Kingfa Sci.&tech.co., Ltd.

Zhuhai Wango Chemical Co., Ltd.

Tianjin Kingfa New Material Co., Ltd.

Shanghai Kingfa Sci.&tech.co., Ltd.

Zhilong Guo

Xiangbin Zeng

Xianbo Huang

Tongmin Cai

Weiwei Wang

Changli Lu

Hui Yang

Wei Zhao

Zhimin Yuan

Renxu Yuan

Meijun Tang

Nanbiao Ye

Jian Jiao

Xueteng Dong

Kai Xiong

Kaijin Mai

Yuke Zhong

Renxu Ruan

The present invention relates to a biodegradable polyester and use thereof, including components: A) acid components containing following repeating units: 50 to 58 mol % of terephthalic acid A1; 30 to 40 mol % of sebacic acid A2; and 2 to 20 mol % of an aliphatic dibasic acid A3 with a carbon chain length of 6 or less; B) butanediol. In the present invention, in the case of a high content of the terephthalic acid, the biodegradable polyester prepared by introducing an aliphatic dibasic acid unit having a carbon chain length of 6 or less can satisfy the degradation performance and rigidity and improve the tenacity of the material simultaneously.

Biodegradable polyester and use thereof

A biodegradable polyester and use thereof includes components: A) acid components containing following repeating units: 40 to 48 mol % of terephthalic acid A1; 38.5 to 50 mol % of sebacic acid A2; and 2 to 20 mol % of an aliphatic dibasic acid A3 with a carbon chain length of 6 or less; B) butanediol. In the case of low content of the terephthalic acid unit, by introducing the aliphatic dibasic acid unit with the carbon chain length of 6 or less, mechanical properties of the material can be significantly improved, and the mechanical property retention is better especially when stored in a humid environment.

The present invention discloses a poly(terephthalate-co-sebacate) resin composition, comprising the following components: a. poly(terephthalate-co-sebacate); and b. an alkane, which is at least one selected from the group consisting of hexadecane, heptadecane, octadecane, nonadecane and eicosane; wherein a weight content of the alkane is 5 ppm-1000 ppm based on a total weight of the poly(terephthalate-co-sebacate) resin composition. The present invention controls the content of alkane in the composition within a range of 5 ppm-1000 ppm by adding an alkane, which not only enables the poly(terephthalate-co-sebacate) resin to have obviously improved blow molding properties, a film thickness range of less than 0.3 &#x3bc;m, and a relative deviation of film thickness of less than 2.0%, thereby guaranteeing a bubble stability and a continuity of blow molding, but also enables the film material to prevent the ink from stripping off the film material, and to prevent excessive ink from adhering to the film material in the printing process, so that the film shows excellent printing performance.

Poly(terephthalate-co-sebacate) resin composition

The present invention discloses a PBS resin composition and a preparation method thereof. The composition comprises: a. PBS resin; b. element titanium; c. element phosphorus, wherein a weight ratio range of titanium to phosphorus is 0.6-10:1, preferably 0.7-4:1, and more preferably 1.25-1.5:1. A weight content of the element titanium is 20-200 ppm, and a weight content of the element phosphorus is 15-70 ppm. By adding a titanium-containing compound and a phosphorus-containing compound and controlling the range of the weight ratio of the element titanium to the element phosphorus in the PBS resin composition to be 0.6-10:1, the present invention obtains a PBS resin composition. After treating in a 95&#xb0; C.-distilled water bath for 12 hours and drying at 90&#xb0; C. for 3 hours, a change of the melt flow index of the PBS resin composition is less than 50.0 g/10 min, and the PBS resin composition possesses an obviously improved hydrolysis property.

PBS resin composition and preparation method thereof

The present invention discloses a PBAT resin composition comprising following components: (a) poly(butyleneadipate-co-terephthalate); (b) iron element; wherein, based on a total weight of the PBAT resin composition, a weight content of the iron element is 1 ppm-500 ppm. By adding iron-containing compounds into the composition and controlling the content of the iron element in a range of 1 ppm-500 ppm in the composition, a speed of reaction of aromatic structure in the PBAT resin under a hot and humid condition can be postponed, so that after the prepared PBAT resin composition is aged in boiling water for 24 hours and 48 hours, a variation of b-value is less than 2. The PBAT resin composition has obviously improved color stability in resistance to boiling water aging.

PBAT resin composition

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Guangdong, China

Zhilong Guo