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Preparation method of water-resistant plant adhesive

An adhesive and water resistance technology, applied in the direction of monocarboxylic acid ester copolymer adhesive, unsaturated alcohol copolymer adhesive, adhesive type, etc., can solve the problems of unsatisfactory water resistance and difficult popularization and application, etc. Achieve the effects of improving storage stability, improving grafting efficiency and enhancing cohesion

Inactive Publication Date: 2011-11-09
王钱生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the unmodified starch adhesive, the water resistance of the adhesive prepared by this invention is improved, but its water resistance is still not ideal, and it is difficult to popularize and apply it in production.

Method used

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  • Preparation method of water-resistant plant adhesive
  • Preparation method of water-resistant plant adhesive
  • Preparation method of water-resistant plant adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 3Kg of polyvinyl alcohol, add 65Kg of water, dissolve it completely at 95°C, cool down to 50°C, add 12Kg of pregelatinized tapioca starch and 0.5Kg of urea, adjust the viscosity of the mixture to 2000mPa.s with borax, and heat up to 60°C, keep warm and stir for 30min, cool down to 45°C, keep warm for 120min, then cool down to 35°C, add vinyl acetate-ethylene copolymer emulsion (ethylene content is 14-18%, w / w, 35Kg, stir for 10min, then Add Tween-800.2Kg, stir and react for 30 minutes, add 0.1Kg of isothiazolinone, and stir evenly to obtain a water-resistant plant adhesive.

Embodiment 2

[0020] Take 5Kg of polyvinyl alcohol, add 70Kg of water, dissolve it completely at 95°C, cool down to 35°C, add 15Kg of pregelatinized tapioca starch and 0.3Kg of urea, adjust the viscosity of the mixture to 3000mPa.s, and heat up to 75 ℃, heat preservation and stirring reaction for 10min, cool down to 55℃, hold for 60min, then cool down to 40℃, add 30Kg of vinyl acetate-ethylene copolymer emulsion (ethylene content is 14-18%, w / w), stir for 30min, then add Tween-800.3Kg, stirring and reacting for 20min, adding 0.3Kg of isothiazolinone, and stirring evenly to obtain a water-resistant plant adhesive.

Embodiment 3

[0022] Take 6Kg of polyvinyl alcohol, add it to 75Kg of water, dissolve it completely at 95°C, cool down to 40°C, add 14Kg of pregelatinized tapioca starch and 0.8Kg of urea, adjust the viscosity of the mixture to 2500mPa.s, and heat up to 70°C, heat preservation and stirring reaction for 20min, cool down to 65°C, heat preservation and stirring reaction for 30min, then cool down to 55°C, add vinyl acetate-ethylene copolymer emulsion (ethylene content 14-18%, w / w) 25Kg, stir reaction for 20min, Then add Tween-80 0.4Kg, stir and react for 10min, finally add 0.15Kg of isothiazolinone, stir evenly, and obtain the water-resistant plant adhesive.

[0023] The product that above-mentioned embodiment is made sends quality inspection department to carry out performance inspection according to HG / T2727-1995 " polyvinyl acetate emulsion wood adhesive " requirement, and the result is as shown in following table 1; According to GB18583-2008 " interior decoration material adhesive The water...

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Abstract

The invention discloses a preparation method of a water-resistant plant adhesive. The preparation method comprises the following steps: adding 3-6 parts by weight of polyvinyl alcohol into 60-75 parts by weight of water; cooling to 35-50 DEG C after dissolving; adding 10-15 parts by weight of pre-gelatinized cassava starch and 0.3-0.8 part by weight of urea, adjusting the viscosity of the mixed liquid to 2000-3000 mPa.s by use of a crosslinking agent, raising the temperature to 60-75 DEG C, carrying out reaction under heat insulating condition for 10-30 minutes, cooling to 45-65 DEG C, carrying out heat preservation for 30-120 minutes, cooling to 35-55 DEG C, adding 25-35 parts by weight of vinyl acetate-ethylene copolymer emulsion, stirring for 10-30 minutes, then adding 0.2-0.5 part by weight of emulsifier and 0.1-0.3 part by weight of anticorrosion agent, and stirring for 10-20 minutes to obtain the water-resistant plant adhesive. Compared with the existing starch adhesive, the adhesive provided by the invention has water resistance increased by more than 2 times, and is still adherent to boil in water for 3 hours or more.

Description

technical field [0001] The invention relates to a preparation method of an adhesive, in particular to a preparation method of a water-resistant plant adhesive. Background technique [0002] Plant adhesive is a polymer compound with starch as the main raw material, which has the advantages of wide source of raw materials, low cost and no pollution. However, this adhesive has three major defects, such as low adhesive strength, poor water resistance and unstable storage, so its use is limited. In recent years, the water resistance of the product has been improved by modifying the adhesive, such as the Chinese invention patent with the publication number CN100999651, which discloses a method for preparing a starch-based wood adhesive with good water resistance and the product. application. The preparation method of starch-based wood adhesive is as follows: using starch as raw material, hydrochloric acid as catalyst, ammonium persulfate as initiator, and ethylene butanol as mon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J131/04C09J103/02C09J129/04
Inventor 王钱生
Owner 王钱生
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