Microencapsulated high-temperature resistant thermo-oxidating light-colored terpine resin and preparation method thereof

A terpene resin and microencapsulation technology, which is applied in the field of microencapsulated terpene resin products and its preparation, can solve problems such as darkening of color, achieve the effects of inhibiting oxidation, improving thermal oxygen stability, and simple preparation process

Active Publication Date: 2010-09-29
GUANGXI RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because terpene resin is made of pinene through low-temperature catalytic polymerization, due to the existence of double bonds and impurities, it is easily affected by conditions such as heat and light, making it darker in color during storage and high-temperature use, which seriously affects use

Method used

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  • Microencapsulated high-temperature resistant thermo-oxidating light-colored terpine resin and preparation method thereof
  • Microencapsulated high-temperature resistant thermo-oxidating light-colored terpine resin and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] Preparation steps of microcapsules

[0023] (1) Preparation of urea-formaldehyde prepolymer: urea and formaldehyde added in a reactor equipped with a stirrer and a heater, the weight ratio of 30-60% formaldehyde solution and solid urea is 1.5, every kilogram of solid urea Add 2 kg of water to dissolve, turn on the heater and stirrer, slowly drop 1mol / L NaOH into the reaction kettle, the temperature rises slowly until the temperature in the bottle reaches 70°C and the pH value of the solution is 8.0, then keep warm for 1h Then stop heating to get urea.

[0024] (2) Preparation of terpene resin emulsion: According to the ratio of adding 10 liters of cyclohexane per kilogram of terpene resin, first grind the terpene resin into powder, then add cyclohexane to stir and dissolve; add 0.4 kg of OP-10 5 liters of water were stirred and dissolved, and then the aqueous solution was poured into the terpene resin solution and stirred to fully emulsify the solution, and the emulsif...

Embodiment 2

[0029] Preparation steps of microcapsules

[0030] (1) Preparation of urea-formaldehyde prepolymer: urea and formaldehyde added in a reactor equipped with a stirrer and a heater, the weight ratio of 30-60% formaldehyde solution and solid urea is 1.0, every kilogram of solid urea Add 2 kg of water to dissolve, turn on the heater and agitator, and slowly add 0.5mol / L NaoH dropwise to the reaction kettle, and the temperature rises slowly until the temperature in the bottle reaches 70°C and the pH value of the solution is 8.0. Stop heating after 1h to obtain urea.

[0031] (2) Preparation of terpene resin emulsion: According to the ratio of adding 10 liters of cyclohexane per kilogram of terpene resin, first grind the terpene resin into powder, then add cyclohexane and stir to dissolve; in addition, 0.6 kg of dodecyl Add 5 liters of water to sodium benzenesulfonate and stir to dissolve, then pour the aqueous solution into the terpene resin solution and stir to fully emulsify the ...

Embodiment 3

[0036] Preparation steps of microcapsules

[0037] (1) Preparation of urea-formaldehyde prepolymer: Add a certain proportion (1.5, 1.25, 1.0) of urea and formaldehyde into a 250ml three-necked bottle, add an appropriate amount of water to dissolve the urea, and stir with electricity. Add an appropriate amount of 0.5mol / L NaOH dropwise to the three-necked flask to adjust the pH value of the solution to 8.0, turn on the electricity to slowly increase the temperature of the oil bath until the temperature in the bottle reaches 70°C, and start to keep warm, and stop heating after keeping warm for 1 hour.

[0038] 2) Preparation of terpene resin emulsion: take the terpene resin dissolved in toluene as the oil phase, and the O / W type stable emulsion with the aqueous solution containing Tween-80 as the water phase: weigh 3.5 g of the terpene resin ground into powder In a 150ml beaker, add an appropriate amount of toluene and stir to dissolve with a glass rod; weigh 4%-8% Tween-80 in a...

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Abstract

The invention discloses a microencapsulated high-temperature resistant thermo-oxidating light-colored terpine resin and a preparation method thereof. The preparation method comprises the following steps: preparing a carbamide-formaldehyde prepolymer, preparing a terpine resin emulsion, synthesizing a microcapsule and refining the microcapsule. In the method, the cheap urea-formaldehyde resin is used as raw materials, and the terpine resin from being in direct contact with light or air can be avoided after the terpine resin is microencapsulated so as to inhibit the oxidation of the terpine resin and improve the thermo-oxidating stability of the terpine resin. Especially, by using the method, the light-colored terpine resin can not be discolored easily at high temperature or in the condition of exposure to air for a long time.

Description

technical field [0001] The invention relates to a low-molecular thermoplastic resin and a preparation method thereof, in particular to a microencapsulated terpene resin product and a preparation method thereof. Background technique [0002] Terpene resins are some thermoplastic block copolymers, usually low-molecular thermoplastic resins. The preparation method is to use turpentine as a raw material, first isolate pinene, and then undergo cationic catalytic polymerization to obtain polymers. The common ones are α-pinene resin, β-pinene resin, dipentene resin and polymers obtained by copolymerization with other monomers, such as styrene-styrene-butadiene rubber (SBR), phenylacetic acid-isoprene-benzene Excellent tackifier for ethylene (SIS) and styrene (SBS), its tackifying performance is better than that of rosin, modified rosin and petroleum resins, such as terpene resins such as terpene-styrene resin, terpene phenolic resin, etc. Thermoplastic block copolymer has the adva...

Claims

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Application Information

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IPC IPC(8): B01J13/16C08L45/00C08L61/24
Inventor 熊德元莫炳荣刘雄民黄科林李艳琳李伟光
Owner GUANGXI RES INST OF CHEM IND CO LTD
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