Enhanced melt extrusion of thermoplastics containing silicone in

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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524439, 524440, 524441, 524500, 524537, 524538, 524539, 524540, 524542, 524861, 524862, 524866, 525100, 525104, 525106, 525422, 525425, 525427, 525431, 525426, 525903, C08L 8300, C08L 7700, C08K 714, C08K 706

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048310719

ABSTRACT:
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.

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