Abstract: A method for producing a functionalized silica, compositions and methods for forming curable silicone rubber compositions by using the functionalized silica are also disclosed. Compositions and methods for forming cured silicone resin compositions and products having high transparency, high tensile strength, desirable percent elongation, or a combination of the foregoing properties are also disclosed.

Abstract: A method for producing a functionalized silica,compositions and methods for forming curable silicone rubber compositions by using the functionalized silica are also disclosed. Compositions and methods for forming cured silicone resin compositions and products having high transparency, high tensile strength, desirable percent elongation, or a combination of the foregoing properties are also disclosed.

Abstract: The invention provides non-stick coated molds, a process for the preparation thereof and their use for the production of plastics molded parts, particularly for the production of molded parts made of polyurethane foam.

Abstract: An optical data storage medium is disclosed. The medium includes a substrate of a transparent thermoplastic resin and a radiation-cured coating. The coating includes at least one colloidal metal oxide, at least one hydrolysis product of one or more alkoxysilyl acrylate, at least one acrylate monomer, and an optional UV photoinitiator. In a preferred embodiment, the substrate is of polycarbonate. Also disclosed is a process for making the medium.

Abstract: The invention provides non-stick coated molds, a process for the preparation thereof and their use for the production of plastics molded parts, particularly for the production of molded parts made of polyurethane foam.

Abstract: Addition crosslinking silicone rubber mixtures comprising an alkenyl group—containing organopolysiloxane, a hydrogen siloxane, a Pt or Rh catalyst and an alkoxy silane or alkoxy siloxane.

Abstract: The present invention relates to a new fluororubber, a process for its production and its use, as well as a process for producing fluororubber mouldings and/or coatings.

Abstract: The present invention relates to silicone elastomers based on platinum-catalyzed, hot-curing organopolysiloxane compositions which are characterized by particularly low compression set after crosslinking and to a process for the production of these elastomers.

Abstract: A textile finishing agent comprising, by weight, about(A) 50-80 parts of an aqueous colloidal suspension, in the form of a sol, at least one of an organosilsesequioxane having units of the formula RSiO.sub.3/2 (wherein R is optionally substituted alkyl or aryl of up to 7 carbon atoms) and a cocondensate of a hydrolyzate of a tetraalkoxysilane with an organotrialkoxysilane having RSiO.sub.3/2 or SiO.sub.2 units, and(B) 20-50 parts of an aqueous dispersion which contains about 5 to 50% by weight of an organic polymer resin which contains perfluoroalkyl groups which have 3 to 20 C atoms and which, in addition to fluorine atoms, can contain at most 1 hydrogen atom or chlorine atom per 2 C atoms and in which the perfluoroalkyl chain can be interrupted by oxygen and which has a fluorine content of about 0.2 to 40% by weight.Textiles finished therewith are hydrophilic, oleophilic and soil resistant.

Abstract: The subject of the present invention is a process for the preparation of polydiorganosiloxanes containing hydroxyaryloxy terminal groups by reacting polydiorganosiloxanes containing bis-acyloxy terminal groups with diphenols in a molar ratio of 1:2 to 1:20.

Abstract: An aqueous emulsion, having a long shelf life, of a low molecular weight silicone resin comprising by weight(a) 1-60% of a silicone resin of the formula ##EQU1## wherein R.sup.1 is a monovalent hydrocarbon radical having 1 -14C atoms,R.sup.2 is a monovalent hydrocarbon radical having 1 -18C atoms,x has a value from about 0.75 to 1.5 andy has a value from about 0.2 to 2.0,and having a viscosity of about 2 to 2000 mPa.s,(b) 0.1-10% of an emulsifier, and(c) water.Advantageously two non-ionic emulsifiers are used in combination.

Abstract: A dispersion comprising a solvent having dispersed therein a plastic and a defoaming agent comprising by weight approximately (a) 80 to 100% by weight of a polyoxyalkylenesiloxane copolymer of the formula[R.sup.1 Si(OSiR.sub.2).sub.n ].sub.m Z.sub.m-1 (OR.sup.2).sub.m+2in whichR represents an optionally halogen-substituted alkyl group with up to 4 C atoms,R.sup.1 represents the substituent R or a phenyl radical,R.sup.2 represents a group of the composition ##STR1## Z represents the difunctional unit --O-- or ##STR2## and R.sup.3 denotes a hydrocarbon radical with up to 6 C atoms,R.sup.4 denotes independently of one another hydrogen or R.sup.3,n denotes a number between 3 and 40,m denotes a number between 1 and 15,x denotes a number between 0 and 68,y denotes a number between 0 and 52,x+y denotes a number between 1 and 68 and(b) 0-20% by weight of a hydrophobic silicon dioxide, whereby substantially bubble-free films can readily be prepared therefrom.

Abstract: A composition which is heat curable to give an elastomer of improved properties comprising(a) an organopolysiloxane polymer having a viscosity of 1,000,000 to 200,000 mPas at 25.degree. C. and comprising the structural unit ##EQU1## wherein R is a hydrocarbon radical or a halohydrocarbon radical, anda is between about 1.95 and 2.01,(b) a polycarbodiimide-polysiloxane copolymer comprising a polysiloxane continuous liquid phase containing a discontinuous phase of finely dispersed polycarbodiimide particles produced by condensing a diisocyanate in the polysiloxane,(c) a curing catalyst, and(d) a filler,the polycarbodiimide comprising about 0.1 to 80% by weight of (a) plus (b). Upon curing, the permanent set of the elastomer is reduced and/or the resistance to hydrolytic degradation is improved.

Abstract: An aqueous dispersion approximately comprising by weight(A) 1-30 parts by weight of a polyether-siloxane, cross-linked via alkylenoxy bridges, of the general formula ##STR1## in which Z is divalent alkylenoxy radical with 2-8 C atoms,R is a polyether radical,x is an integer between 2 and 25, andy is an integer between 1 and 9,(B) 1-40 parts of a high-molecular polyethylene with an average molecular weight of above 15,000-50,000,(C) 1-10 parts of an anionic emulsifier,(D) 0-15 parts of a non-ionic emulsifier, and(E) 2-97 parts of water.has been found to be particularly stable and useful in the finishing of textiles.

Abstract: Polyisocyanate addition products are made by reacting a polysiloxane having isocyanate reactive end groups, excess polyisocyanate and a compound selected from the group consisting of aliphatic alcohols, primary aliphatic amines, secondary aliphatic amines and mixtures thereof having a molecular weight of from 75 to 5000 and at least one tertiary amino group and/or oxyalkylene unit. In a preferred embodiment, the polysiloxane is reacted with excess polyisocyanate and the reaction product is subsequently reacted with the alcohol and/or amine. The addition products of this invention are particularly useful as mold release agents in the production of molded lacquer coated plastics by the "in-mold coating process.

Abstract: A process for the preparation of an organopolysiloxane composition, comprising polymerizing at a temperature from about room temperature to 250.degree. C. a composition by weight comprising approximately(a) 10 to 90% organopolysiloxane,(b) 4.999 to 85% of at least one of a surfactant and a water-soluble polyether,(c) 85-5% of at least one polymerizable vinyl monomer, and(d) 0.001 to 2% of a radical forming polymerization catalyst,whereby the vinyl monomer is polymerized and forms polymer bridges between (a) and (b). The resulting composition is miscible with and/or readily dispersible in water, is storage-stable and is especially useful as a textile auxiliary.

Abstract: A process for forming a polymer suitable for use in a defoaming agent, comprising polymerizing in the presence of a free-radical-forming catalyst a composition comprising by weight approximately10-90% of a polydiorganosiloxane,5-85% of a polyalkylene oxide or polyalkylene oxide derivative, and5-85% of a vinyl monomer,thereby to form vinyl polymer bridges linking the polydiorganosiloxane and polyalkylene oxide or derivative thereof. The polymer is then blended with water and an emulsifying and/or dispersing auxiliary and subjected to high shear to form a defoaming agent.

Abstract: A graft polymer dispersion suitable for finishing textiles and comprising water, a dispersing auxiliary and a polymeric product produced by subjecting to free radical polymerization a composition comprising(A) an organopolysiloxane containing vinyl groups,(B) an organopolysiloxane containing Si-H groups, and(C) a polymerizable vinyl monomer, some of the organopolysiloxane components being linked via polymerized units of the vinyl monomer and some of the Si-H groups of the Si-H-organopolysiloxane being modified by mono-addition of the vinyl monomer.

Abstract: A graft copolymer dispersion is produced by polymerizing a mixture comprising by weight approximately(a) 1 to 99% of an organopolysiloxane mass containing Si-H groups and vinyl groups, and(b) 99 to 1% of a polymerizable vinyl monomer.Polymerization initiators and/or molecular weight controllers may also be present. The product is not crosslinked as produced but can be blended with a crosslinking agent, applied to a textile as a coating and the crosslinked.

Abstract: The invention relates to plastics mouldings, more particularly transparent plastics mouldings, which are finished with a coating of three successively stoved, chemically different layers, and to a process for producing the finish. The special finish considerably improves the scratch resistance, abrasion resistance, weathering resistance and yellowing resistance of the plastics surfaces without affecting the transparency of the plastics moulding. The first layer (primer layer) is produced from a hardenable acrylic resin and an aminoplast resin, the second layer from a thermoplastic acrylic resin, a plasticizer and a masked polyisocyanate and the third layer (cover layer) from at least one partially hydrolyzed organosilane, an .alpha.,.omega.-dihydroxy polydimethyl siloxane, a silica sol and at least one masked polyisocyanate as binder in the presence of a water-soluble organic or inorganic acid. The three-layer coating contains UV-absorbers, light stabilizers and, optionally, standard auxiliaries.