Water based coating composition containing an aminoplast-ether copolymer
AssigneeUnited Catalysts Inc.
InventorsCharles W. Glancy, Alan L. Steinmetz
Life of this patent
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Abstract
A coating composition containing a linear aminoplast-ether copolymer of the formula: ##STR1## where the divalent R.sub.01 contains a divalent alkyleneoxy containing moiety, Amp is the skeletal residue of an aminoplast, R is hydrogen, alkyl containing 1 to about 4 carbon atoms, and acyl containing 1 to about 4 carbon atoms, p is a positive number that is equal to the free valence of Amp minus 2, RO is bonded to alkylene units of Amp, and a is a number greater than 1.
Claims118
A water-containing coating composition comprising a major amount of a coating vehicle and a minor amount of a linear aminoplast-ether copolymer of the formula:
- ##STR26## where the divalent R.sub.01 contains a divalent alkyleneoxy containing moiety, Amp is the skeletal residue of an aminoplast, R is hydrogen, alkyl containing 1 to about 4 carbon atoms, or acyl containing 1 to about 4 carbon atoms, p is a positive number that is equal to the free valence of Amp minus 2, RO is bonded to alkylene units of Amp, and a is a number greater than 1.
A water-containing coating composition comprising a coating vehicle and a linear aminoplast-ether copolymer of the formula:
- ##STR27## where the divalent R.sub.01 contains a divalent alkyleneoxy containing moiety, Amp is the skeletal residue of an aminoplast, R is hydrogen, alkyl containing 1 to about 4 carbon atoms, or acyl containing 1 to about 4 carbon atoms, p is a positive number that is equal to the free valence of Amp minus 2, RO is bonded to alkylene units of Amp, a is a number greater than 1 and wherein the linear aminoplast-ether copolymer contains one or more hydrophobic pendant groups whereby the copolymer contains a unit of the formula:
- ##STR28## wherein R.sub.02 is a hydrophobic group, different from RO--, that is covalently bonded to Amp through a heteroatom and contains at least two carbon atoms,
- p.sub.2 is number that is equal to the free valence of Amp minus (2+q), and
- q is a positive number.
A coating composition comprising a major amount of a coating vehicle and a minor amount of the linear copolymerization reaction product of a polyfunctional aminoplast with a polyalkylene oxide of the formula:
- H-- Alkylene Oxide --H
- where "alkylene oxide" is a divalent moiety containing at least two alkylene oxide units whether joined or separated, and the terminal H groups are active hydrogen, in the presence of an acid catalyst provided in a catalytically effective amount.
The coating composition comprising the coating vehicle and the linear aminoplast-ether copolymer of claim 84 wherein the hydrophobe pendant groups extend from the aminoplast component of the linear backbone of the aminoplast-ether copolymer.
A coating composition containing a vehicle and a linear aminoplast-ether copolymer made by the polymerization reaction of a polyfunctional aminoplast with an ether containing two active hydrogen terminal groups, in the presence of an acid catalyst provided in catalytically effective amounts until a desired molecular weight is achieved.
Dependencies are inferred from the claim text.