Aminoplast-anchored ultraviolet light stabilizers

Details Aminoplast-anchored ultraviolet light stabilizers Aminoplast-anchored ultraviolet light stabilizers

1995-05-23

1996-08-20

Acquah, Samuel A.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

428364, 4284231, 4284258, 428460, 428524, 427256, 427331, 427340, 4273722, 427384, 427487, 427505, 427506, 528129, 528248, 528249, 528254, 525480, 525509, 525534, B32B 1900, C08G 1230

Patent

active

055477534

ABSTRACT:
Novel aminoplast anchored UV stabilizers are provided. Compared to unanchored stabilizers, the anchored stabilizers disclosed herein have increased compatibility with coating resins and have reduced volatility due to higher molecular weights resulting from anchoring. A process for preparing the anchored stabilizers by the reaction of unanchored stabilizers with alkoxymethylated aminoplasts in a sulfuric acid medium is also provided. The unanchored stabilizers include 2-(2-hydroxyaryl)benzotriazoles, 2-hydroxybenzophenones, 2-(2-hydroxyaryl)-4,6-diaryl-1,3,5-tri-azines, salicylic acid derivatives, 2-hydroxyoxanilides, and blocked derivatives thereof as well as mixtures of two or more stabilizers. The aminoplasts include alkoxymethylated derivatives of glycolurils, melamines, and benzoguanamines.

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