Preparation method of latex for plant-based coated whiteboard paper

A technology of base coating and white paperboard, applied in the direction of coating, paper, papermaking, etc., can solve the problems of low bonding strength, high bonding strength, and latex pollution of the environment, and achieve the effect of low cost and high bonding strength

Inactive Publication Date: 2016-12-14
DONGGUAN POWERBOND NEW MATERIALS TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: the existing solvent-based latex seriously pollutes the environment, and the water-based synthetic latex has the problem of low bond strength in the manufacturing process of coated white board paper. The present invention combines tapioca starch with hydrogen oxidized Mix sodium solution and sodium hypochlorite, carry out oxidation reaction to obtain oxidized starch, then mix it with sodium chloride, epichlorohydrin, and soybean polypeptide mixture prepared by soybean enzymatic hydrolysis, and heat reaction to obtain modified starch, and then the field After the cyanine seeds are crushed, mix and stir with ammonia water and absolute ethanol, filter the obtained filter residue for enzymolysis, then heat and filter to obtain a mixed solution, and finally mix the mixed solution with modified starch to obtain a plant-based coating latex for white cardboard
The invention mainly uses a variety of plants as raw materials to solve the problem of polluting the environment. At the same time, the prepared latex has good water resistance and high bonding strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First weigh 30g of soybeans, wash them with deionized water for 5 times, and place them in a pulverizer for crushing to obtain soybean powder. Put the soybean powder in an enzymatic hydrolysis tank, and add 0.5g of trypsin and 450mL of deionized water respectively. Control the temperature at 45°C and stir for 14 hours for enzymolysis. After the end of the enzymolysis, raise the temperature to 100°C, stir for 20 minutes, and filter to obtain the filtrate, which is the soybean polypeptide mixture, for later use; weigh 200g of tapioca starch and add it to a beaker. Put the beaker in a water bath, heat up to 50°C, add 400mL of deionized water, stir for 20min, then add 20% sodium hydroxide solution to adjust the pH to 9.2, then add 5g of sodium hypochlorite, stir for 6h to oxidize, then add The mass concentration is 10% hydrochloric acid solution to adjust the pH to be neutral, and filter to obtain oxidized starch; add the above-mentioned oxidized starch to a three-necked fla...

example 2

[0019]First, 20 g of soybeans were weighed, washed 3 times with deionized water, and placed in a pulverizer to pulverize to obtain soybean powder. The soybean powder was placed in an enzymatic hydrolysis tank, and 0.3 g of trypsin and 300 mL of deionized water were added respectively. Control the temperature at 35°C and stir for 12 hours for enzymolysis. After the end of the enzymolysis, raise the temperature to 90°C, stir for 10 minutes, and filter to obtain the filtrate, which is the soybean polypeptide mixture. Put the beaker in a water bath, heat up to 40°C, add 300mL of deionized water, stir for 10min, then add 10% sodium hydroxide solution to adjust the pH to 9.0, then add 3g of sodium hypochlorite, stir for 5h to oxidize, then add The mass concentration is 10% hydrochloric acid solution to adjust the pH to be neutral, and filter to obtain oxidized starch; add the above-mentioned oxidized starch to a three-necked flask with a thermometer and a reflux device, place the fla...

example 3

[0022] First, 25g of soybeans were weighed, washed 4 times with deionized water, and placed in a grinder for crushing to obtain soybean powder, which was placed in an enzymolysis tank, and 0.4g of trypsin and 400mL of deionized water were added respectively, Control the temperature at 40°C, stir the enzymolysis for 13 hours, after the end of the enzymolysis, raise the temperature to 95°C, stir for 15 minutes, and filter to obtain the filtrate, which is the soybean polypeptide mixture, for later use; weigh 151g of tapioca starch and add it to the beaker, Put the beaker in a water bath, heat up to 45°C, add 350mL of deionized water, stir for 15min, then add 15% sodium hydroxide solution to adjust the pH to 9.1, then add 4g of sodium hypochlorite, stir for 5h to oxidize, then add The mass concentration is 10% hydrochloric acid solution to adjust the pH to be neutral, and filter to obtain oxidized starch; add the above-mentioned oxidized starch to a three-necked flask with a thermo...

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Abstract

The invention relates to a preparation method of latex for plant-based coated whiteboard paper and belongs to the technical field of latex preparation. The preparation method comprises: mixing cassava starch with sodium hydroxide solution and sodium hypochlorite, oxidizing to obtain starch oxide, subjecting the starch oxide with materials such as sodium chloride, epoxy chloropropane and soybean peptide mixed liquid prepared by soybean enzymatic hydrolysis to mixing and thermal reaction to obtain modified starch, crushing Sesbania cannabina seeds, mixing and stirring the seeds with ammonia water and absolute ethyl alcohol, filtering to obtain filter residue, enzymatically hydrolyzing, heating, filtering to obtain a mixed liquid, and stirring the mixed liquid with the modified starch to obtain the latex for plant-based coated whiteboard paper. The latex for plant-based coated whiteboard paper prepared herein has high adhesive power, has viscosity of 295 mpa/s and above, is made from various plants, will not cause environmental pollution in use and has low cost for required materials.

Description

technical field [0001] The invention relates to a method for preparing latex for plant-based coated white board, and belongs to the technical field of latex preparation. Background technique [0002] White board paper has become a widely used packaging paper due to its high whiteness and high strength. It is composed of a surface layer, a core layer and a bottom layer. It is a kind of paper produced by multi-roller calendering. It has relatively uniform ink absorption and good folding resistance. It is mainly used for commodity packaging boxes, commodity surface linings, picture wall charts, etc. White board paper has small stretchability, toughness, and is not easy to break when folded. It is mainly used for printing packaging boxes and commodity decoration lining paper. In bookbinding, the spine used for perfect binding and the middle diameter paper (spine) or cover of hardcover books. [0003] In the manufacturing process of coated white board paper, the latex used is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/28D21H19/38D21H19/40D21H19/58D21H19/54D21H19/44D21H19/46C08B31/18C12P21/06
CPCC08B31/185C12P21/06D21H19/385D21H19/40D21H19/44D21H19/46D21H19/54D21H19/58D21H21/28
Inventor 丁玉琴薛培龙孟浩影
Owner DONGGUAN POWERBOND NEW MATERIALS TECH DEV
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