CN107142051A - A kind of wood adhesive using starch as raw material - Google Patents

A kind of wood adhesive using starch as raw material Download PDF

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Publication number
CN107142051A
CN107142051A CN201710230591.5A CN201710230591A CN107142051A CN 107142051 A CN107142051 A CN 107142051A CN 201710230591 A CN201710230591 A CN 201710230591A CN 107142051 A CN107142051 A CN 107142051A
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parts
starch
adhesive
water
raw material
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CN201710230591.5A
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薛忠来
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J151/00Adhesives 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
    • C09J151/02Adhesives 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
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F251/00Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/04Non-macromolecular additives inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/06Non-macromolecular additives organic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08Macromolecular additives
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention discloses a kind of wood adhesive using starch as raw material, include the composition of raw materials component of following mass fraction:80 100 parts of starch, 13 parts of buffers, 12 18 parts of oxidants, 5 12 parts of polyvinyl alcohol, 4 10 parts of NMAs, 8 12 parts of bentonites, 12 20 parts of boraxs, 58 parts of agar, 8 15 parts of glycerine, 120 300 parts of water, 0.5 3 parts of sodium hydroxides.Wood adhesive of the present invention using starch as raw material, compared with common adhesives, its caking property, stability are obviously improved, and can preferably be applied to wood bonding, and bonding force is strong, and the timber-work being bonded discharges without toxic and harmful gas.

Description

A kind of wood adhesive using starch as raw material
Technical field
The invention belongs to technical field of adhesive preparation, and in particular to be a kind of wood adhesive using starch as raw material.
Background technology
Increasingly attention with people to household environment-friendlywater condition, for VOC gases, the You Jirong discharged in furniture Agent etc. it is also proposed increasingly harsher requirement, in the adhesive of traditional furniture, organic solvent all be carried substantially, these are molten Being difficult of agent discharges completely in a short time, and constantly slow for a long time can outwards produce, the healthy production that this will be to people Raw influence.Amylan is applicating history the longest one kind as natural adhesive, there is raw material to be easy to get due to it, price Cheap, corrosion-free, pollution-free, intensity is higher, lightweight, it is easy to use the advantages of, consumption is more and more big.External current research Direction is to improve its water resistance and adhesive strength, such as adds the improvement that polyvinyl alcohol, urea carry out these performances, is widely used in The bonding of corrugated case, paper, bafta, trade mark, envelope etc..The preparation method of starch adhesive has a variety of, mainly there is gelatinization Method, oxidizing process, esterification, etherification method and with other high polymer monomer grafting copolymerization processes, because ative starch relative molecular mass is larger, The degree of polymerization is higher, and mobility and permeability are poor, and the inner molecular structure of starch must be disintegrated during as adhesive, drop Solution method mainly has thermal degradation, biodegradable, acid degradation and oxidative degradation etc., chemical property more active hydroxyl in starch molecule Base and glycosidic bond are easily by various oxidizing, and hydroxyl is oxidized in aldehyde radical, ketone group, carboxyl, molecule under different conditions Glycosidic bond part be broken, make the starch molecule degree of polymerization reduction, the starch after oxidation is the degree of polymerization containing aldehyde radical and carboxyl The mixture of low modified starch, heated gelatinization or room temperature in the presence of oxidant are gelatinized and oxygen are made this starch with water Change starch adhesive.But the production of starch-base timber adhesive and performance especially water resistance, adhesive strength and steady It is qualitative to fail to be better to improve.
The content of the invention
The invention aims to overcome deficiency of the prior art, there is provided a kind of wood-gluing using starch as raw material Agent.
To solve the above problems, the technical solution used in the present invention is as follows:
A kind of wood adhesive using starch as raw material, includes the composition of raw materials component of following mass fraction:
80-100 parts of starch, 1-3 parts of buffers, 12-18 parts of oxidants, 5-12 parts of polyvinyl alcohol, 4-10 parts of methylol acryloyls Amine, 8-12 part bentonite, 12-20 parts of boraxs, 5-8 parts of agar, 8-15 parts of glycerine, 120-300 parts of water, 0.5-3 parts of sodium hydroxides.
Preferably, the composition of raw materials component of following mass fraction is included:90 parts of starch, 3 parts of buffers, 16 parts of oxidants, 10 parts of polyvinyl alcohol, 8 parts of NMAs, 9 parts of bentonites, 15 parts of boraxs, 6 parts of agar, 10 parts of glycerine, 200 parts of water, 1 Part sodium hydroxide.
Compared with prior art, beneficial effects of the present invention are as follows by the present invention:
Wood adhesive of the present invention using starch as raw material, compared with common adhesives, caking property, stability are obtained To being obviously improved, wood bonding can be preferably applied to, bonding force is strong, and the timber-work being bonded is without toxic and harmful gas Release.
Embodiment
Illustrate present disclosure below in conjunction with specific embodiments.
A kind of wood adhesive using starch as raw material, includes the composition of raw materials component of following mass fraction:80-100 parts Starch, 1-3 part buffer, 12-18 parts of oxidants, 5-12 parts of polyvinyl alcohol, 4-10 parts of NMAs, 8-12 parts of swellings Soil, 12-20 parts of boraxs, 5-8 parts of agar, 8-15 parts of glycerine, 120-300 parts of water, 0.5-3 parts of sodium hydroxides.
Be glued, including bonding, bonding, it is cementing, gluing, refer to that homogeneity or heterogeneous body surface are linked together with adhesive Technology, lightweight, or sealing, most technological temperature low features, because adhesive bonding technique especially fit continuous with stress distribution For the connection of unlike material, different-thickness, ultra-thin specification and complex component, so adhesive with fastest developing speed, application industry It is extremely wide, and have significant impact to high-and-new science and technology progress and people's daily life improvement.
80-100 parts of starch are added by the composition of raw materials component of mass fraction, are a kind of white powders, insoluble in cold water, Starch granules can expand in hot water, and some starch dissolution is in water, and another part is suspended in water, form colloidal starch Paste, amylan can be applicating history the longest one kind as natural adhesive in addition, there is raw material to be easy to get because of it, valency Lattice are cheap, corrosion-free, pollution-free, intensity is higher, it is lightweight, easy to use the advantages of, consumption is more and more big, the starch after oxidation Oxidized starch adhesive can be made, adhesive strength is higher, and color is glossy;Starch can not be added excessively, otherwise can cause group Into the easy coagulative precipitation of composition, it is difficult to be oxidized, or even rotten, starch can not also add very few, can influence adhesive strength.
1-3 parts of buffers are added by the composition of raw materials component of mass fraction, the buffer is phosphate and borate Mixture, can be used under control high-temperature high-pressure state, or under normal temperature and pressure, the solid compositions of gas or liquid fugacity are played Stable pH value and the effect for keeping stable system, and its pH adjustable range can be increased, by the composition of raw materials group of mass fraction Divide and add 0.5-3 parts of sodium hydroxides, sodium hydroxide is soluble in water, can be configured to sodium hydroxide solution, body can be adjusted PH in system, and provide alkaline environment for starch gelatinization.
12-18 parts of oxidants are added by the composition of raw materials component of mass fraction, the oxidant is sodium perborate and crosses boron The mixture of sour potassium, the effect of single-oxidizer is substantially better than using adhesive made from composite oxidant, and can also carry The content of high boron element, it is possible to increase the heat resisting temperature of adhesive, and then its heat endurance is improved, oxidant can be by starch point Chemical property more active hydroxyl and glycosidic bond are easily oxidized in son, and hydroxyl is oxidized in aldehyde radical, ketone group, carboxyl, molecule Glycosidic bond part be broken, make the starch molecule degree of polymerization reduction, the starch after oxidation is the degree of polymerization containing aldehyde radical and carboxyl The mixture of low modified starch, heated gelatinization or room temperature in the presence of oxidant are gelatinized and oxygen are made this starch with water Change starch adhesive, oxidant is excessive or very few can influence the concentration and viscosity of adhesive.
5-12 parts of polyvinyl alcohol are added by the composition of raw materials component of mass fraction, polyvinyl alcohol is used as changing for starch adhesive Property agent, with long-chain polyhydric alcohol, can be esterified, be etherified, the chemical reactivity such as acetalation, nontoxic, stingless to human body skin Swash property, additionally it is possible to improve viscosity, the amount of the polyvinyl alcohol added will control proper, otherwise can influence the viscosity of adhesive, enter And the gluing degree of adhesive and timber can be influenceed, influence the outward appearance of product.
4-10 parts of NMAs and 12-20 parts of boraxs, methylol are added by the composition of raw materials component of mass fraction There is the methylol of the double bond being conjugated with carbonyl and rich reactivity, i.e. NMA contains not in acrylamide molecules The polyfunctional monomer of saturation, can be used in the presence of oxygen, heat as crosslinking agent, be widely used in the modified resin of fiber, added Work dyestuff, plastic binder, soil stabilizer etc., NMA is also as thickener, for increasing liquid phase denseness, mistake The viscosity and lubricity of many or very few influence adhesive;Boron is not rare element in China, but high yield element, and borax is also made For crosslinking agent, in addition, borax has antibacterial, anti-corrosion and protects the effect of skin and mucosa, the use time of adhesive can be extended, And it is harmless, service life so as to prolonging wood product and harm, methylol third will not be produced to human body Reaction can improve the effect of crosslinking jointly for acrylamide and borax.
Bentonite is a kind of claystone, and 8-12 parts of bentonites, bentonite tool are added by the composition of raw materials component of mass fraction There is a strong hygroscopicity and dilatancy, adsorbable eight to fifteenfold own vol water, volumetric expansion is up to several times to 30 Times, can be cost-effective with good stability, increase utilization rate;As a form of gel and suspension can be dispersed into aqueous medium, So that adhesive has certain viscosity, thixotropy and lubricity;Its admixture with water, mud or fine sand have plasticity and The admixture of cohesiveness, i.e. bentonite and borax has plasticity and cohesiveness;In addition, also there is certain adsorptivity, can The purpose of reduction leak-off rate is reached, the stability of system is improved.
Emulsifying agent can improve the various surface tension constituted between phase in emulsion, be allowed to form uniform and stable disperse The material of system or emulsion, emulsifying agent is in a kind of surface reactive material, molecule while having hydrophilic group and lipophilic group, and it gathers Collection can reduce interfacial tension and reduce the energy formed required for emulsion, so as to improve emulsion on oil/water interface Energy;5-8 parts of agar are added by the composition of raw materials component of mass fraction, agar is in addition to it may be used as emulsifying agent, also with solidifying Solidity, stability can be used as thickener, coagulator, suspending agent and stabilizer, be soluble in boiling water, and dilution is still protected at 42 DEG C Liquid is held, but congeals at 37 DEG C close jelly, it is not stratified, the features such as be not demulsified, and good water solubility, agar is also as auxiliary Fining agent, accelerates and improves clarification, very few to influence clarification degree, can excessively influence emulsification degree and produce a large amount of bubbles, Influence is used.
Glycerine is the clear and bright thick liquid of no color or smell taste sweet tea, sweet by 8-15 parts of the composition of raw materials component addition of mass fraction Oil, glycerine can be used as solvent, lubricant, when 66.7% glycerine freezing point highest, i.e. temperature are -46.5 DEG C, glycerine water solution content For 66.7%, therefore glycerine also acts as antifreezing agent, it is to avoid adhesive freezes influence and used.
Preparation process is as follows:
(1)Water is first added in stirred tank, 60-75 DEG C is warming up to, preheating can reduce the reaction time, accelerates reaction speed;
(2)Starch, buffer, oxidant, polyvinyl alcohol, sodium hydroxide, reaction are added by the composition of raw materials component of mass fraction 60-75 DEG C of temperature, reaction time 1-2.5h, reaction solution pH8-9.5, is stirred continuously to uniform so that starch is aoxidized, and And the starch after oxidation can be fully gelatinized in alkaline system environment, and then oxidized starch adhesive is made;
(3)NMA, borax, agar, glycerine are added by the composition of raw materials component of mass fraction, is stirred continuously to equal It is even, 55-65 DEG C of reaction temperature, emulsion mixture is made in reaction time 1-1.5h, with certain cohesive, plasticity;
(4)50-60 DEG C are cooled to, insulation reaction 1-1.5h stirs so that added material is well mixed, increase starch The stability and adhesive strength of adhesive;
(5)55-65 DEG C are warming up to, bentonite is added by the composition of raw materials component of mass fraction, stirs, 20- to be mixed It is well mixed after 30 min, forms finished product, dramatically improve glued membrane adhesive force, glued membrane water resistance and heat resistance is improved, with very Good stability, outward appearance also can be improved significantly.
【Embodiment one】A kind of wood adhesive using starch as raw material, includes the composition of raw materials group of following mass fraction Point:80 parts of starch, 1 part of buffer, 12 parts of oxidants, 5 parts of polyvinyl alcohol, 10 parts of NMAs, 10 parts of bentonites, 15 Part borax, 5 parts of agar, 15 parts of glycerine, 150 parts of water, 1 part of sodium hydroxide.
Preparation process is as follows:
(1)100 parts of water is first added in stirred tank, 60 DEG C are warming up to;
(2)Add 80 parts of starch, 1 part of buffer, 12 parts of oxidants, 5 parts of polyvinyl alcohol, 1 part of sodium hydroxide, reaction temperature 65 DEG C, reaction time 1.5h, reaction solution pH8.5 stir;
(3)10 parts of NMAs, 15 parts of boraxs, 5 parts of agar, 15 parts of glycerine are added, are stirred, reaction temperature 60 DEG C, reaction time 1h;
(4)50 DEG C are cooled to, insulation reaction 1h stirs;
(5)55 DEG C are warming up to, 10 parts of bentonites, and remaining 50 parts of water is added, stirs, mixed after 30 min to be mixed Uniformly, finished product is formed.
【Embodiment two】A kind of wood adhesive using starch as raw material, includes the composition of raw materials group of following mass fraction Point:90 parts of starch, 3 parts of buffers, 16 parts of oxidants, 10 parts of polyvinyl alcohol, 8 parts of NMAs, 9 parts of bentonites, 15 Part borax, 6 parts of agar, 10 parts of glycerine, 200 parts of water, 1 part of sodium hydroxide.
Preparation process is as follows:
(1)150 parts of water is first added in stirred tank, 65 DEG C are warming up to;
(2)Add 90 parts of starch, 3 parts of buffers, 16 parts of oxidants, 10 parts of polyvinyl alcohol, 1 part of sodium hydroxide, reaction temperature 70 DEG C, reaction time 2h, reaction solution pH9.0 stir;
(3)8 parts of NMAs, 15 parts of boraxs, 6 parts of agar, 10 parts of glycerine are added, are stirred, 60 DEG C of reaction temperature, Reaction time 1.2h;
(4)50 DEG C are cooled to, insulation reaction 1.2h stirs;
(5)60 DEG C are warming up to, 9 parts of bentonites, and remaining 50 parts of water is added, stirs, mixed after 25 min to be mixed Uniformly, finished product is formed.
【Embodiment three】A kind of wood adhesive using starch as raw material, includes the composition of raw materials group of following mass fraction Point:100 parts of starch, 3 parts of buffers, 18 parts of oxidants, 8 parts of polyvinyl alcohol, 10 parts of NMAs, 8 parts of bentonites, 18 parts of boraxs, 5 parts of agar, 12 parts of glycerine, 300 parts of water, 2 parts of sodium hydroxides.
Preparation process is as follows:
(1)200 parts of water is first added in stirred tank, 75 DEG C are warming up to;
(2)Add 100 parts of starch, 3 parts of buffers, 18 parts of oxidants, 8 parts of polyvinyl alcohol, 2 parts of sodium hydroxides, reaction temperature 75 DEG C, reaction time 2.5h, reaction solution pH9.5 stir;
(3)10 parts of NMAs, 18 parts of boraxs, 5 parts of agar, 12 parts of glycerine are added, are stirred, reaction temperature 65 DEG C, reaction time 1.5h;
(4)60 DEG C are cooled to, insulation reaction 1.5h stirs;
(5)65 DEG C are warming up to, 8 parts of bentonites, and remaining 100 parts of water is added, stirs, mixed after 30 min to be mixed Uniformly, finished product is formed.
Experiment is compared with the wood adhesive and common adhesives of above-described embodiment one, two, three below, plank is entered Row gluing, and be all divided into 5 × 5 grid, with using the plank of the wood adhesive gluing of embodiment one, two, three and The plank of common adhesives gluing is used for one group, every group is tested at a temperature of 50 DEG C, 80 DEG C, 100 DEG C respectively, after 48h The number of squares of remaining gluing on plank is calculated, experimental data is as follows:
Thus experimental result can be drawn:Wood adhesive of the present invention using starch as raw material, with common adhesives phase Compare, the number of squares of remaining gluing is significantly more than common adhesives on the plank at a temperature of 50 DEG C, 80 DEG C, 100 DEG C, bonds Property, stability be obviously improved, can preferably be applied to wood bonding, bonding force is strong, and the timber-work being bonded Without toxic and harmful gas release.
Above content is made for the present invention in conjunction with specific embodiments describes in detail, it is impossible to assert that the present invention is specific real Apply and be only limitted to these explanations.For those skilled in the art, before present inventive concept is not departed from Put, some simple deduction or replace can also be made, the scope of protection of the invention should be all considered as belonging to.

Claims (2)

1. a kind of wood adhesive using starch as raw material, it is characterised in that include the composition of raw materials component of following mass fraction:
80-100 parts of starch, 1-3 parts of buffers, 12-18 parts of oxidants, 5-12 parts of polyvinyl alcohol, 4-10 parts of methylol acryloyls Amine, 8-12 part bentonite, 12-20 parts of boraxs, 5-8 parts of agar, 8-15 parts of glycerine, 120-300 parts of water, 0.5-3 parts of sodium hydroxides.
2. a kind of wood adhesive using starch as raw material as claimed in claim 1, it is characterised in that including following mass parts Several composition of raw materials components:90 parts of starch, 3 parts of buffers, 16 parts of oxidants, 10 parts of polyvinyl alcohol, 8 parts of methylol acryloyls Amine, 9 parts of bentonites, 15 parts of boraxs, 6 parts of agar, 10 parts of glycerine, 200 parts of water, 1 part of sodium hydroxide.
CN201710230591.5A 2017-04-11 2017-04-11 A kind of wood adhesive using starch as raw material Pending CN107142051A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110964467A (en) * 2019-12-24 2020-04-07 彭敏 High-strength adhesive for corrugated board and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101475790A (en) * 2008-01-04 2009-07-08 杨光 Novel timber adhesive and preparation thereof
CN102585736A (en) * 2012-01-12 2012-07-18 浙江顶立胶业有限公司 Hot-pressing veneer adhesive and preparation method thereof
CN102850957A (en) * 2012-08-30 2013-01-02 苏州市德莱尔建材科技有限公司 Preparation method for wood adhesive with starch as raw material
CN103834129A (en) * 2012-11-22 2014-06-04 苏斌 Green and environment friendly powdery building glue powder
CN104004478A (en) * 2014-06-07 2014-08-27 东莞建泰生物科技有限公司 Method for fabricating acidolysis acetylated starch adhesive and application of acidolysis acetylated starch adhesive

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101475790A (en) * 2008-01-04 2009-07-08 杨光 Novel timber adhesive and preparation thereof
CN102585736A (en) * 2012-01-12 2012-07-18 浙江顶立胶业有限公司 Hot-pressing veneer adhesive and preparation method thereof
CN102850957A (en) * 2012-08-30 2013-01-02 苏州市德莱尔建材科技有限公司 Preparation method for wood adhesive with starch as raw material
CN103834129A (en) * 2012-11-22 2014-06-04 苏斌 Green and environment friendly powdery building glue powder
CN104004478A (en) * 2014-06-07 2014-08-27 东莞建泰生物科技有限公司 Method for fabricating acidolysis acetylated starch adhesive and application of acidolysis acetylated starch adhesive

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110964467A (en) * 2019-12-24 2020-04-07 彭敏 High-strength adhesive for corrugated board and preparation method thereof

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Application publication date: 20170908