China Petroleum & Chemical Corporation

Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation

Boe Technology Group Co., Ltd.

Chengdu Boe Optoelectronics Technology Co., Ltd.

Beijing Research Institute of Chemical Industry

Guixiang Zhu

Wei Zhang

Ling Han

Cui Zheng

Ning Xu

Lizhi Liu

Wenxi Ji

Yi Zou

Wei Chen

Peng Guo

Nan Chen

Yi Yang Ren

Ying Shi

Tsanghong Wang

Yao Liang

Mingfu Lyu

Hsinwei Huang

Taoyi Zhang

Yanxia Zhang

Xirong Chen

Jinglan Lu

Yifan Yan

Xuerong Yao

Minqiao Ren

Mancheng Zhou

A biodegradable film is prepared from a composition that includes a copolyester obtained by extrusion reaction of a branched aliphatic-aromatic copolyester derived from monomer a, monomer b, monomer c and monomer d with an organic peroxide. The film can be completely degraded into small molecular products such as carbon dioxide, water and the like under natural or composting conditions. Moreover, the film can be prepared having a thickness of 4-50 μm as required, and its mechanical properties can reach the same level as or even better than those of LDPE film.

High strength ultra-thin biodegradable film and preparation method thereof

A display panel includes multiple pixel units that are arranged regularly. A pixel circuit is connected with a scanning signal line and a data signal line. The pixel circuit receives a data voltage transmitted by the data signal line and outputs a corresponding current to a light emitting device under a control of the scanning signal line. When a first light emitting unit is in a black state, the data signal line provides a reference black state voltage to a pixel circuit of the first light emitting unit. The driving method of the display panel includes: providing, by the data signal line, a first black state voltage to a pixel circuit of a second light emitting unit when the first light emitting unit emits light and the second light emitting unit is in the black state. The first black state voltage is less than the reference black state voltage.

Display panel, driving method thereof and display apparatus

A polyester composition includes a first polyester selected from one or more of aliphatic-aromatic copolyesters, which is a copolymer comprising repeating units A as shown in formula (I) and repeating units B as shown in formula (II), in which m is an integer of 2 to 10 and n is an integer of 2 to 8; p is an integer of 2 to 10; and m, n and p are the same or different from each other. Optionally, the polyester composition has a second polyester. The polyester composition includes at least two polyesters. The polyester composition can be used in shape memory materials, 3D print wires, heat shrinkable sleeves, functional layers, medical limb immobilization braces, heat shrinkable thin films, nonwoven fabrics, elastic fibers, etc. 

Polyester composition, preparation method therefor and application thereof

A polyester composition includes polybutylene terephthalate and an aliphatic-aromatic copolyester. Based on the total weight of the polybutylene terephthalate and the aliphatic-aromatic copolyester, the content of the polybutylene terephthalate is from 50 to 99% by weight, and the content of the aliphatic-aromatic copolyester is from 1 to 50% by weight. Further, a method for preparing such a polyester composition and a toughened composite material prepared therefrom. The polyester composition has an elongation at break of up to 230% or more, and an improved toughness without substantial loss of strength.

Polyester composition and preparation method therefor

A polyester composition, includes an aliphatic polyester and an aliphatic-aromatic copolyester. The aliphatic-aromatic copolyester is a copolymer having a repeating unit A and a repeating unit B. The preparation method for the polyester composition includes the steps of mixing all the components having the aliphatic polyester and the aliphatic-aromatic copolyester, and subjecting the resulting mixture to extrusion granulation.

The present invention relates to a transparent copolyester, wherein the transparent copolyester comprises an aliphatic-aromatic copolyester segment A, a segment B having repeating units &#x2014;O&#x2014;CH(CH)&#x2014;C(O)&#x2014;, and structural units C derived from polyisocyanate(s), wherein the weight ratio for the segment A, segment B and structural unit C is 100:(100-2000):(0.1-10) and wherein the weight-average molecular weight Mw of the transparent copolyester is from 50,000 to 1,000,000. The present invention further relates to a preparation method for a transparent copolyester, including polymerizing lactide, a hydroxyl-terminated aliphatic-aromatic copolyester and a polyisocyanate in the presence of a catalyst; wherein the weight ratio for the aliphatic-aromatic copolyester, lactide and polyisocyanate is 100:(100-2000):(0.1-10). The present invention further relates to a transparent copolyester prepared by said method and an article made from the transparent copolyester according to present invention.

Transparent copolyester, preparing method thereof and articles made from the same

The present invention relates to a biodegradable composite and its preparation process, which composite is prepared by mixing feed stocks comprising a polylactic acid, an aliphatic-aromatic copolyester A, an aliphatic-aromatic copolyester B and an organic peroxide at a temperature between about 100 and about 200&#xb0; C. The present invention also relates to a disposable article, which is prepared from said biodegradable composite.

Biodegradable composite, the preparation process thereof, and a disposable article made therefrom

The present invention relates to a biodegradable copolyester of high molecular weight and narrow molecular weight distribution. The copolyester has a Mof 100,000-600,000 g/mol, and a molecular weight distribution of 1.2-3. The process for synthesizing the polyester comprises the steps of: 1) adding the following monomers and an optional catalyst component Cat1 to carry out interesterification and/or esterification: (a) aromatic dicarboxylic acid, ester thereof, anhydride thereof, or mixture thereof, (b) aliphatic diol, alicyclic diol or mixture thereof, and (c) aliphatic dicarboxylic acid, alicyclic dicarboxylic acid, ester thereof, anhydrides thereof, or a mixture thereof; 2) prepolymerizing the reaction system under vacuum; and adding a catalyst component Cat2 to the prepolymerized product; wherein the catalyst component Cat1 is selected from the group consisting of the compounds of Ti, Sb and Zn, and mixtures thereof; and the catalyst component Cat2 is selected from the compounds of RE and mixtures thereof.

Biodegradable linear random copolyester and process for preparing it and use of the same

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Beijing, China

Guixiang Zhu