Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1990-03-30
1991-11-05
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521173, 521174, 521914, C08G 1800
Patent
active
050632531
ABSTRACT:
This invention relates to a process for the production of cold-setting flexible polyurethane foam useful for damping sound comprising reacting a polyisocyanate in the presence of water with (a) at least one polyether having an OH number of from 20 to 60 and containing at least two OH groups, wherein said polyether is based on 75 to 95% by weight propylene oxide and 5 to 25% by weight ethylene oxide; (b) a polyether or polyester having an OH number of from 150 to 400 and containing at least two OH groups; and (c) a polyether different from components (a) and (b) having an OH number of from 20 to 200 and containing at least two OH groups, wherein said polyether is based on propylene oxide and ethylene oxide and has an ethylene oxide content above 50% by weight based on the total amount of propylene oxide and ethylene oxide.
REFERENCES:
patent: 3857800 (1974-12-01), Fishbein et al.
patent: 3865762 (1975-02-01), Repiquet et al.
patent: 4008189 (1977-02-01), van Lewen et al.
patent: 4469823 (1984-09-01), Yeakey et al.
patent: 4929646 (1990-05-01), Nicholo et al.
Gansen Peter
Lindsey John J.
Wolf Klaus D.
Wolfgramm Rudi
Anderson Harold D.
Bayer Aktiengesellschaft
Gil Joseph C.
Henderson Richard E. L.
Mobay Corporation
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