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Patent name: A modified polyvinyl alcohol coating solution insoluble in water and its production process Patent applicant Liu Jianlin Principal applicant Address 071500 Inventor of the west side of Gaoyang County Party Committee of Baoding City, Hebei Province Application No. 200510065842.6 Date of application: 2005.04 .11 Award date approval announcement number 1683458 approval announcement date 2005.10.19 specification CD-ROM D0542 main classification number C09D129/04 classification number C09D129/04 division Original application number priority item 2004.4.12 CN 200410034458.5 Abstract The present invention discloses a Water-insoluble modified polyvinyl alcohol coating liquid and its production process. The product of the invention consists of polyvinyl alcohol, regulators, inorganics, cross-linking agents, catalysts and water. The preparation process of the invention is: after the polyvinyl alcohol, the regulator, the inorganic substance and the water are fully mixed, the temperature is raised and the stirring is performed; when the temperature reaches 90-95 DEG C, the heat is kept, so that the polyvinyl alcohol is fully dissolved, and the temperature is lowered to room temperature. Adding a cross-linking agent, and mixing well to obtain the A component of the product of the present invention; before the use is started, adding the B component of the product of the present invention: a catalyst and stirring thoroughly. The product of the present invention is insoluble in water, has good processability, water resistance after film formation, reflectance to ultraviolet light and infrared light, abrasion resistance, barrier properties, and adhesion to a base film. The oxygen transmission rate is reduced by more than 10 times, and the water vapor transmission rate is reduced by more than 5 times. Can meet the needs of all products that require barrier packaging, and greatly extend the shelf life of the packaged products, and has excellent fragrance protection. Sovereign Items 1. A water-insoluble modified polyvinyl alcohol coating solution containing polyvinyl alcohol, a regulator, a cross-linking agent, and water, characterized in that it also contains inorganic substances and a catalyst.
March 24, 2019