Patent GB-830975-A (GB)
Title: Resin coated glass-reinforced plastics
IPC: C07F7/18
Filed: 1956-05-18
Abstract: A glass-reinforced polyester resin mat is coated by applying a curable resinous coating of a material partially compatible with said glassreinforced polyester resin mat to an inert film, effecting contact between said resinous coating and a surface of the said glass-reinforced polyester resin mat, bonding the contacted surfaces by curing, and stripping the inert film from the cured resin-coated glass-reinforced polyester resin mat, said resinous coating being cured, before application to the mat, to a point where it is still compatible with the polyester resin but will not mix extensively therewith.  The coating resin may be partially polymerized diallyl phthalate alone or mixed with a polyester resin.  The base material may be a mat of continuous or chopped glass fibres impregnated with a polyester resin of the type made from glycol and dibasic acids including maleic acid, activated with a catalyst such as benzoyl peroxide or tert-butyl perbenzoate.  The inert film may be of regenerated cellulose.  In an example, a mixture of diallyl phthalate pre-polymer, diallyl phthalate monomer, tert-butyl perbenzoate, methyl ethyl ketone and toluene was applied to a regenerated cellulose film and dried; the coated film was applied to a laminate of six layers of glass cloth impregnated with a polyester resin formed from ethylene and propylene glycols and phthalic and maleic acids, and cured for 35 minutes at 132 DEG  C. and from 28 to 360 lb/sq. in. pressure.  The process may be applied to polyester resin glass-reinforced pipes, linings of tanks, and chair bodies.  The coating resin may contain dyes or pigments, and may be printed with a pattern by means of a resin-based printing ink.ALSO:A glass-reinforced polyester resin mat is coated by applying a curable resinous coating of a material partially compatible with said glass-reinforced polyester resin mat to an inert film, effecting contact between said resinous coating and a surface of the said glass-reinforced polyester resin mat, bonding the contacted surfaces by curing, and stripping the inert film from the cured resin-coated glassreinforced polyester resin mat, said resinous coating being cured, before application to the mat, to a point where it is still compatible with the polyester resin but will not mix extensively therewith.  The coating resin may be partially polymerized diallyl phthalate alone or mixed with a polyester resin.  The base material may be a mat of continuous or chopped glass fibres impregnated with a polyester resin of the type made from glycol and dibasic acids including maleic acid, activated with a catalyst such as benzoyl peroxide or tert-butyl perbenzoate.  The inert film may be of regenerated cellulose.  In an example, a mixture of diallyl phthalate pre-polymer, diallyl phthalate monomer, tert-butyl perbenzoate, methyl ethyl ketone and toluene was applied to a regenerated cellulose film and dried; the coated film was applied to a laminate of six layers of glass cloth impregnated with a polyester resin formed from ethylene and propylene glycols and phthalic and maleic acids, and cured for 35 minutes at 132 DEG  C. and from 28 to 360 lbs./sq. in. pressure.  The process may be applied to polyester resin glass-reinforced pipes, linings of tanks, and chair bodies.  The coating resin may contain dyes or pigments, and may be printed with a pattern by means of a resin-based printing ink.