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Manufacturing method of melamine microcapsule

A technology of melamine and manufacturing method, which is applied in the direction of microcapsule preparation, microcapsule, microsphere preparation, etc., can solve the problems of poor specific gravity, weakened effect, poor stability of capsule dispersion, etc., and achieve the effect of reducing the residual amount of formaldehyde

Inactive Publication Date: 2014-01-15
株式会社大河曼泰克
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, if a compound having an amine group or an alcoholic hydroxyl group is excessively added after the melamine microcapsules are produced, the functionality of the core substance, which functions as the core of the microcapsules, decreases due to the low concentration of the microcapsules in the equivalent comparison. , so in order to reflect the same effect, only melamine microcapsules are added
As a result, the effect of reducing residual formaldehyde is weakened, yet in said Korean Patent No. 10-0634492 there is no mention of the efficacy of the core substance of the microcapsules
[0009] And, in order to reduce the harmful substance formaldehyde in the melamine microcapsule dispersion liquid, in the Japanese Laid-Open Patent Publication 2005-95775, used activated carbon, silica gel (Silica-gel), zeolite (Zeolite), diatomaceous earth, Calcined talc and other porous hydrophilic inorganic particles with a very large specific surface area, however, if implemented in accordance with this, due to the large specific gravity difference with the melamine microcapsule dispersion, precipitation will occur within a few days, etc. Poor stability of capsule dispersion

Method used

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  • Manufacturing method of melamine microcapsule

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0081] Add 10 g of melamine, 40 g of distilled water, 20 g of formaldehyde solution, and 0.05 g of sodium hydroxide to a 1 L four-neck flask to adjust the pH to 9, add 21 g of diethylenetetramine (polyamine), and stir at 80°C The melamine-formaldehyde prepolymer (Prepolymer) was produced in 30 minutes. As the aqueous formaldehyde solution, an aqueous solution containing 35% by weight of formaldehyde relative to 100% by weight of the aqueous formaldehyde solution was used.

[0082] In another 1L beaker, ethylene-maleic acid copolymer resin (trade name: EMA-31, product of Monsanto Co., Ltd.) was alkalized with sodium hydroxide to produce 200 g of an emulsifier, which acts as an anionic surfactant, and then added to it 100 g of rose oil was added as a capsule core substance, and stirred at a speed of 3,000 rpm for about 10 minutes using a high-speed mixer to manufacture an oily / watery (O / W) emulsion. The emulsifier contained 5% by weight of ethylene-maleic acid copolymer resin r...

experiment example 2

[0085] Add 10 g of melamine, 40 g of distilled water, 20 g of formaldehyde solution, and 0.05 g of sodium hydroxide to a 1 L four-neck flask to adjust the pH to 9, add 7 g of diethylenetetramine (polyamine), and stir at 80°C The melamine-formaldehyde prepolymer (Prepolymer) was produced in 30 minutes. As the aqueous formaldehyde solution, an aqueous solution containing 35% by weight of formaldehyde relative to 100% by weight of the aqueous formaldehyde solution was used. The stirring is performed at a speed of 100 rpm.

[0086] In another 1L beaker, ethylene-maleic acid copolymer resin (trade name: EMA-31, product of Monsanto Co., Ltd.) was alkalized with sodium hydroxide to produce 200 g of an emulsifier, which acts as an anionic surfactant, and then added to it 100 g of rose oil was added as a capsule core substance, and stirred at a speed of 3,000 rpm for about 10 minutes using a high-speed mixer to manufacture an oily / watery (O / W) emulsion. The emulsifier contained 5% by...

experiment example 3

[0090]Add 10 g of melamine, 40 g of distilled water, 20 g of formaldehyde solution, and 0.05 g of sodium hydroxide to a 1 L four-neck flask to adjust the pH to 9, add 7 g of diethylenetetramine (polyamine), and stir at 80°C The melamine-formaldehyde prepolymer (Prepolymer) was produced in 30 minutes. As the aqueous formaldehyde solution, an aqueous solution containing 35% by weight of formaldehyde relative to 100% by weight of the aqueous formaldehyde solution was used. The stirring is performed at a speed of 100 rpm.

[0091] Ethylene-maleic acid copolymer resin (trade name: EMA-31, product of Monsanto Co., Ltd.) was basified with sodium hydroxide in a separate 1 L beaker. An emulsification functioning as an anionic surfactant was produced by basifying with sodium hydroxide. 200 g of the preparation, and 100 g of rose oil as a capsule core substance was added thereto and stirred at a speed of 3,000 rpm for about 10 minutes using a high-speed mixer to manufacture an oily / wate...

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Abstract

The invention relates to a manufacturing method of melamine microcapsule, comprising the following steps: adding melamine, formalin and basic hydroxide and adjusting the pH to 8 to 10, and adding polyamine compound having at least two amine groups for reaction to form a melamine-methyl aldehyde prepolymer; using the basic hydroxide to basify more than one resin selected from an ethylene-maleic acid copolymer resin and a styrene-maleic acid copolymer resin to form an emulgator; putting a sac core substance into the emulgator for stirring to form an oily / aquiform emulsion; mixing the melamine-methyl aldehyde prepolymer with oily / aquiform emulsion and reacting under 40 to 80 DEG C; putting into a product of the abovementioned reaction a compound that reacts with methyl aldehyde and reacting under 40 to 80 DEG C; and putting into the product of the abovementioned reaction a metal or a metal compound that reacts with methyl aldehyde and reacting under 40 to 80 DEG C.

Description

technical field [0001] The invention relates to a method for manufacturing microcapsules, in particular to a method for manufacturing melamine-based microcapsules which can minimize the residual formaldehyde while maintaining the efficacy of the core substance in the capsule. Background technique [0002] For the microencapsulation method, the type of capsule wall material (or capsule wall material) is determined according to the type of capsule core material to be protected from the external environment and the physical properties required for the microcapsule, and a capsule suitable for this is used. method. [0003] As the core material that can be made into microcapsules, there are many functional substances including spices, drugs, resins, inks, oils, phase change materials (phase change materials; PCM), phytoncide, dyes, insecticides, etc. . [0004] As the wall material of microcapsules, melamine, gelatin, urethane, urea, and chitosan are usually used according to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/18C11B9/00C08G12/32
CPCA61K9/5015A61K9/5031A61K9/5089A61K47/02
Inventor 梁桐演金贤车承宦
Owner 株式会社大河曼泰克
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