Non-isocyanate flexibilizer for coatings

Details Non-isocyanate flexibilizer for coatings Non-isocyanate flexibilizer for coatings

1992-07-07

1993-03-16

Welsh, Maurice J.

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

Synthetic resins

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

525424, 525440, 525452, 525457, 525458, 525459, 525460, 528 49, C08L 7500

Patent

active

051945037

ABSTRACT:
A non-isocyanate flexibilizer additive is provided which finds utility in coating systems such as alkyds, polyesters, acrylic/polyester, alkyd/acrylic, carboxy/epoxy, polyether/urethane, epoxy/polyester, other epoxy, and urea and melamine formaldehyde systems. The non-isocyanate functional flexibilizer has the formula; B--C(O)--NW--A--NX--C(O)--K wherein A is selected from the group consisting fundamentally of polyesters, polyamides, polyureas, polyurethanes, acrylics; biuret, allophonate and urethane extended polyesters; wherein B and K are selected from the group consisting of --OR and --Z--R'--SiOR".sub.(3-n) R"".sub.n wherein R' is a divalent lower alkyl radical of from 1 to 18 carbon atoms, R is a lower alkyl radical of from 1 to 18 carbon atoms, Z is a member selected from the group consisting of S and NR", W and X are selected from H and lower alkyl radicals of from 1 to 10 carbon atoms, wherein R", R" and R"" are H or a lower alkyl radical of from 1-18 carbon atoms, and wherein n is 0, 1 or 2. Also included are biuret and allophonate products of the above formula with isocyanate functional materials.

REFERENCES:
patent: 4329442 (1982-05-01), Pokovny

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