Self-crosslinking powder containing carboxy and epoxy groups admixed with a flow control agent
Abstract
Abstract POWDER COATING COMPOSITIONS ARE DISCLOSED IN GENERAL. INDIVIDUAL POWDER COATING COMPOSITIONS OF THIS INVENTION ARE A MIXTURE A SEVERAL MATERIALS. THE MOST SIGNIFICANT MATERIALS EMPLOYED IN THE POWDER COATINGS INCLUDE THE FOLLOWING. A COPOLYMER CONTAINING CROSSLINKABLE, FUNCTIONAL GROUPS. FORMS THE MOST IMPORTANT CONSTITUENT OF THE POWDER COATING. THE COPOLYMER HAS A GLASS TRANSITION TEMPERA TURE IN THE RANGE OF 40*C TO 90*C AND A MOLECULAR WEIGHT (MN) IN THE RANGE FROM ABOUT 2,000 TO ABOUT 15,000. ANOTHER MATERIAL OF AN INDIVIDUAL COMPOSITION IS A FLOW CONTROL AGENT WHICH FORMS AT LEAST 0.05% BY WEIGHT OF THE MIXTURE. THE FLOW CONTROL AGENT IS A POLYMER HAVING A MOLECULAR WEIGHT (MN) OF AT LEAST 1000. ALSO, THE FLOW CONTROL AGENT HAS A GLASS TRANSITION TEMPERATURE AT LEAST 50*C. LOWER THAN THE GLASS TRANSITION TEMPERATURE OF THE COPOLYMER. OTHER MATERIALS WHICH MAY BE EMPLOYED IN INDIVIDUAL POWDER COATING COMPOSITIONS ARE CATALYSTS, PIGMENTS, ANTISTAIC AGENTS AND PLASTICIZERS.
Inventors
- 👤 D Heights
- 👤 Y Chang
Bibliographic Details
Claims Analysis
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