# US 5,705,554 A · Heat resistant coating composition

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- Number: US 5,705,554 A
- Document ID: US5705554A
- Status: Granted
- Kind: A
- Application number: 08/499,834
- Filed: 1995-07-10
- Granted: 1998-01-06
- Earliest claimed: 1994-03-25
- Assignees: The B.F. Goodrich Company
- Inventors: Ti Chou; James Stanley Dodge; George Kletecka
- Web page: https://patentgrep.com/patent/US5705554A

## CPC

- C09D 5/18: Fireproof paints {including high temperature resistant paints}
- C09D 201/08: Carboxyl groups
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

A coating composition for use as an overcoat or heat resistant coating having improved heat resistance comprised of an aqueous latex polymer emulsion and a water soluble or water-dispersible resin which containing a sufficient number of either (a) carboxyl groups or (b) carboxyl and amide groups which will form at least one anhydride ring or imide, in the presence of sufficient heat, and release water molecules, with the latex polymer having a particle size of less than about 1600 Angstroms and containing an effective amount of a nitrogen containing volatile base to achieve a pH of greater than about 7.5 to keep the resin solubilized or dispersed.

## Claims

### Claim 1

A heat resistant coating composition having improved properties comprising 5 to less than 42 parts by weight of an aqueous latex polymer and more than 58 to 95 parts by weight of a water-soluble or water-dispersible resin, based upon 100 parts by weight of both the latex polymer and the water-soluble or water-dispersible resin, which water-soluble or water-dispersible resin is selected from the group consisting of a copolymer of maleic acid or anhydride with a monomer selected from the group consisting of styrene, methyl vinyl ether, (meth)acrylic acid, alpha methyl styrene, and combinations thereof, a copolymer of (meth)acrylic acid and styrene or alpha methyl styrene, and a copolymer of (meth)acrylic acid and an amide containing a vinyl group, and contains a sufficient number of either (a) carboxyl groups or (b) carboxyl and amide groups such that at least one anhydride ring or imide, respectively, will form in the presence of sufficient heat and release water to provide the coating with heat resistance, said latex polymer having a particle size of less than 1000 Angstroms and containing an effective mount of nitrogen-containing volatile base whereby the pH is greater than about 7.5, wherein said latex polymer is made by polymerizing latex monomers in the presence of said water-soluble or water-dispersible resin, and said coating composition provides heat resistance and a 60" gloss of greater than 58.4, as measured in accordance with ASTM Standard D-523.

### Claim 2 (depends on 1)

The composition of claim 1 wherein said latex polymer is a (meth)acrylate polymer.

### Claim 3 (depends on 1)

The composition of claim 1 wherein said latex polymer is polymer of butyl methacrylate, 2-ethyl hexyl acrylate and styrene.

### Claim 4 (depends on 1)

The composition of claim 1 wherein said latex polymer comprises, based on the 100 parts by weight of both the latex polymer and the water-soluble or water-dispersible resin:
10-30 parts by weight of butyl (meth)acrylate
5-25 parts by weight of 2-ethyl hexyl acrylate up to 5 parts by weight of styrene.

### Claim 5 (depends on 1)

The composition of claim 1 wherein said latex is selected from the group consisting of acrylic, vinyl chloride, vinyl acetate, and diene latexes and copolymers thereof.

### Claim 6 (depends on 1)

The composition of claim 1 wherein said coating composition comprises 35% by weight latex polymer and 65% by weight water-soluble or water-dispersible resin.

### Claim 7 (depends on 1)

The composition of claim 1 wherein the coating has a skid angle of greater than 25.degree..

### Claim 8 (depends on 1)

The composition of claim 1 wherein said latex polymer has a glass transition temperature of 50.degree. C. or less.