siloxane block copolymer, said method comprising:(I) lithiating(A) a polyisobutylene having one or two terminal silanol groups with(B) an organolithium compound;(II) reacting the silanolate-functional polyisobutylene obtained in step (I) with(C) a hexaorganocyclotrisiloxane; and(III) capping the siloxanotate-functional block copolymer obtained in step (II) with a compound selected from(D) a silane having at least one hydrolyzable group or(E) an acid.

Abstract: Disclosed is a method for producing an acetal copolymer, which comprises copolymerizing trioxane with a cyclic ether in the presence of a cation-active catalyst, wherein the cyclic ether is obtained by adding to a fresh cyclic ether containing a peroxide derived therefrom in an amount of 15 ppm by weight or less in terms of hydrogen peroxide at least one sterically hindered phenol in an amount of from 10 to 500 ppm by weight, based on the weight of said fresh cyclic ether. By the method of the present invention, it has become possible not only to stably and efficiently produce an acetal copolymer having high thermal stability, but also to stably conduct a post-treatment of the obtained acetal copolymer for deactivating the remaining catalyst and changing the unstable terminals to stable terminals, so that an ultimate acetal copolymer having high thermal stability can be stably obtained.

Abstract: A method of obtaining fine-grained, free-flowing powdered silicone resins is disclosed. The powdered silicone resins contain very low or no residual aromatic solvents or other volatile organic compounds. The method includes the steps of (1) preparing a solution of an MQ silicone resin dissolved in a volatile liquid organosilicon solvent, such as hexamethyldisiloxane, and (2) spray-drying the solution obtained in step (1) to produce the silicone resin powder.

Abstract: A thermoplastic resin composition is disclosed, which comprizes 5-55 weight % of a copolymer (A) whose glass transition temperature is not more than 0.degree. C., and 95-45 weight % of a high .alpha.-methylstyrene-content ABS resin (B) and/or a maleimide-type ABS resin (C), both (B) and (C) being not less than 100.degree. C. in thermal deformation temperature (load 18.6 kg/cm.sup.2), and said resin composition being not less than 10 kg.cm/cm in Izod impact strength (23.degree. C.). The resin composition provides molded articles less deformable at high temperatures, low in impact-induced stress, i.e, high in impact energy absorptivity, and thus is suitable for trim parts for use in interior decoration of automobiles.

Abstract: A silicone gel-like material having a reduced content of extractable silicone fluid and having rheological properties approximating human tissue. The gel-like material or "pseudogel" is useful for filling an implantable prosthesis. Prior art silicone gel-filled prosthetic implants contain a high proportion of extractable free silicone fluid. The free silicone fluid within an implant may enter the host's body by diffusion through the prosthetic shell or by rupture of the outer envelope of the prosthesis. The present filler material, or pseudogel, is produced by controlling the cross-linking of the silicone polymer network such that every polymer chain contains only terminal reactive vinyl groups but not all of the reactive groups participate in the cross-linking reaction. In a preferred embodiment, the polymeric vinyl-terminated starting fluids are selected so that the average molecular weights of the polysiloxane polymers comprising the fluid fall into two or three distinct ranges.

Abstract: Water-soluble graft polymers are described which have been produced bya) radical grafting of a polyalkylene oxide of the general formula I ##STR1## in which R.sup.1 =--H, --C.sub.n H.sub.2n+1, --C.sub.6 H.sub.4 --C.sub.n H.sub.2n+1, ##STR2## --(CH--R.sup.2).sub.m NHR.sup.2, --(CH--R.sup.2).sub.m OH, --(CH--R.sup.2).sub.m --COOH, --CO--R.sup.5R.sup.2 =--H, --CH.sub.3, --C.sub.2 H.sub.5R.sup.3 =--H, --C.sub.n H.sub.2n+1, --C.sub.m H.sub.2m --SO.sub.3 Na, --(CH--R.sup.2).sub.m NHR.sup.2, --(CH--R.sup.2).sub.m OH, --(CH--R.sup.2).sub.m --COOH, --CO--R.sup.5R.sup.4 =--H, --(CH--R.sup.2).sub.m --COOH, --CO--R.sup.5R.sup.5 =--C.sub.m H.sub.2m+1, --C.sub.6 H.sub.5, --(CH--R.sup.2).sub.m --COOH, --C.sub.6 H.sub.4 --COOHn denotes 1-18, m denotes 1-5, x denotes 2-200, y denotes 0 or 1with an ethylenically unsaturated mono or dicarboxylic acid or their anhydride and subsequentlyb) derivatising with a primary or secondary amine and/or alcohol.

Abstract: A kit for the production of rapidly-hardening aminosilane cross-linking silicone masses including:(A) 100 parts by weight of an at least bifunctionally terminated diorganopolysiloxane, which include a linear or branched chain of repeating units of the formula ##STR1## and which contains at least two end groups Z, wherein Z is --H, --OH, OR.sup.l or --SiR.sup.3 (NR.sup.4 R.sup.5).sub.2, and R.sup.l and R.sup.2 are independently a saturated or unsaturated hydrocarbon radical, optionally substituted with halogen or cyano groups,(B) 0.1 to 20 parts by weight of an aminosilane cross-linker of the general formulaR.sup.3.sub.y --Si--(NR.sup.4 R.sup.5).sub.4-ywherein y=0 or 1,R.sup.3 is hydrogen or a monovalent saturated or unsaturated hydrocarbon or hydrocarbonoxy radical, andR.sup.4 and R.sup.5 are independently selected from hydrogen and saturated or unsaturated aliphatic, cycloaliphatic, or aromatic hydrocarbon radical with 1 to 15 carbon atoms, optionally substituted with halogen or cyano groups,(C) 0.