Biodegradable plastic as well as preparation method and application thereof

A technology of biodegradable plastics and plasticizers, applied in applications, clothing, protective clothing, etc., can solve the problems of unsuitable medical protective clothing and sanitary napkins, poor air permeability and water absorption, and increase water vapor transmission Sexuality, increase migration ability, and accelerate the effect of degradation speed

Pending Publication Date: 2022-04-05
CHONGQING HETAI PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides biodegradable plastics, preparation methods and applications thereof, which solve the problem of poor air permeability and water absorption in the prior art, and therefore are not suitable for medical use Issues in areas such as protective clothing and sanitary napkins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The raw materials in this example include the following components calculated in parts by weight: 50 parts of PBAT modified polyester; 15 parts of polylactic acid PLA; 10 parts of hydroxyl modifier; 1 part of chain extender; 1 part of plasticizer; 23 parts of mixture of talcum powder and calcium carbonate in a weight ratio of 2:1:1. Wherein the hydroxyl modifier is clove oleoresin, the plasticizer is glycerin, and the weight ratio of 1,4-butanediol and trihydroxypropyl hydroxyethyl ethylenediamine in the chain extender is 2.2:2.

[0042] The composition of the PBAT modified polyester includes the following components calculated in parts by weight: 35 parts of butylene adipate; 37 parts of butylene terephthalate; isophthalic acid-5-sulfonic acid 9 parts of sodium; 15 parts of polyethylene glycol; 4 parts of thiamine pyrophosphate TPP as stabilizer.

[0043] The preparation process of this embodiment comprises the following steps:

[0044] (1) First prepare PBAT modifie...

Embodiment 2

[0050]The raw materials in this example include the following components calculated in parts by weight: 40 parts of PBAT modified polyester; 12 parts of polylactic acid PLA; 7 parts of hydroxyl modifier; 0.6 parts of chain extender; 0.6 parts of plasticizer; , 39.8 parts of a mixture of talcum powder and calcium carbonate in a weight ratio of 1.5:1:1. Wherein the hydroxyl modifier is a mixture of acetyl tributyl citrate and maleic anhydride in a weight ratio of 1:1, the plasticizer is a mixture of dimethylamide and citric acid in a weight ratio of 1:1, and the chain extender is 1,4 The weight ratio of butanediol to trihydroxypropyl hydroxyethyl ethylenediamine is 2.5:2.

[0051] The composition of the PBAT modified polyester includes the following components calculated in parts by weight: 51 parts of butylene adipate; 40 parts of butylene terephthalate; isophthalic acid-5-sulfonic acid 3 parts of sodium; 5 parts of polyethylene glycol; 0.5 parts of antioxidant 1010 as a stabi...

Embodiment 3

[0059] The raw materials in this embodiment include the following components calculated in parts by weight: 30 parts of PBAT modified polyester; 8 parts of polylactic acid PLA; 4 parts of hydroxyl modifier; 0.3 parts of chain extender; 0.2 parts of plasticizer; , 57.5 parts of a mixture of talcum powder and calcium carbonate in a weight ratio of 1:1:1. Wherein the hydroxyl modifier is the weight ratio 1:1:1 mixture of clove oleoresin, acetyl tributyl citrate and maleic anhydride, and plasticizer is the weight ratio 1:1 of dimethylamide, citric acid and ethylene glycol 1:1 mixture, the weight ratio of 1,4-butanediol and trihydroxypropyl hydroxyethyl ethylenediamine in the chain extender is 2.8:2.

[0060] The composition of the PBAT modified polyester includes the following components calculated in parts by weight: 60 parts of butylene adipate; 25 parts of butylene terephthalate; isophthalic acid-5-sulfonic acid 4 parts of sodium; 10 parts of polyethylene glycol; 1 part of a m...

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Abstract

The invention provides a biodegradable plastic. The biodegradable plastic comprises the following components: 30-50 parts of PBAT modified polyester; and 8-15 parts of polylactic acid (PLA). 4 to 10 parts of a hydroxyl modifier; 0.3-1 part of a chain extender; 0.5 to 1 part of a plasticizer; and the balance of starch. The invention further provides a preparation method of the biodegradable plastic and application of the biodegradable plastic in medical protective clothing and sanitary towels. The chain extender is added, so that the chain extender can be subjected to chain extension reaction with the PLA and the PBAT in the processing process, tension between two phase interfaces is reduced, efficient fusion of the PLA and the PBAT is achieved, the problem of interfacial compatibility of the PLA and the PBAT is solved, overall molecules of the polymer are more regular, and water molecules can pass through easily; the treated starch and the hydroxyl modifier are added to increase the permeability of water vapor, so that the water absorption of the whole plastic material is enhanced, the plastic material can be better suitable for the fields of medical protective clothing, sanitary towels and the like, and the environmental protection performance is also improved.

Description

technical field [0001] The invention relates to the technical field of biodegradable plastics, in particular to biodegradable plastics, a preparation method for the biodegradable plastics and applications thereof. Background technique [0002] Biodegradable plastics refer to a class of plastics that are degraded by the action of naturally occurring microorganisms such as bacteria, molds (fungi) and algae. The ideal biodegradable plastic is a polymer material that has excellent performance, can be completely decomposed by environmental microorganisms after being discarded, and is finally inorganicized to become an integral part of the carbon cycle in nature. Due to its good degradability, biodegradable plastics are mainly used as food soft and hard packaging materials, which is also its largest application field at this stage. [0003] Biodegradable plastics are considered to be one of the effective ways to solve the problem of "white pollution", because they can be degraded...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L3/02C08L91/00C08K3/34C08K3/26C08K5/053C08K5/17C08K5/11C08K5/1539C08K13/02C08G63/688C08G63/78A41D31/14
Inventor 岳宇
Owner CHONGQING HETAI PLASTIC
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