Metal coatings from nitrile copolymer latexes
AssigneeThe Standard Oil Company
InventorsHerbert Talsma, William M. Giffen, Jr.
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Abstract
Metal surfaces such as steel, tin-plated steel, and aluminum are coated and protected from corrosion by means of a coating comprising a latex of a high nitrile polymer.
Claims25
A metal sheet coated on at least one side thereof with a aqueous latex of a copolymer produced by the polymerization of a major proportion of a monounsaturated nitrile and a minor proportion of another monovinyl monomer component copolymerizable with said nitrile in the presence of a preformed diene rubber.
A metal sheet coated on at last one side thereof with a aqueous latex of copolymer prepared by the polymerization of more than 70 parts by weight of a monounsaturated nitrile and less than 30 parts by weight of another monovinyl monomer component copolymerizable with said nitrile.
A metal sheet coated on at least one side thereof with a aqueous latex of a copolymer produced by the polymerization of a major proportion of a monounsaturated nitrile and a minor proportion of an ester having the structure:
- ##STR24## wherein R.sub.1 is selected from the group consisting of hydrogen, an alkyl group having from 1 to 30 carbon atoms and a halogen optionally in the presence of a preformed diene rubber.
A process comprising coating at least one side of a metal sheet with a layer of a copolymer latex and then drying said layer wherein the copolymer is prepared by the polymerization of:
- (A) a major proportion by weight of a monounsaturated nitrile, and
- (B) a minor proportion by weight of at least one member selected from the group consisting of:
- (1) an ester having the structure:
- ##STR25## wherein R.sub.1 is hydrogen, an alkyl group having from 1 to 30 carbon atoms, or a halogen, and R.sub.2 is an alkyl group having from 1 to 6 carbon atoms,
- (2) an alpha-olefin having the structure:
- ##STR26## wherein R' and R" are alkyl groups having from 1 to 7 carbon atoms, (3) a vinyl ether selected from the group consisting of methyl vinyl ether, ethyl vinyl ether, the propyl vinyl ethers, and the butyl vinyl ethers, and
- (4) vinyl acetate,
- in the presence of from 0 to 40 parts by weight of:
- (C) a rubbery polymer of a conjugated diene monomer selected from the group consisting of butadiene and isoprene and a comonomer selected from the group consisting of styrene, a monomer having the structure:
- ##STR27## wherein R has the foregoing designation, and an ester having the structure:
- ##STR28## wherein R.sub.1 and R.sub.2 have the foregoing respective designations, said rubbery polymer containing from 50% to 100% by weight of polymerized conjugated diene and from 0% to 50% by weight of comonomer.
A process comprising coating at least one side of a metal sheet with a layer of a copolymer latex and then drying said layer wherein the copolymer is prepared by the polymerization of a major proportion by weight of a monounsaturated nitrile and a minor proportion by weight of a vinyl aromatic monomer in the presence of a preformed diene rubber.
Dependencies are inferred from the claim text.