Activated isocyanate prepolymers and a process for the productio

Details Activated isocyanate prepolymers and a process for the productio Activated isocyanate prepolymers and a process for the productio

1979-10-04

1982-05-18

Cockeram, H. S.

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 74, 528 44, C08G 1832, C08G 1876

Patent

active

043306560

ABSTRACT:
This invention relates to isocyanate prepolymers activated with alkyl ureas and to a two-stage process for the production of polyurethane elastomers based on 1,5-naphthylene diisocyanate, using alkyl ureas as activators.

REFERENCES:
patent: 3124543 (1964-03-01), Fowler et al.
patent: 3243389 (1966-03-01), Moeller et al.
patent: 3265761 (1966-08-01), Havlik et al.
patent: 3663506 (1972-05-01), Knopf et al.
patent: 3746689 (1973-07-01), Narayan
patent: 3769265 (1973-10-01), Groegler et al.
patent: 3795638 (1974-03-01), Groegler
patent: 4008185 (1977-02-01), Olstowski
patent: 4094827 (1978-06-01), McEntire
Saunders & Frisch-Polyurethanes, Part I, Interscience, N.Y. (1962) pp. 276-281.
Craven, "Reaction Rates of Isocyanates with Amines, ACS Symposium on Isocyanate Polymers, Sep. 1956, vol. 16, No. 3, p. 2 and Abstract.

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