Powdered azo pigments with improved rheological properties, proc

Details Powdered azo pigments with improved rheological properties, proc Powdered azo pigments with improved rheological properties, proc

1990-05-02

1991-11-19

Bleutge, John C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

428407, 524190, 4272133, 42721336, C08K 904, B32B 516

Patent

active

050666878

ABSTRACT:
Powdered azo pigments with improved rheological properties for use in paint systems on an alkyd/melamine, acrylic/melamine, acrylate/isocyanate or polyester/isocyanate basis, both of a conventional nature and also of a modern nature of the "high solids" type, to which--as appropriate before, during or after finishing--1 to 20% by weight of the active substance of a paint additive of the polyurethane series, prepared by reacting polyisocyanurates which still carry free isocyanate groups and are based on toluylene diisocyanate, hexamethylene diisocyanate or mixtures thereof, with (1) aliphatic mono- or polyhydroxycarbonylic acid C.sub.1 -C.sub.20 -alkyl esters (degree of polycondensation 2-50), (2) polyethylene glycols (molecular weight 500-1,500) and (3) 5- or 6-membered, saturated or unsaturated heterocyclic compounds which contain at least one nitrogen atom in the ring and reactive amino or hydroxy-C.sub.1 -C.sub.6 -alkyl groups, until isocyanate groups are no longer detectable, has/have been applied, a process for their preparation and their use for pigmenting paint systems.

REFERENCES:
patent: 4029861 (1977-06-01), Jones
patent: 4032698 (1977-06-01), Ashe
patent: 4048207 (1977-09-01), Jones
patent: 4070388 (1978-01-01), Jones
patent: 4386195 (1983-05-01), Bremer et al.
patent: 4647647 (1987-03-01), Haubennestel et al.

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