CN111234110A - Preparation method of environment-friendly kraft paper starch glue - Google Patents
Preparation method of environment-friendly kraft paper starch glue Download PDFInfo
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- CN111234110A CN111234110A CN202010163537.5A CN202010163537A CN111234110A CN 111234110 A CN111234110 A CN 111234110A CN 202010163537 A CN202010163537 A CN 202010163537A CN 111234110 A CN111234110 A CN 111234110A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
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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
- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/02—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to polysaccharides
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- Organic Chemistry (AREA)
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- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a preparation method of environment-friendly kraft paper starch glue, which comprises the following steps: adding a starch raw material and water into a reaction kettle, heating to 60-85 ℃, heating for gelatinization, controlling the stirring rate, adding a silane coupling agent under the condition of 600-1000rp, reacting for 1h, and cooling to below 40 ℃; adding an emulsifier and an initiator, stirring for reaction for 10-30 minutes, then dropwise adding the pre-emulsified acrylic acid derivatives in a continuous feeding mode, reacting for 2 hours at 60-80 ℃, adjusting the pH value of the emulsion by using a sodium bicarbonate solution, filtering, and adding a defoaming agent, a mildew preventive and a leveling agent to obtain the starch glue. The kraft starch glue prepared by the invention is applied to kraft paper, has no fracture and curling, and has the advantages of strong bearing tension, short bonding time, long service life after wetting and high stripping strength.
Description
Technical Field
The invention relates to the technical field of modified starch and adhesives, in particular to a preparation method of environment-friendly kraft paper starch adhesive.
Background
Starch is a natural biological high molecular substance, has the characteristics of biodegradability, rich sources, low price and the like, and has become the key point of the research on biodegradable materials in recent years. However, unmodified starch adhesives have high viscosity, poor fluidity, storage stability and water resistance, and due to high dispersibility and strong interaction between molecules of starch, interfacial attraction between starch and other polymer materials is too weak, compatibility is poor, and mechanical properties are poor, so that the application range of the starch adhesive is limited, and therefore, many researches are in search of suitable methods for modifying the starch adhesive.
With the environmental protection importance of the country, some countries and regions forbid the introduction of common glue such as BOPP adhesive tapes and the like into the environment, particularly the environment protection requirements of European and American regions on imported products are very high, and the base materials and the adhesive of the kraft paper adhesive tapes do not cause pollution to the environment and can be recycled along with packing materials. Most of the kraft paper adhesives commonly used at present are water-free kraft paper adhesive tapes, the adhesive surfaces of the kraft paper adhesive tapes are coated with self-adhesive adhesives such as hot melt adhesives or rubber, but the kraft paper adhesive tapes are easy to oxidize and deteriorate and are not suitable for long-term storage, so that the development of a wet kraft paper adhesive tape which is not self-adhesive and can generate adhesive starch after water is used has important significance.
Disclosure of Invention
The invention aims to solve the problems that: the preparation method of the environment-friendly kraft paper starch adhesive is provided, and the prepared kraft paper starch adhesive is high in initial viscosity, large in stripping degree and strong in tensile force.
The technical scheme provided by the invention for solving the problems is as follows: the preparation method of the environment-friendly kraft paper starch glue comprises the following steps:
(1) adding starch raw materials and water into a reaction kettle, heating to 60-85 ℃, heating for gelatinization, controlling the stirring speed to be under 600-plus-material 1000rpm, adding a silane coupling agent, reacting for 1h, and cooling to below 40 ℃;
(2) adding an emulsifier and an initiator, and stirring for reaction for 10-30 minutes;
(3) and then dripping pre-emulsified acrylic acid derivatives in a continuous feeding mode, reacting for 2 hours at the temperature of 60-80 ℃, adjusting the pH value of the emulsion by using a sodium bicarbonate solution, filtering, and adding a defoaming agent, a mildew preventive and a flatting agent to obtain the starch glue.
Preferably, the starch is one of corn starch, tapioca starch, barley starch and potato starch, and the weight ratio of the starch to the water is 1: 1 to 3.
Preferably, the silane coupling agent is one of vinyl triethoxysilane, vinyl trimethoxysilane, vinyl tris (β -methoxyethoxy) silane, gamma-aminopropyltriethoxysilane, gamma- (2, 3-glycidoxy) propyltrimethoxysilane and gamma-methacryloxypropyltrimethoxysilane, and the amount of the silane coupling agent is 8-10% of the weight of the starch.
Preferably, the initiator is one of ammonium ceric nitrate-ammonium persulfate, ammonium ceric nitrate-potassium persulfate, sodium bisulfite-ammonium persulfate, ferrous sulfate-ammonium persulfate and silver nitrate-potassium persulfate, and the dosage of the initiator is 1.0-5.0% of the weight of the starch.
Preferably, the emulsifier is a nonionic emulsifier, and is one of sorbitan monooleate, polyoxyethylene 20 sorbitan monooleate, monoglyceride and sucrose fatty acid ester, and the content of the emulsifier is 0.5-1% of the weight of the starch.
Preferably, the pre-emulsified acrylic acid derivative is a mixture of more than two of methyl acrylate, methacrylic acid, acrylic acid, butyl acrylate, methyl methacrylate, vinyl acetate and 2-hydroxyethyl acrylate, and the dosage of the pre-emulsified acrylic acid derivative is 20-50% of the weight of starch.
Preferably, the defoaming agent is one of a mineral oil defoaming agent, an organic silicone oil defoaming agent and a polyether defoaming agent, and the dosage of the defoaming agent is 0.05-0.1% of the weight of the starch.
Preferably, the mildew preventive is one of o-phenylphenol, 2-pyridinethiol-1-zinc oxide and ammonium persulfate, and the dosage of the mildew preventive is 0.05-0.1% of the weight of starch.
Compared with the prior art, the invention has the advantages that: according to the invention, through an emulsion polymerization grafting mode and introducing siloxane groups into the structure, a chemical bond with higher strength can be formed on a bonding interface, the bonding with a bonded framework material is easy, the bonding strength is greatly improved, the water resistance, weather resistance and other properties of the bonding material can be improved, and the bonding material has better mildew resistance and bonding property compared with non-modified starch; the adhesive layer applied to the kraft paper can ensure that the adhesive time is short, the usable time is long after wetting, the peelable strength is high, and no fracture or edge curl occurs in the paper base coating process. In addition, the surface kraft paper material does not need strict treatment process in the application process, has low cost and strong viscosity, does not have corner upwarping or high temperature resistance and the like, and is suitable for the environment-friendly adhesive tape with the international development trend. The product belongs to a green environment-friendly product, has the characteristics of high initial adhesion, large stripping degree, strong tension and the like, and the base material and the adhesive of the wet kraft paper adhesive tape do not cause pollution to the environment and can be recycled along with the packing materials.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
Example 1
The environment-friendly kraft paper starch glue of the embodiment is prepared by the following steps:
adding 500kg of corn starch raw material and 500kg of water into a reaction kettle, raising the temperature to 85 ℃, heating and pasting, controlling the stirring speed to be under 600rpm, adding 40kg of silane coupling agent vinyl triethoxysilane, cooling to 40 ℃ after reacting for 1h, adding 5kg of emulsifier sorbitan monooleate and 2.5kg of initiator ammonium ceric nitrate-ammonium persulfate, stirring for 10 min, dropwise adding 250kg of pre-emulsified mixture of acrylic acid and methyl methacrylate, adjusting the pH value of the emulsion to 8 by using sodium bicarbonate solution after reacting for 2h at 60 ℃, and adding 0.25kg of mineral oil defoamer, 0.25kg of mildew preventive o-phenylphenol and a leveling agent after filtering to obtain the starch glue.
Example 2
The environment-friendly kraft paper starch glue of the embodiment is prepared by the following steps:
adding 500kg of corn starch raw material and 1500kg of water into a reaction kettle, raising the temperature to 60 ℃, heating and pasting, controlling the stirring speed to be 1000rpm, adding 50kg of silane coupling agent vinyl trimethoxy silane, cooling to 30 ℃ after reacting for 1h, adding 25kg of emulsifier polyoxyethylene 20 sorbitan monooleate and 5.0kg of initiator ceric ammonium nitrate-potassium persulfate, stirring for 30 min, dropwise adding 100kg of pre-emulsified mixture of methacrylic acid and methyl acrylate, adjusting the pH value of the emulsion to 7 by using sodium bicarbonate solution after reacting for 2h at 80 ℃, filtering, and adding 0.5kg of mineral oil defoamer, 0.5kg of mildew preventive o-phenyl phenol and a leveling agent to obtain the leveling agent.
Example 3
The environment-friendly kraft paper starch glue of the embodiment is prepared by the following steps:
adding 500kg of corn starch raw material and 1000kg of water into a reaction kettle, raising the temperature to 70 ℃, heating and pasting, controlling the stirring speed to be 800rpm, adding 40kg of silane coupling agent vinyl tris (β -methoxyethoxy) silane, reacting for 1h, then cooling to 20 ℃, adding 4.0kg of emulsifier monoglyceride and 20kg of initiator sodium bisulfite-ammonium persulfate, stirring for 20 minutes, dropwise adding 200kg of pre-emulsified butyl acrylate and acrylic acid-2-hydroxyethyl ester mixture, reacting for 2h at 70 ℃, adjusting the pH value of the emulsion to 8 by using sodium bicarbonate solution, filtering, and adding 0.4kg of mineral oil defoamer, 0.4kg of mildew preventive o-phenylphenol and a leveling agent to obtain the starch adhesive.
Example 4
The environment-friendly kraft paper starch glue of the embodiment is prepared by the following steps:
adding 500kg of corn starch raw material and 500kg of water into a reaction kettle, raising the temperature to 60 ℃, heating and pasting, controlling the stirring speed to be 900rpm, adding 45kg of silane coupling agent gamma-aminopropyltriethoxysilane, cooling to 40 ℃ after reacting for 1h, adding 4.0kg of emulsifier monoglyceride and 15kg of initiator ferrous sulfate-ammonium persulfate, stirring for 30 min, dropwise adding 150kg of pre-emulsified butyl acrylate and vinyl acetate mixture, adjusting the pH value of the emulsion to 7 by using sodium bicarbonate solution after reacting for 2h at 80 ℃, filtering, and adding 0.3kg of organic silicone oil defoamer, 0.3kg of mildew preventive 2-pyridinethiol-1-zinc oxide and a leveling agent to obtain the starch glue.
Example 5
The environment-friendly kraft paper starch glue of the embodiment is prepared by the following steps:
adding 500kg of corn starch raw material and 500kg of water into a reaction kettle, raising the temperature to 80 ℃, heating and pasting, controlling the stirring speed to be 1000rpm, adding 40kg of silane coupling agent gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, reducing the temperature to 40 ℃ after reacting for 1h, adding 4.0kg of emulsifier sucrose fatty acid ester and 15kg of initiator silver nitrate-potassium persulfate, stirring for 20 min, dropwise adding 150kg of pre-emulsified methyl methacrylate and acrylic acid-2-hydroxyethyl ester mixture, reacting for 2h at 80 ℃, adjusting the pH value of the emulsion to 8 by using sodium bicarbonate solution, filtering, and adding 0.25kg of polyether defoamer, 0.3kg of ammonium persulfate and leveling agent to obtain starch glue.
Example 6
The environment-friendly kraft paper starch glue of the embodiment is prepared by the following steps:
adding 500kg of corn starch raw material and 500kg of water into a reaction kettle, raising the temperature to 60 ℃, heating and pasting, controlling the stirring speed to be 800rpm, adding 40kg of silane coupling agent gamma-methacryloxypropyltrimethoxysilane, reducing the temperature to 30 ℃ after reacting for 1h, adding 2.5kg of emulsifier sucrose fatty acid ester and 5.0kg of initiator ceric ammonium nitrate-ammonium persulfate, stirring for 20 minutes, dropwise adding 250kg of pre-emulsified mixture of methyl acrylate and acrylic acid-2-hydroxyethyl ester, adjusting the pH value of the emulsion to 8 by using sodium bicarbonate solution after reacting for 2h at 60 ℃, filtering, and adding 0.25kg of polyether defoamer, 0.3kg of ammonium persulfate and a flatting agent to obtain the starch adhesive.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (8)
1. The preparation method of the environment-friendly kraft paper starch glue is characterized in that the starch glue is prepared by the following steps:
(1) adding starch raw materials and water into a reaction kettle, heating to 60-85 ℃, heating for gelatinization, controlling the stirring speed to be under 600-plus-material 1000rpm, adding a silane coupling agent, reacting for 1h, and cooling to below 40 ℃;
(2) adding an emulsifier and an initiator, and stirring for reaction for 10-30 minutes;
(3) and then dripping pre-emulsified acrylic acid derivatives in a continuous feeding mode, reacting for 2 hours at the temperature of 60-80 ℃, adjusting the pH value of the emulsion by using a sodium bicarbonate solution, filtering, and adding a defoaming agent, a mildew preventive and a flatting agent to obtain the starch glue.
2. The method for preparing the environment-friendly kraft paper starch glue according to claim 1, wherein the starch is one of corn starch, tapioca starch, barley starch and potato starch, and the weight ratio of the starch to the water is 1: 1 to 3.
3. The method for preparing the environment-friendly kraft paper starch glue according to claim 1, wherein the silane coupling agent is one of vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris (β -methoxyethoxy) silane, gamma-aminopropyltriethoxysilane, gamma- (2, 3-glycidoxy) propyltrimethoxysilane and gamma-methacryloxypropyltrimethoxysilane, and the amount of the silane coupling agent is 8-10% of the weight of the starch.
4. The method for preparing the environment-friendly kraft paper starch glue according to claim 1, wherein the initiator is one of ammonium ceric nitrate-ammonium persulfate, ammonium ceric nitrate-potassium persulfate, sodium bisulfite-ammonium persulfate, ferrous sulfate-ammonium persulfate, and silver nitrate-potassium persulfate, and the amount of the initiator is 1.0-5.0% of the weight of the starch.
5. The method for preparing the environment-friendly kraft paper starch gum according to claim 1, wherein the emulsifier is a nonionic emulsifier, and is one of sorbitan monooleate, polyoxyethylene 20 sorbitan monooleate, monoglyceride fatty acid ester and sucrose fatty acid ester, and the content of the emulsifier is 0.5-1% of the weight of the starch.
6. The method for preparing the environment-friendly kraft paper starch glue according to claim 1, wherein the pre-emulsified acrylic acid derivative is a mixture of two or more of methyl acrylate, methacrylic acid, acrylic acid, butyl acrylate, methyl methacrylate, vinyl acetate and 2-hydroxyethyl acrylate, and the amount of the pre-emulsified acrylic acid derivative is 20-50% of the weight of the starch.
7. The method for preparing the environment-friendly kraft paper starch glue according to claim 1, wherein the defoaming agent is one of a mineral oil defoaming agent, a silicone oil defoaming agent and a polyether defoaming agent, and the dosage of the defoaming agent is 0.05-0.1% of the weight of the starch.
8. The method for preparing the environment-friendly kraft paper starch glue according to claim 1, wherein the mildew inhibitor is one of o-phenylphenol, 2-pyridinethiol-1-zinc oxide and ammonium persulfate, and the dosage of the mildew inhibitor is 0.05-0.1% of the weight of the starch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010163537.5A CN111234110A (en) | 2020-03-10 | 2020-03-10 | Preparation method of environment-friendly kraft paper starch glue |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010163537.5A CN111234110A (en) | 2020-03-10 | 2020-03-10 | Preparation method of environment-friendly kraft paper starch glue |
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| CN111234110A true CN111234110A (en) | 2020-06-05 |
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| CN202010163537.5A Pending CN111234110A (en) | 2020-03-10 | 2020-03-10 | Preparation method of environment-friendly kraft paper starch glue |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114213587A (en) * | 2021-12-23 | 2022-03-22 | 东莞建泰生物科技有限公司 | Starch modification method and application thereof in degradable plastics |
| CN114411451A (en) * | 2021-04-28 | 2022-04-29 | 罗嘉瑜 | Novel papermaking method and equipment |
| CN115093615A (en) * | 2022-06-27 | 2022-09-23 | 江西省科学院应用化学研究所 | Starch-based biodegradable elastomer and preparation method thereof |
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| CN107793968A (en) * | 2017-10-25 | 2018-03-13 | 成都纽兰晶茂商贸有限公司 | A kind of preparation method of wood materials environment-friendly type water base adhesive |
| CN109266265A (en) * | 2018-09-14 | 2019-01-25 | 江南大学 | A kind of thermosetting property wood-based plate starch adhesive and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411451A (en) * | 2021-04-28 | 2022-04-29 | 罗嘉瑜 | Novel papermaking method and equipment |
| CN114213587A (en) * | 2021-12-23 | 2022-03-22 | 东莞建泰生物科技有限公司 | Starch modification method and application thereof in degradable plastics |
| CN114213587B (en) * | 2021-12-23 | 2024-03-01 | 东莞建泰生物科技有限公司 | Starch modification method and application of starch modification method in degradable plastic |
| CN115093615A (en) * | 2022-06-27 | 2022-09-23 | 江西省科学院应用化学研究所 | Starch-based biodegradable elastomer and preparation method thereof |
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