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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 11898023 B1

PDFFull Text
Date of Patent:
Feb. 13, 2024

Filed:

Dec. 22, 2020

Polyolefin photovoltaic backsheet comprising a stabilized polypropylene layer

Applicant:

Dow Global Technologies Llc, Midland, MI (US);

Inventors:

Jeffrey E. Bonekamp, Midland, MI (US);

Huiqing Zhang, Midland, MI (US);

Fanny Deplace, Lake Jackson, TX (US);

Assignee:

Dow Global Technologies LLC, Midland, MI (US);

Attorney:

Boyle Fredrickson, S.C.

Primary Examiner:

Karuna P Reddy

Int. Cl.
CPC ...
C08L 23/12 (2006.01); H01L 31/049 (2014.01); C08K 5/3435 (2006.01); C08K 5/3492 (2006.01); C08L 23/10 (2006.01); C08L 23/16 (2006.01); C08K 5/36 (2006.01); C08K 5/3432 (2006.01); C08L 51/06 (2006.01); C08K 5/3472 (2006.01); C08L 23/08 (2006.01); C08K 5/00 (2006.01); C08K 5/101 (2006.01); C08K 5/3462 (2006.01); C08K 5/372 (2006.01); H01L 31/048 (2014.01);
U.S. Cl.
CPC ...
C08K 5/3435 (2013.01); C08K 5/005 (2013.01); C08K 5/101 (2013.01); C08K 5/3432 (2013.01); C08K 5/3462 (2013.01); C08K 5/3472 (2013.01); C08K 5/3492 (2013.01); C08K 5/36 (2013.01); C08K 5/372 (2013.01); C08L 23/0815 (2013.01); C08L 23/10 (2013.01); C08L 23/16 (2013.01); C08L 51/06 (2013.01); H01L 31/049 (2014.12); H01L 31/0481 (2013.01); C08J 2323/10 (2013.01); C08L 2205/025 (2013.01); Y02E 10/50 (2013.01);
Abstract

Polyolefin photovoltaic (PV) backsheets comprise a polypropylene layer stabilized with (A) at least one hindered amine with 2,2,6,6-tetraalkylpiperdine or 2,2,6,6 -tetraakylpiperazinone, either or both in combination with a triazine moiety, (B) a thioester, and, optionally, (C) at least one hindered hydroxybenzoate, and/or (D) an ortho hydroxyl triazine compound. These PV backsheets exhibit a low flame spread index of <100 without the use of FR agents, and the polypropylene layer exhibits good weatherability while providing the required long term heat aging performance necessary for PV modules.

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