Epoxy hardening agents

Details Epoxy hardening agents Epoxy hardening agents

1990-06-11

1991-12-10

Nielsen, Earl

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 73, 528369, 560158, C08G 5950

Patent

active

050719513

ABSTRACT:
A hardening agent for epoxy compounds prepared by reacting A) at least one member of the group consisting of polyalkyleneetherdiols and polyalkyleneetherpolyols with B) at least one polyisocyanate with a molar ratio of hydroxy groups to isocyanate group of 1:1.8 to 3, reacting the resulting product with C) an amine having at least one free primary or secondary amino group and at least one protected primary amino group with a molar ratio of isocyanate to amino groups of 1:1 to 2 and subjecting the latter product to hydrolysis useful for preparation of flexible hardened products with excellent mechanical properties.

REFERENCES:
patent: 4115360 (1978-09-01), Schulze et al.
patent: 4115361 (1978-09-01), Schulze et al.
patent: 4115446 (1978-09-01), Schulze
patent: 4122069 (1978-10-01), Meyer
patent: 4139524 (1979-02-01), Waddill
patent: 4146701 (1979-03-01), Waddill et al.
patent: 4178426 (1979-12-01), Waddill
patent: 4187367 (1980-02-01), Waddill
patent: 4562241 (1985-12-01), Renner

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