Silane coated flavor/aroma barrier film
AssigneeDow Corning Corporation
InventorsDaniel Edward Futter, Ming-Hsiung Yeh
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Abstract
The present invention relates to the composition and preparation of composite films which exhibit low oxygen and flavor/aroma transmission rates. The film comprises a silane resin coated on a plastic substrate. The silane resin is formed from the mixture of a silane solution, an acrylate, a solvent, and optionally, either an additive, water or both. This invention teaches that a variety of silane solutions and acrylates may be mixed with different solvents to achieve the desired oxygen and flavor/aroma barrier characteristics.
Claims7
A coated article comprising:
- a layer of a silane mixture free of solvent and curable in air without irradiation disposed on a plastic substrate wherein said silane mixture consists essentially of
- (a) a silane having the formula:
- ##STR3## where R is a hydrocarbon radical having from one to four carbon atoms inclusive,
- R.sup.5, R.sup.6, R.sup.8 are selected from the group consisting of hydrogen, methyl and ethyl radicals, and at least one of R.sup.5, R.sup.6, or R.sup.8 is a hydrogen radical,
- R.sup.7 is a hydrocarbon radical having from two to four carbon atoms inclusive,
- R.sup.9 is a hydrocarbon radical having from three to six carbon atoms inclusive,
- (b) an acrylate selected from the group consisting of:
- ##STR4## where:
- R is as defined above,
- R.sup.10 is a hydrogen or methyl group,
- R.sup.11 is an alkyl or alkenyl group,
- R.sup.12 is an alkyl group, an alkenyl group, or a --(CH.sub.2).sub.n --O!.sub.x --(H.sub.2 C).sub.n group, where n is from 2 to 4, and x is from 1 to 6,
- q is 1 or 0, and
- Z is an oxygen, NH, NR, or NR.sup.11, where R is a hydrocarbon radical having from one to four carbon atoms inclusive, and R.sup.11 is an alkyl or alkenyl group.
A multi-layer construction consisting essentially of:
- a single layer of silicone resin disposed between a plastic substrate and a second substrate wherein said silicone resin is derived from a silane mixture consisting essentially of:
- (a) a silane having the formula:
- ##STR5## where:
- R is as defined above,
- R.sup.10 is a hydrogen or methyl group,
- R.sup.11 is an alkyl or alkenyl group,
- R.sup.12 is an alkyl group, an alkenyl group, or a --(CH.sub.2).sub.n --O!.sub.x --(H.sub.2 C).sub.n group, where each n is independently from 2 to 4, and x is from 1 to 6,
- q is 1 or 0, and
- Z is oxygen, NH, NR, or NR.sup.1, where R is a hydrocarbon radical having from one to four carbon atoms inclusive, and R.sup.11 is an alkyl or alkenyl group;
- and
- (c) and optionally, a solvent,
- wherein the plastic substrate and the second substrate are independently selected from the group consisting of polyethylene polypropylene, a polyethylene copolymer, a polyester, polyester coextrusions, laminates of polyesters and polyester coextrusions, polyamide, cellophane, polycarbonate, ethylene/vinyl alcohol copolymers, coated paper, coated cardboard, coextruded laminates, and polystyrene.
Dependencies are inferred from the claim text.