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Biodegradable aliphatic-aromatic copolyester composition and application thereof

A biodegradable and aliphatic technology, applied in the field of polyester composition, can solve the problems of reduced heat preservation, moisturizing effect, puncture, insufficient tear resistance, etc., so as to reduce the probability of puncture and prevent puncture. , the effect of reducing the water vapor transmission rate

Active Publication Date: 2015-04-01
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, ordinary linear aliphatic-aromatic copolyester (such as PBAT, etc.) and PLA blends have insufficient tear resistance, and when used as a mulch, they are prone to holes under the action of weeds, etc., resulting in thermal insulation and moisturizing effects reduce

Method used

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  • Biodegradable aliphatic-aromatic copolyester composition and application thereof
  • Biodegradable aliphatic-aromatic copolyester composition and application thereof
  • Biodegradable aliphatic-aromatic copolyester composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1

[0053]Put 8.73 Kg of dimethyl terephthalate and 9 Kg of 1,4-butanediol into the reaction kettle, replace the air in the reaction kettle with nitrogen, raise the temperature to 170°C, and wait until the dimethyl terephthalate is completely After melting, 10 g of isopropyl titanate was added, and the temperature was gradually raised to 180° C. for esterification. After the methanol slipping out reaches the theoretical amount, add 7.96 Kg of adipic acid and 142 g of dodecenylsuccinic acid, continue the reaction until the slipping out water reaches the theoretical amount, add 10 g of isopropyl titanate, and gradually heat up to 230~ 250 ° C, about 30 minutes to reduce the pressure in the reactor to below 60Pa, and continue to react under this condition until the power of the stirring motor reaches the set value. The reaction kettle is filled with high-purity nitrogen, and the melt is extruded through a mouth die, and then drawn and pelletized to obtain an aliphatic-aromatic copoly...

Embodiment A2

[0055] Put 11.64Kg of dimethyl terephthalate, 9Kg of 1,4-butanediol, 5.40Kg of adipic acid, and 630g of octenylsuccinic anhydride into the reactor, and gradually raise the temperature to 170 o C, add 20g of n-butyl titanate, after methanol and water have slipped out to reach the theoretical amount, gradually raise the temperature to 230~250 o C, reduce the pressure in the reactor to below 60Pa for about 30 minutes, and continue to react under this condition until the power of the stirring motor reaches the set value; fill the reactor with high-purity nitrogen, press the melt out through the mouth mold, and then pull it Copolyester base material A20 is obtained by stripping and pelletizing; A20 is dried, mixed with 0.6% hexamethylene diisocyanate, reacted in a twin-screw extruder, and pelletized to obtain alkyl side chain aliphatic - Aromatic copolyesters.

[0056] Change the ratio of aromatic dibasic acid, aliphatic dibasic acid and aliphatic dibasic acid containing alkyl / alk...

Embodiment 1~9 and comparative example 1~4

[0061] Mix the aliphatic-aromatic copolyester A containing alkyl / alkoxy side chains, polylactic acid, and the compatibilizer as a compatibilizer in a high-speed mixer according to the ratio in Table 2, and then use a weighing scale to add In the twin-screw extruder, at 170~220 o C Extrusion granulation to obtain biodegradable aliphatic-aromatic copolyester composition.

[0062] Table 2 The ratio of biodegradable aliphatic-aromatic copolyester composition P

[0063]

[0064] Table 3 Performance test results of biodegradable aliphatic-aromatic copolyester composition P

[0065]

[0066] As can be seen from Table 2 and Table 3, due to the addition of a specific ratio of alkyl / alkoxy side chain-containing aliphatic dibasic acid ester units, the biodegradation of the film produced by the aliphatic-aromatic copolyester composition The yield strength is improved, which is conducive to improving the puncture performance of agricultural mulch films against crops and weeds, and ...

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Abstract

The invention discloses a biodegradable aliphatic-aromatic copolyester composition. The biodegradable aliphatic-aromatic copolyester composition contains the following ingredients in percentage by mass: A: 69.95-89.95% of alkyl / alkoxy side chain-containing aliphatic-aromatic copolyester, B: 10-30% of polylactic acid and C: 0.05-3% of compatibilizer, wherein the A contains the following ingredients in percentage by mass: A1: 44-60% of aromatic polyester unit, A2: 39-55% of straight-chain aliphatic polyester unit and A3: 0.3-3% of alkyl / alkoxy side chain-containing aliphatic dibasic acid ester unit. According to the biodegradable aliphatic-aromatic copolyester composition disclosed by the invention, the alkyl / alkoxy side chain-containing aliphatic dibasic acid ester unit of a specific proportioning ratio is added, so that the yield strength of manufactured films is improved, the improvement of crop and weed puncture resistance of agricultural mulching films is facilitated, and the probability of occurrence of a hole breaking phenomenon is reduced; the oxygen gas permeability is improved, and the water vapor permeability is lowered, so that the manufactured films have better heat preserving and moisture preserving effects as the agricultural mulching films.

Description

technical field [0001] The invention belongs to the technical field of polyester compositions, in particular to a biodegradable aliphatic-aromatic copolyester composition containing alkyl / alkoxy side chains and its application in the agricultural mulch industry. Background technique [0002] At present, most of the plastic films used in agricultural production are synthetic polymers, such as polyethylene (PE), polyvinyl chloride (PVC), etc. While the use of these plastic film materials has brought certain economic benefits to agriculture, it has also caused serious white pollution to the environment. These materials will exist stably in the natural environment for a long time. A large number of mulch film fragments left in the land destroy the soil structure, harden the soil, hinder crops from absorbing water and fertilizers from the soil, and lead to crop yield reduction after long-term use. Recycling mulch from the field is a lot of work and costly, and it is difficult to...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08L67/04C08G63/52
Inventor 赵巍焦建叶丹滢苑仁旭熊凯钟宇科徐依斌吴水珠
Owner KINGFA SCI & TECH CO LTD
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