Abstract: A surface-segregatable, melt-extrudable thermoplastic composition is provided which includes at least one thermoplastic polyolefin and at least one additive having the general formula, ##STR1## in which: (A) R.sub.1 -R.sub.9 are independently selected monovalent C.sub.1 -C.sub.3 alkyl groups;(B) R.sub.10 is hydrogen or a monovalent C.sub.1 -C.sub.3 alkyl group;(C) m represents an integer of from 1 to about 4;(D) n represents an integer of from 0 to about 3;(E) the sum of m and n is in the range of from 1 to about 4;(F) p represents an integer of from 0 to about 5;(G) x represents an integer of from 1 to about 10;(H) y represents an integer of from 0 to about 5;(I) the ratio of x to y is equal to or greater than 2;(J) the additive has a molecular weight of from about 350 to about 1,400; and(K) the additive is present in an amount of from about 0.5 to about 5 percent by weight, based on the amount of thermoplastic polyolefin.

Abstract: The process comprises the steps of (A) mixing a base material (A-1), which is obtained by mixing an organopolysiloxane and a reinforcing silica and then heating the resulting mixture, with an aminosilane compound (A-2) represented by the formula:(R.sup.1).sub.n Si[N(R.sup.2).sub.2 ].sub.(4-n)wherein a plurality of R.sup.1 may be the same or different and are each a substituted or unsubstituted monovalent hydrocarbon group, a plurality of R.sup.2 may be the same or different and are each a substituted or unsubstituted monovalent hydrocarbon group, and n is 2 or 3; to allow them to react; and (B) heating the reaction mixture obtained in the step (A) under normal pressure or reduced pressure to remove an unreacted aminosilane compound and a by-product amine, contained in the reaction mixture.

Abstract: An anhydride-functional polymer obtained by reacting under graft copolymerization reaction conditions,(A) an unsaturated polymer which was obtained by reacting under ene reaction conditions a mixture of reactants comprising:(i) an unsaturated anhydride having the structure: ##STR1## wherein R.sub.1 and R.sub.2 are each independently hydrogen, alkyl of 1 to about 6 carbons, or alkoxy of 1 to about 6 carbons, or a halogen; and(ii) at least one polyolefin having at least two carbon-carbon double bonds in the polyolefin backbone and having an average of at least three carbon atoms in the polyolefin backbone between the carbon-carbon double bonds; and(B) at least one ethylenically unsaturated monomer which is copolymerizable with the unsaturated polymer.

Abstract: An organopolysiloxane gum emulsion is afforded by the emulsification of an organopolysiloxane gum in water. The organopolysiloxane gum emulsion is useful as a cosmetic base, lustrant, lubricant, antifoam, fiber-treatment agent, and paint additive. The organopolysiloxane gum emulsion includes(A) 100 weight parts organopolysiloxane gum whose plasticity at 25.degree. C. is at least 0.75 mm,(B) 1 to 100 weight parts emulsifying agent, and(C) 3 to 800 weight parts water.

Abstract: Provided is a thermoplastic fluorosilicone resin of the average compositional formula (1):(RfCH.sub.2 CH.sub.2 SiO.sub.3/2).sub.x (C.sub.6 H.sub.5 SiO.sub.3/2).sub.y (SiO.sub.2).sub.z ( 1)wherein Rf is a perfluoroalkyl group having 1 to 10 carbon atoms, and x, y, and z are 0.2.ltoreq.x.ltoreq.0.95, 0<y.ltoreq.0.8, 0.ltoreq.z.ltoreq.0.05, and x+y+z=1 and having a softening point of 50.degree.-200.degree. C. The fluorosilicone resin is useful for microcapsulating a platinum catalyst for prolonging the pot life of an addition type organopolysiloxane composition and can be used as a coating agent for forming a weather resistant, stainproof, water repellent coating.

Abstract: An aqueous silicone emulsion which yields an elastomer upon removal of the water comprises a polydiorganosiloxane having alkoxysilyl endblocking groups with at least two alkoxy groups attached to the silicon atom, titanium catalyst, and optionally, a filler.

Abstract: The present invention provides a bouncing putty with low density and other desirable properties. The density is preferably between 0.33 and 0.95 g/cc, preferably between about 0.5 and 0.75 g/cc and particularly preferably about 0.6 g/cc. Borosilicone rubber base is mixed with density-reducing filler, preferably in the form of thermoplastic microspheres. Addition of a thinning agent reduces stiffness and addition of a lubricating oil improves the handling characteristics. A moisture scavenger can be added to maintain the characteristics of the bouncing putty even if some moisture is absorbed during use. A polarity modifier such as glycerine can be added to soften the putty. If desired, a colorant can be added as well.

Abstract: The instant invention pertains to a hot-melt pressure sensitive adhesive composition wherein the composition is comprised of a silicone pressure sensitive adhesive selected from the group consisting of a mixture of (i) a silicone resin and (ii) a silicone fluid and a condensed product of (i) and (ii); the silicone pressure sensitive adhesive exhibiting tackiness and adhesiveness; the silicone pressure sensitive adhesive being blended with (iii) from about 1 to 20 weight percent, based on the total weight of (i) and (ii), of a siloxylated polyether wax. The instant invention also encompasses method of using the composition, methods of making hot-melt silicone pressure sensitive adhesive-coated substrates, and devices made using the composition.

Abstract: A silicone composition containing: (A) 100 parts by weight of organopolysiloxane; 0.1 to 50 parts by weight of thickening agent (C) 0.01 to 20 parts by weight of fluorine-containing surfactant; and (D) 0.1 to 20 parts by weight of volatile water-soluble solvent.

Abstract: A silicone rubber composition comprising an organopolysiloxane and a reinforcing silica filler can be improved in crepe hardening and shelf stability by blending a specific compound as a wetter.

Abstract: The compositions proposed contain, as their main constituents,(a) a diorganopolysiloxane with triorganosiloxy groups as terminal groups, the organic groups being hydrocarbon groups which may be halogenated,(b) the reaction product of a diacylated diorganotin compound with a disilaalkane containing, per molecule, at least two monovalent hydrocarbon groups which are bonded to silicon via oxygen and may optionally be substituted by an alkoxy group, or with an oligomer of such a disilaalkane,(c) an organosilicon compound containing, per molecule, at least one amino or amino group bonded to silicon via carbon,(d) optionally, a filler and(e) optionally, a disilaalkane and/or silane containing, per molecule, at least three monovalent hydrocarbon groups which are bonded to silicon via oxygen and may optionally be substituted by an alkoxy group, or an oligomer of such a disilaalkane and/or silane.

Abstract: A silicone rubber roll is characteristically prepared on a metallic center by forming a layer of the cured product of a silicone rubber composition which comprises (A) organopolysiloxane, in which the total amount of low molecular weight siloxanes having a degree of polymerization ranging from 3 to 20 is controlled to be at most 10,000 ppm, (B) reinforcing silica powder with a specific surface area of at least 50 m.sup.2 /g, (C) silicone elastomer particles with an average particle size of 200 .mu.m, in which the total amount of low molecular weight siloxanes having a degree of polymerization ranging from 3 to 20 is 2,000 ppm or less, and (D) a curing agent.

Abstract: To a heat-curable silicone rubber composition comprising (a) an organopolysiloxane having at least two alkenyl groups in a molecule, (b) an organohydrogenpolysiloxane having at least two hydrogen atoms in a molecule, and (c) a platinum catalyst is added (d) ammonia or an ammonia precursor so that ammonia or ammonia precursor is present in an amount of 10 to 500 parts by weight of nitrogen per million parts by weight of the total of components (a), (b) and (c) in a cured product of the heat-curable silicone rubber composition. The composition cures into a silicone rubber having minimized compression set without a need for secondary vulcanization.

Abstract: A room temperature vulcanizable silicone rubber composition with crack resistant properties with improvement during cure, comprising a silanol end-stopped diorganopolysiloxane polymer; a methyl tris-(methyl ethyl ketoximino)silane crosslinker, an aminohydrocarbyl substituted ketoximinosilane adhesion promoter; a reinforcing or non-reinforcing filler or filler mixture, and an optional catalyst and plasticizer. These compositions cure to elastic materials useful as caulking materials, adhesives, coatings and encapsulating materials for the construction and other industries.

Abstract: Water soluble organosiloxane compounds are provided comprising an oligomer incorporating an addition product of at least two reactants wherein one reactant is at least one 3-glycidoxypropylalkoxy siloxane and the other reactant is at least one secondary hydroxyalkyl amine, optionally, an alkoxysilane different than 3-glycidoxypropylalkoxysilane; optionally, a primary or secondary amine different than the secondary hydroxyalkyl amine; and water.

Abstract: A composition curable to a silicone elastomer is prepared by mixing a triorganosiloxy endblocked polydimethylsiloxane fluid where the triorganosiloxy is dimethylvinylsiloxy or methylphenylvinylsiloxy, a reinforcing silica having a surface treated with organosiloxane groups which contain 0.05 to 0.32 percent by weight vinyl, a hydroxy end-terminated polydiethylsiloxane fluid, an organohydrogensiloxane fluid, a platinum catalyst, and optionally a platinum catalyst inhibitor. The triorganosiloxy endblocked polydimethylsiloxane fluid has a major peak molecular weight of 68,000 to 135,000, a dispersity index greater than 3.8, the lowest molecular weight species between 854 and 3146 and the highest molecular weight species between 174,000 and 370,000. These compositions are readily extrudable under low pressure, have improved pot-life, cure to high strength elastomers with a high durometer, and have improved mold release.

Abstract: The present invention provides for microporous ceramic materials having a surface area in excess of 50 m.sup.2 /gm and an open microporous cell structure wherein the micropores have a mean width of less than 20 Angstroms and wherein said microporous structure comprises a volume of greater than about 0.015 cm.sup.3 /gm of the ceramic. The invention also provides for a preceramic composite intermediate composition comprising a mixture of a ceramic precursor and finely divided particles comprising a non-silicon containing ceramic, carbon, or an inorganic compound having a decomposition temperature in excess of 400.degree. C., whose pyrolysis product in inert atmosphere or in an ammonia atmosphere at temperatures of up to less than about 1100.degree. C. gives rise to the microporous ceramics of the invention.

Abstract: A silicone rubber composition is prepared by mixing 100 parts by weight of an alkenyl-containing organopolysiloxane having a degree of polymerization of at least 3,000 and 5 to 30 parts by weight of finely divided silica having a specific surface of at least 50 m.sup.2 /g with 0.5 to 10 parts by weight of an organopolysiloxane resin having a weight average molecular weight of 500 to 50,000, a OH group content of 0.0001 to 0.01 mol/g, and a liquefying temperature of 50.degree. to 150.degree. C., at a temperature above the liquefying temperature of the resin. The composition has high plasticity in an uncured base compound form and is effective for extrusion molding. The composition cures into silicone rubber having low hardness, good flexibility and excellent physical properties, finding a variety of applications.

Abstract: A non-crosslinked endblocked polymer, comprising a preformed aqueous emulsion having a plurality of silanol-terminated polydiorganosiloxane particles, an endcapping silane having the formula R.sub.3 SiX where X is a hydrolyzable group, R is an alkyl group consisting of 1 to 7 carbon atoms, and an organotin catalyst. The composition results in a non-crosslinked polymer, unlike the polymers described in the prior art. It has been found that adding an endblocking silane having only one hydrolyzable group to a preformed polydiorganosiloxane emulsion results in endblocked polydiorganosiloxane molecules free of crosslinks between the polydiorganosiloxane chains.

Abstract: A room temperature curable silicone composition, comprising (A) 100 parts by weight of an organopolysiloxane each of both ends of which has one hydroxyl group, (B) 0.2 to 40 parts by weight of at least one compound selected from the group consisting of hydrolyzable silanes having 2 to 4 hydrolyzable groups and their partial hydrolysis-condensation products, (C) 1 to 100 parts by weight of a modified diorganopolysiloxane of which both ends have at least one group selected from the group consisting of a hydrogen atom, a substituted monovalent hydrocarbon group and alkoxy group having 1 to 10 carbon atoms, an unsubstituted hydrocarbon group and alkoxy group having 1 to 10 carbon atoms, and a hydroxyl group and that has a silicon-bonded modifying group made up of a substituted or unsubstituted monovalent organic group with 6 or more carbon atoms, and (D) a filler and a cured product thereof. A cured product good in peeling properties can be obtained.