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Carbon dioxide-propylene oxide copolymer composition

A technology of propylene oxide and carbon dioxide, which is applied in the field of carbon dioxide-propylene oxide copolymer composition, can solve problems such as sticking and agglomeration of blends, sticking and agglomeration, and affecting use, so as to achieve simple preparation process and prevent sticking and agglomeration , the effect of convenient storage

Active Publication Date: 2011-01-05
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although carbon dioxide-propylene oxide copolymer has good properties, it is an amorphous substance with a low glass transition temperature (Tg), about 20°C to 40°C. Therefore, when the temperature is above 25°C, carbon dioxide-ring Propylene oxide copolymer will stick and agglomerate, which is not conducive to transportation and storage, and will also affect subsequent use, which limits the application of carbon dioxide-propylene oxide copolymer
However, in an environment with a temperature higher than 70°C, for example, when the temperature in the container is higher than 70°C during transportation, the blend will still appear sticking and caking, which affects the use of the blend
In addition, this method requires the use of a large amount of polybutylene succinate, and the polybutylene succinate is produced by Showa Highpolymer CO, LTD. in Japan, and the polybutylene succinate supplied by the company Butylene glycol esters are high-molecular-weight polybutylene succinates with a molecular weight of more than 45,000, and the price is higher, thereby greatly increasing the cost of the carbon dioxide-propylene oxide copolymer blend

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Add 4g of tetra-n-butyl titanate and 3000g of succinic acid and butanediol mixture to a 5L polymerization reactor equipped with mechanical stirring, wherein the molar ratio of succinic acid and butanediol is 1:1.4, and the reactor is passed through After nitrogen replacement, start stirring, heat up to 165°C to start water discharge, until the water output reaches the theoretical water output, raise the temperature to 240°C, then slowly reduce the pressure to 100Pa, continue the reaction for 3 hours, and obtain viscous white PBS; The PBS was measured, and its number average molecular weight was 6000, and its molecular weight distribution was 1.3.

[0046] The number average molecular weight is 90,000, the molecular weight distribution is 4.5, and the PPC with a glass transition temperature of 30° C. is used as a raw material. The PPC is purchased from Inner Mongolia Mengxi High-tech Group Company; Carbon black, 10g glyceryl monostearate, 10g liquid paraffin and 10g tetr...

Embodiment 2

[0049] Add 4g of tetra-n-butyl titanate and 3000g of succinic acid and butanediol mixture to the 5L polymerization reactor equipped with mechanical stirring, wherein the molar ratio of succinic acid and butanediol is 1: 1.8, and the reactor is passed through After nitrogen replacement, start stirring, heat up to 170°C to start water discharge, until the water output reaches the theoretical water output, raise the temperature to 235°C, then slowly reduce the pressure to 90Pa, continue the reaction for 3 hours, and obtain viscous white PBS; The PBS was measured, and its number average molecular weight was 2500, and its molecular weight distribution was 2.0.

[0050] The number average molecular weight is 59000, the molecular weight distribution is 6.3, and the PPC with a glass transition temperature of 26 ° C is used as a raw material. The PPC is purchased from Inner Mongolia Mengxi High-tech Group Company; 880g of the above-mentioned PPC, 80g of the above-mentioned PBS, and 10g ...

Embodiment 3

[0053] Add 8g of stannous octoate and 3000g of succinic acid and butanediol mixture in the 5L polymerization reactor equipped with mechanical stirring, wherein the mol ratio of succinic acid and butanediol is 1: 1.6, after the reactor is replaced with nitrogen , start stirring, heat up to 170°C to start water discharge, until the water output reaches the theoretical water output, raise the temperature to 245°C, then slowly reduce the pressure to 80Pa, continue the reaction for 3 hours, and obtain viscous white PBS; for the PBS When measured, the number average molecular weight was 4500, and the molecular weight distribution was 1.5.

[0054] The number average molecular weight is 190,000, the molecular weight distribution is 2.9, and the PPC with a glass transition temperature of 38°C is used as a raw material. The PPC is purchased from Inner Mongolia Mengxi High-tech Group Company; 875g of the above-mentioned PPC, 150g of the above-mentioned PBS, 10g of the precipitation Carb...

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Abstract

The invention provides a carbon dioxide-propylene oxide copolymer composition comprising the following components: 80 to 97 parts by weight of carbon dioxide-propylene oxide copolymer, 1 to 15 parts by weight of polybutylene succinate, 0.5 to 3.0 parts by weight of inorganic filler, 0.5 to 5 parts by weight of lubricant and 0.5 to 2 parts by weight of heat stabilizer, wherein the number-average molecular weight of the polybutylene succinate is less than 10000. In the process of component blending, the PBS (Polybutylene Succinate) with the number-average molecular weight less than 10000, the inorganic filler, the lubricant and the stabilizer form a core-shell structure on surfaces of PPC (Poly(Propylene Carbonate)) particles so as to isolate the PPC so that the PPC particles can not adhere to agglomerate, is convenient for storage and transport and can not affect the subsequent use. Experiments show that the phenomena of adhesion and agglomeration of the PPC composition provided by the invention do not occur when the PPC composition is placed in a constant temperature oven of 75 DEG C for 24h.

Description

technical field [0001] The invention relates to the field of polymer compositions, in particular to a carbon dioxide-propylene oxide copolymer composition. Background technique [0002] Carbon dioxide-propylene oxide copolymer (PPC), also known as polypropylene carbonate or polypropylene carbonate, is an aliphatic polycarbonate formed by copolymerization of carbon dioxide and propylene oxide. PPC was first synthesized by Japanese scientist Inoue Xiangping and others (Inoue, S., Koinuma, H., Tsuruta, T., J.Polym.Sci., Polym.Lett.Ed., 1969, 7, 287-292.), And it has realized the industrialization first in our country. For example, Inner Mongolia Mengxi High-tech Group Company can provide carbon dioxide-propylene oxide copolymers with various molecular weights. Carbon dioxide-propylene oxide copolymers have good barrier properties, biocompatibility, biodegradability and physical and mechanical properties, and have broad application prospects in the fields of packaging materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/02C08K13/02
Inventor 周庆海高凤翔王献红赵晓江王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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