Abstract: Curable compositions containing novel polysiloxanes having various reactive functional groups are disclosed. The curable compositions are useful as both ambient-cured and thermally-cured coating compositions which provide such properties as excellent appearance, mar resistance, acid etch resistance, adhesion, pot life, improved tack time, mar resistance and corrosion resistance.

Abstract: Dendritic polymer based networks consisting of well-defined hydrophilic and oleophilic (i.e., hydrophobic) domains, are capable of performing as nanoscopic sponges for electrophilic guest moieties such as (i) inorganic and organic cations; (ii) charged or polarized molecules containing electrophilic constituent atoms or atomic groups; and (iii) other electrophilic organic, inorganic, or organometallic species. As a result of such performance, the networks yield novel nanoscopic organo-inorganic composites which contain organosilicon units as an integral part of their covalently bonded matrix.

Abstract: Disclosed is a blend capable of forming a semi-interpenetrating network when cured of (A) a solution of about 30 to about 50 wt % solids in an organic solvent of a fully imidized polyimidesiloxane and (B) about 5 to about 30 pbw per 100 pbw of the polyimidesiloxane of an epoxy resin which comprises a cycloaliphatic epoxy and an epoxy curing agent. The polyimidesiloxane is the reaction product of an aromatic dianhydride and diamine. The diamine is about 5 to about 80 mole % non-siloxane containing aromatic diamine and the remainder a siloxane diamine, where the siloxane diamine is about 40 to about 80 wt % of the weight of the polyimidesiloxane. The blend is used to bond metal parts to ceramic packages.

Abstract: Packaging material prepared from a paper or paperboard substrate which includes a layer of moisture barrier material is made resistant to loss of its moisture barrier characteristics when the packaging material is scored and bent during any converting operation by the addition of a layer of flexible primer material located between the paper or paperboard substrate and the moisture barrier layer.

Abstract: The present invention relates to mixtures, containing A) reaction products from isocyanates and NCO-reactive silanes and B) carbosilane dendrimers, a process for preparing powder coatings from the mixtures and their use.

Abstract: A method of thickening solvents involves reacting (A) an .tbd.Si--H containing polysiloxane with (B) an alpha, omegadiene; conducting the reaction in the presence of a platinum catalyst and (C) a solvent; continuing the reaction until a gel is formed by crosslinking and addition of .tbd.Si--H across double bonds in the alpha, omega-diene; adding additional solvent and a post cure quenching agent to the gel; and subjecting the solvent, the post cure quenching agent, and the gel to shear force until a paste is formed.

Abstract: A composition comprising the hydrosilylation addition product of a linear alkenyl functionalized polyorganosiloxane and an M.sup.H Q resin and a low molecular weight silicone when subjected to a new particle size reduction process that includes flow induced shearing provides for components in personal care formulations that have improved spreadability and substance as a consequence of a unique particle size distribution.

Abstract: This invention relates to 1,2-diol functional polysiloxane emulsions obtained by a variety of polymerization methods. This invention further relates to an organopolysiloxane emulsion comprising an organopolysiloxane polymer having pendant organic diol groups, at least one nonionic surfactant, at least one anionic surfactant, and water. The emulsions of this invention are useful as fiber treatment agents and provide softness and hydrophilicity to fibers treated with the emulsion.

Abstract: A room temperature curable fluoropolymer composition is provided which comprises (A) a straight chain fluoropolymer compound containing, in its backbone chain, at least one structure selected from a perfluoroalkylene structure and a perfluoropolyether structure and having a hydrolyzable silyl group at both ends of its molecular chain, (B) an organic compound having at least one carbonyl group per molecule, and (C) one compound selected from (C-1) an organic compound having at least one primary amino group per molecule and (C-2) a compound having at least one proton per molecule and having an acid dissociation constant (pKa) in water of 2 or less. Another room temperature curable composition is also provided which comprises said (A) component, (B') an organosilicon compound having at least two silanol groups per molecule, and (C') a condensation accelerator.

Abstract: This invention relates to resin solution compositions for electronic materials consisting of organic solutions of 100 parts by weight of siloxanepolyimidepolyamic acid copolymers composed of imide segments formed by polycondensation of aromatic tetracarboxylic acid dianhydrides and siloxanediamines and amic acid segments formed by polyaddition of aromatic tetracarboxylic acid dianhydrides and aromatic diamines other than siloxanediamines and represented by the following general formula (1) (in which X is the residue of an aromatic tetracarboxylic acid dianhydride, Y is the residue of a siloxanediamine, Z is the residue of an aromatic diamine, l and m are integers independent of each other, and n is an integer of 1 or more) and 1 to 50 parts by weight of epoxy resins. The compositions are storage-stable and curable at relatively low temperature and yield cured products with an excellent balance of heat resistance, high-frequency characteristics, chemical resistance and stress relaxation characteristics.

Abstract: A film-formable emulsion type silicone composition for an air bag, which comprises the respective amounts of colloidal silica-silicone core shell material comprising 80% to 5% by weight of a core comprising colloidal silica (A)(a) and 20% to 95% by weight of a shell comprising a particular polyorganosiloxane containing an ethylenically unsaturated group (b), a particular polyorganohydrogensiloxane (B), a curing catalyst (C), an emulsifying agent (D), and water (E), is disclosed. The composition can form an elastomeric substance having excellent adhesive properties to air bag base cloth, gas tightness, and mechanical strength on an air bag base cloth by removing water therefrom.

Abstract: A composition comprises a leachable organic compound distributed throughout a polymer matrix formed by reacting a fluoroepoxy compound of the formula: ##STR1## wherein x is an integer from 0 to 12, with a silicone amine curing agent of the formula: ##STR2## where n is the average degree of polymerization of the silicone amine curing agent and is 1 or greater. The leaching rate of the leachable organic compound is controlled by selecting the value of x in the fluoroepoxy compound and the value of n in the silicone amine curing agent. The composition may be used as a coating for protecting underwater substrates from fouling by marine organisms.

Abstract: A silylated polymethylsilsesquioxane, that contains no more than 0.12 residual silanol per Si atom and has a predetermined number average molecular weight from 380 to 2,000 is obtained by silylating the silanol in a starting polymethylsilsesquioxane with the formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.mwherein m and n are positive numbers that provide the specified molecular weight and 0.034/(M.times.10.sup.-3).ltoreq.m/(m+n).ltoreq.0.152/(M.times.10.sup.-3)+ 0.10. The silylated polymethylsilsequioxanes of the present invention exhibit compatibility with silicone polymers, e.g., polydimethylsiloxanes. As a consequence, the silylated polymethylsilsesquioxanes of the invention can be used in a wide range of applications as, for example, a reinforcing filler for rubbers.

Abstract: Room temperature vulcanizable coating compositions, useful as anti-fouling coatings for marine structures such as ships, are prepared by a method comprising the steps of first blending a particulate reinforcing filler such as silica with a non-reactive polyorganosiloxane oil under high shear conditions, and subsequently combining the resulting masterbatch with at least one reactive polyorganosiloxane having a relatively low viscosity, a condensation catalyst and a crosslinking agent. The resulting compositions are sprayable in the absence of solvents, although solvents may be added if desired.

Abstract: A medical device for partial insertion into a patient and navigating passageways, channels, canals, cavities, and other interior parts of said patient, said medical device comprising an elongate body having an in the body segment which, in normal use, is inserted in the body of a patient. At least a portion of the in-the-body segment is provided with a lubricious coating. The coating displays a gradient of lubricity along the length of thereof.

Abstract: Dendrimer-based networks are prepared from copolydendrimer precursors having well defined hydrophilic polyamidoamine (PAMAM) or polypropyleneimine (PPI) interiors, and organosilicon outer layers ending with .tbd.Si--OCH.sub.3 surface groups. These networks have precisely controllable size, shape, and spatial distribution, of nanoscopic hydrophilic and hydrophobic domains. Such constructs are prepared by crosslinking one type of copolydendrimer precursor, or by crosslinking mixtures of different copolydendrimers having different generations of PAMAM or PPI dendrimers in the interior, surrounded by different organosilicon exteriors. Crosslinking can be controlled by adding difunctional, trifunctional, or polyfunctional low molecular weight or oligomeric crosslinking agents; or by exposing a copolydendrimer having hydrolyzable surface groups to atmospheric moisture. Elastomeric dendrimer-based networks have low glass temperatures of -15.degree. C.

Abstract: A curable composition which comprises (A) an organosilicon compound having at least one silicon-bonded alkoxy group per molecule and on average at least three hydroxyl and/or alkoxy groups bonded to silicon per molecule; (B) a catalyst component characterized in that the catalyst component is according to the formula ##STR1## wherein R.sup.1 and R.sup.2 each independently represent a pentahapto ligand, R.sup.3 represents a fluoroaromatic ligand having a fluorine atom bonded in the ortho position relative to the M-ligand bond, R.sup.4 represents a group R.sup.3 or a monovalent alkyl, alkenyl, alkoxy, alkoxy alkoxy, halogen, aryl, halo substituted aryl, organosilicon or organosiloxane group and M represents Ti, Zr or Hf, which is curable by exposure by UV radiation; and optionally (C) an organo-silicon having two of silicon-bonded hydroxyl or alkoxy groups per molecule, wherein the organo-silicone is selected from the group consisting of organopolysiloxane and organosilicon-organic copolymer.

Abstract: A solution of an alcohol stable emulsion or microemulsion containing an organopolysiloxane is made by polymerizing a cyclic siloxane in an aqueous medium containing the cyclic siloxane, a nonionic surfactant, an ionic surfactant, and a catalyst, until an organopolysiloxane of desired molecular weight is obtained; adding a silicone polyether to the emulsion or microemulsion and mixing the silicone polyether and the emulsion or microemulsion to form a blend; and adding the blend of silicone polyether and emulsion or microemulsion to aqueous alcohol. It is beneficial to cool the blend to below 20.degree.-25.degree. C. before adding it to aqueous alcohol. It is also beneficial to mix the silicone polyether and the emulsion or microemulsion without application of mechanically induced shear.

Abstract: A metallized uniaxially heat-shrinkable, biaxially oriented, multilayer film having a polypropylene-containing core layer comprising at least 70 wt. % of said multilayer film and at least one polyolefin-containing skin layer adjacent said core layer is prepared by biaxially orienting a coextrudate and thereafter orienting said coextrudate by stretching 10 to 40% in the machine direction. The core layer contains isotactic polypropylene and a modifier which reduces the crystallinity of the polypropylene by increasing chain imperfections or reducing isotacticity of the polypropylene-containing core. Such modifiers can be selected from the group consisting of atactic polypropylene, syndiotactic polypropylene, ethylene-propylene copolymer, propylene-butene-1 copolymer, ethylene-propylene-butene-1 terpolymer, and linear low density polyethylene. The skin layer can be high density polyethylene or ethylene-propylene-butene-1 terpolymer.

Abstract: A polymeric material of at least two layers and having at least one fluorine-containing layer and at least one non-fluorine-containing layer, the fluorine-containing layer is from 0.01 to 100 .mu.m thick, contains from 0.1 to 0.76 g of fluorine/g of the fluorine-containing layer and has from 361 .mu.g to 50 mg of fluorine/cm.sup.2. The polymeric material is used for the production of storage containers, in particular for fuel.