Methods for treating substrates
AssigneeCapsulated Systems, Inc.
InventorsRoland M. LYNCH, Morris N. NEWSOM, JR.
Life of this patent
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Abstract
The disclosure relates to compositions and methods useful for treating a substrate, for example for preventing or inhibiting corrosion of metal substrates. The compositions comprise (a) at least one cross-linkable, partially hydrolyzed polymer, and (b) at least one particular crosslinking agent.
Claims21
1-31. (canceled)
A method for preventing yellowing of a substrate, the method comprising applying to the substrate a composition prepared by crosslinking:
- (a) at least one cross-linkable, partially hydrolyzed polymer of formula (I):
- —(CH2CHOH)x—(CH2CH2)y—(CH2CHOCOCH3)z— (I)
- wherein x, y, and z independently represent mol fractions of ethylene, vinyl alcohol, and vinyl acetate, respectively;
- and
- (b) at least one crosslinking agent at least one crosslinking agent chosen from 4,4′-methylenedi(cyclohexyl isocyanate) and homopolymers of hexamethylene diisocyanate,
- wherein the cross-linkable, partially hydrolyzed polymer has a molecular weight ranging from about 180,000 to about 220,000 and a degree of hydrolysis ranging from about 30% to about 60%, and
- wherein the crosslinking reaction occurs at a temperature ranging from about 20° C. to about 30° C.
A method for treating a substrate by molecularly bonding a partially hydrolyzed polymer to the substrate, the method comprising applying to the substrate a composition prepared by crosslinking:
- (a) at least one cross-linkable, partially hydrolyzed polymer of formula (I):
- —(CH2CHOH)x—(CH2CH2)y—(CH2CHOCOCH3)z— (I)
- wherein x, y, and z independently represent mol fractions of ethylene, vinyl alcohol, and vinyl acetate, respectively;
- and
- (b) at least one crosslinking agent at least one crosslinking agent chosen from 4,4′-methylenedi(cyclohexyl isocyanate) and homopolymers of hexamethylene diisocyanate,
- wherein the cross-linkable, partially hydrolyzed polymer has a molecular weight ranging from about 180,000 to about 220,000 and a degree of hydrolysis ranging from about 30% to about 60%, and
- wherein the crosslinking reaction occurs at a temperature ranging from about 20° C. to about 30° C.
Dependencies are inferred from the claim text.