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Method for preparation of small-particle-size polybutadiene latex

A technology of polybutadiene latex and small particle size, applied in the field of rubber latex production, can solve problems such as long polymerization period, achieve the effects of not decreasing comprehensive performance, improving reaction speed and shortening polymerization time

Active Publication Date: 2017-06-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the polymerization cycle is longer when synthesizing small particle size polybutadiene latex, which is a technical problem that has plagued the ABS industry for many years

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 0.25 parts of sodium pyrophosphate (KR) and 0.008 parts of ferrous sulfate (KF) are mixed and complexed before use. The pressure-resistant polymerization kettle was replaced with nitrogen three times, vacuumized, and 165 parts of water, 2.2 parts of potassium oleate, 2 parts of disproportionated rosin soap, and 0.25 parts of electrolyte K were added under negative pressure. 2 CO 3 , 0.45 parts of tertiary dodecyl mercaptan (TDM), 7.5 parts of styrene, 0.2 parts of cumene hydroperoxide (KH), complex solution of sodium pyrophosphate (KR) and ferrous sulfate (KF), 0.35 parts of glucose (KE), finally add 92.5 parts of butadiene, start stirring and heat up, control the temperature of the kettle at 58 ° C, maintain the polymerization reaction for 2 hours, add 0.3 parts of potassium persulfate (KPS), 0.2 parts of ferrous chloride (FeCl 2 ), then continue to react for 3.5 hours, the polymerization pressure is reduced to 0.18MPa, and the polymerization conversion rate reaches 9...

Embodiment 2

[0022] 0.2 parts of sodium pyrophosphate (KR) and 0.008 parts of ferrous sulfate (KF) are mixed and complexed before use. The pressure-resistant polymerization kettle was replaced with nitrogen three times, vacuumized, and 155 parts of water, 2.3 parts of potassium oleate, 2 parts of disproportionated rosin soap, and 0.25 parts of electrolyte K were added under negative pressure. 2 CO 3 , 0.45 parts of tertiary dodecyl mercaptan (TDM), 7.5 parts of styrene, 0.15 parts of cumene hydroperoxide (KH), complex solution of sodium pyrophosphate (KR) and ferrous sulfate (KF), 0.3 parts of glucose (KE), finally add 92.5 parts of butadiene, start stirring and heat up, control the temperature of the kettle at 58.5 ° C, maintain the polymerization reaction for 2.5 hours, add 0.25 parts of potassium persulfate (KPS), 0.3 parts of sodium bisulfite (NaHSO 3 ), then continue to react for 4 hours, the polymerization pressure is reduced to 0.17MPa, the polymerization conversion rate reaches 96...

Embodiment 3

[0024] 0.25 parts of sodium pyrophosphate (KR) and 0.007 parts of ferrous sulfate (KF) are mixed and complexed before use. The pressure-resistant polymerization kettle was replaced with nitrogen three times, vacuumized, and 145 parts of water, 2.2 parts of potassium oleate, 2 parts of disproportionated rosin soap, and 0.25 parts of electrolyte K were added under negative pressure. 2 CO 3 , 0.45 parts of tertiary dodecyl mercaptan (TDM), 7.5 parts of styrene, 0.15 parts of cumene hydroperoxide (KH), complex solution of sodium pyrophosphate (KR) and ferrous sulfate (KF), 0.28 parts of glucose (KE), finally add 92.5 parts of butadiene, start stirring and heat up, control the temperature of the kettle at 58.5°C, maintain the polymerization reaction for 2.5 hours, add 0.20 parts of dibenzoyl peroxide and 0.90 parts of ferrous pyrophosphate, and continue the reaction After 3 hours, the polymerization pressure was reduced to 0.18 MPa, and the polymerization conversion rate reached 9...

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Abstract

The invention provides a method for rapid synthesis of a small-particle-size polybutadiene latex; in the premise of ensuring the comprehensive performance of ABS resin, the polymerization time of the small-particle-size polybutadiene latex is shortened to 4-7 hours, the polymerization time is greatly shortened, and the reaction can be rapidly and evenly performed, so that the polymerization time of a large-particle-size polybutadiene latex is shortened, the ABS resin production cycle is further shortened, and the production capacity of an ABS device is greatly improved; and at the same time, the method can reduce the polymerization temperature and decrease the polymerization pressure, and allows the polymerization to be performed in relatively stable conditions.

Description

technical field [0001] The invention relates to a method for preparing polybutadiene latex with small particle diameter, in particular to a method for quickly preparing polybutadiene latex with small particle diameter, which belongs to the technical field of rubber latex production. Background technique [0002] ABS resin is a ternary graft copolymer grafted from styrene and acrylonitrile to polybutadiene latex with large particle size (particle size is 250-350nm). Large particle size polybutadiene latex is the core component and skeleton of ABS resin, which endows ABS resin with toughness and directly affects the performance of ABS resin. Large particle size polybutadiene latex has a long synthesis cycle and high energy consumption, which seriously restricts the production efficiency of ABS resin. Shortening the polymerization time of large particle size polybutadiene latex is a key technology in the production of ABS resin. At present, the relatively advanced preparation ...

Claims

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Application Information

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IPC IPC(8): C08F236/06C08F212/08C08F4/40C08F4/38C08F2/00
Inventor 翟云芳王锋郑红兵邵卫燕鹏华胡育林史工昌赵又穆梁滔李晶赵志超王永峰王月霞
Owner PETROCHINA CO LTD
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