Water dilutable, polyester polyols and their use in coating compositions

US5349041A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Harald Blum · Wachtendonk, DE
• Lothar Kahl · Bensberg, DE
• Nusret Yuva · Wermelskirchen, DE
• Manfred Bock · Leverkusen, DE

Key dates

• Filing date: May 12, 1993
• Grant date: Sep 20, 1994
• Expiry date: May 12, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S528/904
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to water dilutable, urethane group-containing polyester polyols having an acid number of 6 to 45 mg KOH/g, wherein 25 to 100% of the acid groups are neutralized by bases, a hydroxyl number of 20 to 250 mg KOH/g, a molecular weight (M.sub.w) of 2,000 to 150,000 and a urethane content (--NH--CO--O--) of 2 to 16% by weight, wherein the polyester polyol is the at least partly neutralized reaction product of PA0 a) 35 to 90% by weight of branched polyester polyols having a hydroxyl number of 40 to 600 and prepared from PA1 a1) 0 to 60% by weight of monocarboxylic acids, PA1 a2) 6 to 65% by weight of di- and/or tricarboxylic acids or their anhydrides, PA1 a3) 10 to 70% by weight of alcohols, PA1 a4) 0 to 35% by weight of monoalcohols, PA1 a5) 0 to 30% by weight of hydroxycarboxylic acids, aminocarboxylic acids, lactones, lactams and aminoalcohols and PA1 a6) 0 to 45% by weight of polycarbonate polyols, PA0 b) 0.5 to 8.5% by weight of hydroxycarboxylic acids PA0 c) 0 to 15% by weight of compounds containing OH, NH and/or NH.sub.2 groups and having a molecular weight of 32 to 500, PA0 d) 3 to 33% by weight of compounds containing isocyanate groups and having a…