Self-crosslinking cationic paint binders containing urea and ure

Details Self-crosslinking cationic paint binders containing urea and ure Self-crosslinking cationic paint binders containing urea and ure

1987-12-03

1989-07-04

Pertilla, Theodore E.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

2041817, 524901, 525453, 525504, 525507, C08F 4000, C08L 6106

Patent

active

048451711

ABSTRACT:
A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea and urethane group carrying reaction products of modified phenols and monoepoxy compounds as well as with the binders produced according to this process and their use in stoving paints, particularly electrodeposition paints are described. The process is characterized in that a substituted urea-phenol-formaldehyde condensate obtained through reaction of an aminoalkylation product of a phenol, carrying an average of at least one secondary amino group with a semi-blocked diisocyanate, or a substituted urea prepared from a semi-blocked diisocyanate and an amine and further reacted with formaldehyde and a phenol, is reacted with a monoepoxy compound, the free aliphatic hydroxy groups of the reaction product being reacted in a further reaction step with di- or polyisocyanates. The paints formulated with these products, at stoving temperatures of from 150.degree. to 170.degree. C., give films with excellent corrosion resistance and adhesion.

REFERENCES:
patent: 3994989 (1976-11-01), Kempter et al.
patent: 4086292 (1978-04-01), Kempter et al.
patent: 4134932 (1979-01-01), Kempter et al.
patent: 4393179 (1983-07-01), Hoppe et al.

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