Siloxane polymers and copolymers as barrier, coatings and method of producing barrier coating properties therewith

Claim 3

An improved gas impermeable oxygen barrier characteristic polymer film constituted of an organic oxygen barrier polymer film base to one or both surfaces of which is physically adsorbed a cross-linked siloxane non-electrically conductive coating that imbues the said surface(s) with improved gas, aroma, flavor, fragrance and grease and oil-impermeable surface characteristics, and in which said coating is produced by the method of claim 1.

Claim 4

A method as claimed in claim 1 and in which the grafting is effected with electron beam radiation.

Claim 5

A method as claimed in claim 1 or 3 in which the alcohol is methanol and the silane(s) are represented by the following formula: ##STR2## where the groups R1, R2, R3 and R4 may be the same or different and are selected from the following groups:

Claim 6

Alkoxide groups, such as methoxy, ethoxy, propoxy, 2-methoxyethoxy, etc.; 2. Acid groups, such as acetoxy, propoxy, etc.; 3. Alkyl groups, such as methyl, ethyl, propyl, butyl, amyl, benzyl, cyclohexyl, and higher alkyl groups;

Claim 7

Alkoxide groups, such as methoxy, ethoxy, propoxy, 2-methoxyethoxy, etc.; 2. Acid groups, such as acetoxy, propoxy, etc.; 3. Alkyl groups, such as methyl, ethyl, propyl, butyl, amyl, benzyl, cyclohexyl, and higher alkyl groups;

Claim 8

Aromatic groups, such s phenyl and alkylated phenyl groups, naphthyl, etc.; 5. Halogenated alkyl and aromatic groups, such as chloropropyl, 1,1,1-trifluoromethyl, trifluoropropyl, pentafluorophenyl, 3-(heptafluoroisopropoxy)propyl, 1H, 1H, 2H, 2H, perfluorodecyl, etc.; 6. Amine containing groups, such as 3-(2-aminoethylamino)propyl, gamma-aminopropyl, etc.; 7. Unsaturated groups such as ally, gamma(methacryloxy) propyl, vinyl, gamma(acryloxy)propyl, 3-(2-vinylbenzylaminoethyl) propyl, etc.; 8. Epoxy containing groups such as 3-(2,3-epoxypropyloxy) propyl; and 9. Mercapto containing groups such as 3-mercaptopropyl.

Claim 9

Aromatic groups, such s phenyl and alkylated phenyl groups, naphthyl, etc.; 5. Halogenated alkyl and aromatic groups, such as chloropropyl, 1,1,1-trifluoromethyl, trifluoropropyl, pentafluorophenyl, 3-(heptafluoroisopropoxy)propyl, 1H, 1H, 2H, 2H, perfluorodecyl, etc.; 6. Amine containing groups, such as 3-(2-aminoethylamino)propyl, gamma-aminopropyl, etc.; 7. Unsaturated groups such as ally, gamma(methacryloxy) propyl, vinyl, gamma(acryloxy)propyl, 3-(2-vinylbenzylaminoethyl) propyl, etc.; 8. Epoxy containing groups such as 3-(2,3-epoxypropyloxy) propyl; and 9. Mercapto containing groups such as 3-mercaptopropyl.

Claim 10

A method as claimed in claim 1 and in which the silane comprises a vinyl benzyl amine silane.

Claim 11

A method as claimed in claim 5 and in which the vinyl benzyl amine silane is cohydrolyzed with methyl trimethoxy silane.

Claim 12

A method as claimed in claim 6 and in which the ratios of said silanes by volume range from about 9 to 1.

Claim 13

A method as claimed in claim 1 and in which the silane comprises gamma aminopropyl triethoxysilane.

Claim 14

A method as claimed in claim 1 and in which the siloxane coating is applied in a thickness of the order of a few microns.

Claim 15

A method as claimed in claim 9 and in which the said thickness lies within the range of from about 5 to 22 microns.

Claim 16

A method as claimed in claim 1 and in which the grafting is effected by peroxide cure.

Claim 17

A polymer film constituted of an organic polymer film base to a surface of which is physically adsorbed a cross-linked siloxane non-electrically conductive coating that imbues the said surface with gas, aroma, flavor and fragrance and grease and oil impermeable surface characteristics, wherein the organic film base is selected from the group consisting of polyethylene, polypropylene, polyester, polyvinylidene dichloride, ethylene vinyl alcohol, acrylonitrile polymers and amorphous nylon, and wherein said coating is produced by a method comprising hydrolyzing silane monomers or mixtures of silane monomers in an aqueous alcohol solution and equilibrating the same, coating the same upon the organic film base, evaporating the alcohol and water to complete the formation of silicon-oxygen-silicon bonds and to cross-link the silane(s), thereby to produce a siloxane gas-impermeable barrier coating adhered to the surface of the organic film base, and chemically grafting said siloxane coating to the organic film base.

Claim 18

A polymer film constituted of an organic polymer film base to a surface of which is physically adsorbed a cross-linked siloxane non-electrically conductive coating that imbues the said surface with gas, aroma, flavor and fragrance and grease and oil impermeable surface characteristics, wherein the organic film base is selected from the group consisting of polyethylene, polypropylene, polyester, polyvinylidene dichloride, ethylene vinyl alcohol, acrylonitrile polymers and amorphous nylon, and wherein said coating is produced by a method comprising hydrolyzing silane monomers or mixtures of silane monomers in an aqueous alcohol solution and equilibrating the same, coating the same upon the organic film base, evaporating the alcohol and water to complete the formation of silicon-oxygen-silicon bonds and to cross-link the silane(s), thereby to produce a siloxane gas-impermeable barrier coating adhered to the surface of the organic film base, and chemically grafting said siloxane coating to the organic film base.

Claim 19

A polymer film as claimed in claim 12 and in which the said coating is of thickness in the range of about 5 to 22 microns.

Claim 20

A polymer film as claimed in claim 12 and in which the said coating imparts haze-reduction characteristics and clarity.

Claim 21

A polymer film as claimed in claim 12 and in which the silane precursor of the siloxane comprises a vinyl benzyl amine silane.

Claim 22

A polymer film as claimed in claim 15 and in which the vinyl benzyl amine silane is cohydrolyzed with methyl trimethoxy silane.

Claim 23

A polymer film as claimed in claim 16 and in which the ratios of said silanes by volume range from about 9 to 1.

Claim 24

A polymer film as claimed in claim 12 and in which the silane precursor of the siloxane comprises gamma aminopropyltriethoxy silane.