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Preparation method of biodegradable material based on dual-curing system and application of biodegradable film material of biodegradable material

A biodegradable material and biodegradable film technology, applied in the field of biodegradable film material application and biodegradable material preparation, can solve the problem of incomplete ultraviolet light irradiation of the coating film, achieve excellent stability, avoid separation and uncured, low temperature rapid curing sexual effect

Pending Publication Date: 2022-07-01
东莞全球环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the traditional UV curing process is used for objects with three-dimensional complex shapes and thicker films, there is a shortcoming of incomplete UV irradiation of the coating film, which limits the application of UV-curable lactic acid ester resins to a certain extent; This problem does not exist in the reaction between isocyanate and hydroxyl polyaddition or double bond crosslinking reaction

Method used

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  • Preparation method of biodegradable material based on dual-curing system and application of biodegradable film material of biodegradable material
  • Preparation method of biodegradable material based on dual-curing system and application of biodegradable film material of biodegradable material
  • Preparation method of biodegradable material based on dual-curing system and application of biodegradable film material of biodegradable material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Firstly, polylactic acid prepolymer was prepared, 30mol lactic acid was added to the reaction kettle, water was removed by vacuuming at 80°C, and the system pressure was controlled to react for 2h under the condition of 35KPa;

[0048] Then add 20mol ethylene glycol and 0.05equiv DCC, heat up to 120°C, control the system pressure at 5KPa, react for 3h, and prepare polylactic acid prepolymer with hydroxyl groups at both ends by melt condensation method.

[0049] Next, a resin material was prepared, using the following components: 70 parts of a light-cured polylactic acid prepolymer, 30 parts of a heat-cured polylactic acid prepolymer, 1 part of 2-methyl-1-(4-methylthiophenyl)- 2-Moline-1-propanone, 1 part dimethyl azobisisobutyrate, 0.5 UV absorber.

Embodiment 2-6

[0051]Different from Example 1 are the light-cured polylactic acid prepolymer, heat-cured polylactic acid prepolymer, 2-methyl-1-(4-methylthiophenyl)-2-morpholin-1-propanone, The addition amount of dimethyl azodiisobutyrate and UV absorber is different.

[0052] The specific number of additions is shown in Table 1:

[0053]

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Abstract

The invention discloses a preparation method of a biodegradable material based on a dual-curing system and application of a biodegradable film material, and belongs to the technical field of polymer films. Firstly, an aliphatic hydroxy acid monomer is subjected to melt copolymerization to prepare a hydroxyl-terminated prepolymer; adding a photoinitiator into the hydroxyl-terminated prepolymer for modification to obtain a light-cured aliphatic polyester oligomer; adding a thermal initiator for modification to obtain a thermocuring aliphatic polyester oligomer; mixing the oligomers, and adding an auxiliary agent to obtain a resin material; granulating the obtained resin material to obtain injection molding master batch; and carrying out blow molding by using the prepared injection molding master batch to prepare a biodegradable film material finished product. The film material can be quickly decomposed, is high in biodegradation rate, is prepared by adopting a light curing and heat curing combined dual-curing system, has low-temperature quick curing property and excellent stability in the film processing process, can avoid the problem of separation and non-curing in the processing process, and improves the finished product quality of the biodegradable film.

Description

technical field [0001] The invention belongs to the technical field of polymer films, and in particular relates to a method for preparing a biodegradable material based on a dual-curing system and the application of the biodegradable film material. Background technique [0002] The degradable film not only has the functions and characteristics of traditional plastics, but also can be split and degraded in the natural environment through the action of microorganisms in soil and water or through the action of ultraviolet rays in sunlight after reaching the service life, and finally re-enter the ecology in a reduced form. In the environment, back to nature. The varieties developed in China have covered photodegradation, photobiodegradation, photooxidative biodegradation, high starch content biodegradation, high calcium carbonate filled photooxidative degradation, and total biodegradation. [0003] With the increasing application of polymer films, the market demand for high-per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L67/04
CPCC08J5/18C08J2367/04C08J2467/04
Inventor 阳春蓝小平舒利英
Owner 东莞全球环保科技有限公司
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