Method of molding polyurethanes having mold release properties

Details Method of molding polyurethanes having mold release properties Method of molding polyurethanes having mold release properties

1976-09-24

1978-09-05

Ivy, C. Warren

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

Synthetic resins

Cellular products or processes of preparing a cellular...

260 18TN, 264300, 264DIG83, 521125, 521129, 521 51, 521904, C08G 1834, C08K 326, C08K 509

Patent

active

041118618

ABSTRACT:
This invention relates to compositions and methods for forming polyether polyurethanes utilizing internal release additives for the purpose of facilitating mold release in the production of molded objects. The invention discloses four classes of internal release additives: (1) mixtures of aliphatic or aryl carboxylic acid and a polar metal compound; (2) carboxyalkylsiloxanes; (3) aliphatic glyoximes; and (4) aralkyl quaternary ammonium salts.

REFERENCES:
patent: 3201359 (1965-08-01), Herrick
patent: 3383144 (1968-05-01), Zapponi
patent: 3505250 (1970-04-01), Saunders
patent: 3726952 (1973-04-01), Boden
patent: 3925527 (1975-12-01), Kleimann
patent: 3931381 (1976-01-01), Lindberg
patent: 3933705 (1976-01-01), Olstowski
patent: 3993606 (1976-11-01), Von Bonin
patent: 3996172 (1976-12-01), Olstowski

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