Foams having increased heat distortion temperature made from ble

Details Foams having increased heat distortion temperature made from ble Foams having increased heat distortion temperature made from ble

1998-12-04

2000-04-11

Acquah, Samuel A.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

428332, 428340, 4283044, 521 59, 521 74, 521 75, 521 79, 521 99, 521122, 521132, 521133, 521134, 521139, 521142, 521144, 521150, 521917, 264 50, 264 51, 264 53, 264 54, 2641261, 264299, 26433111, 26433113, 264DIG13, 264DIG16, 264DIG17, 524 81, 524401, 524442, 524445, 524451, C08J 900, B29D 6700, B32B 326

Patent

active

06048909&

ABSTRACT:
The present invention pertains to improved alkenyl aromatic polymer foams (and processes for their preparation) having increased heat distortion temperature and improved dimensional stability while maintaining good tensile/tear, creep and environmental dimensional change properties.
The closed cell low density alkenyl aromatic polymer foams exhibit increased heat distortion temperature, when substantially random interpolymers of about 21 to about 65 mol % styrene are blended in. When these same alkenyl aromatic polymer foams are made without these interpolymers, the heat distortion temperature is not improved.

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