Use of polyisocyanates or polyisocyanate mixtures as additives f

Details Use of polyisocyanates or polyisocyanate mixtures as additives f Use of polyisocyanates or polyisocyanate mixtures as additives f

1986-07-31

1987-12-08

Schofer, Joseph L.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C08K 529

Patent

active

047119187

ABSTRACT:
The present invention is directed to a process for improving the coatings properties of aqueous emulsion paints having a binder based on homo or copolymers of olefinically unsaturated monomers substantially free from urethane groups by adding at least one organic polyisocyanate having a viscosity at 23.degree. C. of about 50 to 4000 mPa.s, wherein the organic polyisocyanate has aliphatically and/or cycloaliphatically bound isocyanate groups and an isocyanate functionality of at least 3, optionally in combination with other organic polyisocyanates containing aliphatically and/or cycloaliphatically bound isocyanate groups and having an isocyanate functionality of 2, provided that the average functionality is at least 2.2.
The present invention is also directed to the ready for use aqueous emulsion paints prepared by the above process.

REFERENCES:
patent: 3580886 (1971-05-01), Stewart et al.
patent: 4186118 (1980-01-01), Reischl et al.
patent: 4327046 (1982-04-01), Davis et al.
patent: 4388358 (1983-06-01), Davis et al.
patent: 4605596 (1986-08-01), Fry

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