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.:
Date of Patent:
Nov. 25, 2025
Filed:
Jun. 30, 2022
Henghe Materials & Science Technology Co., Ltd., Zhejiang, CN;
Henghe Materials & Science Technology Co., Ltd., Zhejiang, CN;
Abstract
The present invention relates to a preparation method of a BOPP film stiffening agent, including: taking cyclopentadiene or a derivative thereof and a norbornene monomer or C8 cycloolefin as a polymerization raw material, obtaining a polymerization resin liquid by continuous high-temperature polymerization, then preparing high-softening-point aliphatic hydrogenation petroleum resin through two-stage catalytic hydrogenation reaction and removing low-boiling-point light components and solvents; and then obtaining the BOPP film stiffening agent by mixing and extruding with homo-polypropylene. The stiffening agent prepared by the present invention has a very good anti-dissolution performance and environmental protection performance which is suitable for modification of a BOPP cigarette film, and has good market application prospects.