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 9662864 B1

Date of Patent:

May. 30, 2017

Filed:

Apr. 24, 2014

Tie-layer adhesives for styrenic multi-layer structures

Applicant:

Equistar Chemicals, Lp, Houston, TX (US);

Inventor:

Maged G. Botros, Liberty Township, OH (US);

Assignee:

Equistar Chemicals, LP, Houston, TX (US);

Attorney:

Primary Examiner:

Sheeba Ahmed

Int. Cl.

CPC ...

B32B 27/08 (2006.01); B32B 7/12 (2006.01); B32B 27/30 (2006.01); B32B 27/34 (2006.01); B32B 27/32 (2006.01); B29C 47/92 (2006.01); B29C 47/00 (2006.01); B29C 47/06 (2006.01); B29K 23/00 (2006.01); B29K 77/00 (2006.01);

U.S. Cl.

CPC ...

B32B 27/08 (2013.01); B29C 47/065 (2013.01); B29C 47/067 (2013.01); B29C 47/92 (2013.01); B32B 7/12 (2013.01); B32B 27/302 (2013.01); B32B 27/304 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); B32B 27/322 (2013.01); B32B 27/327 (2013.01); B32B 27/34 (2013.01); B29C 47/0004 (2013.01); B29C 2947/92695 (2013.01); B29K 2023/0633 (2013.01); B29K 2023/086 (2013.01); B29K 2077/00 (2013.01); B32B 2270/00 (2013.01); B32B 2439/00 (2013.01); Y10T 428/3192 (2015.04); Y10T 428/31544 (2015.04); Y10T 428/31746 (2015.04); Y10T 428/31757 (2015.04); Y10T 428/31913 (2015.04); Y10T 428/31917 (2015.04);

Abstract

A multilayer structure and a method for forming a multilayer structure, the multilayer structure includes: (A) a first polyolefin layer; (B) a styrene polymer layer; (C) a second polyolefin layer; and (D) at least one tie-layer comprising a tie-layer composition. The tie-layer composition includes: (1) 25 to 75 wt. %, based upon the total weight of the tie-layer composition, of a first copolymer, wherein the first copolymer comprises ethylene derived units and units derived from a Cα-olefin; (2) 5 to 25 wt. %, based upon the total weight of the tie-layer composition, of a polyethylene resin grafted with an ethylenically unsaturated carboxylic acid or acid derivative; (3) 20 to 50 wt. %, based upon the total weight of the tie-layer composition, of a triblock copolymer composition; and (4) optionally, 0.001 to 20 wt. %, based upon the total weight of the tie-layer composition, of a low density polyethylene.

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