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Method for synthesizing alkylphenol formaldehyde curing resin in catalytic mode through organic alkali

A vulcanized resin and alkylphenol technology, which is applied in the field of alkylphenol formaldehyde vulcanized resins catalyzed by organic strong bases, can solve the problems of low methylol, poor vulcanization performance, and long working hours of vulcanized resins, and achieve good vulcanization performance, Good performance, good stability effect

Active Publication Date: 2018-02-13
RACHEM CHINA CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for neutralization and washing in this process, a lot of waste water will be generated, and the working hours will be longer
(2) Zhang Jinju's synthetic method in "Petroleum Progress in Fine Chemical Industry" 2005, Vol. The basicity of tetramine is weak, so that the synthetic vulcanization resin has a lower methylol group, resulting in poor vulcanization performance of the resin

Method used

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  • Method for synthesizing alkylphenol formaldehyde curing resin in catalytic mode through organic alkali
  • Method for synthesizing alkylphenol formaldehyde curing resin in catalytic mode through organic alkali
  • Method for synthesizing alkylphenol formaldehyde curing resin in catalytic mode through organic alkali

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the 1000ml four-neck flask with stirring, thermometer and condenser, drop into 268g p-tetraoctylphenol, 47g tetramethylammonium hydroxide aqueous solution (tetramethylammonium hydroxide content 25%), be heated to p-tetraoctylphenol Melt completely, start stirring, heat to 80°C, add 211g of liquid formaldehyde (formaldehyde content 37%) dropwise within 30 minutes, react at 80°C for 2 hours, add 268g of toluene, stir for 20min and separate layers, keep the lower water layer , the catalyst inside can be used for the next reaction; for the upper toluene resin layer, toluene is recovered at normal pressure, and after reaching 135°C, vacuumize to -0.095Mpa. Resin, resin softening point is 87.5°C.

[0022] For other Examples 2-9 and comparative examples, see Example 1 for the implementation steps, and see Table 1 for the implementation conditions.

[0023] Table 1

[0024]

[0025] As can be seen from Table 1, embodiment 1~9 is to make catalyzer with organic strong bas...

Embodiment 10

[0027] The products prepared in Examples 1, 2, 7, and 9 were used in rubber for application testing, and compared with the alkylphenol-formaldehyde vulcanized resins synthesized in Comparative Example 1 and Comparative Example 2. The formulation of the rubber composition is shown in Table 2. The test results are shown in Table 3. As can be seen from Table 3, the alkylphenol-formaldehyde vulcanized resin of the present invention, compared with Comparative Example 2, has significantly improved vulcanization properties, mechanical properties and tear resistance; compared with Comparative Example 1, each index is almost the same big.

[0028] Table 2

[0029] serial number

raw material

parts by mass

1

IIR

100.00

2

CR

5.00

3

N375

60.00

4

castor oil

6.00

5

ZnO

5.00

6

Embodiment 1,2,7,9 product, comparative example

10.00

7

B WAX

1.00

[0030] table 3

[0031]

[0032...

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Abstract

The invention discloses a preparation method for alkylphenol formaldehyde curing resin. The preparation method comprises the following steps: heating to melt alkylphenol; enabling the alkylphenol to sufficiently react with a 37% formaldehyde aqueous solution at a certain reaction temperature under action of an organic strong alkali catalyst, and separating out a water layer; and distilling a resinlayer at a certain temperature under reduced pressure, thereby obtaining the alkylphenol formaldehyde curing resin. Compared with an existing process, the alkylphenol formaldehyde curing resin synthesis process has the advantages of not needing neutralizing and washing, greatly reducing generation of wastewater and being capable of repeatedly using the catalyst in the separated-out water layer; and meanwhile, the synthesized product has relatively high hydroxymethyl, and has better vulcanization property, so that a rubber product has better performances.

Description

technical field [0001] The invention relates to a preparation method of an alkylphenol formaldehyde vulcanized resin, in particular to a method for preparing an alkylphenol formaldehyde vulcanized resin by catalyzing an organic strong base. Background technique [0002] Vulcanizing resin is a vulcanizing agent for butyl rubber, natural rubber, styrene-butadiene rubber and other rubber, especially for butyl rubber, vulcanizing with vulcanizing resin can improve the heat resistance and fatigue resistance of butyl rubber, and at the same time reduce the elongation rate and increase the tensile strength. In addition to tire technology, vulcanized resins are also widely used in rubber rollers, sealing products, adhesives and other fields. [0003] At present, the synthesis methods of alkylphenolic vulcanized resins mainly include: (1) the synthesis method of Zhao Xiangren, Wang Qiaoxian and Sun Decheng in "Chemical Industry and Engineering" 1990, No. 1, pages 23-29, the reaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/12C08L61/08C08L23/22C08L91/00C08K3/22
CPCC08G8/12C08L23/22C08L2205/035C08L11/00C08L61/06C08L91/00C08K2003/2296
Inventor 沈敏亮
Owner RACHEM CHINA CO LTD
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