Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1982-07-19
1983-07-05
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
528 49, 528 62, 528 65, 528 66, 528 73, C08G 1838
Patent
active
043919570
ABSTRACT:
An elasticized addition product formed from (a) polyalkylene ether-polyols having a molecular weight of 500 to 10,000 and 2 to 6 C atoms in the alkylene radical and (b) polyisocyanates, the ratio of the NCO groups of the component (b) to the OH groups of the component (a) being 1.5:1 to 2.5:1, and the addition product of (a) with (b) is further reacted with hydroxyl compounds from the group comprising (c) imidazolidine of a particular formula and/or (d) hexahydropyrimidine derivatives of a particular formula in an approximately 1:1 ratio of NCO groups to the OH groups of the components (c) and/or (d), and is in the form of this reaction product and/or in the form of a hydrolysis product thereof. Mixtures based on (A) the said addition product as the curing agent and (B) epoxide compounds containing more than one epoxide group, if appropriate together with monoepoxide compounds, are used for the production of molded articles having controlled resilience properties, such as sheet-like structures, adhesive bonds and casting compositions.
REFERENCES:
patent: 2995530 (1961-08-01), Frisch et al.
patent: 4200725 (1980-04-01), Gras et al.
Hoechst Aktiengesellschaft
Welsh Maurice J.
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