Patent GB-670897-A (GB)
Title: Improvements in and relating to the treatment of resinous surfaces
IPC: B05D3/04
Filed: 1950-01-16
Abstract: A process for providing a surface with a resinous coating having a wrinkle finish comprises (1) coating the surface with a composition containing residual hydroxyl groups and consisting entirely or predominantly of an oil-modified alkyd resin or oil-modified phenolaldehyde resin; (2) heating the coated surface to at least 100 DEG  C.; and (3) subjecting the heated, coated surface to the action of the vapours of an organohalogenosilane, alone or mixed with the vapour of SiCl4.  Typical organohalogenosilanes specified are methyl-, ethyl-, propyl-, butyl-, phenyl-, benzylanp tolyl-halogenosilanes, CH3.SiHCl2 and similar alkyl, aryl, &c. halogenosilanes, e.g. chloro-, bromo- and fluoro-silanes; these may be used separately or in admixture and with or without SiCl4, e.g. an azeotrope of (CH3)3SiCl and SiCl4.  The alkyd resin may be made from one or more of the polyhydric alcohols: mono-, di-, tri- and tetra-ethylene glycols, dipropylene glycol, glycerol, sorbitol and pentaerythritol, with polybasic acids or anhydrides such as oxalic, malonic, succinic, adipic, phthalic, isophthalic and halogenated phthalic acids, e.g. tetrachloro- and 4-chloro-phthalic acids, and modifying oils, e.g. linseed-, chinawood-, castor-, soya bean- and oiticica oils, linseed oil acids and coconut oil acids; the modifying ingredients may vary from 5 to 70 per cent by weight of the total reactants. The phenol aldehyde resins may be made from phenol, cresols, xylenols or mixtures thereof, and preferably alkyl-modified phenols such as p-tertiary butyl- and amylphenols, aldehydes such as formaldehyde, acetaldehyde, butyraldehyde and furfural, and the customary modifying oils.  The resins may contain pigments, e.g. carbon black, ferric oxide, titania, lithopone, zinc and lead chromates, and dyes, fillers, extenders, &c.  In the example a steel surface was sprayed with a 60 per cent solids xylol solution of a glycerol-phthalate alkyd resin modified with linseed oil acids and pigmented with lead chromate, heated to 150 DEG  C. and immediately contacted with the vapours of a mixture of 33 per cent CH3SiHCl2 and 67 per cent of an azeotrope of (CH3)3SiCl and SiCl4.  Thereafter the curing of the surface was completed by baking at 150 DEG  C., though curing may be effected at room temperature.  Specifications 572,740 and 575,696, [both in Group VIII], are referred to.ALSO:A process for providing a surface with a resinous coating having a wrinkle finish comprises (1) coating the surface with a composition containing residual hydroxyl groups and consisting entirely or predominantly of an oil-modified alkyd or phenolaldehyde resin, (2) heating the coated surface to at least 100 DEG C and (3) subjecting the heated, coated surface to the action of the vapours of one or more organohalogenosilanes, alone or mixed with the vapour of SiCl4.  The resins may contain pigments, e.g. carbon black, ferric oxide, titania, lithopone, zinc and lead chromates, and dyes, fillers, extenders &c.  In the example a steel surface was sprayed with a 60 per cent solids xylol solution of a glycerolphthalate resin modified with linseed oil acids and pigmented with lead chromate, heated to 150 DEG C and immediately contacted with the vapours of a mixture of 33 per cent CH3.SiHCl2 and 67 per cent of an azeotrope of (CH3)3SiCl and SiCl4.  Thereafter the curing of the surface was completed by baking at 150 DEG C, though curing may be effected at room temperature.  Specifications 572,740 and 575,696, [both in Group VIII], are referred to.