Polymethylene polyphenylamine modified diamine chain extenders i

Details Polymethylene polyphenylamine modified diamine chain extenders i Polymethylene polyphenylamine modified diamine chain extenders i

1985-09-25

1987-05-19

Cockeram, Herbert 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...

252182, C08G 1810, C08G 1832, C09K 300

Patent

active

046670092

ABSTRACT:
Reaction injection molded polyurea elastomers are disclosed that are derived from the reaction of (1) an aromatic polyisocyanate; (2) primary or secondary amine terminated polyethers; and (3) an aromatic amine extender combination comprising (a) an aromatic diamine having at least one of the positions ortho to each amine group substituted by a lower alkyl group and (b) a polymethylene polyphenylamine.
The use of the polymethylene polyphenylamine component allows for the retention of the good physical properties of the prior art polyureas while at the same time effecting a cost reduction in the preparation of this useful class of polymers.

REFERENCES:
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patent: 4296212 (1981-10-01), Ewen et al.
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patent: 4433067 (1984-02-01), Rice et al.
patent: 4444910 (1984-04-01), Rice et al.
patent: 4448904 (1984-05-01), Dominguez
patent: 4530941 (1985-07-01), Turner et al.

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