Polyviny Alcohol (PVA)

Polyvinyl alcohol is an organic compound with the appearance of white flake, flocculent or powdery solid and odorless. It is soluble in water (above 95°C), slightly soluble in dimethyl sulfoxide, and insoluble in gasoline, kerosene, vegetable oil, benzene, toluene, ethylene dichloride, carbon tetrachloride, acetone, ethyl acetate, methanol, ethylene glycol, etc. Polyvinyl alcohol is an important chemical raw material, used to make polyvinyl acetal, gasoline-resistant pipes and vinylon, fabric treatment agents, emulsifiers, paper coatings, adhesives, glues, etc.

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Polyviny Alcohol (PVA)

It is a kind of white or yellowish granule or powder with a wide range of water-soluble and environment-friendly macromolecular polymers. Its performance is between plastic and rubber. Smoothness, oil resistance, solvent resistance, protective colloid, gas barrier, abrasion resistance and thermal stability.

Product Parameters

Элемент	Range（2488）
Alcoholysis degree	87.0-89.0 Mole(%)
viscosity	44.1-55.9 mpa.s
Volatile(%)	≤5.0 Wt.(%)
Ash (%)	≤0.5 %
PH	5-7
Purity	≥93.5 %
Mean degree of polymerization(DP)	2400-2500
Sodium Acetate %	2.8max

Product Physicochemical Characteristics

1.Жақсы қалыңдататын әсер

In surfactant, it has good thickening property

2.Good film formation

Can improve flexibility, flex resistance and stretch resistance of products.

3.Жақсы байланыс

Жақсы байланыстыру әсері үшін оны өнімде қолдануға болады

Product Application

01

PVA for Gray Calcium Base Putty

A very small amount of addition can significantly improve the cohesive strength, adhesion, and water resistance of the putty coating, reduce the amount of lime-calcium powder, and significantly improve the phenomenon of delamination and scarring during grinding,improve the surface fineness after putty polishing.
02

PVA for Cement-Based Exterior Wall Putty

improve the cement setting speed, improve the early strength of putty, good film formation, excellent durability and it is not easy to remove powder when the batch is thin.

03

PVA for Polishing Putty

It can improve the surface film formation, make the coating surface denser, harder, brighter, more resistant to scrubbing,and has obvious effects
04

PVA for Dry powder Mortar

Polyvinyl alcohol powder has good film-forming properties. it can be used together with cellulose ether water.retaining agent to improve the flexibility and water-retention of various cement mortars and gypsum building materials, improve the bonding strength of mortar, and effectively prevent peeling, cracking, empty drum.
05

PVA for Instant Glue

It is the main binder.It is combined with an appropriate amount of hydroxypropyl methyl cellulose, and then supplemented with an appropriate amount of thickening and complexing aids.A high-performance glue powder that can be leveled and can be batched separately without de-powdering.

Production Process

The production process of polyvinyl alcohol mainly includes alcoholysis reaction, saponification reaction, neutralization, washing, separation and drying. ‌

1.‌Alcoholysis reaction‌:
Using polyvinyl acetate as raw material, a semi-finished product with an alcoholysis degree of 80-92% and a particle size of 1-10 mm is prepared by alcoholysis reaction.

2.‌Saponification reaction‌:
Add the above semi-finished product to a sodium hydroxide solution with a concentration of 4-60 g/L, and stir and react at 0-20°C for 0.5 hours. The mass ratio of the semi-finished product to the alkali solution is 1:2-1:7.

3.‌Neutralization and washing‌:
After the reaction is completed, acetic acid is used to neutralize the residual alkali, and then washed with desalted water.

4.‌Separation and drying‌:
After washing, solid-liquid separation is carried out, and the solid is vacuum dried to obtain a high-purity polyvinyl alcohol with an alcoholysis degree of >92%. The sodium acetate content in the final product is less than 0.3%, and the volatile matter is less than 0.5%, which can be directly used in high-quality industries such as medicine and optical films.

Packing and Storage

Бұл өнім полиэтилен қабатымен қапталған көп қабатты қағаз пакеттерге оралған. Таза салмағы 25 кг.
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