Preparation of water-dispersible alkyd resin

Abstract

Abstract PURPOSE:To prepare a water-dispersible alkyd resin especially suitable as a vehicle of a water-based paint, by reacting an OH-containing alkyd resin with a polyoxyalkylenedicarboxylic acid having carboxyl groups at both terminals, and neutralizing the product. CONSTITUTION:A water-dispersible alkyd resin is prepared by reacting (A) an oil-modified (un)saturated alkyd resin having a hydroxyl value of 100-200 (preferably 120-180) with (B) a polyoxyalkylenedicarboxylic acid having carboxyl groups at both terminals and having a molecular weight of 400-20,000 (preferably 2,000-6,000), and neutralizing the reaction product with an alkaline compound. The resin (A) can be prepared by the condensation polymerization of a polybasic acid, a polyhydric alcohol, a (non-)drying oil, etc. until the acid value of the product reaches <=10 (preferably <=9). The carboxylic acid (B) is preferably polyoxyethylenedicarboxylic acid, polyoxypropylenedicarboxylic acid, etc., and the reaction temperature with the resin (A) is preferably 160-250 deg.C.

Inventors

• 👤 Akira Oota
• 👤 彰 太田
• 👤 Saburo Fukushima
• 👤 福島　三郎

Bibliographic Details