The characteristics of PVA 0588
Properties of polyvinyl alcohol and its degree of polymerization and alcoholysis degree are close to correlation and determines of the nature of its application. Conventional varieties due to the existence of defects in the heat resistant polyvinyl alcohol, water resistance, creep resistance and so on, affect the scope of its application. Generally speaking, the lower the degree of alcoholysis of polyvinyl alcohol molecules, remaining vinegar acid is higher, its surface activity and dispersing property is better; the degree of polymerization and alcoholysis of polyvinyl alcohol dissolved in the lower, the better the water; degree of polymerization and alcoholysis degree is low, the better the performance of PVA biodegradation.
The difference of polyvinyl alcohol polyvinyl alcohol 0588 belongs to a low degree of polymerization, partial alcoholysis type, the equivalent of a hydrophobic monomer vinyl acetate copolymer modified polyvinyl alcohol.
Polyvinyl alcohol 0588 has excellent surface activity, can be used for PVAc, VAE emulsion, VAc emulsion polymerization of vinyl chloride suspension polymerization of emulsifier, dispersant. According to statistics, in 2003 China's PVC production reached 4000000 tons, while more than 80% of the suspension polymerization process. In the suspension polymerization of vinyl chloride, dispersing agent for polyvinyl alcohol 0588, each year about 5000 to 8000 tons, basically rely on imports.
In addition, because the safety tests showed that the PVA is of low toxicity, non irritating, Japan and other countries American is already approved for use in medicine and food industry.
Currently used in the pharmaceutical industry of polyvinyl alcohol is mainly PVA0588 and PVA1788. The molecular weight of PVA0588, PVA were superior in moisture absorption, water soluble and flexibility of other types of film, widely used in traditional Chinese medicine, can be used as coating film material, filming agent film forming material, gel preparation of matrix materials and so on. Taking PVA 0588 as film-forming materials Pseudolarix coating agent, preparation of stable properties, applied to the skin can quickly into the film, film is not easy to fall off, and the PVA can be directly with the traditional Chinese medicine extracts mixed in any proportion. Taking PVA0588 as membrane material points with cough coating agent has antitussive, antiasthmatic, obviously, to overcome the traditional oral dosage big, long course of treatment and side effect big shortcoming, it opens a new way for external treatment for internal diseases.
Therefore, study on the synthesis of PVA 0588, broaden the application field of polyvinyl alcohol polyvinyl alcohol industry in China, to speed up the adjustment of product structure, has a very important practical significance to realize the sustainable development.
The difference of polyvinyl alcohol polyvinyl alcohol 0588 belongs to a low degree of polymerization, partial alcoholysis type, the equivalent of a hydrophobic monomer vinyl acetate copolymer modified polyvinyl alcohol.
Polyvinyl alcohol 0588 has excellent surface activity, can be used for PVAc, VAE emulsion, VAc emulsion polymerization of vinyl chloride suspension polymerization of emulsifier, dispersant. According to statistics, in 2003 China's PVC production reached 4000000 tons, while more than 80% of the suspension polymerization process. In the suspension polymerization of vinyl chloride, dispersing agent for polyvinyl alcohol 0588, each year about 5000 to 8000 tons, basically rely on imports.
In addition, because the safety tests showed that the PVA is of low toxicity, non irritating, Japan and other countries American is already approved for use in medicine and food industry.
Currently used in the pharmaceutical industry of polyvinyl alcohol is mainly PVA0588 and PVA1788. The molecular weight of PVA0588, PVA were superior in moisture absorption, water soluble and flexibility of other types of film, widely used in traditional Chinese medicine, can be used as coating film material, filming agent film forming material, gel preparation of matrix materials and so on. Taking PVA 0588 as film-forming materials Pseudolarix coating agent, preparation of stable properties, applied to the skin can quickly into the film, film is not easy to fall off, and the PVA can be directly with the traditional Chinese medicine extracts mixed in any proportion. Taking PVA0588 as membrane material points with cough coating agent has antitussive, antiasthmatic, obviously, to overcome the traditional oral dosage big, long course of treatment and side effect big shortcoming, it opens a new way for external treatment for internal diseases.
Therefore, study on the synthesis of PVA 0588, broaden the application field of polyvinyl alcohol polyvinyl alcohol industry in China, to speed up the adjustment of product structure, has a very important practical significance to realize the sustainable development.
stevia - 27. Nov, 07:54
