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Sulfonic acid curing agent for casting resin and preparation method of same

A casting resin and curing agent technology, applied in the preparation of sulfonic acid, organic chemistry, etc., can solve the problems of large amount of waste water, long preparation time, unsatisfactory production efficiency and environmental protection requirements, etc., and achieves high curing activity and fast curing speed. , the effect of broad market application prospects

Inactive Publication Date: 2016-12-07
霍山县忠福硅溶胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing sulfonic acid curing agent takes a long time to prepare, produces a lot of waste water, and the production efficiency and environmental protection requirements are not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A sulfonic acid curing agent for casting resin comprises the following raw materials by weight: 85 parts of xylene, 840 parts of concentrated sulfuric acid, and 1040 parts of methanol.

[0016] The preparation method of above-mentioned sulfonic acid curing agent for casting resin, comprises the following steps:

[0017] (1) in the reactor, add dimethylbenzene;

[0018] (2) the vitriol oil is pumped into the header tank, slowly added in the reactor;

[0019] (3) Adjust the temperature to 55-60°C, keep warm for 30min; add steam to heat up to 75-80°C, keep warm for 20min, then heat up to 90-100°C, keep warm for 50min, pass cooling water, make the temperature less than 45°C, keep warm 20min;

[0020] (4) Slowly add methanol into the reaction kettle and stir evenly.

[0021] Wherein, in step (2), in the process of adding the concentrated sulfuric acid, it is ensured that the temperature is less than 60°C.

Embodiment 2

[0023] A sulfonic acid curing agent for casting resin comprises the following raw materials in parts by weight: 90 parts of xylene, 850 parts of concentrated sulfuric acid, and 1050 parts of methanol.

[0024] The preparation method of above-mentioned sulfonic acid curing agent for casting resin, comprises the following steps:

[0025] (1) in the reactor, add dimethylbenzene;

[0026] (2) the vitriol oil is pumped into the header tank, slowly added in the reactor;

[0027] (3) Adjust the temperature to 55-60°C, keep warm for 30min; add steam to heat up to 75-80°C, keep warm for 20min, then heat up to 90-100°C, keep warm for 50min, pass cooling water, make the temperature less than 45°C, keep warm 20min;

[0028] (4) Slowly add methanol into the reaction kettle and stir evenly.

[0029] Wherein, in step (2), in the process of adding the concentrated sulfuric acid, it is ensured that the temperature is less than 60°C.

Embodiment 3

[0031] A sulfonic acid curing agent for casting resin comprises the following raw materials by weight: 95 parts of xylene, 860 parts of concentrated sulfuric acid, and 1060 parts of methanol.

[0032] The preparation method of above-mentioned sulfonic acid curing agent for casting resin, comprises the following steps:

[0033] (1) in the reactor, add dimethylbenzene;

[0034] (2) the vitriol oil is pumped into the header tank, slowly added in the reactor;

[0035] (3) Adjust the temperature to 55-60°C, keep warm for 30min; add steam to heat up to 75-80°C, keep warm for 20min, then heat up to 90-100°C, keep warm for 50min, pass cooling water, make the temperature less than 45°C, keep warm 20min;

[0036] (4) Slowly add methanol into the reaction kettle and stir evenly.

[0037] Wherein, in step (2), in the process of adding the concentrated sulfuric acid, it is ensured that the temperature is less than 60°C.

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Abstract

The invention relates to a sulfonic acid curing agent for casting resin, which includes the following raw materials, by weight, 85-95 parts of dimethyl benzene, 840-860 parts of concentrated sulfuric acid, and 1040-1060 parts of methanol. A preparation method includes the steps of: 1) adding the dimethyl benzene into a reaction kettle; 2) pumping the concentrated sulfuric acid into an overhead tank, and slowly adding the concentrated sulfuric acid into the reaction kettle; 3) regulating the temperature to 55-60 DEG C and maintaining the temperature for 30 min, feeding vapor to increase the temperature to 75-80 DEG C and maintaining the temperature for 20 min, increasing the temperature to 90-100 DEG C and maintaining the temperature for 50 min, feeding cooling water to reduced the temperature to lower than 45 DEG C and maintaining the temperature for 20 min; and 4) slowly adding the methanol into the reaction kettle with uniform stirring. The preparation method has high production efficiency and is free of generation of industrial waste water, thereby reducing pollution. The sulfonic acid curing agent has high curing activity and high curing speed.

Description

technical field [0001] The invention relates to a production method of a curing agent, in particular to a sulfonic acid curing agent for casting resin and a preparation method thereof. Background technique [0002] At present, the commonly used sulfonic acid curing agent for furan resin in the industry is an aqueous solution of p-toluenesulfonic acid, which is prepared by sulfonation, detoluene removal, translocation crystallization and separation of toluene under the action of a catalyst. bit substitution. The existing sulfonic acid curing agent takes a long time to prepare, generates a large amount of waste water, and has unsatisfactory production efficiency and environmental protection requirements. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a sulfonic acid curing agent for casting resin with high production efficiency and environmental protection and a preparation method thereof. [0004] In order to achieve the above object,...

Claims

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Application Information

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IPC IPC(8): C07C303/06C07C309/30
CPCC07C303/06C07C309/30
Inventor 杜忠福杨德军
Owner 霍山县忠福硅溶胶有限公司
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