Production of rigid to semirigid polyurethane foams having an in

Details Production of rigid to semirigid polyurethane foams having an in Production of rigid to semirigid polyurethane foams having an in

1995-04-03

1997-08-05

Foelak, Morton

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

Synthetic resins

Process of treating scrap or waste product containing solid...

521 495, 521172, 521174, 528156, C08J 1104, C08G 804

Patent

active

056543441

ABSTRACT:
The invention relates to a process for the production of rigid to semirigid polyurethane foams having an increased proportion of open cells and reduced shrinkage using recyclate polyols. The invention furthermore relates to the rigid to semirigid polyurethane foams produced by this process.

REFERENCES:
patent: 3738946 (1973-06-01), Frulla et al.
patent: 4014809 (1977-03-01), Kondo et al.
patent: 4110266 (1978-08-01), Sheratte
patent: 4511680 (1985-04-01), Niederdellmann et al.
patent: 5300530 (1994-04-01), Machado et al.
patent: 5357006 (1994-10-01), Gassan
patent: 5410008 (1995-04-01), Bauer

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