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A kind of biodegradable adhesive and its preparation method and application

A biodegradable and adhesive technology, applied in adhesives and other directions, can solve the problems of not specifying the relative molecular weight of polyester adhesives, biodegradation rate, high cost, rare adhesives, etc., to avoid excessive volatile harmful gases, high efficiency, The effect of simple processing technology

Active Publication Date: 2020-07-28
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the patent is described as biodegradable, it does not specify the relative molecular weight and biodegradation rate of the synthetic polyester adhesive, and the prepared adhesive is still mainly diluted with organic solvents
In addition, according to the synthesis process analysis, its cost is very high
[0004] In general, the development of adhesives that are simple to produce, easy to handle, low cost, biodegradable, and use aqueous diluents is still rare

Method used

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  • A kind of biodegradable adhesive and its preparation method and application
  • A kind of biodegradable adhesive and its preparation method and application
  • A kind of biodegradable adhesive and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0024] (1) PHA lye chemical degradation product preparation in the embodiment

[0025] Add NaOH solution to the four reactors respectively, and then add PHA powder in the proportion of 5% of the mass of the alkali solution, control the temperature at 60° C., and the stirring speed at 150 r / min. The reactants were taken out at 3h, 6h, 9h, and 15h respectively, and dried in an oven.

[0026] (2) PHA lye chemical degradation product performance characterization in the embodiment

[0027] ① Fourier infrared spectroscopy test

[0028] KBr powder is mixed, ground and pressed into thin slices, with a scanning range of 400cm -1 ~4000cm -1 , resolution 4cm -1 , scan frequency 32. PHA alkaline chemical degradation products at 3400cm -1 A significantly increased absorption peak (the characteristic-OH peak of the alkali chemical degradation product of PHA) appears at , while the PHA before degradation is at 3400cm -1 The small absorption peak indicates that PHA undergoes alkaline c...

example 5～8

[0034] Dilute the PHA alkali chemical degradation product obtained in Example 4 with distilled water to control the pH value of the final solution at 6-9 to obtain a biodegradable adhesive. According to the solid content of the solution, take a quantitative solution and apply it evenly on the kraft paper with a scraper, put it in an oven and dry it for 10 minutes to obtain a glue content of 12mg / cm 2 pressure sensitive tape. Among them, the initial adhesion test adopts the inclined surface rolling ball method in the national standard GB / T4852-2002 (inclination angle of 30°, the length of the sample is more than 250mm, and the width is 10-80mm), and the maximum size of the steel ball that can be adhered to the viscous surface of the specified length is detected. The holding force test adopts the test method of the adhesive tape to the standard test steel plate in the national standard GB / T4851-2014 (the length of the sample is 150mm, and the width is 12±0.5mm), and the adhesive...

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Abstract

The invention relates to a biodegradable adhesive material prepared by using a chemical degradation product of a polyhydroxyalkanoate (PHA) alkali liquor and belongs to the field of adhesives. The method comprises the steps of firstly pouring a PHA material into a reaction container with an alkali solution at the ratio of 5-30% of the mass of the alkali solution, wherein a reactor has stirring and temperature control functions; controlling the reactor at a certain reaction temperature while stirring, stopping stirring after reacting for a period of time and obtaining a PHA alkaline chemical degradation product; and diluting the PHA alkaline chemical degradation product by using distilled water to obtain the biodegradable adhesive. The adhesive is a water-soluble adhesive, has the characteristics of being simple in preparation, controllable in relative molecular weight and viscosity and biodegradable, can be applied to the fields of adhesive tape, leather, sticker, stationery, office, electrons and automotive trim fixation, footwear industry and handmade jewelry pasting and fixation.

Description

technical field [0001] This technology relates to a biodegradable adhesive material prepared by using the chemical degradation product of polyhydroxyalkanoate (PHA) lye, which can be used in tapes, leather, stickers, stationery, office, electronics, automotive trim fixing, shoe industry , Paste and fix handmade jewelry, etc. Background technique [0002] In recent years, the industry of adhesives has developed extremely rapidly and the scope of application has been broadened day by day, and they have played an extremely important role in various industries. However, due to the fact that traditional adhesives are difficult to degrade in the natural environment, after being applied to plastics, leather, paper and other products, these products enter the environment after they are discarded, causing "pollution" due to the inability to degrade, and have become a must for natural environment protection. Major hidden dangers, solving this problem has gradually become the focus of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J167/04
CPCC09J167/04
Inventor 翁云宣张明慧李云
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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