Grafted modified oxidized starch adhesive and preparation method thereof

A technology of oxidized starch and graft modification, which is applied in the direction of graft polymer adhesives, adhesives, adhesive types, etc., can solve the problems of unsatisfactory performance, high moisture absorption rate and low strength of oxidized starch adhesives, Achieve the effect of favorable grafting reaction, low moisture absorption rate and excellent water resistance

Active Publication Date: 2017-10-24
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

Method used

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  • Grafted modified oxidized starch adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] A N-hydroxyethyl acrylamide graft modified oxidized starch adhesive, prepared from the following raw materials:

[0024] Oxidized starch 100g

[0025] Potassium persulfate 0.4 g

[0026] Sodium nonylphenol polyoxyethylene sulfonate 0.8 g

[0027] Polyoxyethylene nonylphenol ether 0.8 g

[0028] Polyvinyl alcohol 1799 1 g

[0029] N-hydroxyethyl acrylamide 30 g

[0030] Urea 8 g

[0031] Water 385 g

[0032] Preparation Process:

[0033] (1) Add 100g of oxidized starch, 1g of polyvinyl alcohol 1799, 0.8g of sodium nonylphenol polyoxyethylene sulfonate and 0.8g of nonylphenol polyoxyethylene ether into 300g of water to dissolve the starch latex and heat it to 90 Gelatinize at ℃ for 30 minutes, and control the concentration of oxidized starch at 25wt% to prepare a gelatinized starch solution.

[0034] (2) Cool down to 85°C, add 0.4 g of potassium persulfate to 10 g of water to dissolve, add the initiator aqueous solution to (1) to obtain an aqueous solution, and keep it...

Example Embodiment

[0037] Example 2

[0038] A N-hydroxyethyl acrylamide graft modified oxidized starch adhesive, prepared from the following raw materials:

[0039] Oxidized starch 100 g

[0040] Potassium persulfate 0.8 g

[0041] Sodium nonylphenol polyoxyethylene sulfonate 0.5 g

[0042] Polyoxyethylene nonylphenol ether 0.5 g

[0043] Polyvinyl alcohol 1799 1.5 g

[0044] N-hydroxyethyl acrylamide 50 g

[0045] Urea 12 g

[0046] Water 385 g

[0047] Preparation Process:

[0048] (1) Add 100g of oxidized starch, 1.5g of polyvinyl alcohol 1799, 0.5g of sodium nonylphenol polyoxyethylene sulfonate and 0.5g of nonylphenol polyoxyethylene ether into 300g of water to dissolve and prepare starch latex, and heat to Gelatinize at 90°C for 30 minutes, and control the concentration of oxidized starch at 25wt% to prepare a gelatinized starch solution.

[0049] (2) Lower the temperature to 85°C, add 0.8 g of potassium persulfate to 10 g of water to dissolve, add the initiator aqueous solution to (1) to prepare an aque...

Example Embodiment

[0052] Example 3

[0053] A N-hydroxyethyl acrylamide graft modified oxidized starch adhesive, prepared from the following raw materials:

[0054] Oxidized starch 100 g

[0055] Potassium persulfate 0.6 g

[0056] Sodium nonylphenol polyoxyethylene sulfonate 0.7 g

[0057] Polyoxyethylene nonylphenol ether 1.2 g

[0058] Polyvinyl alcohol 1799 2 g

[0059] N-hydroxyethyl acrylamide 40 g

[0060] Urea 10 g

[0061] Water 385 g

[0062] Preparation Process:

[0063] (1) Add 100g of oxidized starch, 2g of polyvinyl alcohol 1799, 0.7g of sodium nonylphenol polyoxyethylene sulfonate and 1.2g of nonylphenol polyoxyethylene ether into 300g of water to dissolve and prepare starch latex, and heat to 90 Gelatinize at ℃ for 30 minutes, and control the concentration of oxidized starch at 25wt% to prepare a gelatinized starch solution.

[0064] (2) Cool down to 85°C, add 0.6 g of potassium persulfate to 10 g of water to dissolve, add the initiator aqueous solution to (1) to prepare an aqueous solution, an...

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PUM

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Abstract

The invention discloses grafted modified oxidized starch adhesive and a preparation method thereof. The grafted modified oxidized starch adhesive is prepared from the following components in parts by weight: 100 parts of oxidized starch, 0.4-0.8 part of initiator, 0.5-0.8 part of anionic emulsifier, 0.5-1.2 parts of nonionic emulsifier, 1-3 parts of a thickening agent, 30-50 parts of reactive grafted modified monomer, 8-12 parts of pH value regulator and 385 parts of water. The grafted modified oxidized starch adhesive has the characteristics of high adhesion strength, low moisture absorption rate, excellent moisture resistance, uniform starch pasting liquid viscosity, benefit for grafting reaction, simple process, zero VOC emission, safety, environment friendliness and the like.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a graft 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. On the other hand, the N-hydroxyethyl group is a self-crosslinkable reactive monomer, and its own double bond can undergo graft polymerization with free radicals; after the water volatilizes, the N-hydroxyethyl group can generate Self-crosslinking reaction to obtain very good strength, water resistance, and scrub resistance. Whether N-hydroxyethyl groups can be introduced into the modification of oxidized s...

Claims

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Application Information

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IPC IPC(8): C09J151/02C08F251/00C08F220/58C08F2/30C08F2/26
CPCC08F2/26C08F2/30C08F251/00C09J151/02C08F220/58
Inventor 李卫东吴立波黄馨曹英杰李晶波白永平卫晓波董志强
Owner WUXI HAITE NEW MATERIAL RES INST
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