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Biodegradable pressure-sensitive adhesive and preparation method thereof

A technology for pressure-sensitive adhesives and biodegradation, applied in the direction of adhesives, pressure-sensitive films/sheets, grafted polymer adhesives, etc., can solve problems such as poor economy, achieve low cost, simple and easy preparation method, The effect of excellent adhesive performance

Active Publication Date: 2018-07-06
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

However, the adhesive performance of the adhesive synthesized by this method needs to be improved, and at the same time, the economic efficiency is poor.

Method used

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  • Biodegradable pressure-sensitive adhesive and preparation method thereof

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preparation example Construction

[0031] The invention provides a method for preparing a biodegradable pressure-sensitive adhesive, comprising:

[0032] A) under the action of a catalyst, the material a is reacted with the material b to obtain a polyester copolymer containing unsaturated double bonds;

[0033] Material a is selected from aliphatic alkyds and / or aliphatic lactones;

[0034] Material b is selected from unsaturated dibasic carboxylic acids or unsaturated dibasic acid anhydrides;

[0035] B) Under the action of an initiator, the polyester copolymer containing unsaturated double bonds and vinyl monomers are subjected to a free radical polymerization reaction to obtain a biodegradable pressure-sensitive adhesive.

[0036] In the present invention, the catalyst preferably includes one or more of acetate, tin compound, titanium compound and antimony compound. The acetate preferably includes one or more of zinc acetate, magnesium acetate, manganese acetate, cobalt acetate and calcium acetate. The ti...

Embodiment 1

[0063] Under nitrogen protection, 160g (1.65mol) of lactic acid with a mass concentration of 93%, 13g (0.1mol) of itaconic acid and 0.1g of stannous octoate were added to the reactor, and the oil bath was heated to 130°C for 2 hours, and then the temperature was raised React at 160°C for 2h, then raise the temperature to 180°C for 2h. The water generated during the reaction was continuously distilled off, and then the temperature was lowered to room temperature to obtain lactic acid oligomers containing unsaturated bonds. Afterwards, under nitrogen protection, 5.2g (0.05mol) styrene, 6.4g (0.05mol) butyl acrylate, 0.8g (0.0056mol) glycidyl methacrylate and 0.3g (0.0018mol) AIBN were added to the reactor , the temperature of the oil bath was raised to 65° C. for free radical polymerization, and the reaction time was 20 h. After the reaction, the biodegradable adhesive is obtained.

Embodiment 2

[0065] Under the protection of nitrogen, 160g (1.65mol) of lactic acid with a mass concentration of 93%, 12g (0.1mol) of maleic acid and 0.1g of stannous octoate were added to the reactor, and the oil bath was heated to 130°C for 2 hours, and then the temperature was raised Reaction at 180°C for 4h. The water generated during the reaction was continuously distilled off, and then the temperature was lowered to room temperature to obtain lactic acid oligomers containing unsaturated bonds. Afterwards, under nitrogen protection, 6g (0.058mol) styrene, 12g (0.065mol) isooctyl acrylate, 0.8g (0.0056mol) glycidyl methacrylate and 0.3g (0.0018mol) AIBN were added to the reactor , the temperature of the oil bath was raised to 65° C. for radical polymerization, and the reaction time was 20 h. After the reaction, the biodegradable adhesive is obtained.

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Abstract

The invention provides a preparation method of a biodegradable pressure-sensitive adhesive, wherein the obtained biodegradable pressure-sensitive adhesive has good biodegradability, excellent adhesiveproperty and relatively high synthesis efficiency; in addition, the preparation method provided by the invention is simple and easy to operate and relatively low in cost, and provides a technical basis for large-scale production. Experimental results show that the biodegradable pressure-sensitive adhesive prepared by the invention is prepared by using a biaxially stretched polylactic acid film asa substrate to prepare a biodegradable tape, wherein the prepared biodegradable tape has a relative biodegradation rate of greater than or equal to 91%, an adhesion holding force of greater than or equal to 24 h, and a 180 DEG peeling strength of greater than or equal to 3.5 (N / cm).

Description

technical field [0001] The invention relates to the technical field of pressure-sensitive adhesives, in particular to a biodegradable pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Pressure-sensitive adhesive is an adhesive that is sensitive to pressure during the bonding process, and can form a firm bond under a small pressure. There are many types of pressure-sensitive adhesives. At present, there are mainly rubber pressure-sensitive adhesives, thermoplastic elastomer pressure-sensitive adhesives, silicone pressure-sensitive adhesives, polyurethane pressure-sensitive adhesives and acrylate pressure-sensitive adhesives. However, due to their special chemical structure and characteristics, these pressure-sensitive adhesives are difficult to degrade in the natural environment, so their long-term retention in the environment has become a major hidden danger and threat in modern society. [0003] In recent years, with the improvemen...

Claims

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Application Information

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IPC IPC(8): C08F283/02C08F220/32C08F212/08C08F220/18C08F220/20C09J151/08C09J7/38
CPCC09J151/08C08F283/02C08F220/1808C08F220/325C08F220/1804
Inventor 白云刚张贵宝董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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