Chlorosulfonated ethylene vinyl acetate polymer coating composition

Claim 2

A coating composition comprising 10-80% by weight of binder and 20-90% by weight of an organic solvent; wherein the binder consists essentially of about (1) 40-85% by weight, based on the weight of the binder, of a chlorosulfonated ethylene vinyl acetate polymer having about 10-30% by weight of polymerized vinyl acetate, a melt index of about 350-10,000, containing about 40-48% by weight chlorine and up to 3% by weight sulfur present as combined sulfonyl chloride groups; (2) 9-44% by weight, based on the weight of the binder, of an epoxy resin selected from the group consisting of an epoxy resin having the formula ##STR8## where R 2 is an aromatic radical and b is a positive integer of about 0.5 to 4, and an epoxy novolac resin of the formula ##STR9## where d is a positive integer of about 0.2-2, (3) 3-20% by weight, based on the weight of the binder, of a polyamine curing agent of the formula ##STR10## where R is R 1 NH 2 and R 1 is an aliphatic or cycloaliphatic radical; and (4) 0.1-3% by weight, based on the weight of the binder, of a bicyclic amidine.

Claim 3

The coating composition of claim 1 containing pigment in a pigment-to-binder weight ratio of about 20:100 to 200:100.

Claim 4

The coating composition of claim 2 in which the chlorosulfonated ethylene vinyl acetate polymer contains about 16-26% by weight polymerized vinyl acetate, has a melt index of about 400-1000, contains about 42-46% by weight chlorine and about 0.5-2% by weight sulfur as sulfonyl chloride.

Claim 5

The coating composition of claim 3 in which R 2 is ##STR11##

Claim 6

The coating composition of claim 3 in which R is ##STR12##

Claim 7

The coating composition of claim 3 in which the bicyclic amidine is 1,8-diaza-bicyclo(5,4,0)-undecene-7.

Claim 8

The coating composition of claim 3 containing about 0.1-3% by weight, based on the weight of the binder, of a fluorochemical surfactant.

Claim 9

The coating composition of claim 2 in which the binder consists essentially of about (1) 40-85% by weight, based on the weight of the binder, of a chlorosulfonated ethylene vinyl acetate polymer having about 16-26% by weight of polymerized vinyl acetate, a melt index of about 400-1000, containing about 42-46% by weight chlorine and about 0.5-2% by weight sulfur as sulfonyl chloride. (2) 9-44% by weight, based on the weight of the binder, of an epoxy resin of the formula ##STR13## where b is a positive integer of about 0.5 to 4; (3) 3-20% by weight, based on the weight of the binder, of a polyamine curing agent of the formula ##STR14## where R is ##STR15## (4) 0.01-3% by weight of 1,8-diaza-bicyclo(5,4,0)undecene-7.

Claim 10

A two-component composition wherein the two components are mixed together to form the composition of claim 1 wherein the components comprise component (1) a solution of a chlorosulfonated ethylene vinyl acetate polymer having about 10-30% by weight of polymerized vinyl acetate, a melt index of about 350-10,000, containing about 40-48% by weight chlorine and up to 3% by weight sulfur present as combined sulfonyl chloride groups and an epoxy resin, component (2) a polyamine curing agent of the formula ##STR16## where R is R 1 NH and R 1 is an aliphatic or cycloaliphatic radical and a bicyclic amidine.

Claim 11

A coating composition comprising 10-80% by weight of binder and 20-90% by weight of an organic solvent; wherein the binder consists essentially of about (1) 35-90% by weight, based on the weight of the binder, of a chlorosulfonated ethylene vinyl acetate polymer having about 10-30% by weight of polymerized vinyl acetate, a melt index of about 350-10,000, containing about 40-48% by weight chlorine and up to 3% by weight sulfur present as combined sulfonyl chloride groups; (2) 7-60% by weight, based on the weight of the binder, of an epoxy resin selected from the group consisting of an epoxy resin having the formula ##STR17## where R 2 is an aromatic radical and b is a positive integer of about 0.5 to 4 and an epoxy novolac resin having the formula ##STR18## where d is a positive integer of about 0.2-2, (3) 3-20% by weight, based on the weight of the binder, of a polyamine curing agent selected from the group consisting of ##STR19## where R is R 1 NH 2 and R 1 is an aliphatic or cycloaliphatic radical, R 4 is C or a hydrocarbon group, R 3 is H or CH 3 , when x is 3, R 4 is a hydrocarbon group and when x is 4, R 4 is C.

Claim 12

A coating composition comprising 10-80% by weight of binder and 20-90% by weight of an organic solvent; wherein the binder consists essentially of about (1) 35-90% by weight, based on the weight of the binder, of a chlorosulfonated ethylene vinyl acetate polymer having about 10-30% by weight of polymerized vinyl acetate, a melt index of about 350-10,000, containing about 40-48% by weight chlorine and up to 3% by weight sulfur present as combined sulfonyl chloride groups; (2) 7-60% by weight, based on the weight of the binder, of an epoxy resin selected from the group consisting of an epoxy resin having the formula ##STR17## where R 2 is an aromatic radical and b is a positive integer of about 0.5 to 4 and an epoxy novolac resin having the formula ##STR18## where d is a positive integer of about 0.2-2, (3) 3-20% by weight, based on the weight of the binder, of a polyamine curing agent selected from the group consisting of ##STR19## where R is R 1 NH 2 and R 1 is an aliphatic or cycloaliphatic radical, R 4 is C or a hydrocarbon group, R 3 is H or CH 3 , when x is 3, R 4 is a hydrocarbon group and when x is 4, R 4 is C.

Claim 13

The coating composition of claim 10 containing pigment in a pigment-to-binder weight ratio of about 20:100 to 200:100.

Claim 14

A coating composition comprising 10-80% by weight of binder and 20-90% by weight of an organic solvent; wherein the binder consists essentially of about (1) 35-90% by weight, based on the weight of the binder, of a chlorosulfonated ethylene vinyl acetate polymer having about 10-30% by weight of polymerized vinyl acetate, a melt index of about 350-10,000, containing about 40-48% by weight chlorine and up to 3% by weight sulfur present as combined sulfonyl chloride groups; (2) 7-60% by weight, based on the weight of the binder, of an epoxy resin selected from the group consisting of an epoxy resin having the formula ##STR20## where R 2 is an aromatic radical and b is a positive integer of about 0.5 to 4 and an epoxy novolac resin of the formula ##STR21## where d is a positive integer of about 0.2-2, (3) 3-20% by weight, based on the weight of the binder, of a polyamine curing agent selected from the group consisting of ##STR22## where R is R 1 NH 2 and R 1 is an aliphatic or cycloaliphatic radical; R 4 is C or a hydrocarbon group, R 3 is H or CH 3 , when x is 3, R 4 is a hydrocarbon group and when x is 4, R 4 is C and wherein the coating composition contains electrically conductive pigments in a pigment to binder weight ratio of about 50/100 to 300/100 and a dry film of the coating composition 25 microns thick has an electrical resistance of about 1-50 ohms.

Claim 15

A coating composition comprising 10-80% by weight of binder and 20-90% by weight of an organic solvent; wherein the binder consists essentially of about (1) 35-90% by weight, based on the weight of the binder, of a chlorosulfonated ethylene vinyl acetate polymer having about 10-30% by weight of polymerized vinyl acetate, a melt index of about 350-10,000, containing about 40-48% by weight chlorine and up to 3% by weight sulfur present as combined sulfonyl chloride groups; (2) 7-60% by weight, based on the weight of the binder, of an epoxy resin selected from the group consisting of an epoxy resin having the formula ##STR20## where R 2 is an aromatic radical and b is a positive integer of about 0.5 to 4 and an epoxy novolac resin of the formula ##STR21## where d is a positive integer of about 0.2-2, (3) 3-20% by weight, based on the weight of the binder, of a polyamine curing agent selected from the group consisting of ##STR22## where R is R 1 NH 2 and R 1 is an aliphatic or cycloaliphatic radical; R 4 is C or a hydrocarbon group, R 3 is H or CH 3 , when x is 3, R 4 is a hydrocarbon group and when x is 4, R 4 is C and wherein the coating composition contains electrically conductive pigments in a pigment to binder weight ratio of about 50/100 to 300/100 and a dry film of the coating composition 25 microns thick has an electrical resistance of about 1-50 ohms.

Claim 16

The coating composition of claim 12 in which the conductive pigments are a mixture of carbon black pigment and finely divided graphite.

Claim 17

The coating composition of claim 13 in which the chlorosulfonated ethylene vinyl acetate polymer coatins about 16-26% by weight polymerized vinyl acetate, has a melt index of about 400-1000, contains about 42-46% by weight chlorine and about 0.5-2% by weight sulfur as sulfonyl chloride.

Claim 18

The coating composition of claim 12 which R 2 is ##STR23##

Claim 19

The coating composition of claim 15 in which R is ##STR24##

Claim 20

The coating composition of claim 12 containing in addition about 0.1-3% by weight, based on the weight of the binder of a bicyclic amidine.

Claim 21

The coating composition of claim 17 in which the bicyclic amidine is 1,8-diaza-bicyclo(5,4,0)-undecene-7.

Claim 22

The coating composition of claim 12 containing in addition about 0.1-3% by weight, based on the weight of the binder, of a strong organic base.

Claim 23

The coating composition of claim 19 in which the strong organic base is a tertiary alkyl ammonium hydroxide or a tertiary alkyl ammonium methoxide.

Claim 24

The coating composition of claim 17 in which the binder consists essentially of about (1) 40-85% by weight, based on the weight of the binder, of a chlorosulfonated ethylene vinyl acetate polymer having about 16-26% by weight of polymerized vinyl acetate, a melt index of about 400-1000, containing about 42-46% by weight chlorine and about 0.5-2% by weight sulfur as sulfonyl chloride. (2) 9-44% by weight, based on the weight of the binder, of an epoxy resin of the formula ##STR25## where b is a positive integer of about 0.5 to 4; (3) 3-20% by weight, based on the weight of the binder, of a polyamine curing agent of the formula ##STR26## where R is ##STR27## (4) 0.01-3% by weight of 1,8-diaza-bicyclo(5,4,0)undecene-7 and wherein the electrically conductive pigments comprise a mixture of carbon black pigment and finely divided graphite and a dry film of the coating has an electrical resistance of 5-20 ohms.

Claim 25

A substrate coated with a cured layer of the composition of claim 1.

Claim 26

A metal substrate coated with a cured primer layer of the composition of claim 2 and having in superimposed adherence to the primer layer a cured layer of a fluorocarbon polymer comprising vinylidene fluoride and hexafluoropropylene.