Claims
- 1. A primer coating composition for silicone release coatings, comprising, before dilution with water, from 25 to 75% by weight glycidoxy silane and from 75 to 25% by weight copolyester, wherein said copolyester comprises:
- a) from about 40 to 98 mol percent isophthalic acid;
- b) from about 0 to about 50 mol percent of at least one aliphatic dicarboxylic acid;
- c) from about 2 to about 20 mol percent of at least one sulfomonomer containing a sulfonate group attached to a dicarboxylic nucleus; and
- d) about 100 mol percent of glycol having from about 2 to 11 carbon atoms.
- 2. The primer coating composition of claim 1, wherein said glycidoxy silane is represented by the formula X-Y-Si-R.sub.1 R.sub.2 R.sub.3, wherein X is a glycidoxy group, Y is an alkylene group, R.sub.1 and R.sub.2 are hydrolyzable groups, and R.sub.3 is a hydrolyzable or non-hydrolyzable group.
- 3. The primer coating composition of claim 2, wherein said glycidoxy silane is glycidoxypropyltrimethoxysilane or glycidoxypropylmethyldiethoxysilane.
- 4. The primer coating composition of claim 1, wherein said aliphatic dicarboxylic acid is selected from the group consisting of malonic, adipic, azelaic, glutaric, sebacic, suberic, succinic, brassylic and mixtures thereof.
- 5. The primer coating composition of claim 1, wherein said sulfomonomer is represented by the formula: ##STR4## wherein M is a monovalent cation selected from the group consisting of an alkali metal, ammonium, substituted ammonium, and quaternary ammonium; Z is a trivalent radical; and X and Y are carboxyl groups or polyester forming equivalents.
- 6. The primer coating composition of claim 5, wherein said sulfomonomer is selected from the group consisting of ammonia sulfoterephthalic acid, alkali metal sulfoterephthalic acid, ammonium 5-sulfoisophthalic acid, alkali metal 5-sulfoisophthalic acid, ammonium sulfophthalic acid, alkali metal sulfophthalic acid, 5-(p-ammoniumsulfophenoxy)-isophthalic acid, and 5-(sulfopropoxy)-isophthalic acid, sodium salt.
- 7. The primer coating composition of claim 1, wherein said glycol is selected from the group consisting of ethylene glycol; butanediol; 1,5-pentanediol; 1,6-hexanediol; neopentyl glycol; 1,10-decanediol; cyclohexanedimethanol; and diethylene glycol.
- 8. The primer coating composition of claim 1, wherein said glycidoxysilane is glycidoxypropyltrimethoxysilane, said sulfomonomer is sodium 5- sulfoisophthalic acid, and said glycol is ethylene glycol.
Parent Case Info
This application is a continuation-in-part of U.S. Ser. No. 07/609,869 filed Nov. 7, 1990 now U.S. Pat. No. 5,077,353.
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Number |
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Date |
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4478907 |
Van Gossum et al. |
Oct 1984 |
|
4493872 |
Funderburk |
Jan 1985 |
|
4880700 |
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Foreign Referenced Citations (1)
Number |
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64-5838 |
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JPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
609869 |
Nov 1990 |
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