Preparation of water-soluble condensates and their use as crossl

Details Preparation of water-soluble condensates and their use as crossl Preparation of water-soluble condensates and their use as crossl

1981-01-15

1982-05-04

Pertilla, Theodore E.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

162164R, 162164EP, 525420, 525430, 528421, C08L 6300

Patent

active

043281427

ABSTRACT:
A process for the preparation of water-soluble polymeric crosslinking agents by a two-stage reaction of di-secondary diamines with epichlorohydrin and/or dichlorohydrin, wherein, in the first stage, di-secondary diamines are condensed with epichlorohydrin and/or dichlorohydrin in a molar ratio of from 1:0.5 to 1:1 at a pH of from 9 to 12, and in the second stage the condensates obtained in the first stage are reacted with additional epichlorohydrin and/or dichlorohydrin at a pH of from 4 to 8.5. The water-soluble condensates thus obtained are crosslinking agents for polyamines, polyamidoamines, ethyleneimine-modified polyamidoamines and polyether-amines. The crosslinking reaction gives water-soluble condensates, which possess a high cation activity and may be used as retention aids, drainage aids and flocculants in the manufacture of paper.

REFERENCES:
patent: 2849411 (1958-08-01), Lehmann et al.
patent: 3215654 (1965-11-01), Schmalz
patent: 3947383 (1976-03-01), Baggett
Epoxy Resins, Chemistry and Technology, 1973, p. 55; May et al., Marcel Dekker Inc. N.Y.

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