Emulsion for water-based two-component wood splice adhesive and preparation method of emulsion

Abstract

The invention discloses emulsion which is prepared for a water-based two-component wood splice adhesive by taking carboxylated styrene-butadiene emulsion as a seed. The emulsion is prepared from the styrene-butadiene emulsion, a defoaming agent, a buffering agent, polyvinyl alcohol, a reactive emulsifier, an initiator, methacrylic acid, vinyl acetate, vinyl versatate, a functional monomer, a self-cross linking monomer, a preservative and the like. According to the emulsion for the wood splice adhesive, carboxylated styrene-butadiene is taken as the seed emulsion, flexible chains are introduced into emulsion particles, and therefore the anti-cracking property of the emulsion for the wood splice adhesive is improved; water is taken as a dispersion medium, use is convenient, no pollution is generated to the environment, after compounding is conducted, a polyisocyanate curing agent is added to prepare the two-component wood splice adhesive, and the functional monomer-primary hydroxyl group and the polyisocyanate curing agent in the emulsion achieve bridging, so that the strength and the water resistance are improved.

Description

technical field

[0001] The invention relates to an adhesive preparation technology, in particular to a water-based two-component jigsaw glue emulsion and a preparation method thereof. Background technique

[0002] In order to make full use of various kinds of wood and reduce waste, a wood reprocessing industry has been formed over the years by combining small wood into large wood. In the process of piecing small wood into large wood, a large amount of jigsaw glue is needed. The jigsaw glue is composed of water-based polymers containing active hydrogen, such as water-based vinyl resins such as polyvinyl alcohol aqueous solution, polyvinyl acetate emulsion, acrylic emulsion, etc. - Isocyanate Adhesive API (Aqueous emulsion Polymer Isocyanate). API has excellent adhesive properties and fracture toughness, good water resistance, heat resistance, not easy to age, does not contain formaldehyde, phenol and other harmful substances, and the pH value is close to neutral, no polluti...

Examples

Embodiment 1

[0019] Recipe: total amount = 1000kg

[0020] PVA1788

25kg

PVA0588

8kg

Methacrylate

4kg

Carboxybutylbenzene DL 264PA

200kg

vinyl acetate

290kg

BYK024

1kg

tertiary ethylene carbonate

23kg

Sodium acetate

1kg

4-HBA

15kg

EXG-202

10kg

NMA - 48%

6kg

Ammonium persulfate

0.5kg

LEX fungicide

1kg

Sodium thiosulfate

0.1kg

water

415.4kg

[0021] Production Process:

[0022] A, 0.5kg ammonium persulfate is dissolved in 19.5kg water to obtain 20kg ammonium persulfate solution, 0.1kg sodium thiosulfate is dissolved in 0.9kg water to obtain 1kg sodium thiosulfate solution; 6kg NMA is dispersed in 14kg water to obtain 20kg NMA aqueous solution; 290kg vinyl acetate, 23kg tertiary vinyl carbonate, 15kg4-HBA and 4kg methacrylic acid are added to the monomer tank to mix and stir to make 332kg mixed monomers;

[0023] B, remaining water is ad...

Embodiment 2

[0026] Embodiment two formulas: total amount=1000kg

[0027] PVA1792

30kg

PVA0588

4kg

Methacrylate

4kg

Carboxybutylbenzene DL 264PA

205kg

vinyl acetate

295kg

BYK024

1.1kg

tertiary ethylene carbonate

26kg

Sodium acetate

1.1kg

4-HBA

17kg

EXG-202

11kg

NMA - 48%

6kg

Ammonium persulfate

0.5kg

LEX fungicide

1.1kg

Sodium thiosulfate

0.1kg

water

398.1kg

[0028] Production Process:

[0029] A, 0.5kg ammonium persulfate is dissolved in 19.5kg water to obtain 20kg ammonium persulfate solution, 0.1kg sodium thiosulfate is dissolved in 0.9kg water to obtain 1kg sodium thiosulfate solution; 6kg NMA is dispersed in 14kg water to obtain 20kg NMA aqueous solution; 295kg of vinyl acetate, 26kg of tertiary vinyl carbonate, 17kg of 4-HBA and 4kg of methacrylic acid are added to the monomer tank to mix and stir to make 342kg of mixed monome...

Embodiment 3

[0034] Recipe: total amount = 1000kg

[0035] PVA1788

24kg

PVA0588

12kg

Methacrylate

5kg

Carboxybutylbenzene DL 392PA

210kg

vinyl acetate

300kg

BYK024

1.2kg

tertiary ethylene carbonate

29kg

Sodium acetate

1.2kg

4-HBA

18kg

EXG-202

12kg

NMA - 48%

7kg

Ammonium persulfate

0.6kg

LEX fungicide

1.2kg

Sodium thiosulfate

0.2kg

water

378.6kg

[0036] Production Process:

[0037]a, 0.6kg ammonium persulfate is dissolved in 19.4kg water, obtains 20kg ammonium persulfate solution, 0.2kg sodium thiosulfate is dissolved in 0.8kg water, obtains 1kg sodium thiosulfate solution; 7kgNMA is dispersed in 13kg water, obtains 20kg of NMA aqueous solution; 300kg of vinyl acetate, 29kg of tertiary vinyl carbonate, 18kg of 4-HBA and 5kg of methacrylic acid were added to the monomer tank and mixed evenly to make 352kg of mixed monomer;

[0038] b...

technical field

[0001] The invention relates to an adhesive preparation technology, in particular to a water-based two-component jigsaw glue emulsion and a preparation method thereof. Background technique

[0002] In order to make full use of various kinds of wood and reduce waste, a wood reprocessing industry has been formed over the years by combining small wood into large wood. In the process of piecing small wood into large wood, a large amount of jigsaw glue is needed. The jigsaw glue is composed of water-based polymers containing active hydrogen, such as water-based vinyl resins such as polyvinyl alcohol aqueous solution, polyvinyl acetate emulsion, acrylic emulsion, etc. - Isocyanate Adhesive API (Aqueous emulsion Polymer Isocyanate). API has excellent adhesive properties and fracture toughness, good water resistance, heat resistance, not easy to age, does not contain formaldehyde, phenol and other harmful substances, and the pH value is close to neutral, no polluti...

Examples

Embodiment 1

[0019] Recipe: total amount = 1000kg

[0020] PVA1788

25kg

PVA0588

8kg

Methacrylate

4kg

Carboxybutylbenzene DL 264PA

200kg

vinyl acetate

290kg

BYK024

1kg

tertiary ethylene carbonate

23kg

Sodium acetate

1kg

4-HBA

15kg

EXG-202

10kg

NMA - 48%

6kg

Ammonium persulfate

0.5kg

LEX fungicide

1kg

Sodium thiosulfate

0.1kg

water

415.4kg

[0021] Production Process:

[0022] A, 0.5kg ammonium persulfate is dissolved in 19.5kg water to obtain 20kg ammonium persulfate solution, 0.1kg sodium thiosulfate is dissolved in 0.9kg water to obtain 1kg sodium thiosulfate solution; 6kg NMA is dispersed in 14kg water to obtain 20kg NMA aqueous solution; 290kg vinyl acetate, 23kg tertiary vinyl carbonate, 15kg4-HBA and 4kg methacrylic acid are added to the monomer tank to mix and stir to make 332kg mixed monomers;

[0023] B, remaining water is ad...

Embodiment 2

[0026] Embodiment two formulas: total amount=1000kg

[0027] PVA1792

30kg

PVA0588

4kg

Methacrylate

4kg

Carboxybutylbenzene DL 264PA

205kg

vinyl acetate

295kg

BYK024

1.1kg

tertiary ethylene carbonate

26kg

Sodium acetate

1.1kg

4-HBA

17kg

EXG-202

11kg

NMA - 48%

6kg

Ammonium persulfate

0.5kg

LEX fungicide

1.1kg

Sodium thiosulfate

0.1kg

water

398.1kg

[0028] Production Process:

[0029] A, 0.5kg ammonium persulfate is dissolved in 19.5kg water to obtain 20kg ammonium persulfate solution, 0.1kg sodium thiosulfate is dissolved in 0.9kg water to obtain 1kg sodium thiosulfate solution; 6kg NMA is dispersed in 14kg water to obtain 20kg NMA aqueous solution; 295kg of vinyl acetate, 26kg of tertiary vinyl carbonate, 17kg of 4-HBA and 4kg of methacrylic acid are added to the monomer tank to mix and stir to make 342kg of mixed monome...

Embodiment 3

[0034] Recipe: total amount = 1000kg

[0035] PVA1788

24kg

PVA0588

12kg

Methacrylate

5kg

Carboxybutylbenzene DL 392PA

210kg

vinyl acetate

300kg

BYK024

1.2kg

tertiary ethylene carbonate

29kg

Sodium acetate

1.2kg

4-HBA

18kg

EXG-202

12kg

NMA - 48%

7kg

Ammonium persulfate

0.6kg

LEX fungicide

1.2kg

Sodium thiosulfate

0.2kg

water

378.6kg

[0036] Production Process:

[0037]a, 0.6kg ammonium persulfate is dissolved in 19.4kg water, obtains 20kg ammonium persulfate solution, 0.2kg sodium thiosulfate is dissolved in 0.8kg water, obtains 1kg sodium thiosulfate solution; 7kgNMA is dispersed in 13kg water, obtains 20kg of NMA aqueous solution; 300kg of vinyl acetate, 29kg of tertiary vinyl carbonate, 18kg of 4-HBA and 5kg of methacrylic acid were added to the monomer tank and mixed evenly to make 352kg of mixed monomer;

[0038] b...

Images