Surface properties in thermoplastic olefin alloys
AssigneeVisteon Global Technologies, Inc.
InventorsRose A. Ryntz, Beth M. Wichterman
Life of this patent
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Abstract
A thermoplastic olefin resin composition having improved resistance to surface impacts, such as scratching, marring and gouging, is provided. The thermoplastic olefin resin comprises a blend of polyolefin alloy and polyamide components. The components have relative melt flow rates such that the polyamide component is selectively segregated toward the front of a melt flow. A compatibilizing agent is added to overcome the natural incompatibility of the polyolefin alloy and polyamide components of the resin. The thermoplastic olefin resin may further include a filler material when increased stiffness or modulus is desired.
Claims19
A thermoplastic resin, comprising:
- at least 94% by weight of a polyolefin alloy having a melt flow rate determined by testing according to ISO 1133 with a weight of 2.16 kg to be between 10 and 15;
- about 5% by weight of a polyamide having a melt flow rate determined by testing according to ISO 1133 with a weight of 2.16 kg to be between 12 and 23.3;
- and
- about 1% by weight of a compatibilizing agent, wherein the compatibilizing agent is a siloxane compatibilizer;
- wherein the difference between said melt flow rate for said alloy and said melt flow rate for said polyamide is between 1 and 20, such that the polyamide segregates to the surface of the resin.
A thermoplastic resin, comprising:
- at least 89% by weight of a polyolefin alloy having a melt flow rate determined by testing according to ISO 1133 with a weight of 2.16 kg to be between 10 and 15;
- about 5% by weight of a polyamide having a melt flow rate determined by testing according to ISO 1133 with a weight of 2.16 kg to be between 12 and 23.3;
- about 5% by weight of a filler material;
- and
- about 1% by weight of a compatibilizing agent, wherein the compatibilizing agent is a siloxane compatibilizer.
A thermoplastic resin for use in injection molding, the thermoplastic resin comprising:
- at least 94% by weight of a polyolefin alloy having a melt flow rate determined by testing according to ISO 1133 with a weight of 2.16 kg to be between 10 and 15;
- about 5% by weight of a polyamide having a melt flow rate determined by testing according to ISO 1133 with a weight of 2.16 kg to be between 12 and 23.3;
- and
- about 1% by weight of a compatibilizing agent;
- where in compatibilizing agent is a siloxane compatibilizer;
- wherein the difference between said melt flow rate for said alloy and said melt flow rate for said polyamide is between 1 and 20 such that the polyamide to the surface.
Dependencies are inferred from the claim text.