The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 2019
Filed:
Jun. 10, 2015
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Bruce H. Edwards, White Bear Lake, MN (US);
Shri Niwas, Maple Grove, MN (US);
Ying Xia, Woodbury, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/12 (2006.01); G02B 5/128 (2006.01); C08G 18/44 (2006.01); C08G 18/66 (2006.01); C08G 18/76 (2006.01); C08G 18/22 (2006.01); C08G 18/24 (2006.01); C09D 175/06 (2006.01); C08G 18/32 (2006.01); B05D 5/06 (2006.01); B05D 7/00 (2006.01); C08K 5/5465 (2006.01); C23C 14/20 (2006.01); C23C 16/06 (2006.01); C23C 18/42 (2006.01); G02B 1/04 (2006.01); G02B 7/00 (2006.01);
U.S. Cl.
CPC ...
G02B 5/128 (2013.01); B05D 5/06 (2013.01); B05D 7/582 (2013.01); C08G 18/222 (2013.01); C08G 18/246 (2013.01); C08G 18/3206 (2013.01); C08G 18/3215 (2013.01); C08G 18/3221 (2013.01); C08G 18/44 (2013.01); C08G 18/6644 (2013.01); C08G 18/7671 (2013.01); C08K 5/5465 (2013.01); C09D 175/06 (2013.01); C23C 14/20 (2013.01); C23C 16/06 (2013.01); C23C 18/42 (2013.01); G02B 1/04 (2013.01); G02B 7/002 (2013.01);
Abstract
Retroreflective articles include a layer of optical elements, and a polyurethane bead bond layer. The optical elements include transparent microspheres, and at least one reflective layer. The polyurethane bead bond layer is the reaction product of a reaction mixture of at least one aliphatic polycarbonate polyol and at least one polyisocyanate, and the reaction mixture is free of polyols containing unsaturated groups. The retroreflective articles have improved wash durability.