CN111574932A - Environment-friendly modified starch adhesive and preparation method thereof - Google Patents
Environment-friendly modified starch adhesive and preparation method thereof Download PDFInfo
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- CN111574932A CN111574932A CN202010649046.1A CN202010649046A CN111574932A CN 111574932 A CN111574932 A CN 111574932A CN 202010649046 A CN202010649046 A CN 202010649046A CN 111574932 A CN111574932 A CN 111574932A
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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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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Abstract
The invention relates to the technical field of adhesives, in particular to an environment-friendly modified starch adhesive which is prepared from the following raw materials in parts by weight: the environment-friendly modified starch adhesive comprises, by weight, 50-75 parts of mixed starch, 8-16 parts of sodium thiosulfate, 15-25 parts of sodium hydroxide, 0.5-1.5 parts of hydrochloric acid, 10-12 parts of polyvinyl alcohol PVA-17885, 10-12 parts of ammonium persulfate, 15-20 parts of an emulsifier, 5-8 parts of a preservative and 1-5 parts of vinyl acetate.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to an environment-friendly modified starch adhesive and a preparation method thereof.
Background
The traditional adhesive is mainly prepared from resin and an organic solvent, volatile solvents harmful to human bodies can be generated in the processes of production, use and subsequent drying, and formaldehyde is also generated, so that the traditional adhesive is gradually replaced by a water-based adhesive, the water-based adhesive is environment-friendly compared with the traditional organic solvent-based adhesive, the main components of the water-based adhesive are mainly prepared from various resins and emulsions, the water-based adhesive is not really environment-friendly and non-renewable, and the solvent is water, so that the adhesive is easy to crack under the environment of high temperature and high humidity, and the quality of products is influenced. As starch is one of main grain crops in China, has rich resources and wide sources, is natural, green, environment-friendly and renewable, most of the existing adhesives take starch as a main connecting material, the starch is heated and swelled to obtain gelatinized starch, the gelatinized starch obtained by the method contains a large number of hydrogen bonds, so that the system has poor flowability, high viscosity, easy caking, short storage time, poor adhesive force and unsuitability for large-scale industrial application, and simultaneously has the problems of mildewing, weak bonding capability, poor plasticizing effect and the like, and aldehyde-free adhesives prepared from the starch are often used for bonding paper boards, wood boards and the like, sometimes the materials such as the paper boards or the wood boards need to be used for containing high-low temperature substances or used under severe conditions such as high-temperature high-humidity, high-low temperature cyclic impact and the like, but the traditional starch adhesives have poor weather resistance and cannot meet the use requirements of the severe conditions, therefore, an environment-friendly modified starch adhesive and a preparation method thereof are provided to solve the problems.
Disclosure of Invention
The invention aims to solve the defects of low adhesive force and poor environmental protection performance of the existing starch adhesive in the prior art, and provides an environment-friendly modified starch adhesive and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
an environment-friendly modified starch adhesive is designed, and comprises the following raw materials in parts by weight: 50-75 parts of mixed starch, 8-16 parts of sodium thiosulfate, 15-25 parts of sodium hydroxide, 0.5-1.5 parts of hydrochloric acid, 15-20 parts of polyvinyl alcohol PVA-17885, 10-12 parts of ammonium persulfate, 15-20 parts of emulsifier, 5-8 parts of preservative and 1-5 parts of vinyl acetate.
Preferably, the feed consists of the following raw materials in parts by weight: 60 parts of mixed starch, 12 parts of sodium thiosulfate, 20 parts of sodium hydroxide, 1 part of hydrochloric acid, 17 parts of emulsifier, 7 parts of preservative and 3 parts of vinyl acetate.
Preferably, the mixed starch comprises, by weight, 5-20 parts of corn starch, 10-15 parts of glutinous rice flour, 7-12 parts of tapioca starch, 6-12 parts of oxidized starch, 5-12 parts of esterified starch, 2-6 parts of etherified starch and 3-5 parts of white dextrin yellow dextrin.
Preferably, the mixed starch comprises 20 parts of corn starch, 14 parts of glutinous rice flour, 10 parts of cassava starch, 8 parts of oxidized starch, 9 parts of esterified starch, 5 parts of etherified starch and 4 parts of white dextrin yellow dextrin according to parts by weight.
Preferably, the emulsifier is octyl phenol polyoxyethylene ether (OP-10).
Preferably, the particle size of the mixed starch is 300-350 meshes.
The preparation method of the environment-friendly modified starch adhesive comprises the following steps:
s1, taking the mixed starch according to the weight part ratio, stirring and mixing, adjusting the pH value to 7.4-8.6, putting into a crusher for crushing, adjusting the grinding pitch to 12-15 μm, and carrying out superfine crushing for 20-25min to prepare a mixture A.
S2, adding the mixture into a reaction kettle, heating to 50-59 ℃, adding the mixture A in batches, mixing and stirring for 10-30min at the stirring speed of 150-; adding ammonium persulfate, emulsifier, preservative and ammonium persulfate, stirring at constant temperature of 50 deg.C for 20-30min at stirring speed of 90-110 r/min; adding hydrochloric acid for neutralization, adjusting the pH value to 7.2-7.6, cooling to room temperature, and discharging to obtain modified starch;
s3, uniformly mixing the modified starch, the polyvinyl alcohol PVA-1788 and the vinyl acetate, and stirring for 10-30min at the stirring speed of 150-160r/min to prepare the adhesive.
The invention provides an environment-friendly modified starch adhesive and a preparation method thereof, and the environment-friendly modified starch adhesive has the beneficial effects that: compared with the prior art, the invention prepares the real environment-friendly adhesive by using the starch raw material without formaldehyde.
Detailed Description
The invention is further illustrated by the following examples.
Example 1
An environment-friendly modified starch adhesive is composed of the following raw materials in parts by weight: 50 parts of mixed starch, 8 parts of sodium thiosulfate, 15 parts of sodium hydroxide, 0.5 part of hydrochloric acid, polyvinyl alcohol PVA-17885 parts, 10 parts of ammonium persulfate, 15 parts of emulsifier, 5 parts of preservative and 1 part of vinyl acetate, wherein the mixed starch comprises 5 parts of corn starch, 10 parts of glutinous rice flour, 7 parts of cassava starch, 6 parts of oxidized starch, 5 parts of esterified starch, 2 parts of etherified starch and 3 parts of white dextrin and yellow dextrin according to parts by weight, the particle size of the mixed starch is 300 meshes, and the emulsifier is octyl phenol polyoxyethylene ether (OP-10).
The preparation method of the environment-friendly modified starch adhesive comprises the following steps:
s1, taking the mixed starch according to the weight part ratio, stirring and mixing, adjusting the pH value to 7.4, putting the mixture into a grinder for grinding, adjusting the grinding pitch to be 12 mu m, and carrying out superfine grinding for 20min to prepare a mixture A.
S2, adding the mixture into a reaction kettle, heating to 50 ℃, adding the mixture A in batches, mixing and stirring for 30min at the stirring speed of 150r/min, slowly adding sodium thiosulfate and sodium hydroxide, stirring for 30min at constant temperature, wherein the temperature is 45 ℃, and the stirring speed is 130 r/min; adding ammonium persulfate, emulsifier, preservative and ammonium persulfate, stirring at constant temperature of 50 ℃ and stirring speed of 110r/min for 30 min; adding hydrochloric acid for neutralization, adjusting the pH value to 7.6, cooling to room temperature, and discharging to obtain modified starch;
s3, uniformly mixing the modified starch, the polyvinyl alcohol PVA-1788 and the vinyl acetate, and stirring for 30min at the stirring speed of 160r/min to prepare the adhesive.
Example 2
An environment-friendly modified starch adhesive is composed of the following raw materials in parts by weight: 75 parts of mixed starch, 16 parts of sodium thiosulfate, 25 parts of sodium hydroxide, 1.5 parts of hydrochloric acid, PVA-178812 parts of polyvinyl alcohol, 12 parts of ammonium persulfate, 20 parts of emulsifier, 8 parts of preservative and 5 parts of vinyl acetate, wherein the mixed starch comprises 20 parts of corn starch, 15 parts of glutinous rice flour, 12 parts of cassava starch, 12 parts of oxidized starch, 12 parts of esterified starch, 6 parts of etherified starch and 5 parts of white dextrin and yellow dextrin according to parts by weight, the particle size of the mixed starch is 350 meshes, and the emulsifier is octyl phenol polyoxyethylene ether (OP-10).
The preparation method of the environment-friendly modified starch adhesive comprises the following steps:
s1, taking the mixed starch according to the weight part ratio, stirring and mixing, adjusting the pH value to 8.6, putting the mixture into a grinder for grinding, adjusting the grinding pitch to 15 mu m, and carrying out superfine grinding for 25min to prepare a mixture A.
S2, adding the mixture into a reaction kettle, heating to 59 ℃, adding the mixture A in batches, mixing and stirring for 10min at the stirring speed of 150r/min, slowly adding sodium thiosulfate and sodium hydroxide, stirring for 20min at constant temperature, wherein the temperature is 45 ℃, and the stirring speed is 120 r/min; adding ammonium persulfate, emulsifier, preservative and ammonium persulfate, stirring at constant temperature of 50 ℃ for 20min and stirring speed of 90 r/min; adding hydrochloric acid for neutralization, adjusting the pH value to 7.2, cooling to room temperature, and discharging to obtain modified starch;
s3, uniformly mixing the modified starch, the polyvinyl alcohol PVA-1788 and the vinyl acetate, and stirring for 30min at the stirring speed of 160r/min to prepare the adhesive.
Example 3
An environment-friendly modified starch adhesive is composed of the following raw materials in parts by weight: 60 parts of mixed starch, 12 parts of sodium thiosulfate, 20 parts of sodium hydroxide, 1 part of hydrochloric acid, PVA-17889 parts of polyvinyl alcohol, 11 parts of ammonium persulfate, 17 parts of an emulsifier, 7 parts of a preservative and 3 parts of vinyl acetate, wherein the mixed starch comprises 20 parts of corn starch, 14 parts of glutinous rice flour, 10 parts of cassava starch, 8 parts of oxidized starch, 9 parts of esterified starch, 5 parts of etherified starch and 4 parts of white dextrin yellow dextrin according to parts by weight, the particle size of the mixed starch is 330 meshes, and the emulsifier is octyl phenol polyoxyethylene ether (OP-10).
The preparation method of the environment-friendly modified starch adhesive comprises the following steps:
s1, taking the mixed starch according to the weight part ratio, stirring and mixing, adjusting the pH value to 8.2, putting the mixture into a grinder for grinding, adjusting the grinding pitch to 13 mu m, and carrying out superfine grinding for 22min to prepare a mixture A.
S2, adding the mixture into a reaction kettle, heating to 55 ℃, adding the mixture A in batches, mixing and stirring for 25min at the stirring speed of 155r/min, slowly adding sodium thiosulfate and sodium hydroxide, stirring for 25min at constant temperature, wherein the temperature is 45 ℃, and the stirring speed is 125 r/min; adding ammonium persulfate, emulsifier, preservative and ammonium persulfate, stirring at constant temperature of 50 deg.C and stirring rate of 100r/min for 25 min; adding hydrochloric acid for neutralization, adjusting the pH value to 7.5, cooling to room temperature, and discharging to obtain modified starch;
s3, uniformly mixing the modified starch, the polyvinyl alcohol PVA-1788 and the vinyl acetate, and stirring for 25min at the stirring speed of 155r/min to prepare the adhesive.
Compared with the prior art, the invention prepares the real environment-friendly adhesive by using the starch raw material without formaldehyde.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The environment-friendly modified starch adhesive is characterized by comprising the following raw materials in parts by weight: 50-75 parts of mixed starch, 8-16 parts of sodium thiosulfate, 15-25 parts of sodium hydroxide, 0.5-1.5 parts of hydrochloric acid, 15-20 parts of polyvinyl alcohol PVA-17885, 10-12 parts of ammonium persulfate, 15-20 parts of emulsifier, 5-8 parts of preservative and 1-5 parts of vinyl acetate.
2. The environment-friendly modified starch adhesive as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 60 parts of mixed starch, 12 parts of sodium thiosulfate, 20 parts of sodium hydroxide, 1 part of hydrochloric acid, 17 parts of emulsifier, 7 parts of preservative and 3 parts of vinyl acetate.
3. The environment-friendly modified starch adhesive according to claims 1-2, wherein the mixed starch comprises, by weight, 5-20 parts of corn starch, 10-15 parts of glutinous rice flour, 7-12 parts of tapioca starch, 6-12 parts of oxidized starch, 5-12 parts of esterified starch, 2-6 parts of etherified starch and 3-5 parts of white dextrin yellow dextrin.
4. The environment-friendly modified starch adhesive as claimed in claim 3, wherein the mixed starch comprises 20 parts by weight of corn starch, 14 parts by weight of glutinous rice flour, 10 parts by weight of tapioca starch, 8 parts by weight of oxidized starch, 9 parts by weight of esterified starch, 5 parts by weight of etherified starch and 4 parts by weight of white dextrin yellow dextrin.
5. The environment friendly modified starch binder as claimed in claims 1-2, wherein the emulsifier is octyl phenol polyoxy ethyl ether (OP-10).
6. The environment-friendly modified starch adhesive as claimed in claims 1-2, wherein the particle size of the mixed starch is 300-350 mesh.
7. The method for preparing the environment-friendly modified starch adhesive according to claims 1 to 6, comprising the following steps:
s1, taking the mixed starch according to the weight part ratio, stirring and mixing, adjusting the pH value to 7.4-8.6, putting into a crusher for crushing, adjusting the grinding pitch to 12-15 μm, and carrying out superfine crushing for 20-25min to prepare a mixture A;
s2, adding the mixture into a reaction kettle, heating to 50-59 ℃, adding the mixture A in batches, mixing and stirring for 10-30min at the stirring speed of 150-; adding ammonium persulfate, emulsifier, preservative and ammonium persulfate, stirring at constant temperature of 50 deg.C for 20-30min at stirring speed of 90-110 r/min; adding hydrochloric acid for neutralization, adjusting the pH value to 7.2-7.6, cooling to room temperature, and discharging to obtain modified starch;
s3, uniformly mixing the modified starch, the polyvinyl alcohol PVA-1788 and the vinyl acetate, and stirring for 10-30min at the stirring speed of 150-160r/min to prepare the adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010649046.1A CN111574932A (en) | 2020-07-08 | 2020-07-08 | Environment-friendly modified starch adhesive and preparation method thereof |
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| CN202010649046.1A CN111574932A (en) | 2020-07-08 | 2020-07-08 | Environment-friendly modified starch adhesive and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1552789A (en) * | 2003-06-04 | 2004-12-08 | 北京有色金属研究总院 | Adhesion agent and preparing method thereof |
| CN101760149A (en) * | 2009-12-29 | 2010-06-30 | 莫元烈 | Environmental-friendly amylopectin composite adhesive for paper products and production method thereof |
| CN103242786A (en) * | 2013-04-22 | 2013-08-14 | 常州大学 | Preparation method of environment-friendly modified starch adhesive for cigarette |
| CN110551462A (en) * | 2019-09-20 | 2019-12-10 | 永发印务(东莞)有限公司 | environment-friendly high-viscosity weather-resistant modified starch adhesive and preparation method thereof |
-
2020
- 2020-07-08 CN CN202010649046.1A patent/CN111574932A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1552789A (en) * | 2003-06-04 | 2004-12-08 | 北京有色金属研究总院 | Adhesion agent and preparing method thereof |
| CN101760149A (en) * | 2009-12-29 | 2010-06-30 | 莫元烈 | Environmental-friendly amylopectin composite adhesive for paper products and production method thereof |
| CN103242786A (en) * | 2013-04-22 | 2013-08-14 | 常州大学 | Preparation method of environment-friendly modified starch adhesive for cigarette |
| CN110551462A (en) * | 2019-09-20 | 2019-12-10 | 永发印务(东莞)有限公司 | environment-friendly high-viscosity weather-resistant modified starch adhesive and preparation method thereof |
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Application publication date: 20200825 |