Patent GB-973528-A (GB)
Title: Resinous compositions
IPC: B05D7/26
Filed: 1962-12-19
Abstract: Compositions comprise a thermosetting interpolymer of an unsaturated carboxylic acid amide and at least one other monomer containing a CH2=C< group, said interpolymer having at least one hydrogen atom of the amido nitrogen replaced by the structure <FORM:0973528/C3/1> where R is hydrogen or C1- 4 alkyl, and R1 is hydrogen, C1- 12 alkyl or alkoxyethyl, and a thermoplastic polymer of at least one compound of formula <FORM:0973528/C3/2> where R2 is hydrogen or C1- 4 alkyl and R3 is C1- 20 alkyl.  Preferably at least 50% of the alkylol groups are etherified.  The amide may be acrylamide, methacrylamide, ethylacrylamide, crotonamide or the diamides of fumaric and maleic acids, maleuric acid or its esters, or N-carbamyl maleimide. Specified terminal methylene compounds are olefins, vinyl aromatic compounds, vinyl esters, nitriles of unsaturated acids, and unsaturated acids.  Specified aldehydes are formaldehyde, acetaldehyde, butyraldehyde and furfural.  The thermoplastic polymer may be derived from methyl, ethyl, propyl, butyl, amyl, hexyl, octyl, lauryl, tetradecyl, hexadecyl and octadecyl acrylates and methacrylates and mixtures thereof, optionally together with styrene, vinyl toluene, acrylonitrile, vinyl acetate, dibutyl itaconate and butadiene.  The compositions may also comprise melamine-formaldehyde resins, alkyd resins, solvents, e.g. acetone, methyl-ethylketone, benzene, toluene, xylene, esters, alcohols and chlorinated hydrocarbons, pigments, and acid or latent acid catalysts.  Examples describe the copolymerization of acrylamide with styrene and one or more of ethyl acrylate, methyl methacrylate and methacrylic acid in the presence of cumene hydroperoxide and tert. dodecyl mercaptan in an alcohol or alcohol/hydrocarbon solvent mixture and the reaction of the product with formaldehyde in the presence of maleic anhydride; the copolymerization of methyl methacrylate with lauryl methacrylate in aqueous suspension in the presence of benzoyl peroxide, tert. dodecyl mercaptan, buffers and protective colloids, or with lauryl methacrylate or dibutyl itaconate and optionally methacrylic acid in the presence of benzoyl peroxide and organic solvents; and coating compositions comprising formaldehyde modified copolymers of acrylamide, styrene, ethyl acrylate and methacrylic acid and (1 to 4) titanium dioxide, methyl methacrylate/lauryl methacrylate copolymer together with (5) dioctylphthalate; (6) aluminium, methyl methacrylate/ dibutyl itaconate copolymer, methyl methacrylate/dibutyl itaconate/methacrylic acid copolymer and melamine-formal dehyde resin; and (7 and 8) aluminium methyl methacrylate/ lauryl methacrylate copolymer, methyl methacrylate/ lauryl methacrylate/methacrylic acid copolymer together with (9) dioctyl phthalate and (10) melamine-formaldehyde resin. Specifications 826,652 826,653 842,641 and 920,810 are referred toALSO:Substrates may be coated with compositions comprising a thermosetting interpolymer of an unsaturated carboxylic acid amide and at least one other monomer containing a CH2 = C< group, said interpolymer having at least one hydrogen atom of the amido nitrogen replaced by the structure <FORM:0973528/B1-B2/1> where R is hydrogen or C1-4 alkyl, and R1 is hydrogen, C1-12 alkyl or alkoxyethyl, and a thermoplastic interpolymer of at least one compound of formula <FORM:0973528/B1-B2/2> where R2 is hydrogen or C1-4 alkyl and R3 is C1-20 alkyl.  Preferred amides are acrylamide and methacrylamide, preferred comonomers are olefins, vinyl aromatic compounds, vinyl esters, unsaturated acids and their nitriles. The preferred aldehyde is formaldehyde.  The thermoplastic polymer is preferably derived from alkyl acrylates and methacrylates, optionally with styrene, vinyl toluene, acrylonitrile, vinyl acetate, dibutyl itaconate or butadiene. The compositions may also comprise melamine-formaldehyde or alkyd resins, solvents, pigments and acid or latent acid catalysts. The compositions may be applied to substrates such as metals, which may be primed with alkyd, oil or rosin modified alkyd, aminoplast and/or epoxy resin primers.  Examples describe the coating by spraying of phosphatized steel panels primed with compositions comprising a styrene and methyl methacrylate modified alkyd resin, epoxy ester, urea-formaldehyde resin and epoxy resin with topcoats comprising organic solvents and formaldehyde modified copolymers of acrylamide, styrene, ethylacrylate and methacrylic acid together with (1 to 4) titanium dioxide, methyl methacrylate/lauryl methacrylate copolmer, together with (5) dioctyl phthalate; (6) aluminium, methyl methacrylate/dibutyl itaconate copolymer, methyl methacrylate/dibutyl itaconate/methacrylic acid copolymer and melamine-formaldehyde resin; (7 and 8) aluminium, methyl methacrylate/lauryl methacrylate copolymer, methyl methacrylate/lauryl methacrylate/methacrylic acid copolymer, together with (9) dioctyl phthalate and (10) melamine-formaldehyde resin.  The coatings are subsequently baked. Specifications 826,652, 826,653, 842,641 and 920,810 are referred to.