Polyester primer composition

Details Polyester primer composition Polyester primer composition

C - Chemistry, Metallurgy

09

D

117/197, 400/574

C09D 167/02 (2006.01) B32B 15/08 (2006.01) B32B 27/36 (2006.01) C09D 161/28 (2006.01) C09D 167/00 (2006.01)

Patent

CA 1325489

Title POLYESTER PRIMER COMPOSITION ABSTRACT A primer composition primarily for the end of line repair of automobiles and trucks that has excellent adhesion to all types of substrates such as metal and plastics, and contains solvents and a film forming binder and pigments; wherein the binder contains about (1) 50-85 % by weight, based on the weight of the binder, of a polyester of an alkylene diol, trimethlylol alkane, an aromatic dicarboxylic acid and a saturated aliphatic dicarboxylic acid having 3-10 carbon atoms wherein the hydroxyl groups of the polyester are esterified with an acid anhydride: the polyester copolymer has an acid no. of about 30-100, a hydroxyl number of about 50-120, a number average molecular weight of about 500-3,000 and a weight average molecular weight of about 1,000-6,000; and (2) 15-50% by weight, based on the weight of binder, of a methylated and butylated melamine formaldehyde agent having a degree of polymerization of about 1.5-2.0

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