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Process for the preparation of coatings composed of polyhydroxy compounds

  • US 4,177,183 A
  • Filed: 04/21/1977
  • Issued: 12/04/1979
  • Est. Priority Date: 04/29/1976
  • Status: Expired due to Term
First Claim
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1. A coating binder composition, dissolved in solvents which do not contain active hydrogen atoms, composed of a binder (A) comprising a mixture of a copolymer which contains hydroxyl groups and which is a reaction product from mixtures of polymerizable vinyl compounds which contain α



  • -ethylenically unsaturated monocarboxylic acids and styrene and glycidyl esters and (B), polyisocyanate wherein component A consists of 60-80 percent by weight of hydroxyl group containing copolymers, having a total hydroxyl group content of 3.5 to 6.5 percent by weight, prepared in the presence of a mixture of a diacyl peroxide or perester and an alkyl hydroperoxide or dialkyl peroxide as polymerization initiators, from;

    (a) 5-24 percent by weight of glycidyl ester of alkanemonocarboxylic acids selected from the group consisting of α

    -alkyl-alkanemonocarboxylic acids and α



    -dialkylalkanemonocarboxylic acids of the following empirical formula C12-14 H20-26 O3, and slow, uniform addition to said glycidyl esters (a) of(b) 12-30 percent by weight of compounds selected from the group consisting of hydroxyethyl acrylate and hydroxyethyl methacrylate,(c) 1-10 percent by weight of acrylic acid,(d1) 20-50 percent by weight of styrene, and(d2) 5-35 percent by weight of methyl methacrylate,the components a, b, c, d1, and d2, based on 100 percent by weight of components a to d2, and the polymerization and condensation reactions taking place simultaneously and jointly, with the additional condition that components a, b, and c are employed in such quantities that the copolymer component A has a hydroxyl group content of 3.5 to 6.5 percent by weight, and component B consists of 20 to 40 precent by weight of an organic polyisocyanate, it being necessary that components A and B together give a numerical value of 100 percent by weight.

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