Ethylene-vinyl alcohol copolymer and aqueous solution using same
A technology of vinyl alcohol copolymers and copolymers, which is applied in the field of aqueous solutions and adhesives, and the manufacture of ethylene-vinyl alcohol copolymers. It can solve problems such as insufficient high-speed coating properties, and achieve water-resistant adhesion and high-speed coating Excellent performance and excellent water solubility
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0147] A continuous polymerization tank equipped with a reflux condenser, a raw material supply line, a reaction liquid discharge line, a thermometer, a nitrogen gas inlet, an ethylene inlet, and a stirring blade was used. Using a quantitative pump, continuously supply 671 L / hr of vinyl acetate, 147 L / hr of methanol, and 2,2'-azobis(4-methoxy-2,4-dimethylpentane) as an initiator to the continuous polymerization tank. Nitrile) (AMV) in 1% methanol solution 1L / hr. Adjustment was performed so that the ethylene pressure in the polymerization tank became 0.23 MPa. The polymerization solution is continuously taken out from the continuous polymerization tank so that the liquid level in the polymerization tank is kept constant. Adjustments were made so that the polymerization rate at the outlet of the continuous polymerization tank reached 30%. The residence time in the continuous polymerization tank was 5 hours. The temperature at the outlet of the continuous polymerization tank w...
Embodiment 2~8
[0150] Embodiment 2~8, comparative example 1~6
[0151] In addition to changing the polymerization conditions such as ethylene pressure, the amount of vinyl acetate, the amount of methanol, the amount and concentration of the initiator, the polymerization rate, the concentration of EVAc, the molar ratio of NaOH to the ethylene-vinyl ester copolymer, etc. Saponification conditions and cleaning Except for the cleaning conditions such as the water content of the solution, EVOH2 to EVOH14 were produced in the same manner as in Production Example 1. The production conditions are shown in Table 1, and the composition, water-insoluble components, etc. of the produced EVOH are shown in Table 2.
[0152] Except for changing the type of EVOH used, the type of inorganic filler, the type and content of the compound having a molecular weight of 1000 or less having a conjugated double bond, and the solid content concentration as shown in Table 3, it was the same as in Example 1. Operation,...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More