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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 11377508 B1

PDFFull Text
Date of Patent:
Jul. 05, 2022

Filed:

Dec. 29, 2020

Temperature-responsive poly(2-hydroxyethyl methacrylate) (phema) and preparation method thereof

Applicant:

Changzhou University, Changzhou, CN;

Inventors:

Wenyan Huang, Changzhou, CN;

Di Zhu, Changzhou, CN;

Bibiao Jiang, Changzhou, CN;

Xiaoqiang Xue, Changzhou, CN;

Hongjun Yang, Changzhou, CN;

Li Jiang, Changzhou, CN;

Qimin Jiang, Changzhou, CN;

Assignee:

CHANGZHOU UNIVERSITY, Changzhou, CN;

Attorney:

Bayramoglu Law Offices LLC

Primary Examiner:

Richard A Huhn

Int. Cl.
CPC ...
C08F 20/20 (2006.01); C08L 33/14 (2006.01); C08F 2/32 (2006.01); C08F 4/40 (2006.01); C08F 120/20 (2006.01);
U.S. Cl.
CPC ...
C08F 120/20 (2013.01); C08F 2/32 (2013.01); C08F 4/40 (2013.01); C08F 20/20 (2013.01); C08L 33/14 (2013.01); C08L 2666/68 (2013.01);
Abstract

Temperature-responsive poly(2-hydroxyethyl methacrylate) (PHEMA) and a preparation method thereof are disclosed. In the preparation method, with a system consisting of benzoyl peroxide (BPO) (an oxidant) and 2-methyl-N-[3-(methyl-phenyl-amino)-propyl]-acrylamide (MPAEMA) or 2-methyl-N-[3-(methyl-phenyl-amino)-propyl]-propionamide (MEMA) (a reducing agent monomer) as a redox initiation system, water and toluene as media, a nonionic surfactant as an emulsifier, and 2-hydroxyethyl methacrylate (HEMA) as a polymerization monomer, polymerization is conducted at room temperature and atmospheric pressure to obtain the PHEMA. An alcohol solution of the PHEMA has an upper critical solution temperature (UCST). The method has the advantages of simple and stable polymerization system, low polymerization cost, easy operation, mild conditions, small impact on the environment, and low energy consumption. Moreover, a molecular weight and UCST of a product are controllable within a specified range.

Find Patent Forward Citations

Huang, Wenyan. (2022). Temperature-responsive poly(2-hydroxyethyl methacrylate) (phema) and preparation method thereof (U.S. Patent No. 11377508). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11377508

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