CN1406663A - Foaming agent of p-toluenesulfonamide and preparing process - Google Patents
Foaming agent of p-toluenesulfonamide and preparing process Download PDFInfo
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- CN1406663A CN1406663A CN01128779.9A CN01128779A CN1406663A CN 1406663 A CN1406663 A CN 1406663A CN 01128779 A CN01128779 A CN 01128779A CN 1406663 A CN1406663 A CN 1406663A
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- Prior art keywords
- blowing agent
- unifor
- semicarbazides
- tosyl
- toluene
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A p-toluenesulfonylamine urea as foaming agent for preparing high-temp plastic or rubber products is prepared from toluene through chlorosulfonacting, acidifying and addition reacting with cyanate compound. Its advantages are high purity (not less than 90%) and high decomposing temp (215-228 deg.C).
Description
The present invention relates to a kind of right-tosyl semicarbazides blowing agent and preparation method thereof, can be used for using when higher plastics of processing temperature or rubber clone prepare foamed product.It mainly is by synthetic method, with toluene, chlorosulfonation, acidifying, makes with the cyanate compound addition again.
At present, the plastics now produced of China, rubber are essentially azodicarbonamide foaming agent (being called for short AC or ASDAC) with blowing agent.Because its decomposition temperature is lower, so be not suitable for the production of higher plastics of processing temperature and rubber clone foamed product.Be suitable for inadequately as production plastic foam products such as polypropylene, nylon, Merlon.
For fear of the deficiencies in the prior art part, the present invention proposes a kind of blowing agent required when the higher polymer kind of melt temperature is prepared as foaming product and preparation method thereof that is applicable to.The blowing agent that the present invention proposes is the non-polluting blowing agent, can be able to be applicable to the high foaming product of preparation health conditions requiring.
Technical scheme proposed by the invention is characterised in that: adopt toluene, chlorosulfonic acid is made right-tosyl semicarbazides, chemical structural formula is:
Right-tosyl semicarbazides is made through following steps by synthetic method:
1, toluene is added on carries out chlorosulfonation in the chlorosulfonic acid and separate again, wash then, filter and promptly obtain the paratoluensulfonyl chloride intermediate products;
2, with paratoluensulfonyl chloride and hydrazine after acylation reaction, make product unifor sufficient crystallising, filter and be drying to obtain the unifor intermediate products then;
3, with unifor and cyanogen acidulants after addition reaction, carry out promptly obtaining after the operations such as precipitating, washing, filtration, drying product right-tosyl semicarbazides blowing agent.
Description of drawings: Fig. 1: synthesis step schematic diagram
The present invention will be in conjunction with the embodiments (accompanying drawing) be further described:
1, toluene is added in the chlorosulfonic acid, under agitation reacted 1 hour, after chlorosulfonation, it is added in the reagent separates, wash then, filter and promptly obtain the paratoluensulfonyl chloride intermediate products;
2, paratoluensulfonyl chloride and hydrazine are under agitation reacted after acylation reaction in the medium neutralization, make product unifor sufficient crystallising, filter and be drying to obtain the unifor intermediate products then;
3, unifor and cyanogen acidulants are under agitation reacted in the medium neutralization, after addition reaction, carry out promptly obtaining after the operations such as precipitating, washing, filtration, drying product right-tosyl semicarbazides blowing agent.
The present invention's advantage compared to existing technology is:
Right-toluene sulfonylsemicarbazide blowing agent is the non-polluting blowing agent, can be used for preparing PP foam material, can be used for system The goods of standby interior decoration, the packaging material of expensive goods and be used for packaging material for food. Product purity is not less than 90%, decomposes Temperature is 215～228 ℃.
Claims (2)
1, a kind of right-tosyl semicarbazides blowing agent, it is characterized in that: adopt toluene, chlorosulfonic acid, hydrazine cyanogen acidulants is made right-tosyl semicarbazides, chemical structural formula is:
2, a kind of preparation claim 1 described right-preparation method of tosyl semicarbazides blowing agent, it is characterized in that: make through following steps by synthetic method:
A, toluene is added on carries out chlorosulfonation in the chlorosulfonic acid and separate again, wash then, filter and promptly obtain the paratoluensulfonyl chloride intermediate products;
B, with paratoluensulfonyl chloride and hydrazine after acylation reaction, make product unifor sufficient crystallising, filter and be drying to obtain the unifor intermediate products then;
C, with unifor and cyanogen acidulants after addition reaction, carry out promptly obtaining after the operations such as precipitating, washing, filtration, drying product right-tosyl semicarbazides blowing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01128779.9A CN1406663A (en) | 2001-09-06 | 2001-09-06 | Foaming agent of p-toluenesulfonamide and preparing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01128779.9A CN1406663A (en) | 2001-09-06 | 2001-09-06 | Foaming agent of p-toluenesulfonamide and preparing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1406663A true CN1406663A (en) | 2003-04-02 |
Family
ID=4668608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01128779.9A Pending CN1406663A (en) | 2001-09-06 | 2001-09-06 | Foaming agent of p-toluenesulfonamide and preparing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1406663A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106928099A (en) * | 2017-04-27 | 2017-07-07 | 重庆丽澄环保科技有限公司 | A kind of synthetic method of benzene sulfonyl hydrazide |
| CN108002732A (en) * | 2017-12-20 | 2018-05-08 | 陈良培 | A kind of preparation method to tert-butyl benzene sulfonamide type concrete foamer |
| CN110642758A (en) * | 2019-09-05 | 2020-01-03 | 浙江杰上杰新材料有限公司 | Synthetic method of p-toluenesulfonyl semicarbazide foaming agent |
| CN116375610A (en) * | 2023-04-06 | 2023-07-04 | 嘉兴市金利化工有限责任公司 | P-toluenesulfonyl semicarbazide preparation system and preparation process |
-
2001
- 2001-09-06 CN CN01128779.9A patent/CN1406663A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106928099A (en) * | 2017-04-27 | 2017-07-07 | 重庆丽澄环保科技有限公司 | A kind of synthetic method of benzene sulfonyl hydrazide |
| CN108002732A (en) * | 2017-12-20 | 2018-05-08 | 陈良培 | A kind of preparation method to tert-butyl benzene sulfonamide type concrete foamer |
| CN110642758A (en) * | 2019-09-05 | 2020-01-03 | 浙江杰上杰新材料有限公司 | Synthetic method of p-toluenesulfonyl semicarbazide foaming agent |
| CN116375610A (en) * | 2023-04-06 | 2023-07-04 | 嘉兴市金利化工有限责任公司 | P-toluenesulfonyl semicarbazide preparation system and preparation process |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |