CN-121975460-A - Double-component water-based instant adhesive and preparation method thereof

Abstract

The invention discloses a double-component water-based instant adhesive and a preparation method thereof, wherein the double-component water-based instant adhesive comprises, by weight, 4.0-4.5 parts of polyvinyl alcohol, 0.1-0.2 part of sodium bicarbonate, 0.15-0.2 part of ammonium persulfate, 0.1-0.2 part of BYK024 defoamer, 25.0-26.0 parts of vinyl acetate, 8.0-9.0 parts of functional crosslinking monomer, 1.0-1.5 parts of methacrylic acid, 0.12-0.15 part of neoprene 1.0-1.5,TEGO Dispers 610S dispersant, 10.0-11.0 parts of calcium carbonate, 0.1-0.12 part of sodium benzoate, 50.43-45.63 parts of water, 7.0 parts of curing agent, 0.6 part of accelerator, 1.0 part of catalyst and 91.4 parts of water. The double-component water-based instant adhesive can realize instant adhesion and is harmless to human bodies and the environment.

Inventors

• LIU WEIJUN
• QI ZHIWEI
• ZHOU YANG
• QI ZHUORAN
• LU ZHONGXIN
• ZHAO SONGLIN

Assignees

• 台州学院
• 杭州万海新材料科技有限公司

Dates

Publication Date

20260505

Application Date

20260323

Claims (8)

1. 1. The double-component water-based instant adhesive comprises A, B components, wherein A, B components are respectively coated on a base material when in use, and then pressed to realize instant adhesion, and is characterized in that A, B components consist of the following components in parts by weight: A component: 4.0 to 4.5 portions of polyvinyl alcohol Sodium bicarbonate 0.1-0.2 Ammonium persulfate 0.15-0.2 BYK024 0.1-0.2 25.0 To 26.0 portions of vinyl acetate Functional crosslinking monomer 8.0-9.0 Methacrylic acid 1.0-1.5 Neoprene 1.0-1.5 TEGO Dispers 610S 0.12-0.15 10.0 To 11.0 percent of calcium carbonate Sodium benzoate 0.1-0.12 Water 50.43-45.63 And the component B comprises the following components: 7.0 parts of curing agent Accelerator 0.6 Catalyst 1.0 91.4 Parts of water.
2. 2. The two-component water-based instant adhesive of claim 1, wherein the polyvinyl alcohol is one or a mixture of two or more of PVA17-88, gao Xiannuo mol TM AL-06R and Gao Xian LiwangZE-210 according to any proportion.
3. 3. The two-component water-based instant adhesive of claim 1 wherein the functional crosslinking monomer is acetoacetoxyethyl methacrylate.
4. 4. The two-part water-based transient adhesive of claim 1, wherein said neoprene is CR2441.
5. 5. The two-component water-based instant adhesive of claim 1, wherein the curing agent is one or a mixture of more than two of adipic acid dihydrazide, ZIRCOZOL ZC-2 and SAFELINKTM SPM-01 according to any proportion.
6. 6. The two-part water-based transient adhesive of claim 1, wherein the accelerator is dimethylaminopyridine.
7. 7. The two-component water-based instant adhesive according to claim 1, wherein the catalyst is stannous oxalate.
8. 8. A method of preparing a two-component water-based transient adhesive according to any one of claims 1 to 7, comprising the steps of: (1) Dissolving 0.15-0.2 weight part of ammonium persulfate in 3.6-4.8 weight parts of water to obtain 3.75-5.0 weight parts of initiator solution, mixing 22.9-23.72 weight parts of vinyl acetate, 1.0-1.5 weight parts of methacrylic acid and 8.0-9.0 weight parts of functional crosslinking monomer, stirring uniformly to obtain mixed monomer solution, cutting 1.0-1.5 weight parts of chloroprene rubber into small blocks, adding the small blocks into the mixed monomer solution, dissolving and stirring uniformly to form 32.9-35.72 weight parts of mixed monomer, adding 3 weight parts of water, 0.12-0.15 weight parts of dispersing agent TEGO Dispers 610S and 10.0-11.0 weight parts of calcium carbonate into another device, and stirring and dispersing into 13.12-14.15 weight parts of calcium carbonate slurry; (2) Adding 43.83-37.83 parts by weight of water, 0.05-0.15 parts by weight of defoamer BYK024 and 0.1-0.2 parts by weight of buffer sodium bicarbonate into a reaction kettle, starting stirring, adding 4.0-4.5 parts by weight of polyvinyl alcohol, heating to 90-92 ℃ and preserving heat for 50-60 minutes until the polyvinyl alcohol is completely dissolved, then cooling to 55-60 ℃, adding 2.1-2.28 parts by weight of vinyl acetate and 1.125-1.5 parts by weight of initiator solution prepared in the step (1), and stirring and heating to 74-77 ℃; (3) Dropwise adding 32.9-35.72 parts by weight of the mixed monomer prepared in the step (1) after no reflux in a condenser, simultaneously adding 0.3-0.375 part by weight of the initiator solution prepared in the step (1) into a reaction kettle every 30-35 minutes, controlling the mixed monomer to be completely dripped within 4 hours, preserving heat for 15-20 minutes after the mixed monomer is completely dripped, heating to 82-85 ℃, adding the initiator solution prepared in the rest step (1), preserving heat for 50-55 minutes, cooling to below 50 ℃, adding 0.1-0.12 part by weight of sodium benzoate, 13.12-14.15 parts by weight of the calcium carbonate slurry prepared in the step (1) and 0.05 part by weight of BYK024, vacuumizing while cooling, and discharging after 20 minutes to obtain a component A of the two-component water-based instantaneous adhesive; (4) The preparation of the B component aqueous solution, namely adding 91.4 parts by weight of water, 7.0 parts by weight of curing agent, 0.6 parts by weight of accelerator and 1.0 part by weight of catalyst into a device, and uniformly stirring to obtain the B component of the double-component water-based instant adhesive.

Description

Double-component water-based instant adhesive and preparation method thereof Technical Field The invention relates to an adhesive preparation technology, in particular to a double-component water-based instant adhesive and a preparation method thereof. Background The water-based polyvinyl acetate adhesive is one of the environment-friendly adhesive varieties with the highest application and the highest dosage at present. It is prepared by emulsion polymerization with water as a dispersion medium, and is an aqueous environment-friendly adhesive. The adhesive has the characteristics of good film forming property, high bonding strength, high curing speed, good dilute acid and dilute alkali resistance, convenient use, low price, no organic solvent and the like, is widely applied to industries of wood, furniture, decoration, printing, spinning, leather, papermaking and the like, and is an environment-friendly adhesive. However, in the process of splicing wood, the curing speed is low, and the next process can be carried out after the bonding for more than ten hours under the action of certain pressure, so that the energy and equipment utilization rate are greatly wasted, and the production efficiency is low. The instant adhesive is suitable for mechanical and automatic operation, can greatly improve labor productivity, improve labor conditions, improve product quality and qualification rate, and reduce production cost, so the instant adhesive is an ideal connecting material with energy conservation, low consumption and low pollution. The instant adhesive used in wood industry is urea-formaldehyde resin, rubber paste, isocyanate compound, etc. The contact rubber paste has poor initial adhesion except the contact rubber paste, and the contact rubber paste contains an organic solvent, must be used in a closed place, is toxic, has fire hazard, and is easy to age. Thus, there is a need for an adhesive that is aqueous and has a strong initial tackiness. Disclosure of Invention Aiming at the problems, the invention aims to provide a double-component water-based instant adhesive and a preparation method thereof, which have extremely fast initial adhesion, take water as a dispersion medium and are environment-friendly and safe. The invention aims at realizing the technical scheme that the double-component water-based instant adhesive comprises A, B components, A, B components are respectively coated on a base material when in use, and then are pressed, so that the instant adhesive has higher adhesive strength, the next procedure can be performed, the working efficiency is improved, and the A, B components consist of the following components in parts by weight: A component: 4.0 to 4.5 portions of polyvinyl alcohol Sodium bicarbonate 0.1-0.2 Ammonium persulfate 0.15-0.2 BYK024 0.1-0.2 25.0 To 26.0 portions of vinyl acetate Functional crosslinking monomer 8.0-9.0 Methacrylic acid 1.0-1.5 Neoprene 1.0-1.5 TEGO Dispers 610S 0.12-0.15 10.0 To 11.0 percent of calcium carbonate Sodium benzoate 0.1-0.12 Water 50.43-45.63 And the component B comprises the following components: 7.0 parts of curing agent Accelerator 0.6 Catalyst 1.0 91.4 Parts of water. Further, the polyvinyl alcohol is one or a mixture of two or more of PVA17-88, gao Xiannuo mol TM AL-06R and Gao Xian LiwangZ210 according to any proportion. Further, the functional crosslinking monomer is acetoacetoxyethyl methacrylate. Further, the neoprene is CR2441. Further, the curing agent is one or a mixture of more than two of adipic acid dihydrazide, ZIRCOZOL ZC-2 and SAFELINKTM SPM-01 according to any proportion. Further, the accelerator is dimethylaminopyridine. Further, the catalyst is stannous oxalate. The invention also provides a preparation method of the double-component water-based instant adhesive, which comprises the following steps: (1) Dissolving 0.15-0.2 weight part of ammonium persulfate in 3.6-4.8 weight parts of water to obtain 3.75-5.0 weight parts of initiator solution, mixing 22.9-23.72 weight parts of vinyl acetate, 1.0-1.5 weight parts of methacrylic acid and 8.0-9.0 weight parts of functional crosslinking monomer, stirring uniformly to obtain mixed monomer solution, cutting 1.0-1.5 weight parts of chloroprene rubber into small blocks, adding the small blocks into the mixed monomer solution, dissolving and stirring uniformly to form 32.9-35.72 weight parts of mixed monomer, adding 3 weight parts of water, 0.12-0.15 weight parts of dispersing agent TEGO Dispers 610S and 10.0-11.0 weight parts of calcium carbonate into another device, and stirring and dispersing into 13.12-14.15 weight parts of calcium carbonate slurry; (2) Adding 43.83-37.83 parts by weight of water, 0.05-0.15 parts by weight of defoamer BYK024 and 0.1-0.2 parts by weight of buffer sodium bicarbonate into a reaction kettle, starting stirring, adding 4.0-4.5 parts by weight of polyvinyl alcohol, heating to 90-92 ℃ and preserving heat for 50-60 minutes until the polyvinyl alcohol is complet