Process for rigid foams of improved friability

Details Process for rigid foams of improved friability Process for rigid foams of improved friability

1980-05-12

1981-10-06

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252438, 521130, 521170, C08G 1814, C08G 1818, C08G 1824, C08G 1832

Patent

active

042936586

ABSTRACT:
Polyurethanes based on a resole-type polyol can be significantly improved in their friability when the urethane catalyst is a fully neutralized tertiary amine salt and butyl benzyl phthalate is used as the plasticizer.
The polyol is prepared by reacting a phenol and formaldehyde under substantially anhydrous conditions with continuous removal of water, and has a water content of no more than about 5%.

REFERENCES:
patent: 3485797 (1969-12-01), Robins
patent: 3632531 (1972-01-01), Rush et al.
patent: 3769244 (1973-10-01), Hashimoto et al.
patent: 3872034 (1975-03-01), Dickert
patent: 3948824 (1976-04-01), Robins
patent: 4165412 (1979-08-01), Bechara et al.
patent: 4169922 (1979-10-01), Brown et al.
patent: 4196268 (1980-04-01), Brown et al.
Rochester-Acidity Functions, Academic Press (N.Y.) 1970, pp. 52-65.
Gmitter et al., S.P.E. Journal, vol. 15, No. 11, Nov. 1959, pp. 957-960.

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