Process for the preparation of polyurethane (urea) masses which

Details Process for the preparation of polyurethane (urea) masses which Process for the preparation of polyurethane (urea) masses which

1990-12-11

1991-12-24

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C08G 1814

Patent

active

050753452

ABSTRACT:
The present invention is directed to a process for the preparation of foam-containing polyurethane (urea) masses comprising reacting an isocyanate prepolymer containing cation groups with water in the presence of fillers. The isocyanate prepolymer is prepared by first i) reacting a polyisocyanate with a first polyol which contains partly or completely quaternized tertiary nitrogen, said polyol being prepared by reacting a tertiary amine containing compound with from 3 to 8 moles of propylene oxide per mol of nitrogen to thereby form a semi-isocyanate prepolymer and then ii) reacting said semi-isocyanate prepolymer with a second polyol different from said first polyol, to form said isocyanate prepolymer.

REFERENCES:
patent: 4608397 (1986-08-01), Reischl
patent: 4734439 (1988-03-01), Reischl
patent: 4801621 (1989-01-01), Reischl
patent: 4855052 (1989-08-01), Reischl

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