CN112080226B - Environment-friendly formaldehyde-free adhesive with long opening time and preparation method thereof - Google Patents
Environment-friendly formaldehyde-free adhesive with long opening time and preparation method thereof Download PDFInfo
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- CN112080226B CN112080226B CN202011037983.8A CN202011037983A CN112080226B CN 112080226 B CN112080226 B CN 112080226B CN 202011037983 A CN202011037983 A CN 202011037983A CN 112080226 B CN112080226 B CN 112080226B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J113/00—Adhesives based on rubbers containing carboxyl groups
- C09J113/02—Latex
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Adhesives Or Adhesive Processes (AREA)
Abstract
An environment-friendly formaldehyde-free adhesive with long opening time and a preparation method thereof belong to the technical field of fine polymer chemical industry; the water-based aldehyde-free glue disclosed by the invention can realize the aldehyde-free effect of a product, only releases water vapor in the whole production process, and realizes the environment-friendly emission of a factory; under the condition of reducing the raw materials of the existing adhesive, the auxiliary adhesive prepared by the invention is used for preparing the adhesive with low cost, so that the material cost is reduced from about 3200 to about 2100 originally, and the bonding strength is not influenced; by adding the acrylic emulsion, the open time of the glue is successfully increased from 20 minutes to 90 minutes, and the gluing strength is not changed after the time delay.
Description
Technical Field
The invention belongs to the technical field of fine polymer chemical engineering, and particularly relates to an environment-friendly formaldehyde-free adhesive with long opening time and a preparation method thereof.
Background
In nature, substance-to-substance adhesiveness has been widely recognized, and proteins are adhesive substances capable of acting as such. Mussels proteins, which are known as marine adhesive proteins, are very adhesive, even on wet surfaces, as in the ocean, and form a strong adhesive effect. Therefore, by studying the relationship between the structure and the performance of such proteins, it is expected to obtain an aqueous aldehyde-free adhesive containing proteins as main components by utilizing the biomimetic function. In nature, the vegetable protein has the advantages of being reproducible, easily available, environment-friendly and the like, so that the development and utilization of the vegetable protein have profound significance. The soybean protein is one of widely used plant proteins, is a byproduct after soybean oil extraction, is mostly used in the food industry, and is also applied to the fields of materials such as adhesives, degradable plastics and the like. Corn gluten meal is also a vegetable protein and has a lower price than soy protein, so that the corn gluten meal has a wider prospect for development and utilization. Starch is a product of plant photosynthesis, and is one of the most abundant natural polymer resources in the nature. The adhesive property between vegetable protein and starch has been known and used for a long time, but the practical application is limited because the adhesive has the defects of low strength, low water resistance, easy mildewing and deterioration and the like. Due to the unique advantages of low price, reproducibility, environmental friendliness and the like of natural polymers, and due to the increasing shortage of petroleum resources, the continuous rising of crude oil price and the problem of environmental pollution, the research and application of natural polymer materials based on renewable resources are widely regarded, and the research on vegetable proteins and starch adhesives becomes a research hotspot.
Currently, there are three types of aldehyde-free adhesives commonly used in the market: biological protein glue (soybean glue, starch glue, and the like), isocyanate glue (polyurethane glue, MDI glue), and thermoplastic resin adhesive. However, the above-mentioned formaldehyde-free adhesives also show up in use: the curing time is too fast, which results in the need for factory adjustments and complicates processing. These problems also indirectly cause that the environment-friendly formaldehyde-free adhesive is difficult to popularize and use in the industries of artificial boards and furniture.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides an environment-friendly formaldehyde-free adhesive with long opening time and a preparation method thereof.
The technical problem of the invention is mainly solved by the following technical scheme: the environment-friendly formaldehyde-free adhesive with long opening time is prepared from 700-800 parts of water, 4-8 parts of polyvinyl alcohol, 14-16 parts of cross-linking agent, 80-160 parts of carboxylic styrene-butadiene latex, 20-40 parts of acrylic emulsion, 1-2 parts of surfactant and 10-16 parts of auxiliary rubber according to parts by mass, wherein the average polymerization degree of the polyvinyl alcohol is 1799.
Preferably, the crosslinking agent is selected from one of isocyanate, toluene diisocyanate or diphenylmethane diisocyanate.
Preferably, the surfactant is selected from one of sodium dodecyl sulfate or sodium dodecyl sulfate.
Preferably, the auxiliary glue is prepared by dissolving modified starch or sodium carboxyvitamin in water.
A preparation method of an environment-friendly formaldehyde-free adhesive with long opening time comprises the following steps:
step 1, adding 4-8 parts of polyvinyl alcohol and 700-800 parts of water into a stirring reaction kettle according to the mass part ratio, stirring after the temperature is raised to 95 ℃ in the stirring reaction kettle, and preserving heat for half an hour after stirring to obtain polyvinyl alcohol glue;
step 2, stirring the polyvinyl alcohol glue obtained in the step 1, cooling to 32 ℃, and adding 1-2 parts of surfactant in the stirring process to obtain polyvinyl alcohol mixed glue;
step 3, dripping 14-16 parts of cross-linking agent into the polyvinyl alcohol mixed glue obtained in the step 2, stirring for temperature control reaction after dripping the cross-linking agent, and uniformly stirring to obtain modified polyvinyl alcohol glue;
step 4, adding 10-16 parts of auxiliary glue into the modified polyvinyl alcohol glue obtained in the step 3, and uniformly mixing and stirring the auxiliary glue and the modified polyvinyl alcohol glue to obtain mixed modified polyvinyl alcohol glue;
and 5, adding 80-160 parts of carboxylic styrene-butadiene latex and 20-40 parts of acrylic emulsion into the mixed modified polyvinyl alcohol glue obtained in the step 4, and uniformly stirring the carboxylic styrene-butadiene latex, the acrylic emulsion and the mixed modified polyvinyl alcohol glue to obtain the product.
The invention has the following beneficial effects:
the invention is the water-based aldehyde-free glue, not only can the product realize the aldehyde-free, but also only releases water vapor in the whole production and manufacturing process, thereby realizing the environmental protection emission of factories; under the condition of reducing the raw materials of the existing adhesive, the auxiliary adhesive prepared by the invention is used for preparing the adhesive with low cost, so that the material cost is reduced from about 3200 to about 2100 originally, and the bonding strength is not influenced; by adding the acrylic emulsion, the open time of the glue is successfully increased from 20 minutes to 90 minutes, and the gluing strength is not changed after the time delay.
Drawings
FIG. 1 is a schematic view of aIs a flow chart of the preparation method of the invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
The embodiment is as follows: the environment-friendly formaldehyde-free adhesive with long opening time is prepared from 700-800 parts by mass of water, 4-8 parts by mass of polyvinyl alcohol, 14-16 parts by mass of a cross-linking agent, 80-160 parts by mass of carboxylic styrene-butadiene latex, 20-40 parts by mass of acrylic emulsion, 1-2 parts by mass of a surfactant and 10-16 parts by mass of an auxiliary adhesive, wherein the average polymerization degree of the polyvinyl alcohol is 1799.
The cross-linking agent is selected from one of isocyanate, toluene diisocyanate or diphenylmethane diisocyanate.
The surfactant is selected from one of sodium dodecyl sulfate or sodium dodecyl sulfate.
The auxiliary glue is prepared by dissolving modified starch or sodium carboxy vitamin in water.
A preparation method of an environment-friendly formaldehyde-free adhesive with long opening time comprises the following steps:
step 1, adding 4-8 parts of polyvinyl alcohol and 700-800 parts of water into a stirring reaction kettle according to the mass part ratio, stirring after the temperature is raised to 95 ℃ in the stirring reaction kettle, and preserving heat for half an hour after stirring to obtain polyvinyl alcohol glue;
step 2, stirring the polyvinyl alcohol glue obtained in the step 1, cooling to 32 ℃, and adding 1-2 parts of surfactant in the stirring process to obtain polyvinyl alcohol mixed glue;
step 3, dripping 14-16 parts of cross-linking agent into the polyvinyl alcohol mixed glue obtained in the step 2, stirring for temperature control reaction after dripping the cross-linking agent, and uniformly stirring to obtain modified polyvinyl alcohol glue;
step 4, adding 10-16 parts of auxiliary glue into the modified polyvinyl alcohol glue obtained in the step 3, and uniformly mixing and stirring the auxiliary glue and the modified polyvinyl alcohol glue to obtain mixed modified polyvinyl alcohol glue;
and 5, adding 80-160 parts of carboxylic styrene-butadiene latex and 20-40 parts of acrylic emulsion into the mixed modified polyvinyl alcohol glue obtained in the step 4, and uniformly stirring the carboxylic styrene-butadiene latex, the acrylic emulsion and the mixed modified polyvinyl alcohol glue to obtain the product.
Example 1, asFIG. 1 is a schematic view of aThe preparation method of the environment-friendly formaldehyde-free adhesive with long opening time comprises the following steps:
step 1, adding 7 parts of polyvinyl alcohol and 750 parts of water into a stirring reaction kettle according to the mass part ratio, stirring after the temperature is raised to 95 ℃ in the stirring reaction kettle, and preserving heat for half an hour after stirring to obtain polyvinyl alcohol glue;
step 2, stirring the polyvinyl alcohol glue obtained in the step 1, cooling to 32 ℃, and adding 1 part of sodium dodecyl sulfate in the stirring process to obtain polyvinyl alcohol mixed glue;
step 3, 14 parts of toluene diisocyanate is dripped into the polyvinyl alcohol mixed glue obtained in the step 2, stirring temperature control reaction is carried out after the toluene diisocyanate is dripped, and the modified polyvinyl alcohol glue is obtained after uniform stirring;
step 4, adding 10 parts of modified starch into the modified polyvinyl alcohol glue obtained in the step 3, and mixing and stirring the modified starch and the modified polyvinyl alcohol glue uniformly to obtain mixed modified polyvinyl alcohol glue;
and 5, simultaneously adding 80 parts of carboxylic styrene-butadiene latex and 30 parts of acrylic emulsion into the mixed modified polyvinyl alcohol glue obtained in the step 4, and uniformly stirring the carboxylic styrene-butadiene latex, the acrylic emulsion and the mixed modified polyvinyl alcohol glue to obtain the product.
The invention relates to application of an environment-friendly formaldehyde-free adhesive with long opening time
The product of the invention is uniformly coated on the eucalyptus wood board to produce 7 layers of eucalyptus wood boards, the cold pressing pressure is 12MPA, the time is 2 hours, and the hot pressing pressure is 12MPA, the time is 60 minutes. After the produced plywood is boiled in water at 63 ℃ for 3 hours, 12 sample plates are detected, the shearing strength is greater than 0.7Mpa, and the percent of pass is 100%.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention should be considered to be within the scope of the present invention.
Claims (3)
1. The preparation method of the environment-friendly formaldehyde-free adhesive with long opening time is characterized by comprising the following steps:
step 1, adding 4-8 parts of polyvinyl alcohol and 700-800 parts of water into a stirring reaction kettle according to the mass part ratio, stirring after the temperature is raised to 95 ℃ in the stirring reaction kettle, and preserving heat for half an hour after stirring to obtain polyvinyl alcohol glue, wherein the average polymerization degree of the polyvinyl alcohol is 1799;
step 2, stirring the polyvinyl alcohol glue obtained in the step 1, cooling to 32 ℃, and adding 1-2 parts of surfactant in the stirring process to obtain polyvinyl alcohol mixed glue;
step 3, dripping 14-16 parts of cross-linking agent into the polyvinyl alcohol mixed glue obtained in the step 2, stirring for temperature control reaction after dripping the cross-linking agent, and uniformly stirring to obtain modified polyvinyl alcohol glue;
step 4, adding 10-16 parts of auxiliary glue into the modified polyvinyl alcohol glue obtained in the step 3, wherein the auxiliary glue is prepared by dissolving modified starch in water, and mixing and stirring the auxiliary glue and the modified polyvinyl alcohol glue uniformly to obtain mixed modified polyvinyl alcohol glue;
and 5, adding 80-160 parts of carboxylic styrene-butadiene latex and 20-40 parts of acrylic emulsion into the mixed modified polyvinyl alcohol glue obtained in the step 4, and uniformly stirring the carboxylic styrene-butadiene latex, the acrylic emulsion and the mixed modified polyvinyl alcohol glue to obtain the product.
2. The method for preparing the environment-friendly adhesive with long open time and no aldehyde according to claim 1, wherein the crosslinking agent is toluene diisocyanate and/or diphenylmethane diisocyanate.
3. The method for preparing the environment-friendly adhesive with long open time according to claim 1, wherein the surfactant is selected from one of sodium dodecyl sulfate and sodium dodecyl sulfate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011037983.8A CN112080226B (en) | 2020-09-28 | 2020-09-28 | Environment-friendly formaldehyde-free adhesive with long opening time and preparation method thereof |
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| CN202011037983.8A CN112080226B (en) | 2020-09-28 | 2020-09-28 | Environment-friendly formaldehyde-free adhesive with long opening time and preparation method thereof |
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| CN112080226A CN112080226A (en) | 2020-12-15 |
| CN112080226B true CN112080226B (en) | 2022-10-04 |
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| CN115181512B (en) * | 2022-08-18 | 2024-03-26 | 常州市公园管理中心 | Special filling material for repairing tree holes and preparation method thereof |
| CN115772383A (en) * | 2022-12-09 | 2023-03-10 | 上海昶法新材料有限公司 | Lignin formaldehyde-free glue and preparation method thereof |
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| JP4852202B2 (en) * | 2001-06-29 | 2012-01-11 | トッパン・フォームズ株式会社 | Pressure sensitive adhesive composition and information carrying sheet using the same |
| CN103013383B (en) * | 2012-12-27 | 2015-08-19 | 广东达美新材料有限公司 | A kind of water-borne pressure sensitive adhesive and preparation method thereof |
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