Modified polyvinyl-alcohol binding agent

A polyvinyl alcohol and adhesive technology, applied in the directions of graft polymer adhesives, adhesive types, adhesives, etc., can solve problems such as poor applicability, impact on composite strength, and poor applicator performance.

Active Publication Date: 2016-08-24
柳宇轩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, polyvinyl alcohol aqueous solution is non-toxic, odorless, very convenient to prepare, store, and use, and can bond wood, paper, and some fabrics, and is a widely used bonding material; as an adhesive, it The shortcomings are also very obvious, such as too good hydrophilicity, poor adhesion to materials with strong hydrophobicity, and its poor fit. When it is applied to fabrics with developed hairiness and loose structure, it is easy to be The hairiness bounces off, and the proper composite strength cannot be achieved, especially when it is heated and cured, its dehydration speed is slow, the viscosity drops quickly, and the application performance becomes poor, which seriously affects the composite strength and cannot be used at all.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 665g of water and 150g of polyvinyl alcohol PVA-2488 into the reaction kettle, stir at room temperature for 35 minutes, raise the temperature to 90°C, stir and dissolve for 2 hours, cool down to 75°C, add 2g of emulsifier CO-436, and stir until uniform. Weigh 1.5 g of ammonium persulfate into 80 g of water, stir until dissolved, then add 2 g of sodium bicarbonate, stir until dissolved to obtain an initiator solution. Add 20 g of vinyl acetate and 75 g of butyl acrylate into the dropping funnel, and mix naturally to obtain comonomer. Adjust the material in the reactor to 78°C, add 1 / 4 of the initiator solution, and evenly add the comonomer dropwise. After 3.5 hours, the dropwise addition is completed, and the timing starts from the drop of the comonomer. Add the total amount of the initiator solution every 1 hour. 1 / 8 of the amount, after adding the comonomer, keep it warm at 80°C for 30 minutes, then add the remaining 5g of vinyl acetate dropwise, after 20 minutes, ...

Embodiment 2

[0016] In test conditions, butyl acrylate was increased to 90g, water was reduced by 15g, and all the other were the same as in Example 1.

Embodiment 3

[0018] In the test conditions, PVA2688 was used for polyvinyl alcohol, the dosage was reduced to 140g, vinyl acetate and butyl acrylate were increased by 5g respectively, and the rest were the same as in Example 1.

[0019] To the product of embodiment 1,2,3, detected the peeling strength after viscosity and fabric composite, result is as follows:

[0020] sample

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PUM

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Abstract

The invention relates to a modified polyvinyl-alcohol binding agent. The modified polyvinyl-alcohol binding agent is formed in the mode that high-polymerization-degree polyvinyl alcohol is dissolved, subjected to monomer binding and polymerized. The modified polyvinyl-alcohol binding agent has the advantages of being high in viscosity, good in attaching performance, excellent in water resistance, simple in synthetic technology and the like, and can be widely used for fabric compounding, wood and fabric binding.

Description

technical field [0001] The invention belongs to the field of polymer materials and relates to a modified polyvinyl alcohol adhesive. Background technique [0002] As we all know, polyvinyl alcohol aqueous solution is non-toxic, odorless, very convenient to prepare, store, and use, and can bond wood, paper, and some fabrics, and is a widely used bonding material; as an adhesive, it The shortcomings are also very obvious, such as too good hydrophilicity, poor adhesion to materials with strong hydrophobicity, and its poor fit. When it is applied to fabrics with developed hairiness and loose structure, it is easy to be The hairiness bounces off, and the proper composite strength cannot be achieved. Especially when it is heated and cured, its dehydration speed is slow, the viscosity drops rapidly, and the application performance becomes poor, which seriously affects the composite strength and cannot be used at all. Contents of the invention [0003] Aiming at the problems of p...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C09J151/00C08F261/04C08F218/08C08F220/18
CPCC08F261/04C09J151/003C08F220/1804
Inventor柳宇轩
Owner柳宇轩