Claims
- 1. A method for producing a coating composition containing a vehicle as a major component, which comprises a step of mixing an acryl resin having a number-average molecular weight of from 1,800 to 8,000, a hydroxyl value of from 60 to 120, and an acid value of from 1 to 25 with a blocked alicyclic polyfunctional isocyanate hardener and then adding an alkyl-etherified melamine resin to the resulting mixture wherein the acryl resin is first mixed with the blocked alicyclic polyfunctional isocyanate and then the alkyl-etherified melamine resin is added.
- 2. A method as claimed in claim 1, wherein said coating composition comprises:
- (a) from 50 to 80 parts by weight of said acryl resin, and
- (b) from 50 to 20 parts by weight of said hardener
- wherein the proportion of said melamine resin to said isocyanate is from 70/30 to 90/10 by weight.
- 3. A method as claimed in claim 1, wherein from 65 to 75 parts by weight of said acryl resin mixed with from 35 to 25 parts by weight of said hardener.
- 4. A method as claimed in claim 1, wherein said blocked alicyclic polyfunctional isocyanates are a blocked isophorone diisocyanate or derivative thereof.
- 5. A method as recited in claim 1, wherein the proportion of said melamine resin to isocyanate in said hardener is from 75/25 to 85/15 by weight.
- 6. A method as recited in claim 1, wherein the acid value of the acrylic resin is from 8 to 15.
- 7. A method as recited in claim 1, wherein the number-average molecular weight of the acrylic resin is from 3500 to 5500.
Parent Case Info
This application is a continuation of application Ser. No. 07/783,223, filed Oct. 28, 1991 now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
59-36112 |
Feb 1984 |
JPX |
60-67515 |
Apr 1985 |
JPX |
61-143472 |
Jul 1986 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
783223 |
Oct 1991 |
|