Abstract: An ocular lens material made of a copolymer consisting essentially of (A) a polysiloxane macromonomer having polymerizable groups bonded by one or more urethane bonds to the siloxane main chain and (B) an alkyl (meth)acrylamide, wherein the weight ratio of the polysiloxane macromonomer to the alkyl (meth)acrylamide ranges from 10:90 to 90:10.

Abstract: A soft ocular lens material obtained by copolymerizing polymerizable components comprising (A) a fluorine-containing (meth)acrylate having a hydroxyl group of the formula (I): ##STR1## wherein R.sup.1 is a hydrogen atom or a methyl group, R.sup.2 is a C.sub.5-15 perfluoroalkyl group, and n is 0 or 1, (B) a hydrophilic monomer, and (C) at least one monomer selected from the group consisting of silicon-containing (meth)acrylates and siloxane-containing styrene derivatives, wherein the ratio of the amount of the fluorine-containing (meth)acrylate (A) to the amount of the hydrophilic monomer (B) is from 20/80 to 70/30 by weight ratio, and the ratio of the total amount of the fluorine-containing (meth)acrylate (A) and the hydrophilic monomer (B) to the amount of the monomer (C) is from 30/70 to 90/10 by weight ratio.

Abstract: A lactone-modified silicone composition comprising a lactone-modified silicone compound of general formula (I), and a low-viscosity silicone oil of general formula (II) having a viscosity of not more than 100 cSt at 25.degree. C., a cosmetic agent containing it, and a lustering agent containing it. ##STR1## In formula (I) above, R.sup.1 is the same or a different group selected from the group consisting of an alkyl group having 1 to 30 carbon atoms, a substituted or non-substituted phenyl group having 1 to 30 carbon atoms, or a phenylalkylene group having 1 to 30 carbon atoms consisting of a substituted or non-substituted phenyl group and an alkylene group having 2 or 3 carbon atoms, and wherein at least 50 wt. % of R.sup.1 is an alkyl group having 1 to 30 carbon atoms;A and B is each the same or a different group, and represents a methyl or R.sup.2 Z group;wherein R.sup.

Abstract: An ocular lens material made of a copolymer comprising, as main copolymerizable components, (A) a polysiloxane macromonomer having polymerizable groups bonded via one or more urethane bonds to the siloxane main chain and (B) an alkyl (meth)acrylamide, wherein the weight ratio of the polysiloxane macromonomer to the alkyl (meth)acrylamide is from 5/95 to 90/10.

Abstract: Organic silicon compounds which are expressed by the general chemical formulae (I) or (II): ##STR1## wherein R.sup.1 is a monovalent organic group with 1 to 8 carbon atoms; R.sup.2, R.sup.3 and R.sup.4 in each equation are independent and either a monovalent organic group with 1 to 8 carbon atoms or a siloxyl group expressed by ##STR2## wherein R.sup.5, R.sup.6 and R.sup.7 are independent in each equation and they are a monovalent organic group with 1 to 8 carbon atoms; and a is either 0, 1 or 2. The novel organic silicon compounds possess both a polymerizable double bond and organopolysiloxane within the same molecule. These compounds are superior in their polymerizability and copolymerizability and are useful as polymer reforming agents.

Abstract: The invention provides a higher alkoxy-substituted organopolysiloxane having, in a molecule, at least one alkoxy group of 4 to 30 carbon atoms bonded to the silicon atom excepting those at the molecular chain ends and still having a high degree of polymerization of at least 15. Such an organopolysiloxane, not known in the prior art, can be prepared by the dehydrogenation condensation reaction between an organohydrogenpolysiloxane and a higher aliphatic alcohol in the presence of a catalyst system consisting of a platinum compound and an organic acid such as acetic and citric acids. The higher alkoxy-substituted organopolysiloxane is useful as an additive in toiletry and cosmetic preparations by virtue of the good compatibility with other ingredients therein and high resistance against hydrolysis.

Abstract: An additive comprising a triglycerol-modified silicone compound as an active ingredient is added to aqueous paint compositions for reducing the surface tension thereof for ensuring formation of a smooth coating free of defects.

Abstract: Disclosed are purified polyether silicone addition reaction products of a hydrogen siloxane and a polyoxyalkylene containing a terminal double bond, which in unpurified form contains one or both of unreacted polyoxyalkylene and internal rearrangement side reaction products thereof which generate unpleasant odors in the reaction product upon storage and upon contact with water, substantially free from said unreacted polyoxyalkylene and rearrangement products thereof so that the total quantity of ketones and aldehydes produced by a treatment of the purified polyether silicones in a closed system at 60.degree. C. for 24 hours with a quantity of 10 .sup.

Abstract: A method of manufacturing aminogroup-containing polysiloxanes of uniform quality characterized in that a cyclic organopolysiloxane represented by the following general formula: ##STR1## and an aminoalkylpolysiloxane represented by the following general formula: ##STR2## are heated together in the presence of a basic catalyst.

Abstract: A novel acrylic rubber composition is proposed which has excellent moldability and good releasability from the metallic surfaces of milling rollers for the compounding works and metal molds for shaping and vulcanizing the composition into vulcanizates. The composition comprises: (a) an acrylic copolymer as the rubber base; (b) carbon black or a finely divided silica filler as a reinforcing agent; and (c) an organopolysiloxane having, in a molecule, at least one carboxyl-functional group such as .omega.-carboxyl undecyl group, bonded to the silicon atom, which can be prepared, for example, by the hydrosilation reaction between a SiH-containing organopolysiloxane and an alkyl undecylenate followed by hydrolysis of the ester group into carboxyl group.

Abstract: The invention provides a method for the preparation of a higher alkoxy-substituted organopolysiloxane having, in a molecule, at least one alkoxy group of 4 to 30 carbon atoms bonded to the silicon atom. The method comprises: mixing an organohydrogenpolysiloxane, a higher aliphatic alcohol to provide the desired alkoxy groups, a platinum compound as a catalyst for the dehydrogenation reaction between silicon-bonded hydrogen atoms and the alcohol and an organic acid, e.g., acetic and citric acids, as a co-catalyst to promote the reaction; and heating the mixture.

Abstract: A hydroxyphenyl group-containing siloxane compound represented by the following general formula (I), containing at least one R.sup.2 in a molecule to acquire an aptitude for modification of polycarbonate and polyester resins: ##STR1## wherein R represents an alkyl group containing 1 to 4 carbon atoms; R.sup.3 represents a monovalent organic group containing 1 to 20 carbon atoms; R.sup.1 represents R or R.sup.2 ; R.sup.2 represents ##STR2## m and n are each 0 or a positive integer, provided that m+n is 1 or above, and at least one R.sup.1 is R.sup.2 when n is 0.

Abstract: Disclosed are purified polyether silicone addition reaction products of a hydrogen siloxane and a polyoxyalkylene containing a terminal double bond, which in unpurified form contains one or both of unreacted polyoxyalkylene and internal rearrangement side reaction products thereof which generate unpleasant odors in the reaction product upon storage and upon contact with water, substantially free from said unreacted polyoxyalkylene and rearrangement products thereof so that the total quantity of ketones and aldehydes produced by a treatment of the purified polyether silicones in a closed system at 60.degree. C. for 24 hours with a quantity of 10.sup.

Abstract: A novel organopolysiloxane compound, which has high surface activity to form an emulsion of the water-in-oil type of various hardly emulsifiable materials, is proposed. The organopolysiloxane compound is a dimethylpolysiloxane having two types of modifying groups including polyether or polyoxyalkylene groups on one hand and higher alkyl groups bonded to the silicon atoms through an ether linkage on the other hand bonded to the silicon atoms. Different from conventional dually modified dimethylpolysiloxanes as an emulsifying agent having modifying groups of polyether groups and higher alkyl groups directly bonded to the silicon atoms, the dually modified dimethylpolysiloxane of the invention can be synthesized easily in a one-step process of the reaction in addition to the advantage of excellent emulsifying activity for various kinds of hardly emulsifiable liquids as compared with conventional emulsifying agents.

Abstract: Siloxane compounds having a hydroxyalkyl radical incorporated in their betaine moiety exhibit improved surface tension reduction and are thus useful hair cleaning agents. They can be efficiently synthesized at a low cost without autoclaving.

Abstract: A novel organosiloxane compound of the formula ##STR1## wherein R is either hydrogen atom or an alkyl having 1-3 carbon atoms, and n is an integer such that 0.ltoreq.n.ltoreq.

Abstract: A novel organopolysiloxane is disclosed which has a molecular structure having, in addition to conventional monovalent hydrocarbon groups bonded to the silicone atoms, aminoalkyl groups, e.g. --CH.sub.2).sub.3 NH.sub.2 and --CH.sub.2).sub.3 NH--CH.sub.2 CH.sub.2 --NH.sub.2, and polyoxyalkylene-substituted aminoalkyl groups, e.g. --CH.sub.2).sub.3 NH--CH.sub.2 --CH(OH)--CH.sub.2 --O--C.sub.2 H.sub.4 O).sub.21 (C.sub.3 H.sub.6 O).sub.21 C.sub.8 H.sub.17. The novel organopolysiloxane, which is soluble or emulsifiable in water without using an emulsifying agent, is useful as the principal ingredient of a fabric-finishing composition and capable of imparting very pleasant touch of softness and excellent antistatic performance to the fabric materials treated therewith.

Abstract: A composite polymeric material having a high permeability to oxygen is proposed comprising a vinyl chloride moiety, an organosilicon moiety and, optionally, a third polymeric moiety. Such a composite polymeric material can be prepared in several ways including copolymerization of vinyl chloride monomer, a polymerizable organosilicon compound and, optionally, a third monomer, graft-polymerization of a polymerizable organosilicon compound on to a polyvinyl chloride resin, graft-polymerization of vinyl chloride on to an organopolysiloxane, graft-copolymerization of vinyl chloride and a polymerizable organosilicon compound on to a third polymer and blending of the respective polymeric components.

Abstract: An oxygen permeable hard contact lens having an improved oxygen permeability and an improved hardness and rigidity and an improved refractive index, made of a polymer comprising a styrene containing a silyl or siloxanyl group having at most 15 silicon atoms.

Abstract: A copolymer comprising,(a) a hydrophilic siloxanylalkyl ester having a structure in which a siloxane part (1) having a terminal acryloyl or methacryloyl group and a siloxane part (2) having a terminal hydrophilic group are bonded through an alkylene chain with each other,(b) a hydrophilic monomer, and(c) a hydrophobic monomeris suitable for use in the production of a soft contact lens having a high oxygen permeability and an excellent affinity for the eye tissue which can be worn continuously for a long period of time.