Preparing method of microcapsules capable of coating hindered amine stabilizer, hindered phenolic stabilizer and organic dye together

A technology of hindered amines and hindered phenols, applied in the direction of microcapsule preparation, microsphere preparation, etc., can solve the problems of attack damage and hydroxide attack damage, and achieve the effect of uniform coating

Active Publication Date: 2017-09-08
天津晶润锐拓科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, hindered amine light stabilizers are weakly alkaline, and hindered phenolic antioxidants are weakly acidic. In most mature microcapsule coating technologies, it is necessary to adjust the pH of the system from alkaline to acidic to ensure that the capsule wall The material is deposited on the surface of the core material from the solution system, and then forms microspheres. In the initial alkaline syst

Method used

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  • Preparing method of microcapsules capable of coating hindered amine stabilizer, hindered phenolic stabilizer and organic dye together
  • Preparing method of microcapsules capable of coating hindered amine stabilizer, hindered phenolic stabilizer and organic dye together

Examples

Experimental program
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Example Embodiment

[0028] Example 1

[0029] A method for preparing microcapsules jointly coated with hindered amine stabilizers, hindered phenol stabilizers and organic dyes, which comprises the following steps:

[0030] (1) Benzidine yellow H10G: hindered amine light stabilizer Tinuvin770 [scientific name (bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate)]: hindered phenol antioxidant 264 [Scientific name 2,6-di-tert-butyl-p-cresol] After mixing at a weight ratio of 3:1:1, fully dissolve it with 10 parts of acetone;

[0031] (2) Pour the solution in step (1) into 40 parts of hydrophobic fumed nano silica particles (Hydrophobic-260 type), fully absorb it, and dry at room temperature. After the surface of the silica particles is dry, put it in a vacuum Vacuum in the oven and dry at 40℃ for 2h;

[0032] (3) The silica particles obtained in step (2) are poured into a mill containing pure water and a dispersant to grind and disperse, filtered and dried. Subsequently, the dried silica particles are added t...

Example Embodiment

[0040] Example 2

[0041] The microcapsules prepared in Example 1 were added to the screen printing ink and screen printed on the plastic substrate to obtain product A. In addition, take the same content of benzidine yellow H10G, hindered amines and hindered phenol stabilizers without coating, and directly connect them to the screen printing ink for screen printing to obtain product B; use Q-SUN Xe-1 Xenon Test Chamber xenon lamp The aging test box was tested and found that the light stable life of the dye in product B was 240 hours, while the light stable life of the dye in product A was increased to 530 hours.

Example Embodiment

[0042] Example 3

[0043] The microcapsules prepared in Example 1 were added to PVC powder, and the mixing experiment was carried out at 170 degrees using an injection molding machine. The test results show that the microcapsules produced by this patented technology can remain stable under the conditions of high temperature and high shearing force. The HCl gas decomposed by PVC under the protection of the capsule shell does not damage the structure of the benzidine yellow H10G molecule inside the capsule. The PVC mixture formed is still yellow.

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Abstract

The invention discloses a preparing method of microcapsules capable of coating hindered amine stabilizer, hindered phenolic stabilizer and organic dye together. The preparing method includes the following steps that (1) the organic dye, the hindered amine stabilizer and the hindered phenolic stabilizer are dissolved into volatile organic solvent; (2) the solution in the step (1) is poured into silicon dioxide to be adsorbed, then the volatile organic solvent is completely volatilized; (3) silicon dioxide particles in the step (2) are added into a water-phase system and paraffin mixture containing emulsifier, heating is conducted until paraffin is melted, and an emulsion is prepared after high-speed stirring and dispersing, wherein the disperse phase is paraffin liquid droplets wrapping the silicon dioxide particles; (4) the mixed solution of melamine-formaldehyde prepolymer and water is slowly added into the emulsion prepared in the step (3) dropwise under the stirring condition, the pH value is adjusted, the mixture is heated so that the melamine-formaldehyde prepolymer can be polymerized and separated on the surfaces of the paraffin liquid droplets to obtain a microcapsule wall material; the microcapsules are obtained after cleaning and drying.

Description

technical field [0001] The invention belongs to the technical field of organic dye applications, and in particular relates to a preparation method of microcapsules that jointly coat hindered amine stabilizers, hindered phenol stabilizers and organic dyes. Background technique [0002] Organic dyes are one of the most important colorants due to their wide variety, bright colors, high tinting strength and excellent application performance. However, the light resistance, heat resistance, solvent resistance and migration resistance of some varieties are often inferior to inorganic pigments. Microencapsulation technology is a tiny sealed capsule. Microencapsulation technology refers to the technology of using natural or synthetic polymer materials to coat active substances in solid, liquid or gas to form tiny particles, and the particle size is generally in the range of 0.1-1000 μm. Encapsulation of organic dye molecules can isolate it from chemical environments such as acids, ...

Claims

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Application Information

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IPC IPC(8): B01J13/04C08G12/32
CPCB01J13/025B01J13/04C08G12/32
Inventor 郭志超毛国柱韩文祥郭炽杨松王宝冬王欣池
Owner 天津晶润锐拓科技发展有限公司
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