Impermeable molded articles of cellular polyurethane elastomers

Details Impermeable molded articles of cellular polyurethane elastomers Impermeable molded articles of cellular polyurethane elastomers

1981-03-12

1982-09-21

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521111, 521159, 521163, 521170, C08G 1838

Patent

active

043507778

ABSTRACT:
This invention relates to an improved method of producing impermeable cellular polyurethane elastomers from polyisocyanates, relatively high molecular weight polyhydroxyl compounds and water as chain lengthening and blowing agent to which additional chain lengthening agents may be added and it is characterized by the use of certain silicone derivatives. The new method makes it possible for impermeable cellular molded articles to be produced without the necessity of forming a skin on the surface, of the kind known, for example, in integral skin foams.

REFERENCES:
patent: 3420782 (1969-01-01), Dahm et al.
patent: 4033912 (1977-07-01), Kleimann et al.
patent: 4042540 (1977-08-01), Lammerting et al.
patent: 4096162 (1978-06-01), Windemuth et al.
patent: 4163830 (1979-08-01), Windemuth et al.
patent: 4280007 (1981-07-01), Meisert et al.
Plastiques Modernes et Elastomeres, Band 29, Heft 4, May, 1977, pp. 64-66-69.
Plastiques Modernes et Elastomeres, Band 29, Heft 5, Jun. 1977, pp. 58-60.

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