Method for light-assisted curing of coatings
First Claim
Patent Images
1. A process of preparing an aqueous coating composition for application to substrates which are exposed to ultraviolet light comprising:
- a) mixing a vinyl polymer having acetoacetyl functional groups with an amount of ammonia or primary amine sufficient to convert the acetoacetyl groups to enamine,b) storing the mixture for a period sufficient to allow the reactants to equilibrate,c) adding a sufficient amount of ammonia or primary amine to raise the pH to about 9, andd) maintaining the pH at about 9 until the coating is applied to the substrate.
0 Assignments
0 Petitions
Accused Products
Abstract
This invention relates to a method for light-assisted curing of coatings by providing coatings with an enamine content sufficient to enhance the cure rate of the coatings. The coatings exhibit improved weatherability and gloss retention when exposed to light.
-
Citations
1 Claim
-
1. A process of preparing an aqueous coating composition for application to substrates which are exposed to ultraviolet light comprising:
-
a) mixing a vinyl polymer having acetoacetyl functional groups with an amount of ammonia or primary amine sufficient to convert the acetoacetyl groups to enamine, b) storing the mixture for a period sufficient to allow the reactants to equilibrate, c) adding a sufficient amount of ammonia or primary amine to raise the pH to about 9, and d) maintaining the pH at about 9 until the coating is applied to the substrate.
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeRohm and Haas Company (Dow, Inc.)
-
Original AssigneeRohm and Haas Company (Dow, Inc.)
-
InventorsEdwards, Steven S., Bors, Daniel A., Emmons, William D.
-
Primary Examiner(s)REDDICK, MARIE L
-
Application NumberUS07/920,972Time in Patent Office602 DaysField of Search524/558, 524/548, 525/328.6, 525/378, 525/379, 525/380US Class Current524/558CPC Class CodesC08F 220/14 Methyl esters , e.g. methyl...C08F 220/1804 C4-(meth)acrylate, e.g. but...C08F 8/32 by reaction with aminesC08F 8/44 Preparation of metal salts ...C09D 133/14 of esters containing haloge...C09D 157/12 containing nitrogen atomsY10T 428/31855 Of addition polymer from un...Y10T 428/31942 Of aldehyde or ketone conde...
