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Redispersible acrylate hot melt adhesive for paper products and preparation method thereof

A technology of acrylate and methyl methacrylate, which is applied in the field of redispersible acrylate hot melt adhesive for paper products and its preparation, can solve the problem of low cohesive strength of starch adhesive, quality problems of recycled paper products, and deposits remaining in the machine. Moderate problem, to achieve the effect of not easy to oxidize and decompose, improve efficiency and save energy consumption

Active Publication Date: 2022-03-29
TIANJIN DEAOSAIEN BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In solving the problem of adhesive substances in waste paper recycling, water-soluble and redispersible adhesives are the most researched. European and American countries have stipulated a standard for "repulpable" pressure-sensitive adhesives. This "repulpable" pressure-sensitive adhesive "Pressure-sensitive adhesives are divided into "water-soluble" and "redispersible" pressure-sensitive adhesives, which can be dissolved in water or dispersed in water in the form of tiny particles in the waste paper recycling process to achieve the purpose of removing adhesives in paper product recycling; secondly It is a product with high hydrophobicity and sufficient cohesive strength. It is not easy to break down during pulping and can be removed by filtration and screening, but it may cause damage to production due to incomplete treatment; the third is to make adhesives and waste paper exist relatively Large density difference, thus cleared by centrifugation, higher operating costs
[0004] At present, the adhesives used for bonding paper products mainly include starch glue, EVA, white latex (polyacrylate, polyvinyl alcohol), etc. Starch adhesives have low cohesive strength and are not suitable for some packaging boxes that need to bear loads. , while other types of colloids are difficult to remove in the process of waste paper recycling, they are more viscous, and are easy to deposit and remain in the machine, damaging the machine, and may cause quality problems of recycled paper products

Method used

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  • Redispersible acrylate hot melt adhesive for paper products and preparation method thereof
  • Redispersible acrylate hot melt adhesive for paper products and preparation method thereof
  • Redispersible acrylate hot melt adhesive for paper products and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A kind of redispersible acrylate hot melt adhesive for paper products, its preparation steps are as follows:

[0030] (1) prepare paraffin-modified acrylate polymer:

[0031] S1. Put 25 parts of sliced ​​paraffin and 5 parts of compound emulsifier A in a reaction vessel, and raise the temperature to 75°C. After the paraffin is completely melted, start stirring. After stirring evenly, add 70 parts of isothermal emulsifier A dropwise to it within 20 minutes. Deionized water, continue to insulate and stir for 40min, obtain paraffin wax emulsion after cooling; Wherein, emulsifier A is the composite emulsifier of alkylphenol polyoxyethylene ether-10 and Span 80 by weight ratio of 11:9;

[0032] S2. Mix and stir 35 parts of deionized water, 0.4 parts of composite emulsifier B and 0.1 part of sodium bicarbonate for 10 to 15 minutes to obtain a mixed solution; wherein, emulsifier B is an alkyl group with a weight ratio of 3.5:1 Compound emulsifier formed by mixing phenol polyo...

Embodiment 2

[0039] A kind of redispersible acrylate hot melt adhesive for paper products, its preparation steps are as follows:

[0040] (1) prepare paraffin-modified acrylate polymer:

[0041] S1. Put 20 parts of sliced ​​paraffin and 5 parts of compound emulsifier A in a reaction container, and raise the temperature to 75°C. After the paraffin is completely melted, start stirring. After stirring evenly, add 75 parts of isothermal emulsifier A dropwise to it within 20 minutes. Deionized water, continue to insulate and stir for 40min, obtain paraffin wax emulsion after cooling; Wherein, emulsifier A is the composite emulsifier of alkylphenol polyoxyethylene ether-10 and Span 80 by weight ratio of 11:9;

[0042] S2. Mix and stir 37 parts of deionized water, 0.6 parts of composite emulsifier B and 0.2 parts of sodium bicarbonate for 10 to 15 minutes to obtain a mixed solution; wherein, emulsifier B is an alkyl group with a weight ratio of 3.5:1 Compound emulsifier formed by mixing phenol pol...

Embodiment 3

[0049] A kind of redispersible acrylate hot melt adhesive for paper products, its preparation steps are as follows:

[0050] (1) prepare paraffin-modified acrylate polymer:

[0051] S1. Put 15 parts of sliced ​​paraffin and 5 parts of compound emulsifier A in a reaction container, and raise the temperature to 75°C. After the paraffin is completely melted, start stirring. After stirring evenly, add 70 parts of isothermal emulsifier A to it dropwise within 20 minutes. Deionized water, continue to insulate and stir for 40min, obtain paraffin wax emulsion after cooling; Wherein, emulsifier A is the composite emulsifier of alkylphenol polyoxyethylene ether-10 and Span 80 by weight ratio of 8:9;

[0052] S2. Mix and stir 39 parts of deionized water, 0.8 parts of composite emulsifier B and 0.3 parts of sodium bicarbonate for 10 to 15 minutes to obtain a mixed solution; wherein, emulsifier B is an alkyl group with a weight ratio of 3:1 Compound emulsifier formed by mixing phenol poly...

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Abstract

The invention discloses a redispersible acrylate hot-melt adhesive for paper products and a preparation method thereof. The hot-melt adhesive is prepared by adding 79-93 parts by weight of paraffin-modified acrylate polymer, 1-15 parts by weight of ortho Dioctyl phthalate and 1 to 12 parts by weight of rosin are uniformly melted and mixed; wherein, the paraffin-modified acrylate polymer is made of methyl methacrylate, methyl methacrylate, lauryl methacrylate , vinyl acetate and acrylic acid are copolymerized in paraffin emulsion; the hot melt adhesive can be redispersed in water in the form of tiny particles in the waste paper recycling process, which is easy to remove and does not damage the quality of the machine and recycled paper; its use The melting temperature is between 73-86°C, and the thermal decomposition temperature is between 367-377°C, meeting the requirements of low-temperature hot-melt adhesives. The operating temperature range is wide, and almost no formaldehyde gas is generated, and hot-melt adhesive peeling and carbon deposition do not occur. And aging phenomena such as oxidative decomposition.

Description

technical field [0001] The invention relates to the technical field of hot melt adhesives, in particular to a redispersible acrylate hot melt adhesive for paper products and a preparation method thereof. Background technique [0002] At present, the annual consumption of paper products in my country is reported to be up to 35 million tons. The abundant waste paper resources have created a waste paper market in my country, and the rational reuse of waste paper has become a difficult problem in the process of environmental protection in my country. In the process of recycling paper products, the original impurities must be removed to ensure the smooth progress of waste paper repulping. Removing adhesive substances is the primary solution in the waste paper recycling process. The adhesive substances in waste paper are mainly various pressure-sensitive adhesives, hot-melt adhesives, waxes, and coating adhesives. These substances are in the waste paper recycling process. It may ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/12C09J11/06C09J11/08C08F220/14C08F220/18C08F218/08C08F220/06
CPCC09J133/064C09J11/06C09J11/08C08F220/14C08L2205/03C08L91/06C08L93/04C08K5/12C08F220/1812C08F218/08C08F220/06
Inventor 郭敏杰刘兴之郭维礼
Owner TIANJIN DEAOSAIEN BIOTECH CO LTD
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