Humidity resistant aqueous urethane resins based on hydrophobic

Details Humidity resistant aqueous urethane resins based on hydrophobic Humidity resistant aqueous urethane resins based on hydrophobic

1996-09-20

2000-07-11

Sergent, Rabon

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

523404, 523406, 523415, 523428, 523500, 523501, 524500, 524507, 524591, 524840, 525111, 525131, 525403, 525404, 525407, 525440, 525453, 525454, 525455, 528 71, 528 80, 528 81, 528 73, C09D17504, C09D17506, C08L 7504, C08G 1842

Patent

active

060874449

ABSTRACT:
A water reducible polyurethane resin for use in coating compositions is provided with humidity resistance at relatively low cost by employing a urethane prepolymer which is the reaction product of (i) a polyisocyanate, (ii) a polyhydroxy compound which is the reaction product of an organic acid and an epoxy compound, at least one of which includes a hydrocarbon group of at least six carbon atoms, and (iii) a monomer having an anionic group and functionality reactive with isocyanate. Preferred embodiments employ C.sub.36 dimer diacid and the propylene oxide ester of neodecanoic acid to make the polyhydroxy compound.

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