Aqueous urethane/acrylic resins with branched chain extension an

Details Aqueous urethane/acrylic resins with branched chain extension an Aqueous urethane/acrylic resins with branched chain extension an

1996-12-20

1998-12-29

Sergent, Rabon

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...

524501, 524591, 524840, 525123, 525127, 525128, 525130, 525131, 525454, 525455, 528 71, C08J 305, C08J 303, C08L 7504, C09D17504

Patent

active

058543325

ABSTRACT:
Aqueous dispersions of urethane polymers and vinyl polymers (e.g., acrylics) that provide water-based coating compositions with good adhesion following humidity exposure are further improved by providing branching chain extension of the polyurethane. The branched polymers provide improved metallic pigment orientation in coating compositions. Branching is provided by the use of chain extending agents selected from polyamines having at least three primary amine groups and polyols having at least three hydroxyl groups. The vinyl monomers are polymerized in the presence of the aqueously dispersed polyurethane.

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