Process for continuous control of the cell number of polyurethan

Details Process for continuous control of the cell number of polyurethan Process for continuous control of the cell number of polyurethan

1993-04-05

1994-03-22

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521170, 521917, 222 55, 222 57, C08G 1400

Patent

active

052965171

ABSTRACT:
The process for continuous control of cell number in the production of polyurethane foams from polyols, isocyanates and water, where mixing the components is effected in a mixing head with adjustable injection pressure and adjustable mixing chamber pressure, consists in that immediately prior to entering the mixing head the gas content of the isocyanate is continuously increased or reduced.

REFERENCES:
patent: 4526907 (1985-07-01), Thiele et al.
WO 92/01738 (Feb. 6, 1992).

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