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US 8,815,771 B2Granted
Mechanochromic coating composition
AssigneePPG Industries Ohio, Inc.
InventorsAnu Chopra, Jun Deng, Charles R. Hickenboth, Robin M. Peffer
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Abstract
A mechanochromic coating composition is disclosed comprising a polymeric network incorporating a plurality of ring-opening mechanophores each bound at two positions thereof within said polymeric network.
Claims16
A mechanochromic coating composition comprising a polymeric network incorporating a plurality of ring-opening mechanophores each bound at two positions thereof within said polymeric network, wherein said mechanophore comprises spirooxazine and/or indenonaphthopyran.
A method of making a mechanochromic coating composition comprising:
- preparing a curable composition comprising polyurethane precursor components and a ring-opening mechanophore;
- and
- reacting said polyurethane precursor components and said mechanophore, such that said mechanophore is bound at two locations thereof to said polyurethane precursors, thereby producing a polyurethane network having said mechanophore incorporated therein, wherein said mechanophore comprises spirooxazine and/or indenonaphthopyran.
Dependencies are inferred from the claim text.