Process for the production of elastic molded articles

Details Process for the production of elastic molded articles Process for the production of elastic molded articles

1982-11-22

1988-09-27

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 455, 264 51, 2643281, 2643286, 2643288, 521163, 521167, 528 68, 528 76, 528 77, C08G 1814

Patent

active

047742631

ABSTRACT:
Elastic molded articles having a closed surface layer are made from polyurea elastomers by the reaction injection molding technique. These polyurea elastomers are prepared from a polyisocyanate in which all of the isocyanate groups are aromatically bound, a polyether and a diamine. The polyether has at least two isocyanate-reactive groups and a molecular weight from 1800 to 12,000. At least 50% of the isocyanate-reactive groups in the polyether are pjrimary and/or secondary amino groups. The diamine has a molecular weight from 108 to 400 and primary and/or secondary aromatically bound amino groups. Known auxiliary agents and additives may also be employed.

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Abstract of Japanese publication 74018-74640.

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