Thermochromic compounding agent microcapsule suspension liquid for vulcanization of synthetic latex, and preparation method of thermochromic compounding agent microcapsule suspension liquid

A microcapsule suspension and synthetic latex technology, which is applied in the direction of microcapsule preparation, microsphere preparation, etc., can solve the problems of early vulcanization, latex stability or quality decline, etc., achieve simple steps, avoid latex stability decline, and facilitate industrial production Effect

Inactive Publication Date: 2017-01-11
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a kind of vulcanization compounding agent microcapsule suspension used in the compounding process of synthetic latex, which can be released by temperature control, to solve the latex st

Method used

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Examples

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Effect test

preparation example Construction

[0040] The present invention provides the preparation method of microcapsule suspension described in above-mentioned scheme, comprises the following steps:

[0041] Melting solid paraffin to obtain molten paraffin;

[0042] Mix the vulcanization compounding agent with molten paraffin, and the molten paraffin wraps the vulcanization compounding agent to obtain microcapsules as the oil phase;

[0043] Mix the emulsifier and water at 80-95°C to obtain a water phase;

[0044] The oil phase is added into the water phase to obtain an oil-in-water emulsion, and after cooling, a heat-induced compounding agent microcapsule suspension for synthetic latex vulcanization is obtained.

[0045] The invention melts solid paraffin to obtain molten paraffin. In the present invention, the melting temperature is preferably 80-95° C., more preferably 85-90° C.; the melting time is preferably 0.2-1 h, more preferably 0.4-0.6 h. In the present invention, the solid paraffin is preferably melted un...

Embodiment 1

[0055] Put zinc oxide into a ball mill and grind for 72 hours to prepare a zinc oxide dispersion with a solid content of 50% for use;

[0056] Put 100 g of fully refined paraffin into a three-neck flask equipped with a condenser, then raise the temperature to 95° C., melt the paraffin for 30 minutes, and stir at a speed of 300 rpm to obtain molten paraffin;

[0057] Pour 100 g of the zinc oxide dispersion into molten paraffin, and stir for 1 h at a stirring speed of 800 rpm, so that the paraffin is wrapped with zinc oxide to obtain microcapsules as the oil phase;

[0058] Add 6.0g of emulsifier Span 80, 2.0g of Tween 80, 1.0g of fatty alcohol polyoxyethylene ether, 1.0g of stearic acid and 1.0g of sodium lauryl sulfate into 200g of 95°C aqueous solution, at a stirring speed of 300rpm Stir for 30min to obtain the water phase;

[0059] Add the oil phase to the water phase dropwise, control the dropping rate to 5 drops / second, and stir for 20 minutes at a stirring speed of 1200 ...

Embodiment 2

[0063] Sulfur for vulcanizing polyisoprene latex, accelerator ZDC (zinc diethyldithiocarbamate), accelerator M (2-mercaptobenzothiazole), antioxidant 264 (2,6-di tert-butyl p-cresol) and zinc oxide were ground in a ball mill for 72 hours according to the ratio of 2.5: 1.5: 1: 1.5: 3, and prepared into a mixed compound dispersion with a solid content of 50%, for use;

[0064] Put 200 g of solid paraffin wax with a melting point of 64°C and a grade of 64# into a three-necked flask equipped with a condenser, then raise the temperature to 85°C to melt the paraffin wax for 30 minutes, and the stirring speed is 500 rpm to obtain molten paraffin;

[0065]Pour 120 g of the mixed compound dispersion into molten paraffin, and stir for 1 h at a stirring speed of 1200 rpm, so that the paraffin is wrapped with zinc oxide to obtain microcapsules as the oil phase;

[0066] Add 16.0g of emulsifier Span 80, 5.0g of Tween 80, 4.0g of fatty alcohol polyoxyethylene ether, and 3.0g of stearic acid...

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Abstract

The invention provides thermochromic compounding agent microcapsule suspension liquid for vulcanization of synthetic latex, and a preparation method of the thermochromic compounding agent microcapsule suspension liquid. The microcapsule suspension liquid can be prepared by the steps of melting solid paraffin, mixing a vulcanizing compounding agent and the melted solid paraffin, adding the mixture into an aqueous solution of an emulsifying agent, emulsifying and cooling. According to the microcapsule suspension liquid provided by the invention, the vulcanizing compounding agent can be controlled by temperature to release and the vulcanizing compounding agent is wrapped by a paraffin wall material, so the problem of reduced stability or prevulcanization of the latex caused by direct contact of vulcanizing compounding agent with latex particles is avoided, relatively high heat and mechanical stability are achieved under the condition being lower than melting point; and when the temperature of the latex reaches or exceeds the melting point of the paraffin wall material, the compounding agent can release by breaking the capsule wall and is subjected to cross-linking reaction with the latex particles, so the latex is vulcanized.

Description

technical field [0001] The invention relates to the technical field of synthetic latex vulcanization, in particular to a microcapsule suspension of thermally variable compounding agent for synthetic latex vulcanization and a preparation method thereof. Background technique [0002] Synthetic latex is an aqueous dispersion of polymer particles synthesized by emulsion polymerization. It is a homopolymer or copolymer based on a single, small ethylenically unsaturated organic compound, mainly including styrene-butadiene latex, butadiene latex, Butyl latex, neoprene latex, ethylene propylene latex, isoprene latex, nitrile latex, acrylic latex, etc. The structure of synthetic latex is similar to natural latex, but its compactness, heat resistance and aging resistance are better than natural latex, so it has a wide application prospect. [0003] Synthetic latex can be vulcanized differently from natural latex, such as using ethylenediamine or diisocyanate to vulcanize nitrile late...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K3/22C08K3/06B01J13/04
CPCC08K9/10B01J13/04C08K3/06C08K3/22C08K2003/2296
Inventor 吕明哲方蕾李普旺李永振李思东杨子明彭政罗勇悦
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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