Abstract: Disclosed in a mold release composition comprising a fluorosilicone compound of the formula (I): (I) wherein R1, R2, R4, R5, R6, R7, R8 and R9 each is, the same or different, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, R3 and R10 each is; the same or different, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or Rf—X—, or Z—Y— in which X and Y each is; the same or different, a divalent organic group, Rf is a C1-6 fluoroalkyl group, Z is a silyl group containing a hydrolyzable site, m is 1-100, n is 1-50, and o is 0-200. The mold release composition can give excellent mold releasability and durability of mold releasability (repeated mold releasability).

Abstract: The present invention relates to a composition comprising at least one fluorosilane and at least one aminosilane, a condensation product of said fluorosilane and said aminosilane, and a surface protective agent made thereof.

Abstract: The present invention relates to a composition comprising at least one fluorosilane and at least one aminosilane, a condensation product of said fluorosilane and said aminosilane, and a surface protective agent made thereof.

Abstract: The present invention provides a method and apparatus for random number generation using a scattering waveguide. The apparatus includes a light source for providing coherent light and a scattering waveguide for receiving the coherent light and providing scattered light. The relative position of the light source and the scattering waveguide are variable. The apparatus also includes a detector for forming at least one random number based on the scattered light.

Abstract: A process for making a dispersion of a high viscosity siloxane in a volatile cyclosiloxane comprises the step of effecting ring-opening polymerisation of a volatile cyclosiloxane under catalysis by a phosphazene base, and the step of stopping the polymerisation reaction before completion of the ring-opening polymerisation of the cyclosiloxane has occurred. Preferably the polymerisation reaction is stopped by adding carbon dioxide or an acid.

Abstract: A curable silicone-based coating composition, curable to a flexible coating at a coat weight of up to 15 g/m2 when cured, comprises an organopolysiloxane polymer having at least two silicon-bonded olefinically unsaturated hydrocarbon substituents, alkoxy groups or hydroxyl groups and having a degree of polymerization of no more than 150, a cross-linking organosilicon material having at least 3 silicon-bonded reactive groups and a catalyst. The coating composition optionally contains non-reinforcing filler but contains no more than 3% by weight of reinforcing filler. The coating is preferably used on a textile fabric that has an elastomeric coating on it, and reduces friction. It is particularly useful for airbags.

Abstract: A polysiloxane-polybutylene copolymer having polybutylene chains grafted onto a polysiloxane backbone which has a variety of properties which render it valuable for applications in personal care.

Abstract: A textile fabric which has been coated with an elastomer-forming silicone-based composition, comprising an organopolysiloxane polymer having a siloxane backbone being end-blocked with at least two silicon-bonded reactive groups, preferably alkenyl, a cross-linking organosilicon material having at least 3 silicon-bonded reactive groups, preferably SiH, a catalyst, a first reinforcing filler, preferably silica or a silicone resin, and at least 2 parts by weight for every part of the first filler, of a second substantially laminar filler, preferably talc, pyrophillite, vermiculite, smectite or mica. The coated fabric may have among other benefits, a lower friction value and limiting oxygen index. Fabrics are specifically useful for inflatable safety restraints.

Abstract: A fiber treatment composition is disclosed. The composition contains siloxanes having amine-, polyol-, functionalities. The composition provides good hand, resistance to yellowing, and hydrophilicity to the fibers. The composition is preferably formulated as an aqueous emulsion. Applying the composition to textile fabrics produces treated fabrics having good hydrophilicity, good hand, and resistance to yellowing.

Abstract: A silacyclobutene compound having the formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently chloro, triorganosiloxy, organooxy, triorganosilyl, or a monovalent hydrocarbon group; R.sup.3 is a monovalent hydrocarbon group free of conjugated aliphatic unsaturation or triorganosilyl; R.sup.5 is hydrogen or a monovalent hydrocarbon group free of conjugated aliphatic unsaturation; and R.sup.4 and R.sup.6 are independently hydrogen or a monovalent hydrocarbon group free of conjugated aliphatic unsaturation or together are an alkanediyl group, wherein the alkanediyl group and the carbon atoms to which it is attached form a carbocyclic ring having 4 to 7 carbon atoms; provided that R.sup.3 is not aryl. Methods of preparing the silacyclobutene compounds, silane polymers containing at least one silacyclobutene unit, and siloxane polymers containing at least one silacyclobutene unit.

Abstract: A catalyst composition for use in the preparation of an organopolysiloxane comprises a .gamma.-butyrolactone carrier and a phosphonitrile catalyst. Preferred phosphonitrile catalysts comprise Cl.sub.3 PNPCl.sub.2 NPCl.sub.3.PCl.sub.6, (Cl.sub.3 P.dbd.N--(PCl.sub.2 .dbd.N).sub.d --PCl.sub.3).sup.+ (SbCl.sub.6).sup.- wherein d is 1 to 4, and compounds of the formula Y(PX.sub.2 .dbd.N).sub.a PX.sub.2 O) wherein X is chlorine, hydroxyl or an organosilicon radical bonded to phosphorous via oxygen, and a is 1 to 5. Also disclosed is a method for producing an organopolysiloxane by polymerisation reaction in the presence of a said catalyst composition, and use of .gamma.-butyrolactone as a carrier for a phosphonitrile catalyst in the preparation of an organopolysiloxane.

Abstract: A method for preparing an aminoalkoxysiloxane comprises reacting a siloxane having at least one Si--X bond with an aminoalcohol of the general formula HO--R--NR.sup.1.sub.2 and removing HX from the reaction mixture, wherein X is a hydrogen atom, an --OH group or an --OC(O)NR.sup.1.sub.2 group, R is a divalent substituted or unsubstituted alkylene or arylene group, and R.sup.1 is a hydrogen atom or an alkyl group having from one to eighteen carbon atoms. The siloxane and aminoalcohol are preferably HO(Me.sub.2 SiO).sub.4.5 H and ethanolamine, (Me.sub.3 SiO).sub.2 MeSiH and ethanolamine, isopropanolamine or 3-aminopropan-1-ol, or Me.sub.3 SiO(Me.sub.2 SiO).sub.3 (MeHSiO).sub.5 SiMe.sub.3 and isopropanolamine respectively. The aminoalkoxysiloxanes thus prepared are useful for treating textile fabrics.

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 process for the ring-opening polymerisation of cyclosiloxanes, which comprises contacting a cyclosiloxane with 1-500 ppm by weight of a phosphazene base, based on the weight of cyclosiloxane, in the presence of water, preferably 0.5-10 mols per mol of phospazene base. Also claimed is a process in which the cyclosiloxane is present together with an agent which inhibits catalyst activity of the phosphazene base, e.g. carbon dioxide or water, in which the polymerisation is initiated by reducing the effect of the inhibiting agent e.g. by heating.

Abstract: Silyl cation of the formula Si.sup.+ R.sub.2 R' wherein R denotes a hydrogen, a hydrocarbon or fluorine and R' denotes a norbornyl or cyclopentenyl containing substituent is free of co-ordination with a solvent and is stable at a temperature of upto at least 40.degree.C. Also disclosed is a compound consisting of the cation and a borate or carborane anion, a composition comprising the cation and a solvent and a process for making the cation.

Abstract: A gypsum mixture is disclosed which has hydrophobic additive substantially uniformly dispersed therein and which comprises gypsum, a first silane of the general formula (RO).sub.3 SiR or of the general formula (RO).sub.2 SiR.sub.2, and a second silane of the general formula (RO).sub.3 SiR' or of the general formula (RO).sub.2 SiRR', wherein each R is the same or different and represents a lower alkyl group, and R' represents a lower alkyl group which is substituted by a substituent selected from an amino, amino-lower alkyl-amino or dialkylenetriamine group. Preferably, the first silane is methyltrimethoxysilane and the second silane is N-(2-aminoethyl)-3-aminopropyltrimethoxysilane. Also disclosed is a method for preparing said gypsum mixture.

Abstract: A method for preparing a viscosity stable amido functional polysiloxane having a group .dbd.NCO(CHR).sub.n OH connected with a silicon atom of a siloxane unit of the polysiloxane comprises;i) preparing a viscosity stable intermediate amino functional polysiloxane having one or more siloxane units according to the general formula R.sup.2.sub.q' (HR.sup.4 N R").sub.r' SiO.sub.(4-(q'+r'))/2, any remaining units of the intermediate being of the general formula R.sup.2.sub.q SiO.sub.(4-q)/2, by condensation polymerisation;ii) adding an alcohol or substituted alcohol to the intermediate or to organo-silicon compounds used to produce the intermediate by condensation polymerisation, the alcohol or substituted alcohol being of the general formula R.sup.1 OH, wherein R.sup.1 is a substituted or unsubstituted alkyl group of from 4 to 30 carbon atoms, and;iii) reacting the viscosity stable intermediate polysiloxane resulting from ii) with a lactone of the general formula ##STR1## wherein R and n are as defined above.

Abstract: A cementitious material in powder form comprising cement, also comprises sufficient of a granulated hydrophobing additive, which comprises from 5 to 15 parts by weight of an organopolysiloxane component, from 10 to 40 parts by weight of a water-soluble or water-dispersible binder and from 50 to 80 parts by weight of a carrier particle, to give from 0.01 to 5% by weight of the organosiloxane component based on the weight of the cement. The cementitious material displays good hydrophobicity, which may improve upon subsequent wettings of the applied cementitious material to a substrate.

Abstract: Cyclic silethynyl polymers, having at least 4 silicon atoms per polymer, have the average formula ##STR1## Preferably x has a value of 5 or 6, and each R is independently methyl or phenyl. They are prepared by reacting a lithium salt of one or more diehtynylsilanes with one or more dihalosilanes. These polymers are useful for example in semi- or photoconductive applications.

Abstract: A composition comprising a complex of a Cu(II) salt formed from copper or a copper salt, an organosilicon compound having at least one Si-bonded group which include 2 amino nitrogens which may enter into a heterocyclic ring structure with Cu and 2 to 5 carbon atoms linking the N atoms, and water in the presence of oxygen, is useful as a catalyst for oxidative coupling reactions of certain silicon compounds. Formulations comprising up to 5 parts of the above composition and 100 parts of either arylolsilicon compounds or arylcyanophenylacetylsilicon compounds are particularly claimed.