Antistatically conductive masking film for electrostatic spray painting

Claim 2

An antistatically conductive film suitable for masking during electrostatic spray painting said film comprising (1) a polymer containing carboxylic acid moieties and an antistatically effective amount of a quaternary amine, (2) a polyolefin and a particulate conductive filler, or (3) a mixture of (1) and (2).

Claim 3

The masking film of claim 1 wherein: (A) the polymer containing carboxylic moieties is a copolymer of (i) a major amount by mol % of an alpha-olefin of the fomula RCH=CH₂ wherein R is H or C₁ to C₈ alkyl, and (ii) a minor amount by mol % of an alpha,beta-ethylenically unsaturated car­boxylic acid, and (B) the quaternary amine is of the formula [(R¹)(R²)(R³)(R⁴)N]⁺ [X]⁻ wherein R¹ is selected from H, aryl, or C₁ to C₅₀ alkyl op­tionally having one or more non-contiguous C=O or NHC=O or -S- or -0- in the carbon chain, or the same as R²; each of R², R³, and R⁴ is the same or different and selected from H, C₁ to C₁₈ alkyl optionally substituted with one or more OH or from -(R⁵-O) a -H where a is an integer from 1 to 10 and R⁵ is ethylene or propylene; and X is an anion selected from chloride, bromide, iodide, nitrate, fluoborate, phosphate, C₁ to C₈ alkyl phos­phate, sulfate, C₁ to C₈ alkyl sulfate, formate, C₁ to C₈ alkyl or C₆ to C₂₄ alkaryl or aryl sulfonate, acetate, trifluoroacetate, citrate, propionate, tartrate or carbonate.

Claim 4

The masking film of claim 1 or 2 wherein the polymer containing carboxylic acid moieties is ethylene-acrylic acid or ethylene-methacrylic acid, the amine is of the formula wherein: R¹ is C₈ to C₂₀ alkyl, C₁₀OC₃, C₁₃OC₃, soya or tallow; R² and R³ are both CH₃ or C₂H₄OH, R⁴ is methyl or ethyl, and X is chloride, methyl sulfate or ethyl sulfate, the polyolefin is preferably selected from ethylene vinyl acetate, ethylene alkyl acrylate, polypropylene, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, very low density linear polyethylene, or mixtures thereof, and the particulate conductive filler is preferably selected from carbon,tin, nickel, zinc, copper, iron, aluminum, metallized mica, or mixtures thereof.

Claim 5

The masking film of claims 1-3 wherein said film is oriented and/or wherein at least one film layer has been irradiated at a dosage up to about 20 Mr (200 kilogrey).

Claim 6

The masking film of claims 1-4 wherein the polymer containing carboxylic acid moieties is an ionomer containing carboxylic acid moieties partially neutralized by a metal salt.

Claim 9

A permanently antistatically conductive film suitable for masking during electrostatic spray painting comprising a film obtained from mixing with heat and forming into a film (A) ethylene-acrylic acid or ethylene-methacrylic acid and (B) a quaternary amine of the formula [(R¹)(R²)(R³)(R⁴)N]⁺ [X]⁻ where R¹ is a C₄ to C₃₀ straight or branched alkyl optionally including one or more ether linkages, each of R² and R³ and R⁴ is the same or different and selected from methyl or ethyl, and X is chloride, methyl sulfate, or ethyl sulfate.

Claim 10

A permanently antistatically conductive film suitable for masking during electrostatic spray painting comprising a film obtained from mixing with heat and forming into a film (A) ethylene-acrylic acid or ethylene-methacrylic acid and (B) a quaternary amine of the formula [(R¹)(R²)(R³)(R⁴)N]⁺ [X]⁻ where R¹ is a C₄ to C₃₀ straight or branched alkyl optionally including one or more ether linkages, each of R² and R³ and R⁴ is the same or different and selected from methyl or ethyl, and X is chloride, methyl sulfate, or ethyl sulfate.

Claim 11

A film comprising one or more layers made of the acid co­polymer/quaternary amine of claim 7, which film will exhibit an electrostatic spray painting meter reading of about 90 or above.

Claim 12

A film comprising a 5-layer, antistatically conductive film suitable for masking during electrostatic spray painting and having the layers in direct surface-to-surface contact with each other in the following order: (1) a first layer, said layer being an outside layer comprising about 90% or more by weight of ethylene vinyl acetate co­polymer, (2) a second layer, said layer being an interior layer comprising about 65% or more by weight ethylene vinyl acetate copolymer, and about 35% or less by weight of a mixture of (A) a polymer containing carboxylic acid moieties and (B) an antistatically effective amount of a quaternary amine wherein: (A) the polymer containing carboxylic acid moieties is a copolymer of (i) a major amount by mol % of an alpha-olefin of the fomula RCH=CH₂ wherein R is H or C₁ to C₈ alkyl, and (ii) a minor amount by mol % of an alpha,beta-ethylenically unsaturated car­boxylic acid, and (B) the quaternary amine is of the formula [(R¹)(R²)(R³)(R⁴)N]⁺ [X]⁻ wherein R¹ is selected from H, aryl, or C₁ to C₅₀ alkyl op­tionally having one or more non-contiguous C=O or NHC=O or -S- or -0- in the carbon chain, or the same as R²; each of R², R³, and R⁴ is the same or different and selected from H, C₁ to C₁₈ alkyl optionally sub­stituted with one or more OH or from -(R⁵-O) a -H where a is an integer from 1 to 10 and R⁵ is ethylene or propylene; and X is an anion selected from chloride, bromide, iodide, nitrate, fluoborate, phosphate, C₁ to C₈ alkyl phosphate, sulfate, C₁ to C₈ alkyl sulfate, formate, C₁ to C₈ alkyl or C₆ to C₂₄ alkaryl or aryl sulfonate, acetate, citrate, trifluoroacetate, pro­pionate, tartrate or carbonate, (3) a third layer, said layer being a core layer comprising about 65% or more by weight of a mixture of linear low density polyethylene copolymer and ethylene vinyl acetate copolymer and about 35% or less by weight of a mixture of (A) a polymer containing carboxylic acid moieties and (B) an antistatically effective amount of a quaternary amine wherein: (A) the polymer containing carboxylic acid moieties is a copolymer of (i) a major amount by mol % of an alpha-olefin of the fomula RCH=CH₂ wherein R is H or C₁ to C₈ alkyl, and (ii) a minor amount by mol % of an alpha,beta-ethylenically unsaturated car­boxylic acid, and (B) the quaternary amine is of the formula [(R¹)(R²)(R³)(R⁴)N]⁺ [X]⁻ wherein R¹ is selected from H, aryl, or C₁ to C₅₀ alkyl op­tionally having one or more non-contiguous C=O or NHC=O or -S- or -0- in the carbon chain, or the same as R²; each of R², R³, and R⁴ is the same or different and selected from H, C₁ to C₁₈ alkyl optionally sub­stituted with one or more OH or from -(R⁵-O) a -H where a is an integer from 1 to 10 and R⁵ is ethylene or propylene; and X is an anion selected from chloride, bromide, iodide, nitrate, fluoborate, phosphate, C₁ to C₈ alkyl phosphate, sulfate, C₁ to C₈ alkyl sulfate, formate, C₁ to C₈ alkyl or C₆ to C₂₄ alkaryl or aryl sulfonate, acetate, citrate, trifluoroacetate, propionate, tartrate or carbonate. (4) a fourth layer, comprising an interior layer the same as layer (2), and (5) a fifth layer, comrising an outside layer the same as layer (1).

Claim 13

A film comprising a 5-layer, antistatically conductive film suitable for masking during electrostatic spray painting and having the layers in direct surface-to-surface contact with each other in the following order: (1) a first layer, said layer being an outside layer comprising about 90% or more by weight of ethylene vinyl acetate co­polymer, (2) a second layer, said layer being an interior layer comprising about 65% or more by weight ethylene vinyl acetate copolymer, and about 35% or less by weight of a mixture of (A) a polymer containing carboxylic acid moieties and (B) an antistatically effective amount of a quaternary amine wherein: (A) the polymer containing carboxylic acid moieties is a copolymer of (i) a major amount by mol % of an alpha-olefin of the fomula RCH=CH₂ wherein R is H or C₁ to C₈ alkyl, and (ii) a minor amount by mol % of an alpha,beta-ethylenically unsaturated car­boxylic acid, and (B) the quaternary amine is of the formula [(R¹)(R²)(R³)(R⁴)N]⁺ [X]⁻ wherein R¹ is selected from H, aryl, or C₁ to C₅₀ alkyl op­tionally having one or more non-contiguous C=O or NHC=O or -S- or -0- in the carbon chain, or the same as R²; each of R², R³, and R⁴ is the same or different and selected from H, C₁ to C₁₈ alkyl optionally sub­stituted with one or more OH or from -(R⁵-O) a -H where a is an integer from 1 to 10 and R⁵ is ethylene or propylene; and X is an anion selected from chloride, bromide, iodide, nitrate, fluoborate, phosphate, C₁ to C₈ alkyl phosphate, sulfate, C₁ to C₈ alkyl sulfate, formate, C₁ to C₈ alkyl or C₆ to C₂₄ alkaryl or aryl sulfonate, acetate, citrate, trifluoroacetate, pro­pionate, tartrate or carbonate, (3) a third layer, said layer being a core layer comprising about 65% or more by weight of a mixture of linear low density polyethylene copolymer and ethylene vinyl acetate copolymer and about 35% or less by weight of a mixture of (A) a polymer containing carboxylic acid moieties and (B) an antistatically effective amount of a quaternary amine wherein: (A) the polymer containing carboxylic acid moieties is a copolymer of (i) a major amount by mol % of an alpha-olefin of the fomula RCH=CH₂ wherein R is H or C₁ to C₈ alkyl, and (ii) a minor amount by mol % of an alpha,beta-ethylenically unsaturated car­boxylic acid, and (B) the quaternary amine is of the formula [(R¹)(R²)(R³)(R⁴)N]⁺ [X]⁻ wherein R¹ is selected from H, aryl, or C₁ to C₅₀ alkyl op­tionally having one or more non-contiguous C=O or NHC=O or -S- or -0- in the carbon chain, or the same as R²; each of R², R³, and R⁴ is the same or different and selected from H, C₁ to C₁₈ alkyl optionally sub­stituted with one or more OH or from -(R⁵-O) a -H where a is an integer from 1 to 10 and R⁵ is ethylene or propylene; and X is an anion selected from chloride, bromide, iodide, nitrate, fluoborate, phosphate, C₁ to C₈ alkyl phosphate, sulfate, C₁ to C₈ alkyl sulfate, formate, C₁ to C₈ alkyl or C₆ to C₂₄ alkaryl or aryl sulfonate, acetate, citrate, trifluoroacetate, propionate, tartrate or carbonate. (4) a fourth layer, comprising an interior layer the same as layer (2), and (5) a fifth layer, comrising an outside layer the same as layer (1).

Claim 14

An antistatically conductive film suitable for masking during electrostatic spray painting said film comprising (A) a polymer containing carboxylic acid moieties and (B) an antistatically effective amount of a quaternary amine wherein: (A) the polymer containing carboxylic moieties is a copolymer of (i) a major amount by mol % of an alpha-olefin of the fomula RCH=CH₂ wherein R is H or C₁ to C₈ alkyl, and (ii) a minor amount by mol % of an alpha,beta-ethylenically unsaturated car­boxylic acid, and (B) the quaternary amine is of the formula [(R¹)(R²)(R³)(R⁴)N]⁺ [X]⁻ wherein R¹ is selected from H, aryl, or C₁ to C₅₀ alkyl op­tionally having one or more non-contiguous C=O or NHC=O or -S- or -0- in the carbon chain, or the same as R²; each of R², R³, and R⁴ is the same or different and selected from H, C₁ to C₁₈ alkyl optionally sub­stituted with one or more OH or from -(R⁵-O) a -H where a is an integer from 1 to 10 and R⁵ is ethylene or propylene; and X is an anion selected from chloride, bromide, iodide, nitrate, fluoborate, phosphate, C₁ to C₈ alkyl phosphate, sulfate, C₁ to C₈ alkyl sulfate, formate, C₁ to C₈ alkyl or C₆ to C₂₄ alkaryl or aryl sulfonate, acetate, citrate, trifluoroacetate, propionate, tartrate or carbonate.

Claim 15

An antistatically conductive film suitable for masking during electrostatic spray painting said film comprising (A) a polymer containing carboxylic acid moieties and (B) an antistatically effective amount of a quaternary amine wherein: (A) the polymer containing carboxylic moieties is a copolymer of (i) a major amount by mol % of an alpha-olefin of the fomula RCH=CH₂ wherein R is H or C₁ to C₈ alkyl, and (ii) a minor amount by mol % of an alpha,beta-ethylenically unsaturated car­boxylic acid, and (B) the quaternary amine is of the formula [(R¹)(R²)(R³)(R⁴)N]⁺ [X]⁻ wherein R¹ is selected from H, aryl, or C₁ to C₅₀ alkyl op­tionally having one or more non-contiguous C=O or NHC=O or -S- or -0- in the carbon chain, or the same as R²; each of R², R³, and R⁴ is the same or different and selected from H, C₁ to C₁₈ alkyl optionally sub­stituted with one or more OH or from -(R⁵-O) a -H where a is an integer from 1 to 10 and R⁵ is ethylene or propylene; and X is an anion selected from chloride, bromide, iodide, nitrate, fluoborate, phosphate, C₁ to C₈ alkyl phosphate, sulfate, C₁ to C₈ alkyl sulfate, formate, C₁ to C₈ alkyl or C₆ to C₂₄ alkaryl or aryl sulfonate, acetate, citrate, trifluoroacetate, propionate, tartrate or carbonate.