Polyoxymethylene polymer composition for fluidized bed coating processes and products made therefrom
AssigneeTicona LLC
InventorNicolai Papke
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Abstract
Polymer particles containing a polyoxymethylene polymer for coating metallic substrates are described. The polymeric particles contain a polyoxymethylene polymer in combination with an adhesion promoter which may comprise an acid modified polyolefin and performance enhancing additives. The polyoxymethylene polymer and the adhesion promoter may also be combined with a thermoplastic elastomer and optionally a coupling agent. Also disclosed is a process where the polymeric particles are used to from a fluidized bed for coating metallic substrates. In one embodiment, after being coated with the polymer particles, the coated metal substrate is gas cooled followed by cooling the coated substrate in a bath containing an aqueous medium.
Claims26
A polymer composition comprising:
- a polyoxymethylene polymer or copolymer thereof
- a thermoplastic elastomer;
- and
- an acid modified polyolefin, the acid modified polyolefin comprising a copolymer of a polyolefin and an unsaturated carboxylic acid, the acid modified polyolefin being present in the composition in an amount from about 0.2% to about 18% by weight.
A process for coating a metallic substrate comprising:
- gas cooling a coated metallic substrate, the metallic substrate being coated by a composition comprising polymeric particles, the polymeric particles containing a polyoxymethylene polymer;
- and
- further cooling the coated metallic substrate by contact with an aqueous medium.
Dependencies are inferred from the claim text.