Methods of preparing polymeric foams using cyclic urea blowing p

Details Methods of preparing polymeric foams using cyclic urea blowing p Methods of preparing polymeric foams using cyclic urea blowing p

1994-06-24

1996-11-26

Nutter, Nathan M.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 51, 521128, 521130, 521131, 521158, 521159, 521163, 521164, 521170, 25218223, 25218224, 25218225, 25218234, C08L 7504

Patent

active

055786561

ABSTRACT:
A method for the preparation of cellular polymeric products which comprises reacting an organic polyisocyanate with an isocyanate-reactive composition, characterised in that the isocyanate-reactive composition comprises a blowing promoter which is a cyclic urea compound having at least one isocyanate-reactive substituent.

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patent: 4094827 (1978-06-01), McEntire
patent: 4098729 (1978-07-01), Kollmeier et al.
patent: 4154391 (1979-05-01), Girty
patent: 4194069 (1980-03-01), Sperranza
patent: 5079271 (1992-01-01), Gillis
patent: 5102923 (1992-04-01), Porosoff et al.

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