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Copolymer material for laminating, and preparation method and application thereof

A copolymer and coating technology, which is applied in paper coating, special paper, textiles and papermaking, etc., can solve the problems of poor toughness and tensile resistance, high cost of PLA coating, limited application range, etc., and achieve stability Good, good thermal melt stability and hydrolytic stability, the effect of simple preparation process

Pending Publication Date: 2020-09-11
PUJING CHEM IND SHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

PLA can be decomposed naturally, and is non-toxic, which meets the requirements of green environmental protection. However, PLA is brittle, has poor toughness and tensile properties, and poor thermal stability, which greatly limits its application range, and the current PLA coating technology is not suitable for coating The thickness has certain requirements, not less than 22g / m 2 , causing the cost of PLA coating to be too high
Another biodegradable material, PBS (polybutylene succinate), has low processing temperature, low viscosity, and poor melt strength. Therefore, the application range of the two in the coating field is greatly limited.

Method used

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  • Copolymer material for laminating, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] The preparation method of the copolymer material for laminating, comprises the following steps:

[0052] (1) Preparation of polyglycolide

[0053] (1-1) Put glycolide and ring-opening catalyst in a prefabricated reactor and mix them evenly, and carry out pre-polymerization reaction at 80-160°C, and the reaction time does not exceed 120min; the ring-opening catalyst can be selected from rare earth elements, rare earth One or more of element oxides, metal magnesium compounds, alkali metal chelates, and organic guanidine catalysts, the amount of ring-opening catalyst added is 5%-0.01% of the glycolide mass, preferably 5%- 0.1%, more preferably 3%-1%;

[0054] (1-2) Put the material obtained in step (1-1) into the plug flow reactor, and carry out the polymerization reaction under the condition of 120-280 ℃, and the reaction time is 1 minute to 72 hours; wherein, the plug flow reactor The forms include but are not limited to static mixers, twin-screw units, horizontal disk...

Embodiment 1

[0096] Present embodiment is the preparation of polyglycolide, and the step of preparation method is:

[0097] (1) Glycolide and the ring-opening polymerization catalyst whose addition amount is 0.01 part of the quality of the glycolide added, dihydrate and tin dichloride are mixed uniformly in a prefabricated tank reactor at 120° C. for prepolymerization , the reaction time is 60min;

[0098] (2) Put the material of the prefabricated tank reactor into the polymerization reactor, and react at 200°C for 300min under the condition of 0.1MPa absolute pressure, wherein the polymerization reactor is a plug-flow reactor, specifically a static mixer;

[0099] (3) Put the material in the polymerization reactor into the devolatilization reactor, and at 220° C., the mixing speed is 200 RPM, the absolute pressure is 50 Pa, and the reaction time is 30 minutes to obtain polyglycolide.

Embodiment 2

[0101] This example uses the polyglycolide prepared in Example 1 to further prepare a polyglycolic acid composite material for coating products, that is, the copolymer material in the present invention.

[0102] Concrete preparation steps are:

[0103] The polyglycolide polymer that obtains in embodiment 1 and mass fraction are the antioxidant STAB PEP-36 of 0.03%, the metal passivator Chel-180 that mass fraction is 0.06% and the structural regulator ECN1299 (forma) of 0.5% Phenol-formaldehyde epoxy resin) was put into a twin-screw extruder for granulation, and the extrusion temperature was 250°C; the particles were dried at 120°C for 4 hours, put into an injection molding machine, the injection temperature was 250°C, the mold temperature was 100°C, and the injection molding into The splines were tested and the results are listed in Table 1.

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Abstract

The invention relates to a copolymer material for laminating, and a preparation method and application thereof. The copolymer material comprises one or more polymers with C-(Ax-By)n-D structures, wherein A is of a polyglycolide structure; the molecular structural formula of B is G-R1-W, and G and W are selected from one of -CO-NH-, -CO-R2-CO-OH, -CO-, -(CH2)2NH-CO-, -CH2-CH(OH)-CH2- or -NH; R1 isan aliphatic group, an aromatic group or a copolymerization structure formed by the aliphatic group or the aromatic group, and R2 is an alkyl group, an aryl group or an alkenyl group; x ranges from 1to 1500, y ranges from 1 to 1500, and n ranges from 1 to 10000; and C and D are end groups and are selected from one or more of a hydroxyl group, a carboxyl group, an amino group, an alkyl group, an aryl group, an ether group, an alkylene group and a halogenated alkyl group. The copolymer material has the advantages of excellent mechanical properties such as mechanical strength, toughness and thelike, degradability, good hydrolytic stability, high melting heat stability and the like.

Description

technical field [0001] The invention relates to a polyglycolic acid composite material, in particular to a copolymer material used for coating, and belongs to the technical field of polymer compounds. Background technique [0002] Paper food container packaging, containers, sanitary products, etc., in order to prevent liquid from soaking into the paper and improve durability, usually cover a layer of plastic film on the inner and outer surfaces to achieve waterproof and leak-proof effects. This technology is called spraying. membrane. Laminating film usually uses polyethylene (PE) or polypropylene (PP) as raw material, but because polyethylene (PE) and polypropylene (PP) are not biodegradable, a large amount of white garbage will be generated, which will pollute the environment. [0003] In order to solve the problem of pollution, a kind of coated paper covered with degradable plastic has been developed in the industry, and PLA (polylactic acid) is one of them. PLA can be ...

Claims

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Application Information

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IPC IPC(8): C08G63/08D21H19/28D21H27/00
CPCC08G63/08D21H19/28D21H27/00Y02W90/10
Inventor 张欣舟
Owner PUJING CHEM IND SHA
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