Patent GB-916986-A (GB)
Title: Method for forming a textured finish and resulting product
IPC: D06N3/06
Filed: 1959-06-25
Abstract: A process for producing a textured finish comprises applying to a surface by spraying, roller-coating or dipping an undercoating comprising an alkyd resin or an oil-modified alkyd resin, allowing the coating to dry and while still tacky applying a top coat which is incompatible with the undercoat and comprises 10 to 50% (by weight of total solids) of one or more specified thermoplastic resins in dispersed state, 10 to 50% of one or more said resins in dissolved state and 1 to 20% of a thermosetting melamine-formaldehyde resin in dissolved state, and curing until a leather-like textured finish is obtained.  The specified thermoplastic resins are polyvinyl chloride and vinyl chloride copolymers, including vinyl chloridevinyl acetate-maleic anhydride terpolymers and hydroxylated vinyl chloride-vinyl acetate copolymers; polystyrene; styrene-butadiene copolymers; polyvinylidene chloride and polyethylene.  The term "in the dissolved state" indicates that the resin is in the colloidally dispersed state.  The dispersed and dissolved thermoplastic resins may be the same resin in the two forms but are preferably different resins.  Optional ingredients specified for the undercoat composition are melamine- or ureaformaldehyde resins, phenolic resins, epoxy resins, chlorinated rubber, oleo-resinous varnishes, ethyl- or nitro-cellulose, pigments such as titanium dioxide, toluidine red, clays, silicates and aluminium flake, and conventional paint ingredients such as solvents, wetting agents, driers, anti-settling agents, anti-flood agents and mar-proofing agents, e.g. petroleum solvents, lecithin, cobalt naphthenate, aluminium stearate, silicone oils and wax dispersions.  Other specific compounds used in the specific examples are zinc oxide, carbon black, naphtha, xylol, and iron and manganese naphthenates. The alkyd used in the examples is a short oil soya-alkyd from phthalic anhydride, glycerol and fatty acids from soya and castor oils.  Optional ingredients specified for the top (texture) coat are other resins, solvents, diluents, dispersants, plasticizers and pigments.  Two specific compositions are given in the examples, both contain polyvinyl chloride and polyethylene in dispersed state, vinyl chloridevinyl acetate-maleic anhydride terpolymer and hydroxylated vinyl chloride-vinyl acetate copolymer in dissolved state, melamine-formaldehyde resin, xylol, dioctyl phthalate, cadmium soap, di-isobutyl ketone, petroleum jelly, ethoxyethanol acetate and an epoxy resin stabilizer while that of Example 1 also contains a barium soap, titanium dioxide and a zinc stabilizer and that of Example 2 tricresyl phosphate, toluol, diethylamine and carbon black.  The textured coating may be applied to such surfaces as metal, wood, textile or plastic for such articles as typewriters, dictating machines, data processing machines, vending machines, furniture, wall coverings, moulded fibreglass plastics and motor vehicle exteriors.ALSO:A process for producing a textured finish comprises applying to a surface an undercoating comprising an alkyd resin or an oilmodified alkyd resin, allowing the coating to dry and while still tacky applying a top coat which is incompatible with the undercoat and comprises 10 to 50% (by weight of total solids) of one or more specified thermoplastic resins in dispersed state, 10 to 50% of one or more said resins in dissolved state and 1 to 20% of a thermosetting melamine-formaldehyde resin in dissolved state, and curing until a leather-like textured finish is obtained. The specified thermoplastic resins are polyvinyl chloride and vinyl chloride copolymers, including vinyl chloride-vinyl acetate-maleic anhydride terpolymers and hydroxylated vinyl chloride-vinyl acetate copolymers; polystyrene; styrene-butadiene copolymers; polyvinylidene chloride and polyethylene.  The term "in the dissolved state" indicates that the resin is in the colloidally dispersed state.  The dispersed and dissolved thermoplastic resins may be the same resin in the two forms but are preferably different resins.  Optional ingredients specified for the undercoat composition are melamine- or urea-formaldehyde resins, phenolic resins, epoxy resins, chlorinated rubber, oleo-resinous varnishes, ethyl- or nitro-cellulose, pigments such as titanium dioxide, toluidine red, clays, silicates and aluminium flake, and conventional paint ingredients such as solvents, wetting agents, driers, anti-settling agents, anti-flood agents and mar-proofing agents, e.g. petroleum solvents, lecithin, cobalt naphthenate, aluminium stearate, silicone oils and wax dispersions. Other specified compounds used in the specific examples are zinc oxide, carbon black, naphtha, xylol, and iron and manganese naphthenates.  The alkyd used in the examples is a short oil soya-alkyd from phthalic anhydride, glycerol and fatty acids from soya and castor oils.  Optional ingredients specified for the top (texture) coat are other resins, solvents, diluents, dispersants, plasticizers and pigments.  Two specific compositions are given in the examples, both contain polyvinyl chloride and polyethylene in dispersed state, vinyl chloride-vinyl acetate-maleic anhydride terpolymer and hydroxylated vinyl chloride-vinyl acetate copolymer in dissolved state, melamine-formaldehyde resin, xylol, dioctyl phthalate, cadmium soap, di-isobutyl ketone, petroleum jelly, ethoxy-ethanol acetate and an epoxy resin stabilizer while that of Example 1 also contains a barium soap, titanium dioxide and a zinc stabilizer and that of Example 2 tricresyl phosphate, toluol, diethylamine and carbon black.  The textured coating may be applied to such surfaces as metal, wood, textile or plastic for such articles as typewriters, dictating machines, data processing machines, vending machines, furniture, wall coverings, moulded fibreglass plastics and motor vehicle exteriors.