Sag control of high solid polyurethane clearcoats by urea thixot

Details Sag control of high solid polyurethane clearcoats by urea thixot Sag control of high solid polyurethane clearcoats by urea thixot

1984-07-30

1985-09-10

Schofer, Joseph L.

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...

C08L 7500

Patent

active

045407347

ABSTRACT:
Novel, high solids urethane clearcoat compositions having improved flow characteristics by the incorporation of a flow control system composed of urea thixotrope/acrylic microgel additives. The urea thixotrope constituent is prepared by reacting a polyether polyol with a stoichiometric excess of a saturated cyclic aliphatic polyisocyanate to produce isocyanate-terminated prepolymers. These prepolymers are then modified by reaction with an ethanolamine to form urea end-capped thixotropes which are compatible in structure with any urethane clearcoat system. A combination of one of these urea thixotropes and a polymethyl methacrylate microgel of fine particle size is used effectively to reduce sagging of high solids urethane clearcoat systems. In fact, the combination of the two components produces a synergistic effect which is greater than that expected from any one of the components in the flow control system.

REFERENCES:
patent: 3652490 (1972-03-01), Gager
patent: 3893956 (1975-07-01), Brandt
patent: 4017456 (1977-04-01), Tucker et al.
patent: 4122055 (1978-10-01), Tugukuni et al.
patent: 4180489 (1979-12-01), Andrew et al.
patent: 4180619 (1979-12-01), Makhlouf et al.
patent: 4311622 (1982-01-01), Buter
patent: 4314933 (1982-02-01), Berner
patent: 4383068 (1983-05-01), Brandt
patent: 4387194 (1983-06-01), Ottaviani et al.
patent: 4452834 (1984-06-01), Nachtkamp et al.

Affiliated with

Also associated with

Rating

Sag control of high solid polyurethane clearcoats by urea thixot does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sag control of high solid polyurethane clearcoats by urea thixot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sag control of high solid polyurethane clearcoats by urea thixot will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1429136