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Method for preparing double-walled flavoring essence microcapsules

A technology of essence microcapsules and aromatic hydrocarbons, applied in the directions of microcapsule preparation, microsphere preparation, essential oil/fragrance, etc., can solve the problems of complicated fabric finishing process, and achieve the effect of simplifying finishing process and good effect

Inactive Publication Date: 2018-06-01
贺州宝兴新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing double-walled essence microcapsules, which is used to solve the complex problem of fabric finishing process while ensuring the essence encapsulation rate, fragrance retention time and controlled release performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] A method for preparing double-wall essence microcapsules, comprising the steps of:

[0027] (1) Preparation of styrene-maleic anhydride copolymer powder

[0028] Dissolve styrene, maleic anhydride and initiator in a mixed solvent of aromatic hydrocarbons and ketones to prepare a mixed solution, wherein: the molar ratio of styrene to maleic anhydride is 1:1-5:1; in the mixed solution The mass percent of the aromatic hydrocarbon solvent is 10%-80%; the mass ratio of the ketone solvent to the maleic anhydride in the mixed solution is 0.5:1-3:1; the quality of the initiator accounts for 0.5-5% of the mixed solution; the aromatic The hydrocarbon solvent is an aromatic hydrocarbon solvent with 7-10 carbon atoms;

[0029] Add the mixed solution dropwise into a constant temperature, appropriate amount of aromatic hydrocarbon solvent for reaction. The reaction temperature is 80-100°C, and the dropwise addition time is 2-6 hours. After the aromatic hydrocarbons and ketones are ...

Embodiment 1

[0041] (1) Preparation of styrene-maleic anhydride copolymer powder

[0042] The solution medium added to the reactor is 300kg of toluene, an oil bath, and the temperature is 100°C. The molar ratio of MAH and St is 1:1, wherein 8.812kg of maleic anhydride, 41.188kg of styrene, and 4kg of azobisisobutyronitrile (AIBN) are dissolved and mixed with solvent toluene 120kg and butanone 39kg to obtain a mixed solution. The mixed solution was added dropwise into the reactor for 4 hours, and the reaction was continued for 1 hour after the dropwise addition. Filtrate and dry to obtain styrene-maleic anhydride copolymer powder with a weight average molecular weight of 8865 kg / mol.

[0043] (2) Preparation of styrene-maleic anhydride copolymer solution

[0044] Add 1 part of styrene-maleic anhydride copolymer powder and 17 parts of deionized water into a four-necked bottle in parts by weight, heat up to 65°C under stirring conditions, and adjust the pH to 8.3 with a 25% NaOH solution. ...

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Abstract

The invention discloses a method for preparing double-walled flavoring essence microcapsules. The method comprises the steps of firstly, coating flavoring essence, which serves as capsule cores, withmelamine resin and polyacrylate, which serve as a wall material, by taking a styrene-maleic anhydride copolymer as an emulsifier through an in-situ polymerization method and an interface polymerization method separately, thereby obtaining melamine-resin flavoring essence microcapsules. The method has the effects that self-adhesive double-walled flavoring essence microcapsules are prepared by adopting a safe and environment-friendly preparation method and have the solid content of 30% to 35% which is higher than that of other flavoring essence microcapsules on the market by 10% to 15%. Double-layer walling up is carried out through the in-situ polymerization method and the interface polymerization method, the flavoring essence wrapping rate can reach 90% to 95%, and a product emulsion has good stability. The self-adhesive double-walled flavoring essence microcapsules maintain particular advantages of the microcapsules, meanwhile, the microcapsules can have a self-adhesive property, anda cotton fabric finishing process is simplified. Finished cotton fabrics have a good fragrance remaining effect, the standing fragrance remaining can reach 6 months, and the cotton fabrics still can maintain joyful fragrance after 10 times of rinsing.

Description

technical field [0001] The invention belongs to the technical field of textile finishing, and specifically relates to a self-adhesive fabric with melamine resin and polyacrylate as the double-layer wall material and essence as the core material respectively formed by in-situ polymerization and interface polymerization. The preparation method of essence microcapsule. Background technique [0002] Microcapsule technology is a microcapsule technology that uses polymer materials to embed active substances to form semi-permeable or sealed capsules. It can improve the physical properties of the encapsulated substance, isolate the active ingredient from the external environment, enhance stability, reduce volatility, prolong shelf life, and also have a controlled release function. [0003] Textiles with aromatic smell are deeply loved by consumers. However, the composition of essence is very complex. The ingredients contained in it are mostly volatile and chemically unstable subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/16B01J13/18C11B9/00
CPCB01J13/16B01J13/185C11B9/00
Inventor 张万龙
Owner 贺州宝兴新材料股份有限公司