Process for producing crosslinking components for paint binders

Details Process for producing crosslinking components for paint binders Process for producing crosslinking components for paint binders

Filed on

1986-05-29

Date issued

1988-03-29

Examiner

Shippen, Michael L.

Patent Class

Organic compounds -- part of the class 532-570 series

SubClass

Organic compounds

SubSubClass

Carboxylic acid esters

Other Related Categories

558392, 558430, 558443, 560 24, 560 34, 560125, 560159, 560169, C07C125065

Type

Patent

Status

active

Patent number

047345209

Description

ABSTRACT:
Crosslinking components for hydroxy and/or primary and/or secondary amino group containing paint binders for the crosslinking of synthetic resins carrying at least two groups capable of ester or amide formation with carboxylic acids. In particular there is disclosed the use of the crosslinking components in compositions for electrodeposition (ED) whereby at 120.degree. C. and above coatings with extraordinary paint performance are obtained. The use of methyl or ethyl esters gives extremely low condensation losses. The crosslinking components are obtained through reaction of one mole of a diisocyanate, preferably at room temperature, in the presence of sodium, or preferably sodium phenolate, as catalyst, with at least one mole of a CH-active alkyl ester of the general formula X--CH.sub.2 --COOR, wherein X is --COOR, --CN or CH.sub.3 --CO-- and R is an alkyl radical with 1 to 8 C-atoms and subsequent reaction of the free isocyanate groups with polyamines of the general formula H.sub.2 N--(R--NH).sub.n --R--NH.sub.2, wherein n is 0 to 3 and/or (poly)aminoalcohols of the formula N.sub.2 H--(R--NH).sub.n --R--OH, wherein n is 0 to 3, or HO-- (R--NH).sub.n --R--OH, wherein n is 1 to 3, and R is an alkylene radical in all cases.

REFERENCES:
patent: 4165329 (1979-08-01), Dreher

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