Polypropylene-based resin exterior panel and process for produci

Details Polypropylene-based resin exterior panel and process for produci Polypropylene-based resin exterior panel and process for produci

1998-03-12

2000-11-21

Chen, Vivian

Stock material or miscellaneous articles

Composite

Of polyamidoester

428516, 428520, 264255, 264267, 264275, B32B 2732

Patent

active

061500267

ABSTRACT:
To provide a polypropylene-based resin exterior panel which has the same appearance qualities as a coated product though it is not coated and which is excellent in rigidity and impact resistance, a polypropylene-based resin exterior panel comprising a surface layer made from a highly transparent resin composition comprising a propylene-.alpha.-olefin random copolymer having a melting point lower than 155.degree. C. and a melt flow rate (MFR) of 0.5 to 30 g/10 min and a clarifying nucleating agent, an intermediate layer made from a colored resin composition comprising a propylene-.alpha.-olefin random copolymer having a melting point lower than 155.degree. C. and an MFR of 0.5 to 30 g/10 min and a coloring pigment, and a base layer made from a base composition comprising a propylene-.alpha.-olefin block copolymer having a melting point of 155.degree. C. or higher is produced by forming a skin by laminating the surface layer and the intermediate layer, disposing the skin in an injection mold, and injecting and filling the base composition to form the base layer.

REFERENCES:
patent: 5310584 (1994-05-01), Jacoby et al.
patent: 5759588 (1998-06-01), Harada
Database WPI, Section Ch. Week 8114, Derwent Publications Ltd., Class A60, AN 81-241330- XP-002089044 Feb. 1981.
Database WPI, Section Ch. Week 9637, Derwent Publications Ltd., Class A17, AN 96-368212- XP-002089045 Jul. 1996.

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