Polyolefin compositions used for making embossed sheets with imp

Details Polyolefin compositions used for making embossed sheets with imp Polyolefin compositions used for making embossed sheets with imp

1998-10-23

1999-09-07

Wilson, Donald R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525211, 525232, 525237, 525240, C08L 2312, C08L 2316, C08L 2326

Patent

active

059488670

ABSTRACT:
Embossed sheets having improved grain retention can be made from a polyolefin composition containing a propylene polymer material and a partially crosslinked thermoplastic olefin elastomer composition that includes (1) 20-80 parts by weight of a thermoplastic elastomer containing (a) from 20 to 70% of a propylene homopolymer having an isotactic index greater than 90, or a crystalline propylene copolymer with ethylene and/or a 4-8 C alpha-olefin having a polymerized propylene content greater than 85% and an isotactic index of greater than 85%; (b) from 30 to 75% of an amorphous ethylene-propylene or ethylene-butane-1 copolymer, which is xylene soluble at room temperature and contains from 30 to 70% polymerized ethylene, and (c) from 3 to 30% of a semi-crystalline ethylene-propylene or ethylene-butene-1 copolymer that is xylene insoluble at room temperature and contains greater than 90% polymerized ethylene, and (2) 80-20 parts by weight of an ethylene/propylene/diene terpolymer rubber containing 1 to 10% of a polymerized diene and 30 to 70% polymerized ethylene. Large parts such as automobile door and instrument panels can be formed from these sheets.

REFERENCES:
patent: 4966944 (1990-10-01), Kiang
patent: 5143978 (1992-09-01), Berta
patent: 5338801 (1994-08-01), Eppert, Jr.

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