Preparation method of novel ion-type vinyl acetate emulsion for high saline-alkali land desertification management

The technology of vinyl acetate and saline-alkali land is applied in the field of preparation of novel ionic vinyl acetate emulsion, which can solve the problems of easy powdering of sand-fixing materials and poor consolidation strength, and achieve the effects of low price, inhibition of evaporation and wide sources.

Inactive Publication Date: 2017-01-04
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the main problems existing in the current sand-fixing materials, the purpose of the present invention is to provide a method for preparing a new type of ionic vinyl acetate emulsion for desertification control in high-saline-alkaline lands, so as to solve the problems of easy pulverization and consolidation strength of existing sand-fixing materials in high-saline-alkaline lands. Bad question

Method used

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  • Preparation method of novel ion-type vinyl acetate emulsion for high saline-alkali land desertification management
  • Preparation method of novel ion-type vinyl acetate emulsion for high saline-alkali land desertification management
  • Preparation method of novel ion-type vinyl acetate emulsion for high saline-alkali land desertification management

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Embodiment 1

[0032] 32.5 parts of vinyl acetate, 1.0 part of acrylic acid and 16.5 parts of dibutyl maleate monomers were premixed to obtain mixed monomers. Dissolve 0.3 parts of potassium persulfate in 30 parts of deionized water and 1.2 parts of sodium styrene sulfonate in 30 parts of water. Add 60 parts of water, 0.67 parts of sodium lauryl sulfate and 1.5 parts of L35 into the reaction kettle, heat up to 50°C, react for 15 minutes, continue to heat up to 65°C, add 1 / 3 (accounted for total potassium persulfate Weight fraction) Potassium persulfate solution, emulsified for 20 minutes, then heated to 74 ° C, added 1 / 3 (mass fraction of the total weight of the mixed monomer) vinyl acetate, acrylic acid and dibutyl maleate mixed monomer and 1 / 3 (mass fraction of the total weight of sodium styrene sulfonate) sodium styrene sulfonate aqueous solution, after reacting for 30 minutes, slowly add the remaining initiator dropwise with a constant pressure dropping funnel, and slowly add the remaini...

Embodiment 2

[0041] 30 parts of vinyl acetate, 2 parts of acrylic acid and 15 parts of dibutyl maleate monomers were premixed to obtain mixed monomers. 1.0 parts of potassium persulfate was dissolved in 15 parts of deionized water, and 2.0 parts of 2-acrylamido-2-methylpropanesulfonic acid was dissolved in 20 parts of water. Add 70 parts of water, 1.0 parts of sodium lauryl sulfate and 2.0 parts of Tween 60 into the reaction kettle, heat up to 55°C, react for 30 minutes, continue to heat up to 65°C, add 1 / 3 of the persulfuric acid The mass fraction of the total weight of potassium) potassium persulfate solution, emulsified for 30 minutes, then warmed up to 75 ° C, and added 1 / 5 (the mass fraction of the total weight of the mixed monomer) of vinyl acetate and dibutyl maleate mixed monomer and 1 / 3 (mass fraction of the total weight of 2-acrylamido-2-methylpropanesulfonic acid) 2-acrylamido-2-methylpropanesulfonic acid aqueous solution, initiate the reaction for 10min, and use constant pressu...

Embodiment 3

[0043] 50 parts of vinyl acetate, 1.5 parts of acrylic acid and 10 parts of dibutyl maleate monomers are premixed to obtain mixed monomers. Dissolve 1.5 parts of potassium persulfate in 20 parts of deionized water and 2.0 parts of sodium p-vinylsulfonate in 20 parts of water. Add 30 parts of water, 1.0 part of sodium oleate and 2.0 parts of polyether L35 into the reaction kettle, heat up to 55°C, react for 20 minutes, continue to heat up to 65°C, add 1 / 4 of the total weight of potassium persulfate mass fraction) potassium persulfate solution, emulsified for 30 minutes, then heated up to 75°C, added 1 / 4 (the mass fraction of the total weight of the mixed monomer) the mixed monomer of vinyl acetate and dibutyl maleate and 1 / 5 (accounting for the mass fraction of the total weight of sodium p-vinylsulfonate) sodium vinylsulfonate aqueous solution, initiated the reaction for 10 minutes, slowly added the remaining initiator dropwise with a constant pressure dropping funnel, and slow...

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Abstract

The invention relates to a preparation method of a novel ion-type vinyl acetate emulsion for high saline-alkali land desertification management. According to the preparation method, seed emulsion polymerization is used, vinyl acetate adopted as a main monomer, dibutyl maleate adopted as a soft monomer, acrylic acid adopted as an auxiliary monomer and a functional monomer containing a sulfonic acid group monomer are subjected to copolymerization, a water-soluble peroxide compound is adopted as an initiator, and an anionic emulsifier and a nonionic emulsifier are adopted as a composite emulsification system to synthesize the saline-alkali-tolerant polyvinyl acetate copolymerization emulsion. According to the present invention, the product has advantages of excellent bonding performance to the high saline-alkali land, strong wind erosion resistance, no environment pollution, no influence on plant growth and the like, and can be suitable for the high saline-alkali sandy land desertification management, and the preparation method has advantages of simpleness and the like, and is suitable for large-scale production.

Description

technical field [0001] The invention specifically relates to a preparation method of a novel ionic vinyl acetate emulsion used for desertification control of high-saline land, and belongs to the field of chemical sand fixation. Background technique [0002] As an extremely important environmental and social problem, saline-alkali desertification is plaguing the world today and threatening the survival and development of human beings. All countries in the world regard the control of saline-alkali desertification as an important issue for ecological environment construction and sustainable development. [0003] The area of ​​saline-alkali land in my country is about 9913×10 4 hm 2 , of which the modern saline-alkali land is about 3.693×10 7 hm 2 , the residual saline-alkali land is about 4.487×10 7 hm 2 , and there is still 1.733×10 7 hm 2 The potential saline soil is mainly distributed in the plains of 23 provinces, municipalities, and autonomous regions in the five ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F218/08C08F222/14C08F220/06C08F212/14C08F220/58C08F228/02C08F2/26C08F2/30C09K17/20C09K101/00
Inventor 刘白玲龚伟谢浩徐前陈华林臧运晓
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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