Abstract: A resin composition having lubricating properties, which comprises 100 parts by weight of a synthetic resin, from 0.5 to 20.0 parts by weight of an organopolysiloxane and from 0.5 to 20.0 parts by weight of a fluorine-containing rubber or from 0.05 to 7.0 parts by weight of a trimethoxysilane, wherein at least one of said organopolysiloxane, fluorine-containing rubber and trimethoxysilane has a functional group.

Abstract: A fluorine-containing elastomeric electric insulating material is disclosed. The material is a vulcanized product of a composition comprising 100 parts by weight of a fluorine-containing elastomeric copolymer having a number average molecular weight of from 20,000 to 60,000, containing as major components a unit based on tetrafluoroethylene and a unit based on an .alpha.-olefin having 2 to 4 carbon atoms and exhibiting rubber elasticity at room temperature, 0.1 to 5 parts by weight of an organic peroxide and 0.1 to 20 parts by weight of a polyallyl compound.

Abstract: A rubber stopper for sealing comprises a substrate of a rubber stopper which is partially or wholly coated with a fluorine-containing elastomer comprising a graft copolymer having rubber-like elasticity and having chemical linkages of fluorine-containing polymeric segments and organopolysiloxane segments at reactive sites of said segments.

Abstract: High molecular fluoroelastomers are thermally modified by heating the fluoroelastomer at its thermally degradable temperature in the presence of oxygen under maintaining elasticity. The modified fluoroelastomers have the improved adhesiveness and processability and are easily vulcanized.

Abstract: Finely ground polytetrafluoroethylene molding powder with or without a filler is subjected to high speed agitation in the presence of a medium consisting essentially of water and a hydrophobic organic liquid at a ratio of 0.5 to 1 liter per 1 Kg of the resin to agglomerate it. Hydrophobic organic liquids mean organic liquid which dissolve less than 15 wt. % in water at the temperature of agglomeration.The volumetric ratio of the organic liquid to water is in a range of 2 to 1/2.The agglomerated product having narrow particle size distribution and high bulk density and free flowing property can be obtained by the agitation for short time.

Abstract: A fluorocarbon polymer composite comprises a fluorocarbon polymer and a filler in a form of powder, granules, beads, fiber, fabric sheet or a like which is treated with polyphenylene sulfide.