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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.:

US 11638775 B1

PDFFull Text
Date of Patent:
May. 02, 2023

Filed:

Sep. 26, 2016

Hydrogel compositions bonded to polymeric substrates

Applicant:

3m Innovative Properties Company, St. Paul, MN (US);

Inventors:

Alexi J. Young, Shoreview, MN (US);

Jerald K. Rasmussen, Woodville, WI (US);

Assignee:

3M Innovative Properties Company, St. Paul, MN (US);

Attorney:
Primary Examiner:

Ronak C Patel

Int. Cl.
CPC ...
C08J 7/06 (2006.01); C08J 3/075 (2006.01); C09D 4/00 (2006.01); A61L 15/60 (2006.01); C08L 33/10 (2006.01); C08L 33/26 (2006.01); C08F 220/54 (2006.01); C08J 7/04 (2020.01); C08J 7/043 (2020.01); C08J 7/056 (2020.01);
U.S. Cl.
CPC ...
A61L 15/60 (2013.01); C08F 220/54 (2013.01); C08J 7/043 (2020.01); C08J 7/0427 (2020.01); C08J 7/056 (2020.01); C08L 33/10 (2013.01); C08L 33/26 (2013.01); C09D 4/00 (2013.01); C08J 2375/04 (2013.01); C08J 2400/14 (2013.01); C08J 2433/06 (2013.01); C08J 2433/26 (2013.01);
Abstract

Described herein is a multilayer article comprising: a. a polymer substrate comprising an abstractable atom; and b. a hydrogel coating thereon wherein the hydrogel coating has a water content of at least 10 wt % and is covalently bonded to the polymer substrate, and wherein the hydrogel coating is derived from an aqueous composition having a pH less than 9.5, the aqueous composition comprising: (a) a hydrophilic monomer selected from at least one of (meth)acrylate or (meth)acrylamide; (b) at least 0.1 wt % of a water-swellable clay; (c) a first initiator, wherein the first initiator is water-soluble and is a Type I photoinitiator; and (d) a second initiator, wherein the initiator is water-soluble and is a Type II photoinitiator; and (e) an acid.

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