Patent GB-991908-A (GB)
Title: Resinous coating compositions
Inventor: MUSKAT IRVING E
IPC: C08K5/053
Filed: 1961-05-02
Abstract: Water-dispersible mixtures comprise (A) maleic anhydride copolymers wherein one carboxyl group in from 10 to 80% of the maleic residues is esterified with a monohydroxy organic compound, which copolymers may also be partially neutralized with ammonium hydroxide or C1-3 alkyl-substituted ammonium hydroxide and (B) a polyhydric alcohol, wherein the alcohol groups are on aliphatic carbon atoms, in an amount providing a ratio of hydroxy equivalence to unesterified maleic residues from 3:2 to 2:3.  Such equivalence is calculated only from readily reactable groups on an explained basis.  The mixtures are curable and may be used as moulding compositions but are primarily intended as coating compositions, when they are used in aqueous solution. Such solutions preferably contain also formaldehyde or a compound yielding formaldehyde, a water-soluble methylolated compound such as phenol, urea, melamine or benzoguanamine, or an amine.  The maleic copolymers may be of low molecular weight containing up to 12% of bound chain-terminating solvent; the comonomer may be a C2-5 mono-olefin, styrene, vinyl naphthalene, vinyl toluene, vinyl dito pentahalobenzene, an alkyl styrene, vinyl acetate, a vinyl ether, methyl methacrylate or vinyl chloride. Mixtures wherein the copolymer is not neutralized may be dissolved in organic solvents, e.g. ketones. Applications.-Solutions of the mixtures may be used to coat metal, e.g. tins and wires, or porous substrates, e.g. wood or paper, and may be applied by brushing, spraying or roller coating, the solvent being evaporated to form a film which is then heat cured.  In examples tin plate is coated. The solutions may also be used to treat textiles to improve crease and water-resistance.  The mixtures may also be used as binders for fibrous materials, e.g. webs or mats, and as adhesives for plywood. Specification 815,830 is referred to.ALSO:Water-dispersible mixtures comprise (A) maleic anhydride copolymers wherein one carboxyl group in from 10-80% of the maleic residues is esterified with a monohydroxy organic compound, which copolymers may also be partially neutralized with ammonium hydroxide or C1-3 alkyl-substituted ammonium hydroxide, and (B) a polyhydric alcohol, wherein the alcohol groups are on aliphatic carbon atoms, in an amount providing a ratio of hydroxy equivalence to unesterified maleic residues from 3 : 2 to 2 : 3. Such equivalence is calculated only from readily reactable groups on an explained basis.  The mixtures are curable and may be used as moulding compositions but are primarily intended as coating compositions, when they are used in aqueous solution.  Such solutions preferably contain also formaldehyde or a compound yielding formaldehyde, a water-soluble methylolated compound such as phenol, urea, melamine or benzoguanamine, or an amine.  The maleic copolymers may be of low molecular weight containing up to 12% of bound chain-terminating solvent; the comonomer may be a C2-5 mono-olefin, styrene, vinyl naphthalene, vinyl toluene, vinyl dito penta-halobenzene, an alkyl styrene, vinyl acetate, a vinyl ether, methyl methacrylate or vinyl chloride.  Mixtures wherein the copolymer is not neutralized may be dissolved in organic solvents, e.g. ketones.  Applications  Solutions of the mixtures may be used to coat metal, e.g. tins and wires, or porous substrates, e.g. wood or paper, and may be applied by brushing, spraying or roller coating, the solvent being evaporated to form a film which is then heat cured. In examples tin plate is coated.  The solutions may also be used to treat textiles to improve crease- and water-resistance.  The mixtures may also be used as binders for fibrous materials, e.g. webs or mats, and as adhesives for plywood.  Specification 815,830 is referred to.