Catalyst-solvent system for polyester-based polyurethane foams c

Details Catalyst-solvent system for polyester-based polyurethane foams c Catalyst-solvent system for polyester-based polyurethane foams c

1981-12-07

1983-03-15

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252426, 521116, 521129, 528 49, 528 53, C08G 1814

Patent

active

043768326

ABSTRACT:
N-butylmorpholine and N,N'-dimethylpiperazine may be used together as a catalyst system in an activator solution to give finer, more uniform cells to polyester-based polyurethane foams if a solvent is employed. It was surprisingly discovered that the components must be used together as a catalyst-solvent system to avoid the disadvantages observed when one of the components is changed or left out. For example, if the solvent were not present in the activator solution in proportions of at least 1 wt. %, the activator solution would not be homogeneous.

REFERENCES:
patent: 3645925 (1972-02-01), Speranza et al.
patent: 3925582 (1975-12-01), Sample et al.
patent: 4012445 (1977-03-01), Priest et al.
patent: 4326042 (1982-04-01), Zimmerman

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