Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1981-05-04
1982-05-04
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 53, 528 52, C08G 1816
Patent
active
043283306
ABSTRACT:
The present invention relates to a process for the production of polyureas by reacting organic polyisocyanates containing blocked isocyanate groups with organic compounds containing at least two primary and/or secondary amino groups in the presence of catalysts which accelerate the condensation reaction of the above-mentioned starting materials, characterized in that compounds containing at least one guanidine group corresponding to the following formula: ##STR1## are used as catalysts.
REFERENCES:
patent: 3245961 (1966-04-01), Fetscher et al.
patent: 3740377 (1973-06-01), Huffman et al.
patent: 4248756 (1981-02-01), Konig et al.
Botta Artur
Gruber Hermann
Wellner Wolfgang
Bayer Aktiengesellschaft
Harsh Gene
Pope Lawrence S.
Roy Thomas W.
Welsh Maurice J.
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