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St/BA Copolymerization-modified oxidized starch adhesive and preparation method thereof

A technology of oxidized starch and copolymerization modification, used in adhesives, graft polymer adhesives, adhesive types, etc., can solve the problems of high moisture absorption, unsatisfactory performance and low strength of oxidized starch adhesives. Conducive to grafting reaction, uniform viscosity and low moisture absorption

Inactive Publication Date: 2018-01-23
WUXI HAITE NEW MATERIAL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the unmodified oxidized starch adhesive has high moisture absorption rate and low strength, and its performance is not ideal

Method used

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  • St/BA Copolymerization-modified oxidized starch adhesive and preparation method thereof
  • St/BA Copolymerization-modified oxidized starch adhesive and preparation method thereof
  • St/BA Copolymerization-modified oxidized starch adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of St / BA copolymerization modified oxidized starch adhesive, by weight, is made by comprising following raw material:

[0029]

[0030] making process:

[0031] 1) Add 100g of oxidized starch, 0.6g of sodium dodecylbenzenesulfonate and 2.4g of hydrogen peroxide into 300g of water to dissolve and make starch latex, and heat to 80°C for gelatinization for 30min, and control the concentration of oxidized starch at 25wt%, Prepare gelatinized starch solution;

[0032] (2) Dissolving 0.35 g of sodium sulfite in 10 g of water to obtain a reducing agent aqueous solution, adding the reducing agent aqueous solution to the gelatinized starch solution prepared in (1), and keeping it warm for 15 minutes to obtain the gelatinized starch solution (2);

[0033] (3) 0.4g ammonium persulfate is added to dissolve in 10g water to obtain initiator aqueous solution;

[0034] (4) 10g styrene and 10g butyl acrylate are mixed uniformly to obtain a mixed monomer;

[0035] (5) Add 10...

Embodiment 2

[0039] A kind of St / BA copolymerization modified oxidized starch adhesive, by weight, is made by comprising following raw material:

[0040]

[0041] making process:

[0042] 1) Add 100g of oxidized starch, 0.8g of sodium dodecylbenzenesulfonate and 3.0g of hydrogen peroxide into 300g of water to dissolve and make starch latex, and heat to 80°C for gelatinization for 30min, and control the concentration of oxidized starch at 25wt%, Prepare gelatinized starch solution;

[0043] (2) dissolving 0.4 g of sodium sulfite in 10 g of water to obtain a reducing agent aqueous solution, adding the reducing agent aqueous solution into the gelatinized starch solution prepared in (1), and keeping it warm for 15 minutes to obtain the gelatinized starch solution (2);

[0044] (3) 0.6g ammonium persulfate is added to dissolve in 10g water to obtain initiator aqueous solution;

[0045] (4) 15g styrene and 30g butyl acrylate are mixed uniformly to obtain a mixed monomer;

[0046] (5) Add 5...

Embodiment 3

[0050] A kind of St / BA copolymerization modified oxidized starch adhesive, by weight, is made by comprising following raw material:

[0051]

[0052]

[0053] making process:

[0054] 1) Add 100g of oxidized starch, 1.0g of sodium dodecylbenzenesulfonate and 3.5g of hydrogen peroxide into 300g of water to dissolve and make starch latex, and heat to 80°C for gelatinization for 30min, and control the concentration of oxidized starch at 25wt%, Prepare gelatinized starch solution;

[0055] (2) Dissolving 0.5 g of sodium sulfite in 10 g of water to obtain a reducing agent aqueous solution, adding the reducing agent aqueous solution to the gelatinized starch solution prepared in (1), and keeping it warm for 15 minutes to obtain the gelatinized starch solution (2);

[0056] (3) 0.5g ammonium persulfate is added to dissolve in 10g water to obtain initiator aqueous solution;

[0057] (4) 20g styrene and 40g butyl acrylate are mixed uniformly to obtain mixed monomers;

[0058] ...

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Abstract

The invention discloses St / BA copolymerization-modified oxidized starch adhesive and a preparation method thereof. The St / BA copolymerization-modified oxidized starch adhesive is made from, by weight,100 parts of oxidized starch, 0.4-0.8 part of an initiator, 2.4-4.0 parts of an oxidant, 0.35-0.5 part of a reducing agent, 0.6-1 part of an anionic emulsifier, 5-10 parts of a thickener, 20-60 partsof a copolymer modifying monomer, 6-10 parts of a PH regulator, and 350 parts of water. The St / BA Copolymerization-modified oxidized starch adhesive of the invention has the advantages that, for instance, the adhesive has high adhesive strength, low moisture absorption rate, excellent waterproofness and excellent breaking strength, has good viscosity uniformity in gelatinized state and is good for grafting reaction, and the process is simple, free of VOC (volatile organic compound) emission and is good in safety and environmental friendliness.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a St / BA copolymerized modified oxidized starch adhesive and a preparation method thereof. Background technique [0002] Oxidized starch is an environmentally friendly natural adhesive raw material, which is widely used in many fields. However, the unmodified oxidized starch adhesive has high moisture absorption rate and low strength, and its performance is not ideal. Whether the oxidized starch can be modified to improve the properties of adhesive raw materials is the subject of current research. Contents of the invention [0003] Based on the current situation in the above-mentioned prior art, the inventors have found through research that the excellent performance of styrene and butyl acrylate itself, the performance of oxidized starch glue modified by its copolymerization can be improved without adding crosslinking agent and high temperature drying conditions. get promoted. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/02C08F251/00C08F220/18C08F212/08C08F2/26C08B31/18
Inventor 李卫东卫晓波吴立波黄馨曹英杰李小静白永平李晶波殷晓芬
Owner WUXI HAITE NEW MATERIAL RES INST
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