A method for preparing polyvinyl alcohol is provided to reduce water-insoluble polyvinyl alcohol when the prepared polyvinyl alcohol is dissolved in water. A method for preparing polyvinyl alcohol includes the steps of: (a) dissolving polyvinylester-based polymer in a mixed solvent comprising 60-99.9...
1) Pyridine method: Polyvinyl alcohol is swollen in excess pyridine, and then cinnamic acid is added for the reaction. This method has a high reaction rate but produces colloidal byproducts. 2) Alkaline solution method: Polyvinyl alcohol is dissolved in water, and an alkaline solution is added ...
A. Solubility: Polyvinyl alcohol powder can dissolve in water. Polyvinyl alcohol Resin (PVA) with an alcoholysis degree less than 95% can be dissolved in room temperature water, while polyvinyl alcohol resin (PVA) with an alcoholysis degree greater than 99.5% can only be dissolved in hot wat...
Polyvinyl alcohol resin and method for producing same Provided are a polyvinyl alcohol resin superior in handling and less prone to generate dissolution residue when dissolved in water, and a method for produc... 玉井大史 - CN 被引量: 0发表: 2013年 METHOD FOR PRODUCING POLYVINYL ALCOHOL-BASED ...
Polyvinyl alcohol is an excellent water-based adhesive. The general product is flake, granular or flocculent. It is not easily soluble in cold water. Heating is generally required during dissolution. After being finely pulverized and surface treated, it has better cold water dissolving performance. ...
PVA/Polyvinyl alcohol, organic compound, white flake, flocculent or powder solid, odorless.Dissolved in water. Slightly soluble in dimethyl sulfoxide. Polyvinyl alcohol is an important chemical raw material used to make polyvinyl polymer, gasoline-resistant...
Polyvinyl alcohol is an excellent water-based adhesive. The general product is flake, granular or flocculent. It is not easily soluble in cold water. Heating is generally required during dissolution. After being finely pulverized and surface treated, it has bett...
摘要: PROBLEM TO BE SOLVED: To obtain both a PVA-based water-soluble fiber hardly foaming when dissolved in water, etc., having improved mechanical performances in comparison with a conventional polyvinyl alcohol-based water-soluble fiber and a fiber structure using the fiber....
Polyvinyl alcohol is an excellent water-based adhesive. The general product is flake, granular or flocculent. It is not easily soluble in cold water. Heating is generally required during dissolution. After being finely pulverized and surface treated, it has better cold water dissolvin...
Polyvinyl alcohol is an excellent water-based adhesive. The general product is flake, granular or flocculent. It is not easily soluble in cold water. Heating is generally required during dissolution. After being finely pulverized and surface treated, it has better cold water dissolving ...