Process for treating hydroxyl terminated liquid polymers

Details Process for treating hydroxyl terminated liquid polymers Process for treating hydroxyl terminated liquid polymers

1982-05-06

1984-04-10

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

560191, 560200, C07C12130, C07C 6748

Patent

active

044420390

ABSTRACT:
Hydroxyl terminated liquid polymers that are excessively active in reaction with organic diisocyanates may be deactivated by treating the hydroxyl terminated liquid polymer with phosphoric acid or sulfuric acid prior to reaction with the organic diisocyanate so that the hydroxyl terminated liquid polymer is adjusted to an acid number of at least about 6 but not greater than 12. The treated hydroxyl terminated liquid polymer can be used to prepare polyurethanes having improved low temperature properties flexibility and hydrolytic stability.

REFERENCES:
patent: 3285949 (1966-11-01), Siebert
patent: 3551471 (1970-12-01), Siebert
patent: 3551472 (1970-12-01), Siebert
patent: 4115415 (1978-09-01), Yoshihara et al.
patent: 4144395 (1979-03-01), Murphy et al.

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