Process for preparing smooth skinned extruded foams with water-o

Details Process for preparing smooth skinned extruded foams with water-o Process for preparing smooth skinned extruded foams with water-o

1984-12-31

1987-04-14

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 459, 264 53, 264DIG5, 425461, 425817C, C08J 914, C08J 934, B29C 4720

Patent

active

046577157

ABSTRACT:
Water instead of carbon dioxide is substituted for part of the volatile organic blowing agent, e.g., pentane, resulting in extruded foams having a smooth, lustrous drum side skin compared to foams containing only organic blowing agent or organic blowing agent plus carbon dioxide.

REFERENCES:
patent: 3845184 (1974-10-01), Nackaerts
patent: 3963403 (1976-06-01), Hughes et al.
patent: 4049768 (1977-09-01), Luthra
patent: 4424287 (1984-01-01), Johnson et al.
patent: 4455272 (1984-06-01), Schubert et al.

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