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Method for preparing polyurethane skincare microcapsule

A technology of microcapsules and polyurethane, which is applied in the direction of microcapsule preparation, preparation of microspheres, textiles and papermaking, etc. It can solve the problems of non-conformity with ecological and environmental protection, and achieve the effect that the reaction conditions are easy to meet, the operation is simple, and the raw materials are simple and easy to obtain.

Inactive Publication Date: 2009-03-25
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can also be seen from the above-mentioned published documents that the preparation of microcapsules has mostly adopted organic solvents such as cyclohexane, acetone, chloroform, cyclohexanone or carbon tetrachloride as reaction solvents. Today, with emphasis on product economy, the use of these solvents obviously does not meet the requirements of ecological environmental protection

Method used

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  • Method for preparing polyurethane skincare microcapsule
  • Method for preparing polyurethane skincare microcapsule
  • Method for preparing polyurethane skincare microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0029] Mix 6.0g of olive oil and 5.0g of TDI evenly, and slowly add them into 150ml of water containing 1.7g of polyvinyl alcohol at a series of temperatures (as shown in the table below), and stir (3000rpm) while adding, until emulsified to a uniform dispersion In the system, slowly add 9.0g PEG and 0.02g catalyst triethylenediamine, stir at 10°C for 30min, then raise the temperature to 70°C, add 1ml chain extender ethylene glycol and react for 1 hour to obtain the product. The test results are shown in Table 1.

[0030] It can be seen from the table below that the initial temperature of the reaction should be controlled to reduce the occurrence of side reactions or excessive reactions, so as to obtain more polyurethane skin care microcapsules.

[0031] Table I

[0032]

[0033] 2. The influence of PEG molecular weight

Embodiment 5～7

[0035] After mixing 10.0g olive oil and 5.5g TDI evenly, slowly add it into 150ml water containing 5.2g polyvinyl alcohol at 10°C, stir while adding (3000rpm), when emulsified to a uniform dispersion system, slowly add 9.0g of PEG with a series of molecular weights (as shown in the table below) and 0.02g of catalyst triethylenediamine were stirred at 10°C for 30 minutes, then the temperature was raised to 70°C, and 1ml of chain extender ethylene glycol was added to react for 1 hour to obtain the product. The obtained product is suction-filtered, washed, and dried below 80°C to obtain micron-sized microcapsules.

[0036] Dissolve the sample with anhydrous alcohol, oscillate under ultrasonic waves, after the particles are evenly distributed, take a sample and drop it on the sample stage, and observe it under a scanning electron microscope after the alcohol evaporates to dryness. It was found that the surface of the prepared microcapsules became denser and smoother with the incre...

Embodiment 8～10

[0041] After mixing 8.0g of olive oil and 5.2g of TDI evenly, slowly add it into 150ml of water containing 2.6g of polyvinyl alcohol at 10°C, and stir at a series of rotational speeds (as shown in the table below), when it is emulsified to a uniform dispersion system , slowly add 9.0g PEG and 0.02g catalyst triethylenediamine, stir at 10°C for 30min, then raise the temperature to 70°C, add 5ml chain extender ethylene glycol to react for 1 hour, and the product is obtained. The test results are shown in Table 3.

[0042] It can be seen from the table below that due to the non-uniform magnetic stirring speed and low rotational speed, a small amount of microcapsules can be produced because the speed of magnetic stirring is not enough to meet the emulsification requirements; as the speed increases, the microcapsule particles decrease and the size distribution is uniform.

[0043] Table three

[0044]

[0045] 4. Preparation of microcapsules ...

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Abstract

The invention relates to the field of function finishing of the fabrics, in particular to a method for preparing polyurethane skin-protecting micro-capsule. The method comprises the following steps: mixing the oil-soluble skin-protecting substance and fatty group or aromatic vulcabond according to the ratio of 1-3:1, and adding the mixture into water solution containing an emulsifying agent at the rotation speed of 1000-10000rpm, emulsifying until the solution becomes an even emulsified disperse system, then adding the poly-diatomic alcohol and catalyzer slowly, stirring for 20-40 minutes at the temperature of 0-30 DEG C, then heating to 60-90 DEG C, and adding 1-5ml chain-extension agent and keeping for 0.5-2 hours to obtain the micro-capsule solution. The synthetic method adopted by the invention does not use any organic solvent. The invention leads the fabrics to have functions of nourishing and moistening as the cosmetics. Furthermore, the raw materials are easy to acquire, the utilization rate is high, the reaction conditions are easy to satisfy and the operation is simple.

Description

technical field [0001] The invention relates to the field of textile functional finishing, in particular to a preparation method of polyurethane skin care microcapsules. Background technique [0002] Microcapsule (Microcapsule) technology refers to the use of natural or synthetic polymer materials to coat the target object in it to form a tiny container with a core-shell structure with a diameter ranging from several to hundreds of microns, or even thousands of microns. It can keep the unstable core material for a long time, and it can also separate several components that would interact with each other. This performance plays a particularly important role in the textile post-treatment process. Compared with other methods, microcapsule finishing technology is less expensive and more efficient, so it has received widespread attention. [0003] Nowadays, as people's awareness of their own health care is increasing, at the same time, with the development of industry, environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M23/12D06M13/224D06M13/165D06M13/00D06M15/564B01J13/18
Inventor 邵建中董利敏王锋吴颖喆
Owner ZHEJIANG SCI-TECH UNIV
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