Polyurethane dispersions and the use thereof as finishing agents

Details Polyurethane dispersions and the use thereof as finishing agents Polyurethane dispersions and the use thereof as finishing agents

1988-12-15

1989-10-24

Ivy, C. Warren

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524591, 524375, C08K 554, C08K 506, C08L 7504, C08L 7512

Patent

active

048763020

ABSTRACT:
The present invention is directed to aqueous coating compositions suitable for use as coating and finishing agents for surface coatings, preferably PVC or polyurethane coatings, based on sedimentation-stable polyurethane dispersions having a solids content of about 10-70% by weight wherein the polyurethane-urea solids material is based on polyester diols, low molecular weight diols and optionally triols, chemically incorporated hydrophilic groups, specific mixtures of diisocyanates and polyamine chain extenders having an average functionality of greater than 2 and wherein the aqueous preparations additionally contain alkoxylated dimethyl-polysiloxanes and water-soluble polyethylene oxides. The present invention is also directed to a process for applying top coats and finishes to surface coatings, preferably PVC or polyurethane surface coatings, wherein the above-described aqueous coating and finishing agents are used as the top coat and the coatings are cured at about 70.degree.-170.degree. C.

REFERENCES:
patent: 3262805 (1966-07-01), Aoki
patent: 4017493 (1977-04-01), Ferment et al.
patent: 4045600 (1977-08-01), Williams
patent: 4203883 (1980-05-01), Hangauer
patent: 4208311 (1980-06-01), Kinoshita et al.
patent: 4237264 (1980-12-01), Noll et al.
patent: 4306998 (1981-12-01), Wenzel et al.
patent: 4408008 (1983-10-01), Markusch
patent: 4594385 (1986-06-01), Thoma et al.

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