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US 6,270,692 B1Granted
Dispersion powders with increased autoignition temperature
AssigneeClariant GmbH
InventorsUlrich Geissler, Helmut Rinno
Life of this patent
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Abstract
Dispersion powders with a reduced tendency to autoignition are obtained by adding antioxidants to dispersions before spray drying or to dispersion powders after spray drying.
Claims18
A dispersion powder of increased autoignition temperature which is re-emulsifiable in water, said dispersion powder comprising a base polymer and at least one antioxidant in an amount from 0.1 to 1% by weight based of the weight of the dispersion powder, wherein the base polymer comprises a vinyl ester polymer.
A method for increasing the autoignition temperature of a dispersion powder which is re-emulsifiable in water comprising:
- combining a base polymer and at least one antioxidant in an amount from 0.1 to 1% by weight based of the weight of the dispersion powder, wherein the base polymer comprises a vinyl ester polymer.
Dependencies are inferred from the claim text.