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US 9,540,553 B2Granted
Weather resistant polyoxymethylene compositions
AssigneeTicona LLC
InventorsKirsten Markgraf, Bruce M. Mulholland, Dan Murena, Joachim Floeck
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Abstract
The present invention relates to a composition comprising a) at least one polyoxymethylene (A) having terminal OH-groups of more than 15 mmol/kg, b) at least one coupling agent (B), c) one or more hindered amine light stabilizer (C) having a molecular weight ranging from 500 to 1000 g/mol, and d) optionally at least one reinforcing fiber (D).
Claims16
A composition comprising
- a) at least one polyoxymethylene (A) having terminal OH-groups of more than 20 mmol/kg, the at least one polyoxymethylene being present in the composition in an amount ranging from 55 wt. % up to 95 wt. %,
- b) at least one coupling agent (B) comprising a polyisocyanate,
- c) one or more hindered amine light stabilizer(s) (C) having a molecular weight ranging from 500 to 1000 g/mol, and
- d) optionally at least one reinforcing fiber (D).
1 more element
A composition comprising
- a) a polyoxymethylene polymer having terminal OH-groups of more than 15 mmol/kg, the polyoxymethylene polymer being present in the composition in an amount from about 55 wt % to about 95 wt %;
- b) a coupling agent comprising a polyisocyanate;
- c) a hindered amine light stabilizer having a molecular weight ranging from 500 to 1,000 g/mol, the hinder amine light stabilizer comprising Bis(1,2,2,6,6-penta methyl-4-piperidinyl)[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonate;
- and
- d) glass fibers being present in the composition in an amount from about 5% by weight to about 50% by weight, the glass fibers including a sizing, the sizing comprising a silane.
2 more elements
Dependencies are inferred from the claim text.