Abstract: A rubber composition that is prepared by reacting an organic peroxide, under shear deformation, with 3-70 parts by weight of silicone rubber (I), 30-97 parts by weight of a saturated elastomer (II) that substantially fails to be crosslinked with an organic peroxide when it is used alone, and 0-20 parts by weight of another elastomer (III) that is co-crosslinkable with component (I) in the presence of an organic peroxide and which is also co-crosslinkable or highly miscible with component (II) [where (I)+(II)+(III)=100 parts by weight].

Abstract: Epoxy group-containing organic silicon compounds represented by general formula (I): ##STR1## wherein R, which may be the same or different, each represents a monovalent hydrocarbon group free from an aliphatic unsaturated bond; a represents 1 or 2; and n represents an integer of 2 to 6. The epoxy-containing organic silicon compounds contain no hydrolyzable group therein and are suited for use in coupling of organic compounds and modification or crosslinking of polymers.

Abstract: A vinylsilane compound represented by general formula (I):R.sup.1 CH.sub.2 CH.sub.2 SiR.sub.a.sup.2 (CH.dbd.CH.sub.2)3-a (I)wherein R.sup.1 represents a monovalent alicyclic unsaturated hydrocarbon group selected from the group consisting of a cyclohexenyl group and a bicycloheptenyl group; R.sup.2 represents a monovalent hydrocarbon group free from an aliphatic unsaturated bond; and a represents 1 or 2, is herein disclosed.

Abstract: A vulcanizable silicone elastomer composition which has novel crosslinking points comprises (A) 100 parts by weight of a polyorganosiloxane having a polymerization degree of at least 100, wherein the organic groups are selected from monovalent substituted and unsubstituted hydrocarbon groups and are attached to silicon atoms at a rate, on average, in the range of 1.98 to 2.02 per silicon atom and at least two of the organic groups are monovalent hydrocarbon groups possessing at least five carbon atoms and a carbon-carbon double bond issuing from a silicon atom through at least one carbon atom, (B) 5 to 200 parts by weight of an inorganic filler having a specific surface area of at least 50 m.sup.2 /g, and (C) 0.05 to 15 parts by weight of an organic peroxide.

Abstract: Rubber compounds comprising a specific type of polyorganosiloxane of the following formula ##STR1## in which R and R' independently represent a hydrocarbon substituent and n is an integer of not smaller than 3 provided that at least 6 mole % of the substituents R and R' consists of a hydrocarbon group having Small's molecular attraction constant not smaller than 350. Carbon black is added to the polyorganosiloxane whereby various physical properties are improved including breaking strength, water and hot water resistances. The rubber compound may further comprise at least one organic rubber other than the above polyorganosiloxane.

Abstract: A silicone elastomer composition which has novel crosslinking points comprises (A) 100 parts by weight of a polyorganosiloxane of a polymerization degree of at least 20, wherein the organic groups are selected from monovalent substituted and unsubstituted hydrocarbon groups and are attached to silicon atom, and at least two of the organic groups are monovalent hydrocarbon groups possessing at least five carbon astoms and a carbon-carbon double bond bonded to a silicon atom via at least one carbon atom, (B) 5 to 200 parts by weight of an inorganic filler having a specific surface area of at least 50 m.sup.2 /g, and (C) 0.1 to 25 parts by weight of a vulcanizer selected from the group consisting of sulfur, sulfur donor, substituted or unsubstituted alkylphenol resins, and quinoids.

Abstract: A polysiloxane containing an ethylidene norbornyl group possesses a terminal group represented by the formula: ##STR1## wherein R.sup.1 stands for a monovalent hydrocarbon group, a hydroxyl group, an alkoxy group, or at least one of the hydrocarbon groups represented by Y, and each R.sup.2 stands for the same or different groups selected from the class consisting of hydrogen, monovalent hydrocarbon groups, and a group represented by R.sup.1 wherein R.sup.1 has the same meaning as defined above, and being substantially in the form of a straight chain, 0 to 100 mol %, providing that 100 mol % is excluded where neither of the R.sup.1 's in the terminal groups is a hydrocarbon group represented by Y of the component units being represented by the formula: ##STR2## wherein each R.sup.3 's stand for the same or different groups selected from the class consisting of hydrogen and monovalent hydrocarbon groups and 100 to 0 mol %, providing that 0 mol % is excluded where neither of the R.sup.

Abstract: An ethylidenenorbornyl group-containing chlorosilanes compound represented by the general formula:Y.sub.a (R.sup.1).sub.b Si(Cl).sub.4-a-bwherein R.sup.1 stands for a saturated or unsaturated monovalent hydrocarbon group of 1 to 8 carbon atoms, Y for ##STR1## a for an integer of the value of 1 to 3, b for an integer of the value of 0 to 2, and a+b for an integer of the value of 1 to 3.

Abstract: A nitrogen-containing organosilicon compound represented by the general formula:(Y.sub.a R.sup.1.sub.3-a Si)bNHR.sup.2.sub.2-bwherein R.sup.1 stands for a saturated or unsaturated monovalent hydrocarbon group of 1 to 8 carbon atoms, R.sup.2 for a saturated or unsaturated monovalent hydrocarbon group of 1 to 6 carbon atoms, Y for ##STR1## a for an integer of the value of 1 to 3, and b for an integer of the value of 1 to 2.

Abstract: Disclosed is an organocyclosiloxane which comprises a compound having the following formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 8 carbon atoms; Y represents ##STR2## m is an integer of 3 to 5 and n is an integer of 1 to m.