Structural foams of unsaturated polyester resins

Details Structural foams of unsaturated polyester resins Structural foams of unsaturated polyester resins

1979-01-08

1981-12-08

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521139, 521140, 525 49, C08J 930

Patent

active

043048765

ABSTRACT:
Unsaturated polyester resins having an acidity number of 5-90 mg. KOH/g. and a molecular weight of 500-5000 and which are capable of entrapping air or other inert gases so as to form structural foams and contain in the chain 0.1 to 20 mol % of amide and/or amine groups. These groups are preferably derived from the reaction of an organic compound having two reactive groups at least one of which contains nitrogen with the polycarboxylic acid and/or polyvalent alcohol contained in the polyester resin.

REFERENCES:
patent: 3502602 (1970-03-01), Helm et al.
patent: 3975348 (1976-08-01), Christena
patent: 4151335 (1979-04-01), Cozzi et al.

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