Primers and a method of coating in which they are used
AssigneeBASF Coatings Japan Ltd.
InventorsKazuaki Echizen, Toshiya Kitamura
Life of this patent
Estimating the term…
Abstract
Disclosed is a primer having from 50 to 90 mass % of (A) a chlorinated polyolefin resin having a chlorine content of from 5 to 50 mass % and a weight average molecular weight of from 1,000 to 100,000, from 45 to 5 mass % of (B) a blocked polyisocyanate compound, from 45 to 5 mass % of (C) a polyol resin having a hydroxyl group value of from 30 to 120 mgKOH/g and a weight average molecular weight from 5,000 to 50,000, from 0.5 to 12 mass % of (D) a diol having a weight average molecular weight of from 120 to 1,000 and from 0.01 to 1.5 mass % of (E) a hardening catalyst, wherein the proportions are with respect to the total mass of the resin solid fraction of the (A), (B), and (C) components.
Claims8
A primer, comprising:
- (A) from 50 to 90 mass % of a chlorinated polyolefin resin comprising a chlorine content of from 5 to 50 mass % and a weight average molecular weight of from 1,000 to 100,000,
- (B) from 45 to 5 mass % of a blocked polyisocyanate compound,
- (C) from 45 to 5 mass % of a polyol resin comprising a hydroxyl group value of from 30 to 120 mgKOH/g and a weight average molecular weight of from 5,000 to 50,000,
- (D) from 0.5 to 12 mass % of a diol comprising a weight average molecular weight from 120 to 1,000 and
- (E) from 0.01 to 1.5 mass % of a hardening catalyst,
- wherein the mass % proportions are based on the total mass of resin solid fractions of (A), (B) and (C).
A primer, comprising
- (A) from 60 to 80 mass % of a chlorinated polyolefin resin comprising a chlorine content of from 18 to 25 mass % and a weight average molecular weight of from 10,000 to 80,000,
- (B) from 30 to 10 mass % of a blocked polyisocyanate compound,
- (C) from 30 to 10 mass % of a polyol resin comprising a hydroxyl group value of from 40 to 70 mgKOH/g, an acid value of from 0 to 25 mg KOH/g, and a weight average molecular weight of from 7,000 to 20,000,
- (D) from 1.5 to 8 mass % of a diol comprising a weight average molecular weight from 120 to 800 and
- (E) from 0.05 to 0.8 mass % of a hardening catalyst comprising at least one of a tin compound or a zinc compound,
- wherein the mass % proportions are based on the total mass of resin solid fractions of (A), (B) and (C).
Dependencies are inferred from the claim text.