SELBSTHAFTENDE PULVERBESCHICHTUNGEN AUF BASIS PVC-COPOLYMERISATEN

• Main Authors: UNRATH,PETER,.DR, GEBAUER,PETER
• Format: Patent
• Language: German
• Published: 22.08.1974
• Edition: 2
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

1457905 Adhesion promoters for vinyl chloride polymer coatings DYNAMIT NOBEL AG 15 Feb 1974 [17 Feb 1973] 7075/74 Heading C3P A method of forming an adherent coating upon a surface of a substrate comprises applying to a surface a powder comprising (1) a copolymer of vinyl chloride and (2) as adhesion promoter a dialkyl- or diaryl-tin bis-mercapto carboxylic acid ester of a polyhydric alcohol, the ester being present in an amount of 0À5-5% by weight based on the weight of the copolymer, and fusing or sintering the powder to form the desired adherent coating upon the surface. The dialkyl and/or diaryl bis-mercapto carboxylic acid esters preferably have one of the formulµ R z SnX1X11 or Formula (I) in which the radicals R are the same or different and each is an alkyl group (C 1-22 ) or an aryl group (C 6-15 ), the radical X1 and X11 are the same or different and are and the radical X is a group having the formulµ in which n, m, p, q and r are integers. Preferred esters have the general Formulµ (II) and (III) with the radicals R being C 4 H 9 to C 8 H 17 alkyl groups. Examples 3 and 4 describe the coating of steel plates by electrostatic powder coating copolymers of vinyl chloride with propylene, ethylene, butene, vinyl triethoxysilane and vinyl ester of pivalic acid containing analkylgroup (C 9-11 ) and a compound of Formula II in which R is iso-butyl. Example 5 describes the coating of steel, aluminium and glass substrates with a copolymer of vinyl chloride and propylene, vinyl acetate or vinyl ether and a compound Formula II. Examples 6 and 7 repeat the processes of Examples 3 to 5 using a compound of Formula II in which R is octyl and a compound of Formula III in which R is butyl respectively. Examples 8, 9 and 10 repeat the procedures of Example 3, and also Example 4 in the case of Example 10, using compounds of Formulµ Ia to Ie in which R is butyl or butyl (n=1, m=1, p=1; n=2, m=2 and p=0); and R is phenyl and n = 2, m = 1, and p= 1 respectively. Example 11 repeats the procedure of Example 3 in which the steel plates are replaced by iron and aluminium alloys.