Non-aqueous polymer dispersion and curable compositions

• US 5,929,158 A
• Filed: 05/05/1998
• Issued: 07/27/1999
• Est. Priority Date: 12/18/1996
• Status: Expired due to Fees

• Current Assignee: Kansai Paint Company Limited
• Original Assignee: Kansai Paint Company Limited
• Inventors: Ikushima, Satoshi, Nagano, Chihiro, Matsuno, Yoshizumi, Numa, Nobushige, Okumura, Yasumasa
• Primary Examiner(s): Michl, Paul R.
• Application Number:
  US09/072,461
• Time in Patent Office: 448 Days
• Field of Search: 524/520
• US Class Current: 524/520
• CPC Class Codes: C08F 2/08 with the aid of dispersing agents for the polymer
• CPC Class Codes: C08F 20/22 Esters containing halogen

Abstract

The invention provides a non-aqueous polymer dispersion wherein a particulate polymer is dispersed in an organic solvent containing a dispersion stabilizer resin, the polymer being insoluble to the organic solvent and containing a fluoroalkyl group-containing (meth)acrylate as a monomer component. The invention further provides a curable composition comprising the non-aqueous polymer dispersion, a hydroxyl group containing resin and at least one crosslinking agent selected from the group consisting of amino resins, tris(alkoxycarbonylamino)triazines, polyisocyanate compounds and blocked polyisocyanate compounds. A highly stain-resistant coating film can be formed using the dispersion or composition of the invention.

Claims

1. A curable composition which comprises a non-aqueous polymer dispersion comprising a particulate polymer dispersed in an organic solvent containing a dispersion stabilizer resin, the polymer being insoluble to the organic solvent and containing a fluoroalkyl group-containing (meth)acrylate as a monomer component;

a hydroxyl group-containing resin and at least one crosslinking agent selected from the group consisting of amino resins, tris(alkoxycarbonylamino)triazines, polyisocyanate compounds and blocked polyisocyanate compounds.

2. A composition according to claim 1 wherein the hydroxyl group-containing resin has a weight average molecular weight of about 1,000 to about 150,000.

3. A composition according to claim 1 wherein the hydroxyl group-containing resin has a hydroxyl value of about 20 to about 200 mg KOH/g.

4. A composition according to claim 1 wherein the crosslinking agent is at least one crosslinking agent selected from the group consisting of melamine resins, urea resins and tris(alkoxycarbonylamino)triazines.

5. A composition according to claim 1 wherein the proportions of the hydroxyl group-containing resin and crosslinking agent based on the total amount of these two components are that the former is 50 to 90% by weight and the latter is 50 to 10% by weight, and the proportion of the non-aqueous polymer dispersion is 0.5 to 40 parts by weight, calculated as solids, per 100 parts by weight of the total amount of the hydroxyl group-containing resin and crosslinking agent.