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US 8,410,205 B2Granted
Matting agent composition containing low molecular weight polytrimethylene ether glycol
AssigneeE. I. Du Pont de Nemours and Company
InventorsRajesh Gopalan Saliya, Ayumu Yokoyama, Hari Babu Sunkara
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Abstract
The present invention is directed to a matting agent for reducing gloss of a coating. The matting agent comprises: a) a silica component; b) a polytrimethylene ether glycol; c) one or more solvents; and d) optionally, one or more polymers. This invention is further directed to a matting agent comprising components derived from renewable resources.
Claims20
A matting agent comprising:
- a) a silica component,
- b) a polytrimethylene ether glycol having a Mn (number average molecular weight) in a range of from 134 to 490;
- and
- c) one or more solvents;
- wherein said polytrimethylene ether glycol is fractionated and free from hexamers and heptamers of 1,3-propanediol.
2 more elements
A method for reducing gloss of a dry coating layer on a substrate, said coating layer is formed from a coating composition, said method comprising the steps of:
- i) providing a matting agent comprising:
- a) a silica component;
- b) a polytrimethylene ether glycol having a Mn (number average molecular weight) in a range of from 134 to 490;
- c) one or more solvents wherein said polytrimethylene ether glycol is fractionated and free from hexamers and heptamers of 1,3-propanediol;
- and
- d) one or more polymers selected from acrylic polymers, polyester polymers, or a combination thereof.
- ii) mixing said matting agent with said coating composition to form a matt coating mix;
- iii) applying said matt coating mix over said substrate to form a wet coating layer;
- and
- iv) curing said wet coating layer to form said dry coating layer.
7 more elements
Dependencies are inferred from the claim text.