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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 11365329 B1

PDFFull Text
Date of Patent:
Jun. 21, 2022

Filed:

Oct. 11, 2018

Hot melt adhesive compositions based on propylene-based polymers and methods for using same

Applicant:

Bostik, Inc., Wauwatosa, WI (US);

Inventors:

Baoyu Wang, Waukesha, WI (US);

Ronald F. Graf, South Milwaukee, WI (US);

Russell Stuczynski, Waukesha, WI (US);

Assignee:

Bostik, Inc., Wauwatosa, WI (US);

Attorney:

Christopher R. Lewis

Primary Examiner:

Sheeba Ahmed

Int. Cl.
CPC ...
C09J 7/35 (2018.01); C09J 11/08 (2006.01); C09J 123/14 (2006.01); C08L 23/14 (2006.01); B32B 7/12 (2006.01); B32B 27/12 (2006.01); B32B 27/32 (2006.01); B32B 5/26 (2006.01); B32B 3/04 (2006.01); C09J 7/24 (2018.01); C09J 7/21 (2018.01); B32B 5/02 (2006.01); B32B 37/12 (2006.01);
U.S. Cl.
CPC ...
C09J 7/35 (2018.01); B32B 5/022 (2013.01); B32B 7/12 (2013.01); B32B 27/12 (2013.01); B32B 27/32 (2013.01); B32B 37/1207 (2013.01); C08L 23/14 (2013.01); C09J 7/21 (2018.01); C09J 7/243 (2018.01); C09J 11/08 (2013.01); C09J 123/14 (2013.01); B32B 2037/1215 (2013.01); B32B 2555/02 (2013.01); C08L 2205/03 (2013.01); C08L 2314/06 (2013.01); C09J 2400/263 (2013.01); C09J 2423/04 (2013.01); C09J 2423/046 (2013.01); C09J 2423/10 (2013.01); C09J 2491/00 (2013.01);
Abstract

A polymer composition for use in a hot melt adhesive comprises at least one semierystalline, low molecular weight (LMW) propylene-based polymer; at least one essentially amorphous, high molecular weight (HMW) propylene-based polymer; and at least one essentially amorphous, LMW propylene-based polymer. A hot melt adhesive composition further contains a tackifier, a plasticizer, an antioxidant, and optionally a wax, a filler, a colorant, a UV absorber, another polymer, or combinations thereof. The hot melt adhesive is useful for a variety of industrial applications where bonding of low surface energy substrates is encountered, including disposable nonwoven hygienic articles, labeling and other assembly applications. Particularly preferred applications include nonwoven disposable diaper and feminine sanitary napkin construction, diaper and adult incontinent brief elastic attachment, diaper and napkin core stabilization, diaper backsheet lamination, industrial filter material conversion, and surgical gown and surgical drape assemblies. The composition demonstrates improved peel strength while maintaining very good creep resistance.

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