Polyvinyl acetate latex and copolymer rubber

1 Polyvinyl acetate emulsion glue Most polyvinyl acetate glues are emulsion type, and polyvinyl acetate copolymer emulsion glue is the most important species.
Emulsion adhesives use polyethylene as a protective colloid and thickener to increase the wet stickiness and surface adhesion of the emulsion. The amount of polyvinyl ester is 4-5%. Thickened emulsions with polyvinyl ester have very good thixotropy. Its molecular weight and degree of hydrolysis have a great influence on the water resistance of the film. When the degree of hydrolysis of 87-88% polyvinyl ester is used as a protective colloid, the resulting film can be dispersed with water.
Thickeners can also be used methyl cellulose, starch, polyacrylates and the like.
Solvents such as chloroalkanes. Post-aromatic esters can increase the consistency and viscosity and lower the film formation temperature.
Plasticizers such as dibutylphthalate can increase the flexibility and water resistance of the film.
Defoamers use ester compounds such as silicone oil, preservatives such as formaldehyde and phenol.
Formula One: D-503 Polyvinyl Ester (Completely Hydrolyzed) 5 Water 50

Clay 10 polyvinyl acetate emulsion 31
DAP 3.5 Preservatives 0.3

Defoamer 0.2
Formula two:

Polyvinyl acetate emulsion 100 DBP 3-20

Starch 10-60 Sodium tripolyphosphate 0.1-2
Formaldehyde (37%) 0.2-0.5
Formula three: white plastic

Vinyl Acetate 100 Water 90

Polyvinyl ester 9 Ammonium persulfate 0.2

Octyl phenol polyvinyl chloride ether 1.2 Sodium bicarbonate 0.3
DAP 11.3
Formula four: room temperature rapid curing adhesive

Group A: Acetylated polyvinyl ester 100 (15% aqueous solution)

Polyvinyl acetate emulsion 20 Sodium carbonate (4%) 2

Group B: Acetaldehyde (20%) 100 Ammonium bicarbonate (20%) 2

Polyvinyl acetate emulsion glue is suitable for porous materials, such as wood, paper products and other cellulosic materials. It is widely used in construction, carpentry, packaging and binding industries.
Emulsion adhesive curing mechanism: The water in the emulsion penetrates into the porous material and gradually volatilizes to increase the concentration of the emulsion. The surface tension causes the polymer to precipitate. If the ambient temperature is very low, the polymer becomes discontinuous particles, so that the bonding strength is not obtained; the minimum film forming temperature of the polyvinyl acetate emulsion without the plasticizer is 20Z. Plasticizers can lower the minimum film formation temperature.
2 Polyvinyl acetate solution glue solution has excellent bonding strength to non-polar surfaces, with high transparency but low strength and poor heat resistance.
3 Polyvinyl acetate copolymer glue formula: GBM-300 cis-acetic acid copolymer emulsion (also GBM-40#, DBM-30#) is made of dibutyl maleate and vinyl acetate and other components, curing conditions: 20Z, 24h; mainly used for bonding of wood, paper and wireless book binding.
4 Polyvinyl acetate-ethylene copolymer hot melt adhesive (EVA glue)