Polymer-containing polyether polyamines and a process for the pr

Details Polymer-containing polyether polyamines and a process for the pr Polymer-containing polyether polyamines and a process for the pr

1982-03-19

1985-07-30

Kight, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521137, 521134, 528 60, 528 64, 528 68, 528482, 528489, 560157, 560 24, 560159, 564 38, 564 57, 564 59, 564 61, 564511, 564512, C07C12715, C07C12724

Patent

active

045322660

ABSTRACT:
Polyether-based urethane-group-containing polyamines containing polymers and/or copolymers of unsaturated monomers and, optionally, urea and/or biuret and/or allophanate groups are produced by (a) reacting an NCO-prepolymer in aqueous alkaline solution at 0.degree. to 40.degree. C. to form a carbamate; (b) converting this carbamate to an amine by adding an ion exchanger to the reaction mixture; and (c) separating the polyamine from the reaction mixture. The NCO-prepolymers used as starting materials are prepolymers of (i) polyalkylene ether polyols having a molecular weight of from 1,000 to 10,000 containing from 1 to 60 wt. % of graft (co)polymers of unsaturated monomers; and (ii) excess molar quantities of organic polyisocyanate; and optionally, (iii) a low molecular weight chain-extending agent. The product polyamines have a molecular weight of from 1,000 to 10,000 and contain from 0.65 to 59.3 wt. % graft (co)polymer and from 0.11 to 2.9 wt. % terminal NH.sub.2 groups attached to the ethers by urethane groups in the polyisocyanate. The product polyamines are particularly useful in the production of polyurethanes.

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patent: 4286074 (1981-08-01), Davis et al.
patent: 4386218 (1983-05-01), Rasshofer et al.

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