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Process for preparing high styrene rubber

A high-styrene rubber and high-styrene resin technology, which is applied in the field of direct synthesis of high-styrene rubber, can solve problems such as large differences, imperfect process synthesis technology, and unapproved application fields.

Inactive Publication Date: 2009-12-30
中国石油兰州化学工业公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its process synthesis technology is not perfect, especially the coagulation drying process is quite different from the industrial technology, and its product technical indicators, processing performance and product appearance have a certain gap with the co-coagulation method. The product has not been recognized in the application field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0045] Embodiment 1~4: Step 1: preparation water phase

[0046] Example 1

[0047] Step 2: Prepare the active phase

[0048] Example 1

[0049] Step 3: Synthesis of SBR Emulsion

[0050] First to a 12M 3 Vacuumize the polymerization kettle, put in the reactants in the following weight proportions in turn, and stir evenly

[0051] Example 1

[0052] After adding the initiator, initiate the polymerization reaction, control the reaction temperature at 15-35°C, and add the secondary material when the conversion rate of butadiene reaches 25-35%, as shown in the following table

[0053] Example 1

[0054] When the conversion rate of butadiene reaches 55-65%, add materials three times, including the remaining water phase and molecular weight regulator and styrene (the amount added is as follows), and continue the reaction

[0055] Example 1

[0056] Continue to maintain the reaction after adding the material. Water is us...

Embodiment 5～8

[0058] Step 1: Prepare the water phase (same as above)

[0059] Step 2: Preparation of activated phase (same as above)

[0060] Step 3: Synthesis of High Styrenic Resin Emulsion

[0061] First to a 12M 3 Vacuumize the polymerization kettle, put in the reactants in the following weight proportions in turn, and stir evenly

[0062] Example 5

Example 6

Example 7

Example 8

Deionized water

140

130

120

100

Partial water phase

4 / 5 of the water phase

2 / 3 of the water phase

4 / 5 of the water phase

11 / 15 of the water phase

Styrene

60

61

62

63

Butadiene

10.5

11

11

11.5

tertiary dodecyl mercaptan

25% of the total (total

amount is 0.65)

25% of the total (total

amount is 0.2)

25% of the total (total

amount is 0.3)

25% of the total (total

amount is 0.5)

active phase

all

all

all

a...

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PUM

PropertyMeasurementUnit
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Abstract

The invention discloses a preparing method of high-phenylethene rubber, which comprises the following steps: adapting normal temperature emulsion multi-stage polymerization pattern; using styrene and butadiene as polymerization monomer; adding aqueous phase, activating phase, molecular weight modifier, deionized water and initiator to polymerize SBR emulsion or high-phenylethene resin emulsion; supplementing monomer and molecular weight modifier to continue the reaction; synthesizing high-phenylethene rubber emulsion directly; aggregating; drying to produce high-phenylethene rubber.

Description

technical field [0001] A preparation method for high styrene rubber, in particular to a preparation method for directly synthesizing high styrene rubber. Background technique [0002] High styrene is a copolymer composed of butadiene and styrene. If the combined styrene content increases, a resin copolymer with less elasticity and greater plasticity will be obtained; otherwise, a rubber-like copolymer with greater elasticity and less plasticity will be obtained. thing. Usually, those with a bound styrene content between 45 and 70% in the molecular structure are called high-styrene rubbers, and those with bound styrene content above 70% are called high-styrene resins. The salient feature of high styrene rubber is its high hardness, good strength, and the physical properties of rubber. When used in combination with various synthetic rubber or natural rubber, it can improve the rigidity, hardness, wear resistance and reduce shrinkage of rubber products. High efficiency and ot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F2/22
Inventor 杨瑞祥牛卫东陈铧史广全杨蜀黔王津生陆永卫李生伟吕锋张晓东
Owner 中国石油兰州化学工业公司