阅读说明：本技术 一种环保型水性胶黏剂 (Environment-friendly water-based adhesive ) 是由 方昱炜 李兆顺 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种环保型水性胶黏剂。本申请选用改性乳胶和改性APAO乳液作为胶黏剂主要成分,协同添加粉末颗粒骨架料和增稠剂制作胶黏剂,该胶黏剂粘性好,无污染、无voc排放,使用后无残留,便于清洁,对环境无不利影响,环保高效。(The invention discloses an environment-friendly water-based adhesive. Modified latex and modified APAO emulsion are selected as gluing agent main component for this application, and powder granule skeleton material and thickener preparation gluing agent are added in coordination, and this gluing agent viscidity is good, and pollution-free, no voc discharges, and the back of using does not have the residue, and is convenient for clean, does not have adverse effect to the environment, environmental protection high efficiency.)

1. The environment-friendly water-based adhesive is characterized by comprising the following components in parts by weight:

30-95 parts of modified latex, 5-50 parts of modified APAO emulsion, 3-5 parts of powder particle skeleton material and 0.5-2 parts of thickening agent;

the modified APAO emulsion is APAO emulsion grafted with methyl methacrylate;

the modified latex is modified by using an initiator and an acrylate monomer.

2. The environment-friendly aqueous adhesive according to claim 1, wherein the preparation method of the modified latex comprises the following steps:

(1) cleaning a glass container by using an anionic emulsifier, and controlling the temperature in the container to be 60-75 ℃;

(2) adding deionized water into AEO-9 to prepare an AEO-9 soap solution with the concentration of 5-10%;

(3) adding latex and the AEO-9 soap solution obtained in the step (2) into the glass container in the step (1), wherein the addition amount of the soap solution is 5% of that of the latex, stirring gently to avoid demulsification, adding ferric trichloride, and adding dropwise to obtain a mixture A;

(4) and (2) dripping an initiator and an acrylate monomer into the mixture A at the same time, wherein the total addition amount of the acrylate monomer is 1-2% of the solid content of the latex, and the total addition amount of the initiator is 1-5% of the total amount of the latex, slowly dripping, heating to 80-82 ℃, stirring for 25-30min, cooling to room temperature, and filtering to obtain the modified latex.

3. The environment-friendly aqueous adhesive according to claim 2, wherein the latex in the step (2) is one of neoprene latex, styrene-butadiene latex, natural latex and nitrile-butadiene latex.

4. The environment-friendly aqueous adhesive as claimed in claim 2, wherein the amount of ferric chloride added in step (3) is 0.08-0.1% of the solid content of the latex.

5. The environment-friendly aqueous adhesive according to claim 2, wherein the AEO-9 soap solution prepared in the step (2) is pre-emulsified before the initiator and the acrylate monomer are added in the step (4), and when the AEO-9 soap solution and the acrylate monomer or the initiator are pre-emulsified, the mass ratio of the AEO-9 soap solution to the acrylate monomer or the initiator is 2-3: 1.

6. The environment-friendly aqueous adhesive according to claim 2, wherein the initiator in the step (4) is one of hydrogen peroxide, tert-butyl hydroperoxide and dicumyl peroxide; the acrylic monomer is one of methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, methyl methacrylate, ethyl methacrylate and butyl methacrylate.

7. The environment-friendly aqueous adhesive as claimed in claim 1, wherein the thickener is one or more of carboxymethyl cellulose, sodium alginate and polyvinyl alcohol.

8. The environment-friendly aqueous adhesive as claimed in claim 1, wherein the powder particle aggregate is one of zinc oxide, calcium carbonate, diatomite, montmorillonite and zinc oxide ultrafine powder.

9. Use of the environmentally friendly aqueous adhesive according to any one of claims 1 to 8 in home decoration and automotive industry.

Technical Field

The invention relates to an environment-friendly water-based adhesive, and belongs to the field of building material adhesives.

Background

The adhesive is generally applied to various daily lives, such as a carpet sticking in the north american market, the latex is coated on a cement floor, and then the carpet is laid, and after several hours, the carpet is fixed on the cement floor; or posters of the campaign are pasted to the wall; or the use of adhesives on indoor floor pastes and wallpaper. However, when the articles are replaced, the situation of adhesive residue is inevitable, and the residual traces must be removed for the next better pasting, so that the removal of the residual traces by using a solvent, a fire attack, an angle grinder and a steel wire brush is time-consuming, labor-consuming and possibly cannot be completely removed; in addition, the sticking degree of many adhesives is not ideal, which usually causes the carpet or wallpaper to tilt, not only affects daily life, but also may cause falling injury; in addition, nowadays, people pay more and more attention to health, the environmental protection property of the adhesive is also the key focus of people when purchasing adhesive products.

The adhesives used for bonding soft materials at present are mainly oily adhesives, hot melt adhesives, water-based pressure-sensitive adhesives or water-based polyurethane adhesives, but the four adhesives have defects in the using process. The oily glue has a strong smell and is not environment-friendly, and if the solvent can not be volatilized out, the soft PVC foaming material is easy to corrode inside. The glue spreader of the hot melt adhesive has certain limitation on the thickness of construction materials, more glue materials are wasted when the machine is cleaned, and the bonding strength is not high when the hot melt adhesive is used for sticking soft PVC foaming materials. The water-based pressure-sensitive adhesive has strong initial adhesion, but insufficient holding power and slow drying speed. The common aqueous polyurethane glue has good initial adhesion and lasting adhesion, but generally has low solid content, thinner glue and slow drying speed.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides the environment-friendly water-based adhesive. The modified latex and the modified APAO latex are selected as main components of the adhesive, and the prepared adhesive is good in viscosity, free of pollution and voc emission, free of residue after use and convenient to clean.

The environment-friendly water-based adhesive comprises the following components in parts by weight:

30-95 parts of modified latex, 5-50 parts of modified APAO emulsion, 3-5 parts of powder particle skeleton material and 0.5-2 parts of thickening agent;

the modified latex is modified by using an initiator and an acrylate monomer.

The modified APAO emulsion is APAO emulsion grafted with methyl methacrylate, and the preparation method is prepared according to the patent with the application number of 201810946995.9 and the name of the emulsification method of the amorphous α -olefin copolymer.

Further, the preparation method of the modified latex comprises the following steps:

(1) cleaning a glass container by using an anionic emulsifier, and controlling the temperature in the container to be 60-75 ℃;

(2) adding deionized water into AEO-9 to prepare an AEO-9 soap solution with the concentration of 5-10%;

(3) adding all latex and the AEO-9 soap solution obtained in the step (2) into the glass container in the step (1), wherein the addition amount of the soap solution is about 5% of that of the latex, stirring gently to avoid demulsification, adding ferric trichloride, and adding dropwise to obtain a mixture A;

(4) dropping an initiator and an acrylate monomer into the mixture A at the same time, wherein the total addition amount of the acrylate monomer is 1-2% of the solid content of the latex, the total addition amount of the initiator is 1-5% of the total amount of the latex, slowly dropping, completing the dropping within 4h, heating to 80-82 ℃, stirring for 25-30min, cooling to room temperature, and filtering to obtain modified latex;

further, the latex in the step (2) is one of neoprene latex, styrene-butadiene latex, natural latex and nitrile-butadiene latex.

Further, in the step (3), the addition amount of the ferric trichloride is 0.08-0.1% of the solid content of the latex.

Further, before the initiator and the acrylate monomer are added in the step (4), the AEO-9 soap solution prepared in the step (2) is used for pre-emulsification, and when pre-emulsification is carried out, the mass ratio of the AEO-9 soap solution to the acrylate monomer is 3: 1.

Further, the initiator in the step (4) is one of hydrogen peroxide, tert-butyl hydroperoxide and dicumyl peroxide; the acrylic monomer is one of methyl acrylate, ethyl acrylate, butyl acrylate, isobutyl acrylate, methyl methacrylate, ethyl methacrylate and butyl methacrylate.

Further, the thickener is one or more of carboxymethyl cellulose, sodium alginate and polyvinyl alcohol.

Further, the powder particle skeleton material is one of zinc oxide, calcium carbonate, diatomite, montmorillonite and zinc oxide ultrafine powder.

Further, the preparation method of the environment-friendly water-based adhesive comprises the following steps.

Selecting 30-95 parts of modified latex, adding 5-50 parts of APAO emulsion, adding 3-5 parts of powder particle skeleton material and 0.5-2 parts of thickening agent to adjust the viscosity, stirring and mixing uniformly, and adjusting the pH value of the solution to be more than 8 by using an ammonia water solution to obtain the environment-friendly water-based adhesive.

The application also protects the application of the environment-friendly water-based adhesive in home decoration and automobile industry.

Has the advantages that:

(1) the main components of the environment-friendly water-based adhesive are natural adhesive and a small amount of alpha olefin copolymer, after the stickers are removed, the adhesive on the back of the stickers can be cleaned, no residue is left on the pasted wall surface, ground surface and other parts, the stickers are convenient to replace, and the cleaning procedure is reduced.

(2) The invention adopts the modified latex, and solves the problems that the adhesive is easy to deteriorate during the storage period and the bonding force is unstable.

(3) The modified latex of the environment-friendly water-based adhesive disclosed by the invention and APAO molecules are mutually matched and cooperate, the bonding strength is high, the molecular chain of the APAO is extremely soft, the long-acting bonding force can be provided after latex emulsion breaking, although the power is very small, the phenomena that the bonding force is not reproducible after latex curing, the bonding force is not enough for a long time, the bonding force gradually falls off, the grafting of methyl methacrylate is realized, the intermolecular compatibility is good, the mutual winding is realized, and the condition that the APAO is stuck off is prevented.

(4) The preparation process of the aqueous adhesive disclosed by the invention is low in energy consumption, free of pollution, free of VOC (volatile organic compounds) emission, free of organic solvent recovery treatment, free of adverse effect on the environment, environment-friendly and efficient.

Detailed Description

In order to make the technical solutions in the present application better understood, the present invention is further described below with reference to examples, which are only a part of examples of the present application, but not all examples, and the present invention is not limited by the following examples.

Test example 1