Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1992-07-28
1993-09-21
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
528 59, 528 60, C08G 1810
Patent
active
052469778
ABSTRACT:
This invention relates to a process for preparing microcellular polyurethane polymers by reaction of an organic polyisocyanate composition comprising a 4,4'-methylene diphenylisocyanate, isocyanate-terminated poly(oxytetramethylene) glycol prepolymer with an active hydrogen-containing composition which comprises a polyether polyol and a chain-extending agent, in the presence of a blowing agent comprising water. Resulting polymers display good physical properties including abrasion resistance and durability and are of value in shoe soles applications and automotive applications.
REFERENCES:
patent: 4374210 (1983-02-01), Ewen et al.
patent: 4739027 (1988-04-01), Mendelsohn et al.
patent: 4771083 (1988-09-01), Altournian
patent: 5091437 (1992-02-01), Lunardon et al.
Johnson Rachel
Kight III John
The Dow Chemical Company
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