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Preparation method of embedding amines active substance microcapsule and applications thereof
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A technology of active substances and microcapsules, which is applied in the field of chemical composite material preparation and electronic device packaging materials, can solve the problems of long packaging time and difficult quality control, and achieve the effects of short reaction time, short preparation time and simple technical process
Inactive Publication Date: 2010-06-02
JIANGNAN UNIV +1
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Problems solved by technology
When used in the packaging of electronic devices, due to the small amount used on each device, it is difficult to mix the two parts effectively. At the same time, the packaging time is long, and some parts may have reacted, so the overall quality is difficult to control.
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Embodiment 1
[0019] Step 1: Add 160g of urea and 200mL of 37% formaldehyde to the three-necked bottle at room temperature, mix well and heat to 40°C, add diethanolamine to adjust the pH to 7, put the three-necked bottle in a 75°C oil bath, React to the predetermined time (1 hour). Take out the three-neck bottle to obtain viscous and transparent urea-formaldehyde prepolymer.
[0020] The second step: Weigh 80g of amine active substances, 120g of water, 30g of sodium chloride, and 3g of OP-10 emulsifier, and add them to the three-necked flask in turn, fully stir and emulsify, and measure an appropriate amount of the urea-formaldehyde pre-preparation obtained in the first step. Polymer solution, keeping the skin-to-core ratio (volume ratio) at 10:5, after vigorously stirring for 15 minutes, add the catalyst dropwise at a certain speed (the catalyst is hydrochloric acid and saturated ammonium chloride solution with a volume ratio of 1:9), so that the system The pH gradually decreased, and the...
Embodiment 2
[0022] Step 1: Add 200g of phenol and 200mL of 37% formaldehyde to the three-necked bottle at room temperature, mix well and heat to 40°C, add diethanolamine to adjust the pH to 8, put the three-necked bottle in a 75°C oil bath, React to the predetermined time (1 hour). Take out the three-necked bottle to obtain viscous and transparent phenolic prepolymer.
[0023] The second step: Weigh 80g of amine active substances, 120g of water, 30g of sodium chloride, and 3g of OP-10 emulsifier, and add them to the three-necked flask in turn, fully stir and emulsify, and measure an appropriate amount of the phenolic preform obtained in the first step. Polymer solution, keeping the skin-to-core ratio (volume ratio) at 10:5, after vigorously stirring for 15 minutes, add the catalyst (hydrochloric acid and saturated ammonium chloride solution at a volume ratio of 1:9) dropwise at a certain speed, so that the pH of the system gradually Decrease, control the temperature to 30°C, when the pH ...
Embodiment 3
[0025] Weigh 100g of epoxy resin water and 2g of urea-formaldehyde microcapsules, stir them thoroughly, and place them at 40°C for 30 days, no change in viscosity is measured. Further heating above 120°C for 4 hours, the epoxy resin water has been completely cured.
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Abstract
A method for preparing microcapsules embedded with amines active substance and application are provided, which belong to fields of chemical composite material preparation and electronic device packaging material. In the method, polymer with urea and formaldehyde or phenolic aldehyde and formaldehyde as condensation reaction monomers is used as the wall material of the microcapsules, amines substance as core material and the volume ratio of the wall material / the core material is of 10:3-10:8. Firstly, water-soluble urea-formaldehyde phenolic aldehyde preformed polymer is prepared by condensation reaction, and then microcapsules embedded with amines active substance is prepared by direct in-site polymerization. microcapsulation process and microcapsule size and can be controlled by regulating pH of the system and amount of emulsifying agent, and varying catalyst and reaction time. The prepared microcapsules have good strength at a pH value of 3.5, impermeability and sealability at the room temperature, and can be compounded with the epoxy resin and applied in electronic device packaging material.
Description
technical field [0001] The invention discloses a preparation method of microcapsules embedded with amine active substances and its application in electronic device packaging materials, belonging to the fields of chemical composite material preparation and electronic device packaging materials. Background technique [0002] Microcapsule technology can be widely used in the protection of food and active substances, and has been widely used in drug embedding, pesticide preparations, reversible thermochromic dyes and other fields. Electronic device packaging materials, such as epoxy resin systems, generally use two components at home and abroad. The main part is epoxy resin with a certain molecular weight, and the other part is curing agent. Before use, the two parts need to be fully mixed, and then heated at a certain temperature down for curing. When used in the packaging of electronic devices, due to the small amount used on each device, it is difficult to effectively mix th...
Claims
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Application Information
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