Claims
- 1. A primer coated, polymeric film for use as a silicone release film, comprising:
- a) a polymeric film; and
- b) an effective amount of a primer coating applied to at least one side of said polymeric film, sufficient to improve the adhesion of silicone to said polymeric film, said prime coating comprising:
- i) from 25 to 75% by weight of a glycidoxysilane; and
- ii) from 75 to 25% by weight of a copolyester mixture, said copolyester mixture comprising:
- a) from about 65 to 98 mol percent isophthalic acid,
- b) from about 0 to about 30 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 coated film of claim 1, wherein said polymeric film is coated on both sides with said primer coating.
- 3. The primer coated polymeric film of claim 1, wherein said dried primer coating on said film is from about 1.times.10.sup.-7 to 1.times.10.sup.-4 inch thick.
- 4. The primer coated film 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.
- 5. The primer coated film of claim 4, wherein said glycidoxy silane is glycidoxypropyltrimethoxysilane or glycidoxypropylmethyldiethoxysilane.
- 6. The primer coated film of claim 1, wherein said aliphatic dicarboxylic acid is selected from the class consisting of malonic, adipic, azelaic, glutaric, sebacic, suberic, succinic, brassylic, and mixtures thereof.
- 7. The primer coated film 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.
- 8. The primer coated film of claim 7, wherein said sulfomonomer is selected from the class consisting of ammonium 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.
- 9. The primer coated film of claim 1, wherein glycol is selected from the class consisting of ethylene glycol; butanediol; 1,5-pentanediol; 1,6-hexanediol; neopentyl glycol; 1,10-decanediol; cyclohexanedimethanol; and diethylene glycol.
- 10. The primer coated film of claim 1, wherein said glycidoxysilane is glycidoxypropyltrimethoxysilane, said sulfomonomer is sodium 5-sulfoisophthalic acid, and said glycol is ethylene glycol.
- 11. The primer coated film of claim 1, wherein said polymeric film is selected from the class consisting of polyamides, polyolefins, polyesters, polyacetal, and polycarbonate.
Parent Case Info
This is a continuation of application Ser. No. 07/609,869 filed Nov. 7, 1990 now U.S. Pat. No. 5,077,353.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4493872 |
Funderburk |
Jan 1985 |
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4845189 |
Rudd et al. |
Jul 1989 |
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Foreign Referenced Citations (1)
Number |
Date |
Country |
64-5838 |
Jan 1989 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
609869 |
Nov 1990 |
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