Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1988-01-29
1988-10-11
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521124, 521159, 521163, 521174, 524724, 528 52, 528 53, 528 56, 528 76, 528 77, 25218311, C08G 1814
Patent
active
047771879
ABSTRACT:
The present invention is directed to a process for the production of polyurethane or polyurea elastomeric molded articles according to the reaction injection molding process by reacting a polyisocyanate, a high molecular weight isocyanate reactive component and optionally a diamine chain extender, wherein the improvement is based on the use of the reaction product of a polyepoxide containing at least two epoxide groups with at least one mol of an aromatic diamine per epoxide group wherein the polyepoxide is present in an amount sufficient to provide about 0.5 to 25% by weight of the polyepoxide based on the weight of all the isocyanate reactive components. The present invention is also directed to the isocyanate reactive components for use in this process and to the molded articles produced in accordance with this process.
REFERENCES:
patent: 4218543 (1980-08-01), Weber et al.
patent: 4296212 (1981-10-01), Ewen et al.
patent: 4324867 (1982-04-01), Patton, Jr. et al.
patent: 4374210 (1983-02-01), Ewen et al.
patent: 4540750 (1985-09-01), Ham
patent: 4569951 (1986-02-01), Nelson
Schafer Hermann
Weber Christian
Bayer Aktiengesellshaft
Gil Joseph C.
Harsh Gene
Roy Thomas W.
Welsh Maurice J.
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