Thermoplastic compositions and method of use thereof for molded articles
AssigneeAdvantage Polymers, LLC.
InventorsKris Winowiecki, David Harris
Life of this patent
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Abstract
A polyolefin composition containing elastomers (plasticizers), crystalline polypropylene, modified by mixing with polybutene-1 and a coupling agent and a bicyclic dicarboxyl acid salt nucleating agent and/or a lubricant which comprises an unsaturated fatty acid ester which acts as a surface modifier in a molded article is described. The composition is adapted to be used with pigments to make finished molded articles which have an appearance of paint covered by a clear coat and which are scratch resistant and have good low temperature (−30° C.) impact properties.
Claims30
A thermoplastic composition which comprises in admixture:
- (a) a crystalline polybutene-1;
- (b) a crystalline polyolefin other than the polybutene-1;
- (c) a thermoplastic polyolefin elastomer;
- (d) a lubricant additive comprising an unsaturated fatty acid ester which reduces surface friction to improve scratch and mar performance and produces a glossy finish;
- (e) optionally a nucleating agent that acts as a surface hardener;
- (f) optionally a nano sized filler which improves material stability under temperature change and physical properties;
- and
- (g) optionally a coupling agent which couples the composition together in an amount up to about 10% by weight.
A method for the preparation of a molded article which comprises:
- (a) providing a thermoplastic composition which comprises in admixture:
- a crystalline polybutene-1;
- a crystalline polyolefin other than the polybutene-1;
- a thermoplastic polyolefin elastomer;
- a lubricant additive comprising an unsaturated fatty acid ester which reduces surface friction to improve scratch and mar performance and produces a glossy finish;
- optionally a nucleating agent that acts as a surface hardener;
- optionally a nano sized filler which improves material stability under temperature change and physical properties;
- and optionally a coupling agent which couples the composition together in an amount up to about 10% by weight;
- and
- (b) forming the article in a molding process using a warm highly polished tool to achieve a high gloss scratch resistant surface.
A thermoplastic composition which comprises in admixture;
- (a) a crystalline polybutene-1;
- (b) a crystalline polyolefin other than the polybutene-1;
- (c) a thermoplastic polyolefin elastomer;
- (d) a nucleating agent comprising a solid bicyclic dicarboxylic acid salt;
- and
- (e) optionally a coupling agent which couples (a), (b), (c) and (d) together in an amount up to about 10% by weight.
A method for the preparation of a molded article which comprises:
- (a) providing a thermoplastic composition which comprises in admixture:
- a crystalline polybutene-1;
- a crystalline polyolefin other than the polybutene-1;
- a thermoplastic polyolefin elastomer;
- a nucleating agent comprising a solid bicyclic dicarboxylic acid salt;
- and optionally a coupling agent which couples (a), (b), (c) and (d) together in an amount up to about 10% by weight;
- and
- (b) forming the article in a molding process.
Dependencies are inferred from the claim text.