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US 6,617,033 B1Granted
Method for in-mold coating a polyolefin article
AssigneeOMNOVA Solutions Inc.
InventorsElliott J. Straus, Douglas S. McBain
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AssigneeOMNOVA Solutions Inc.
InventorsElliott J. Straus, Douglas S. McBain
Estimating the term…
The present invention is a process for producing an injection-molded thermoplastic work piece having a thermoset coating bonded thereto, comprising the steps of introducing into a closed mold a thermoplastic material, such as a polyolefin, heated to a temperature above its melting point and molding said material to form a work piece; followed by introducing a thermoset coating composition capable of generating free radicals into the closed mold to contact at least a portion of a surface of the work piece, the temperature of which is at or above the temperature at which free radicals contained in the coating composition are generated. The mold is then opened and the work piece is removed after the coating composition has at least partially cured. The present invention is also directed to a molded article made by the described process.
A work piece consisting essentially of polyolefin having a thermoset coating adhered thereto made by a process comprising the steps of:
A work piece consisting essentially of polyolefin having a thermoset coating adhered thereto made by a process comprising the steps of:
A work piece consisting essentially of polyolefin having a thermoset coating adhered thereto made by a process comprising the steps of:
A molded polypropylene work piece including a thermoset coating bonded thereto, said coating comprising a coating composition including a free radical generating component.
A molded polypropylene work piece comprising a thermoset coating bonded thereto, said coating made from a saturated aliphatic polyester urethane intermediate, a saturated (cyclo) aliphatic (meth) acrylate, one or more hydroxy alkyl (meth) acrylates, a polyacrylate ester of an alkylene polyol, one or more vinyl substituted aromatics, and an initiator capable of generating free radicals in said coating composition.
A molded polypropylene work piece having a thermoset in-mold coating adhered thereto, made by a process comprising the steps of:
A molded polyolefin work piece made by a process comprising the steps of:
A thermoplastic work piece having a thermoset coating adhered thereto made by a process comprising the steps of:
Dependencies are inferred from the claim text.