Yingjia ultra low molecular weight polyvinyl alcohol
One
Introduction of Yingjia ultra-low molecular weight PVA products
Yingjia ultra-low molecular weight polyvinyl alcohol resin PVA, white or yellowish in appearance, non-toxic, tasteless and pollution-free, can be dissolved in 60-80 ℃ water. Its aqueous solution has good adhesion, film-forming and emulsifying properties, and the film formed by it has excellent adhesion, solvent resistance, friction resistance, tensile strength and oxygen resistance. Because PVA has both hydrophilic and hydrophobic functional groups at the same time, it has interfacial active substances, so PVA can be used as a protective colloid for polymer emulsification and suspension polymerization. It has the chemical properties of esterification, etherification and acetalization of long-chain polyols.
Two
Properties of Yingjia ultra-low molecular weight PVA products
1. Film forming property: Yingjia ultra-low molecular weight PVA film is easy to form, and its mechanical properties are excellent. The tensile strength of the film increases with the degree of polymerization and alcoholysis. 　
2. Protective colloid: Yingjia ultra-low molecular weight PVA plays a protective role in the production of redispersible latex powder.
3. Thermal stability: when Yingjia ultra-low molecular weight PVA is heated to about 100 ℃, its appearance changes gradually. The partial alcoholysis PVA began to melt at about 190 ℃ and decompose at 200 ℃. The PVA with complete alcoholysis began to melt at about 230 ℃ and decompose at 240 ℃. The results show that the lower the degree of polymerization, the faster the weight reduction, and the higher the degree of alcoholysis, the shorter the decomposition time.
Three
Application of Yingjia ultra-low molecular weight PVA products
1. Textile industry;
2. Paper making and paper processing;
3. Plywood, wood-based panel, wood industry;
4. Chemical industry (polymerized emulsifier, dispersant; protective colloid for redispersible latex powder; polyvinyl acetate emulsion).
5. Construction industry (molding board adhesive, construction glue, 107 glue, construction adhesive; coating, dry powder coating, dry powder mortar, putty powder, gypsum products, interface agent, special mortar; additives in Oilfield cementing; environmental protection dust suppressant for coal and road)
6. PVA sponge and abrasive round paper
7. PVA film;
8. Electronics (ferrite magnets, ceramic resistors, ceramic capacitors, magnetic materials; fluorescent adhesives; photosensitive resins)
9. Stationery (ink, pigment binder; office paste; self-adhesive)
10. Adhesives for porcelain clay, pottery clay, glaze medicine, etc.; metal surface treatment; temporary protective film; cosmetics, pharmaceutical accessories; soil improver, pesticide adhesion synergist, food; PVA molding materials; high frequency quenchant, etc.
Four
The method of dissolving Yingjia ultra-low molecular weight PVA
Yingjia PVA product is first added into the normal temperature water, then stirred. After 30 minutes of swelling, it is heated and stirred for 1 hour. When the temperature reaches 60 degrees, it can be kept at a constant temperature until all the PVA is dissolved. In addition, the PVA can be put into a container with water, directly filled with high temperature steam, and finally adjusted to a suitable concentration according to the proportion. The aqueous solution is clear and transparent.
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