Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2006-04-25
2006-04-25
Harlan, Robert D. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
active
07034080
ABSTRACT:
A coating composition comprises at least one pigment dispersed in an acrylic polymer, wherein the acrylic polymer is prepared by first polymerizing a mixture of ethylenically unsaturated monomers comprising:(a) at least about 15% by weight unsaturated meta-isopropenyl-α,α-dimethylbenzyl isocyanate;(b) at least one further aromatic polymerizable monomer, in an amount so that monomers (a) and (b) combined are at least about 50 percent by weight of the mixture of ethylenically unsaturated monomers; and(c) at least one alkyl (meth)acrylate to form a polymer, and secondly, reacting the isocyanate groups of the polymer with a(d) a hydroxyalkyl acid in which the hydroxy and acid groups are separated by at least four atoms or with a diol having both a primary hydroxyl group and a secondary hydroxyl group and then with a cyclic anhydrideand, optionally, with one or more members selected from the group consisting of (e) hydroxyethylene ethyl urea, (f) methoxypolyethylene glycols, and (g) other, different materials having a functional group reactive with isocyanate.
REFERENCES:
patent: 6376616 (2002-04-01), December
Balatan Sergio
Caiozzo Nicholas
Certo Clair J.
Czornij Zenon Paul
Echols Janice E.
BASF Corporation
Harlan Robert D.
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