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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 10632723 B1

PDFFull Text
Date of Patent:
Apr. 28, 2020

Filed:

May. 10, 2019

Polyvinyl acetal and cellulose ester multilayer interlayers

Applicant:

Solutia Inc., St. Louis, MO (US);

Inventors:

Aristotelis Karagiannis, Amherst, MA (US);

Bruce Edward Wade, West Springfield, MA (US);

Khanh D. Tran, South Hadley, MA (US);

Michael Eugene Donelson, Kingsport, TN (US);

Assignee:

Solutia Inc., St. Louis, MO (US);

Attorney:

Steven A. Owen

Primary Examiner:

Sheeba Ahmed

Int. Cl.
CPC ...
B32B 17/08 (2006.01); B32B 27/06 (2006.01); B32B 23/20 (2006.01); B32B 23/08 (2006.01); C08L 1/10 (2006.01); C08L 1/14 (2006.01); B32B 17/10 (2006.01); C08K 5/00 (2006.01); C08K 5/1539 (2006.01); B32B 27/30 (2006.01); B32B 7/02 (2019.01); B32B 27/22 (2006.01);
U.S. Cl.
CPC ...
B32B 17/10761 (2013.01); B32B 17/08 (2013.01); B32B 17/10688 (2013.01); B32B 27/06 (2013.01); C08K 5/0016 (2013.01); C08K 5/1539 (2013.01); C08L 1/10 (2013.01); C08L 1/14 (2013.01); B32B 7/02 (2013.01); B32B 23/08 (2013.01); B32B 23/20 (2013.01); B32B 27/22 (2013.01); B32B 27/306 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2307/412 (2013.01); B32B 2307/42 (2013.01); B32B 2307/544 (2013.01); B32B 2307/546 (2013.01); B32B 2307/56 (2013.01); B32B 2307/71 (2013.01); B32B 2307/732 (2013.01); B32B 2419/04 (2013.01); B32B 2551/00 (2013.01); B32B 2571/02 (2013.01); B32B 2605/006 (2013.01); B32B 2607/02 (2013.01);
Abstract

A multilayer interlayer structure having a first and second polyvinyl acetal (poly(vinyl acetal)) layer and a cellulose ester layer having a thickness of at least 10 mils disposed between the first and second poly(vinyl acetal) layers. The cellulose ester layer can have a higher storage modulus and/or higher Tg than at least one of the poly(vinyl acetal) layers. The interlayer structure is useful to make glass panels having high stiffness and which possess good optical clarity for a variety of applications, including outdoor structural applications.

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