Abstract: Novel organic silicon compounds of formula (1) are provided. ##STR1## R.sup.1 is a monovalent C.sub.1 -C.sub.4 hydrocarbon group, R.sup.2 is a divalent C.sub.2 -C.sub.3 hydrocarbon group, R.sup.3 is a monovalent C.sub.1 -C.sub.2 hydrocarbon group, m is an integer of 3-10, n is equal to 0, 1 or 2, p is equal to 0 or 1, and the sum of n+p is equal to 0, 1 or 2. Inorganic fillers are surface treated with the organic silicon compounds. Compositions comprising EPR and/or EPDM in admixture with the treated inorganic fillers are electrically insulating and have improved oil resistance and mechanical strength.

Abstract: A fiber-treating agent is obtained by dissolving in water a reaction product resulting from co-hydrolysis and condensation of (A) a fluorinated alkyl group-containing alkoxysilane, (B) an alkyl group-containing alkoxysilane, (C) an amino group-containing alkoxysilane, and (D) an epoxy group-containing alkoxysilane. The fiber-treating agent is water soluble and thus safe while it imparts satisfactory water repellency, oil repellency, stain-proof property and even durable water repellency.

Abstract: After reacting sodium sulfide anhydride and hydrogen sulfide, 3-halopropylalkoxy silane represented by the general formulaX (CH.sub.2).sub.3 Si (OR).sub.a R.sub.3-a (I)is added reacted, wherein X denotes Cl or Br; R denotes a methyl, ethyl or propyl group wherein R's can be all identical or different from each other; and "a" denotes an integer 1, 2 or 3.

Abstract: A polysulfide silane mixture is reacted with a phosphine or phosphite to produce a polysulfide silane mixture having a reduced content of high polysulfide silanes.

Abstract: A substantially non-crosslinked water-absorptive soft ocular lens material obtained by polymerizing polymerizable components comprising a methoxysilane compound (A) of the formula (I):X--Z--Si(OCH.sub.3).sub.n (R.sup.1).sub.3-n (I)wherein X is a (meth)acryloyloxy group, a vinyl group, a group of the formula ##STR1## or an allyl group, Z is a direct bond or a C.sub.1-3 alkylene group, R.sup.1 is a C.sub.1-6 alkyl group, and n is an integer of from 1 to 3, and a hydrophilic monomer (B) which has an unsaturated double bond copolymerizable with the methoxysilane compound (A) and which undergoes no crosslinking reaction, in an amount of at least 45 mol %.

Abstract: A water-absorptive soft contact lens material having a high transparency, an excellent flexibility, a high oxygen permeability independent of water content, a high mechanical strength and an adequate hardness, which comprises a copolymer prepared by the polymerization of a monomer mixture comprising an N,N-dialkyl acrylamide or methacrylamide, an N-vinyllactam and a bis(silicon-containing alkyl) fumarate in a specific ratio, and which provides water-absorptive soft contact lenses having excellent properties such as high transparency and high oxygen permeability.

Abstract: An ocular lens obtained by reacting a hydroxyl group-containing polymer shaped to have an ocular lens shape, with a silicon-containing compound of the formula (I):O.dbd.C.dbd.N--R.sup.1 --Si.sub.n O.sub.n-1 (CH.sub.3).sub.2n+1 (I)wherein R.sup.1 is a C.sub.1-6 linear or branched alkylene group, and n is an integer of from 1 to 15.

Abstract: A surface treating agent comprising a reaction product of (A) a fluoroalkyl group-containing alkoxysilane with (B) an amino group-containing alkoxysilane and optionally further with (C) an alkyl group-containing alkoxysilane is water soluble. The agent is diluted with water to form a solution for treating glass and other substrates to impart durable water repellency and other improved properties to the substrates.

Abstract: Organic silicon compounds having an alkoxy group at one end and an alkali metal salt of sulfonic acid or sulfuric acid at the other end are novel. They can be obtained by effecting hydrosilylation reaction between an alkoxyhydro-silane and a compound having an alkenyl group at one end and an alkali metal salt of sulfonic acid or sulfuric acid at the other end. They are useful as a modifier and surface treating agent.

Abstract: A water soluble water absorption preventing agent mainly comprising an organic silicon compound and/or its partial hydrolytic condensate, represented by the following general formula: ##STR1## wherein R.sup.1 denotes an alkyl group with 1-20 carbon atoms and with a linear chain or branched chain for which a halogen can substitute for part or all of the hydrogen atoms, R.sup.2 denotes a hydrogen atom or an alkyl group with 1-10 carbon atoms and with a linear chain or branched chain, R.sup.3 denotes a hydrogen atom or an alkyl group with 1-8 carbon atoms and with a linear chain or branched chain, m denotes an integer 1-2 and n denotes an integer 1-3 where m+n=3 or 4, p denotes an integer 1-50, and q denotes an integer 0-25.

Abstract: A transparent ocular lens material comprising a silicon-containing polymer having a recurring unit represented by the general formula (I): ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or a group represented by the general formula (lI): ##STR2## in which each of R.sup.5, R.sup.6 and R.sup.7 is independently an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or phenyl group. The ocular lens material has excellent transparency, high oxygen permeability and heat resistance, and excellent ultraviolet-ray absorbing properties and forming and processing properties, and has a relatively high refractive index.

Abstract: Resins having a group reactive with an isocyanate group on a side chain are modified with isocyanatosiloxanes. In one form, the isocyanatosiloxane is a single end isocyanatosiloxane obtained by effecting addition reaction between a single end hydrogenosiloxane and an isocyanate group-containing organic silicon compound having one isocyanate group and at least one aliphatic unsaturated hydrocarbon group. A single end isocyanatosiloxane obtained by introducing an isocyanate group into a single end primary aminosiloxane is also useful. In another form, the isocyanatosiloxane is a polyfunctional isocyanatosiloxane which is obtained by effecting addition reaction between a hydrogenosiloxane having at least two SiH groups and an isocyanate group-containing organic silicon compound having one isocyanate group and one aliphatic unsaturated hydrocarbon group.

Abstract: A substantially non-crosslinked low water-absorptive ocular lens material obtained by polymerizing polymerizable components comprising a methoxysilane compound (A) of the formula (I):X--Z--Si(OCH.sub.3).sub.n (R.sup.1).sub.3-n (I)wherein X is a (meth)acryloyloxy group, a vinyl group, a group of the formula H.sub.2 C.dbd.CH ##STR1## or an allyl group, Z is a direct bond or a C.sub.1-3 alkylene group, R.sup.1 is a C.sub.1-6 alkyl group, and n is an integer of from 1 to 3, and a hydrophobic silicon-containing monomer (B) which is copolymerizable with the methoxysilane compound (A) and which undergoes no crosslinking reaction.

Abstract: A contact lens material comprising a condensation polymer having a recurring unit represented by the formula (I): ##STR1## wherein R.sup.1 is --C(CF.sub.3).sub.2 -- or ##STR2## R.sup.2 is a group represented by the formula: ##STR3## in which l is an integer of 1 to 3, m is an integer of 1 to 15 and n is an integer of 1 to 3, ##STR4## in which u is an integer of 1 to 3 and v is an integer of 1 to 3, a group represented by the formula (II): ##STR5## wherein R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are the same or different and each is hydrogen atom or an alkyl group having 1 to 5 carbon atoms, or a group represented by the formula (III): ##STR6## wherein R.sup.7 is --C(CF.sub.3).sub.2 --, ##STR7## or a direct bond, and R.sup.8 and R.sup.9 are the same or different and each is an alkyl group having 1 to 3 carbon atoms, a fluoroalkyl group having 1 to 3 carbon atoms, hydrogen atom, hydroxyl group or carboxyl group.

Abstract: A highly oxygen-permeable heat-resistant material consisting essentially of a polymer obtained by polymerizing a polymerizable component containing a silicon-containing stilbene derivative of the formula (I): ##STR1## wherein each of R.sup.1 and R.sup.2 which are independent of each other, is a hydrogen atom or a group of the formula (II):--Si.sub.p O.sub.p-1 (CH.sub.3).sub.2p+1 (II)wherein p is an integer of from 1 to 8, provided that at least one of R.sup.1 and R.sup.2 is the group of the formula (II).

Abstract: An ocular lens material made of a copolymer obtained by polymerizing copolymerizable components comprising (A) a fluorine-containing di(meth)acrylate having urethane bonds, of the formula (I): ##STR1## wherein each of R.sup.1 and R.sup.2 independently represents a hydrogen atom or a methyl group, each of R.sup.3 and R.sup.4 independently represents a C.sub.5-15 alkylene group, R.sup.5 represents a C.sub.1-20 alkylene group containing from 1 to 20 fluorine atoms, each of m and n independently represents an integer of from 1 to 5, and each of x and y independently represents 0 or 1, (B) a silicone-containing di(meth)acrylate having urethane bonds, of the formula (II): ##STR2## wherein each of R.sup.6 and R.sup.7 independently represents a hydrogen atom or a methyl group, each of R.sup.8 and R.sup.9 independently represents a C.sub.1-10 alkylene group or a C.sub.2-10 ether group, R.sup.

Abstract: A transparent ocular lens material comprising a condensation polymer prepared by the condensation polymerization of a monomer mixture comprising (A) an aromatic tetracarboxylic acid dianhydride and (B) at least one diamino compound selected from (a) a silicon-containing diamine, (b) a diamino-substituted benzene and (c) a diamino-substituted diphenyl. The ocular lens material is excellent in transparency, having high oxygen permeability and moreover, excellent in heat resistance, ultraviolet-ray absorbing property and forming and processing property. Therefore, the ocular lens material can be suitably used in contact lenses, intraocular lenses, and the like.

Abstract: A soft ocular lens material prepared by copolymerizing copolymer components consisting essentially of:(A) from 5 to 70 parts by weight of a fluorine-containing (meth)acrylate;(B) from 5 to 60 parts by weight of an alkoxy-containing (meth)acrylate;(C) from 3 to 45 parts by weight of a polysiloxane macromonomer having polymerizable groups at both terminals, of the formula I: ##STR1## (D) from 3 to 40 parts by weight of a polysiloxane macromonomer having polymerizable groups bonded via one or two urethane bonds to the siloxane main chain, of the formula II: ##STR2##

Abstract: Novel organopolysiloxanes having one silanol group within a molecule and the method for manufacturing them at high purity and high yield. The organopolysiloxanes having a silanol group are expressed by the formula (1) below: ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group with 1 to 8 carbon atoms, each of R.sup.2, R.sup.3 and R.sup.4 is a monovalent hydrocarbon group with 1 to 8 carbon atoms or a siloxyl group expressed by --OSiR.sup.5 R.sup.7, wherein R.sup.5, R.sup.6 and R.sup.7 are monovalent hydrocarbon groups with 1 to 8 carbon atoms, Y is either a hydrogen atom, a halogen atom, or a monovalent hydrocarbon group with 1 to 12 carbon atoms, n is an integer of from 0 to 12, and a is either 0 or 1, with the proviso that the grouping Y--(CH.sub.2).sub.n --Si does not includes H--Si, CH.sub.3 --Si or a hydrolyzable silyl group.

Abstract: A hydrolyzate resulting from co-hydrolysis of a perfluoroalkyl group-containing organic silicon compound and a hydrolyzable group-containing methylpolysiloxane compound in a hydrophilic solvent and water constitutes a water repellent agent which is effective for imparting water repellency and facilitating falling of water droplets and thus imparting excellent water repellency and stain-proofness to a surface of an article treated therewith.