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:
May. 24, 2016
Filed:
Jun. 20, 2013
Kunshan Tianyang Hot Melt Adhesive Co., Ltd., Jiangsu, CN;
Shanghai Tianyang Hot Melt Adhesive Co., Ltd., Shanghai, CN;
East China University of Science and Technology, Shanghai, CN;
Zhelong Li, Shanghai, CN;
Wanyu Zhu, Shanghai, CN;
Fangqun Wu, Shanghai, CN;
Zuoxiang Zeng, Shanghai, CN;
KUNSHAN TIANYANG HOT MELT ADHESIVE CO., LTD, Jiangsu, CN;
SHANGHAI TIANYANG HOT MELT ADHESIVE CO., LTD, Shanghai, CN;
EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY, Shanghai, CN;
Abstract
A polyester/glyoxalated polyvinyl alcohol semi-interpenetrating polymer network hot-melt adhesive and preparation method therefore, mainly includes the steps of: 1) transesterification of certain amounts of dimethyl terephthalate and another dibasic ester with 1,4-butanediol and other diols in the presence of an organotin catalyst under a nitrogen atmosphere in a reactor, completed upon the amount of distillation of a monohydric alcohol byproduct reaching greater than 95% of the theoretical amount; 2) after the temperature is maintained for a period of time, adding in a stabilizer and a polycondensation catalyst and incrementally increasing the temperature to trigger a polycondensation reaction under a reduced pressure to produce particles of a copolymer, and freezing and pulverizing the copolymer particles to produce a powder of a copolyester; 3) uniformly blending a polyvinyl alcohol/glyoxal mixture with the powder produced in step 2) at ambient temperature to produce the target product. The product is capable of forming an internal semi-interpenetrating network at application temperatures.