Abstract: There is disclosed a heat-resistant agent which exhibits good solubility in various organopolysiloxanes and which confers superior heat-resistance thereto, said heat-resistant agent having the formula ##STR1## wherein R.sup.2 is independently selected from hydrocarbon or halogenated hydrocarbon groups having 1 to 10 carbon atoms, R.sup.1 is independently selected from R.sup.2 or a eugenol residue, m is an integer having an average value of 5 to 500 and n is an integer having an average value of 0 to 500, with the proviso that there is at least one eugenol residue in the molecule. Also disclosed is a composition comprising an organopolysiloxane and the above described heat-resistant agent.

Abstract: There is disclosed a thermoplastic resin composition wherein the dispersion of a polyorganosiloxane in a thermoplastic resin is improved by the inclusion of a copolymer of an organosiloxane compound and an ester of a vinylcarboxylic acid or a copolymer of an aromatic vinyl compound, an unsaturated aliphatic nitrile compound and an organosiloxane compound. As a consequence of the excellent dispersion, the composition has improved moldability compared with conventional thermoplastic resins containing only polyorganosiloxane and yields moldings that have a releasability, lubricity, water repellency and mechanical strength superior to moldings from the conventional thermoplastic resins containing only polyorganosiloxane.

Abstract: A method for preparing a thermoplastic resin composition, said method comprising hot-kneading, in the absence of a radical-generating catalyst,(A) 100 parts by weight of a thermoplastic resin; and(B) 0.1 to 200 parts by weight of an alkenyl-functional polyorganosiloxane filled with amorphous silica micropowder, wherein the weight ratio of said silica micropowder to said alkenyl-functional polyorganosiloxane is 0.01:100 to 50:100, whereby the polyorganosiloxane of component (B) is chemically bonded to resin (A).

Abstract: A siloxane powder composition which can impart improved lubricity character to a thermoplastic resin is disclosed, said composition being prepared by mixing(A) 100 parts by weight of a liquid polydiorganosiloxane and(B) 40 to 200 parts by weight of a silica powder that has a specific surface of at least 50 m.sup.2 /g using sufficient shear to prepare a powder in which the surface of component (B) is coated with component (A), and then mixing this powder with(C) 10 to 50 parts by weight of a polyorganosiloxane resin which is a solid at room temperature, said resin consisting essentially of (R.sub.3 SiO.sub.1/2) siloxane units and (SiO.sub.2) siloxane units in the molar ratio of 1:4 to 1:1,where R is selected from the group consisting of alkyl radicals and phenyl radical.

Abstract: A polycarbonate resin comprising (A) a thermoplastic resin comprising a polycarbonate resin as the main component thereof, (B) inorganic fillers and/or inorganic pigments and (C) an organopolysiloxane having an organoxysilyl group which is bonded to a silicon atom through a divalent hydrocarbon group is provided. The polycarbonate resin shows a lesser degree of molecular weight decrease, has excellent heat stability and moldability, and provides molded articles having excellent appearance, mechanical properties like impact resistance, degree of whiteness and color tone. The polycarbonate resin can be applied to production of various kinds of molded articles, such as molded articles in the field of office automation instruments, electric and electronic products, automobiles, mechanical products, building materials and the like.

Abstract: A siloxane powder composition which can impart improved lubricity character to a thermoplastic resin is disclosed, said composition being prepared by mixing(A) 100 parts by weight of a liquid polydiorganosiloxane and(B) 40 to 200 parts by weight of a silica powder that has a specific surface of at least 50 m.sub.2 /g using sufficient shear to prepare a powder in which the surface of component (B) is coated with component (A), and then mixing this powder with(C) 10 to 50 parts by weight of a polyorganosiloxane resin which is a solid at room temperature, said resin consisting essentially of (R.sub.3 SiO.sub.1/2) siloxane units and (SiO.sub.2) siloxane units in the molar ratio of 1:4 to 1:1,where R is selected from the group consisting of alkyl radicals and phenyl radical.

Abstract: A control cable including a conduit having flexibility, the inside surface of which is fitted with a liner, and an inner cable having an inner coat, which is inserted into the conduit so that the inner cable slides slidden in the conduit. The liner is made of a thermoplastic resin dispersively containing 13 to 20% by weight of organopolysiloxane which in turn is made of 45 to 85% by weight of an organopolysiloxane having an ultra-high viscosity of which kinematic viscosity is 1,000,000 to 50,000,000 cSt at 25.degree. C. and 55 to 15% by weight of an organopolysiloxane having a lower viscosity of which kinematic viscosity is 25 to 10,000 cSt at 25.degree. C. The inner coat is made of a thermoplastic resin. The control cable shows excellent load efficiency and can be smoothly operated for a long period of time.

Abstract: A thermoplastic resin composition for cleaning a shaping apparatus such as an extrude by a simple operation, comprising 2-30% by weight of a sodium salt of sulfonic acid, 0.5-10% by weight of a water-repellent compound and a thermoplastic resin and as an optional component, finely ground inorganic compound having a particle size of 0.005 to 10 .mu.m.