Method for preparing oxidized starch modified vinyl acetate-acrylate latex

A technology of oxidizing starch and acetic acid acrylic emulsion, applied in the directions of starch-derived adhesives, adhesive types, monocarboxylic acid ester copolymer adhesives, etc., can solve problems such as water resistance not mentioned, application and promotion restrictions, etc. Achieve the effect of increasing solid content, reducing free monomer content and reducing environmental pollution

Inactive Publication Date: 2009-04-29
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modified product is mainly used for the bonding of relatively rigid materials, and the water resistance of flexible materials such as textile fibers and bonded products is not mentioned, which limits the application and promotion of this product to a certain extent.

Method used

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  • Method for preparing oxidized starch modified vinyl acetate-acrylate latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 0.04g of anionic emulsifier K 12 , 0.4g of non-ionic emulsifier Span and 853g of deionized water were emulsified for 10min, and under strong stirring, 0.4g of vinyl acetate and 0.04g of acrylic acid were added as seed monomers and 0.44g of perchloric acid oxidized starch to form a transparent seed microemulsion. Slowly raise the temperature to 40°C, add 0.04g of ammonium persulfate to initiate microemulsion polymerization, and slowly add the remaining 39.6g of vinyl acetate and 3.96g of acrylic acid dropwise after the emulsion turns blue, and finish the dripping within 4 hours, keep warm at 60°C for 6 hours, and then use 0.00055g sodium hydroxide regulates the system pH value to 6.5, stops heating after continuing to stir for 15min, cools and discharges, and obtains the vinegar-acrylic polymer emulsion PVA-1 (wherein the oxidized starch is modified by 5% translucent oxidized starch) with a solid content of 5%. Linked starch quality accounts for 1% of the acetate pro...

Embodiment 2

[0020] Add 6g of anionic emulsifier SDS, 2g of nonionic emulsifier Tween, and 192g of deionized water into a 500mL four-necked bottle equipped with a stirrer, reflux condenser, thermometer, and feeding device for emulsification for 1 hour, and add 9g of vinyl acetate and 6g of methyl methacrylate was used as the seed monomer and 8g of potassium permanganate oxidized starch to prepare a transparent seed microemulsion. Slowly raise the temperature to 82°C, add 1.8g of potassium persulfate to initiate microemulsion polymerization, and slowly add the remaining 51g of vinyl acetate and 34g of methyl methacrylate dropwise after the emulsion turns blue, and finish the dripping within 2 hours, then keep warm at 92°C for 1.5h , then adjust the pH value of the system to 8.9 with 3g ammonium bicarbonate, stop heating after continuing to stir for 15min, and cool the discharge to obtain a translucent oxidized starch modified vinegar-acrylic polymer emulsion PVA-8 (wherein the solid content ...

Embodiment 3

[0022] Add 6g of anionic emulsifier SDS, 3g of nonionic emulsifier OP-10 and 331g of deionized water into a 1000mL four-necked bottle equipped with a stirrer, reflux condenser, thermometer and feeding device for 30 minutes, and add 10g of vinyl acetate under strong stirring ester and 5g butyl acrylate as seed monomer and hydrogen peroxide oxidized starch 15g to form a transparent seed microemulsion. Slowly raise the temperature to 75°C, add 4.5g of potassium persulfate to initiate microemulsion polymerization, and slowly add the remaining 90g of vinyl acetate and 45g of butyl acrylate dropwise after the emulsion turns blue, and finish the dripping within 1.5h, keep warm at 88°C for 1h, and then Regulate system pH value to 9.5 with 0.03g ammoniacal liquor, stop heating after continuing to stir for 15min, cool and discharge, obtain the vinegar-acrylic polymer emulsion PVA-15 (wherein oxidative cross-linking The starch quality accounts for 15% of the acetate propylene polymer). ...

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Abstract

The invention relates to a preparation method for propyl acetate emulsion modified by oxidized starch. The preparation method comprises the following steps: adding 1.0 to 15.5 percent of composite emulsifying agent and 95 to 35 percent of deionized water of total monomer mass into four bottles filled with a stirrer, a reflux condensation tube, a thermometer and a feeding device to emulsify the mixture for 10 minutes to 3 hours; and under intense stirring, adding 1 to 50 percent of seed monomer and 1 to 50 percent of the oxidized starch of the total monomer mass into the mixture to prepare transparent seed microemulsion; heating the mixture to between 40 and 100 DEG C, adding initiating agent to initiate the microemulsion to polymerize, dripping rest monomer, keeping the temperature for 30 minutes to 6 hours, then using alkali substances to adjust pH value of a system to between 6.5 and 10.5, and cooling and discharging the microemulsion to obtain the propyl acetate polymer emulsion modified by the semitransparent oxidized starch with 5 to 65 percent of solid content. The propyl acetate emulsion modified by the oxidized starch has the characteristics of stable storage, low residual monomer content, good mechanical strength after the emulsion forms a film, low cost, environmental protection, and the like.

Description

technical field [0001] The invention relates to a modification preparation technology of an adhesive for textile and artificial fur, and a vinyl acetate-acrylic acid and its ester (vinyl-acrylic acid) emulsion adhesive for glass fiber mesh cloth used in buildings, especially a method of using oxidation The preparation method of starch-modified vinegar-acrylic emulsion. The oxidized starch modified pure vinegar emulsion has the properties of stable storage, low residual monomer content, good mechanical strength after emulsion film formation, low cost, environmental protection and the like. Background technique [0002] Acrylic emulsion is the product of emulsion polymerization of vinyl acetate monomer with high activity and acrylic acid and its ester monomers. The polymerization is carried out under normal pressure, the production process and equipment are simple, and the environmental pollution is small. It is one of the most important emulsion adhesives widely used in wood...

Claims

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Application Information

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IPC IPC(8): C08L31/04C08L3/10C08J3/24C08F218/08C08F2/24C09J131/04C09J103/10
Inventor 邱凤仙杨冬亚孙丽丽
Owner JIANGSU UNIV
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