초록 ▼

High modulus thermoplastic compositions and composites are produced which exhibit enhanced melt integrity and strength, allowing the composites to be melt-drawn to smooth surfaced, high tolerance profiles, such as thin-walled tubing, wire, coatings, films, etc. The melt integrity is improved by addi

High modulus thermoplastic compositions and composites are produced which exhibit enhanced melt integrity and strength, allowing the composites to be melt-drawn to smooth surfaced, high tolerance profiles, such as thin-walled tubing, wire, coatings, films, etc. The melt integrity is improved by adding to the thermoplastic prior to or during thermoplastic melt processing a silicone component which will be vulcanized within the thermoplastic to form a silicone semi-interpenetrating polymer network initiated during the melt processing of the thermoplastic. The composition contains about 0.1 to 20, and preferably about 1 to 4 weight percent of the silicone network, and may also contain fibrous reinforcement and/or filler/modifiers.

대표청구항 ▼

A method of improving melt integrity in a thermoplastic molding resin having an unfilled flexural modulus greater than 90,000 psi, comprising adding to said thermoplastic resin prior to or during thermoplastic melt processing a silicone component which will be vulcanized by the reaction of a hydride

A method of improving melt integrity in a thermoplastic molding resin having an unfilled flexural modulus greater than 90,000 psi, comprising adding to said thermoplastic resin prior to or during thermoplastic melt processing a silicone component which will be vulcanized by the reaction of a hydride-containing silicone within said thermoplastic resin to form silicone semiinterpenetrating polymer network, initiating the vulcanization of said silicone component by thermoplastic melt processing of said component within said thermoplastic resin, extruding said thermoplastic resin, and melt-drawing the resin to a high tolerance profile part. A method according to claim 1 wherein said resin contains a fibrous reinforcing agent selected from the group consisting of glass, carbon, aramid, ceramic, boron, metal, and reinforcing mineral fibers other than glass and ceramic fibers.