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Found results for
 patents
1.
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A METHOD FOR THE PREPARATION OF POLY(PHENYLENE SULFIDE)
| Application Number |
PL2021050018 |
| Publication Number |
2021/201707 |
| Status |
In Force |
| Filing Date |
2021-03-25 |
| Publication Date |
2021-10-07 |
| Owner |
- SIEĆ BADAWCZA ŁUKASIEWICZ - INSTYTUT CIĘŻKIEJ SYNTEZY ORGANICZNEJ "BLACHOWNIA" (Poland)
- GRUPA AZOTY POLSKIE KONSORCJUM CHEMICZNE SP. Z O. O. (Poland)
- GRUPA AZOTY KOPALNIE I ZAKŁADY CHEMICZNE SIARKI "SIARKOPOL" S. A. (Poland)
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| Inventor |
- Warzała, Marek
- Nosal, Hanna
- Stańczyk, Dorota
- Ledniowska, Kerstin
- Stempiński, Edward
- Elias, Bernard
- Nowicki, Janusz
- Robaszkiewicz, Andrzej
- Matus, Grzegorz
- Kudła, Stanisław
- Nowakowska-Bogdan, Ewa
- Krzysiak-Warzała, Barbara
- Semeniuk, Izabela
- Koczwara, Zbigniew
- Kania, Jan
- Pieńkowski, Kamil
- Mijał, Witold
- Miska, Marcin
- Czerw, Rafał
- Mołas, Elżbieta
- Mazur, Marta
- Snopkiewicz, Zbigniew
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Abstract
A method for the preparation of poly(phenylene sulfide) involves a reaction between an alkaline metal hydrosulfide and 1,4-dichlorobenzene in a polar solvent. It is carried out such that the alkaline metal hydrosulfide and hydroxide are dissolved in water and mixed, and then N-methylpyrrolidone and additives that ensure an adequate reaction medium are added, and excess water is removed by distillation. A silicate suspension in a solution of 1,4-dichlorobenzene with N-methylpyrrolidone is added to the thus obtained system, wherein the mean silicate grain size is not higher than 10 µm. Then, polycondensation is carried out for 2 to 10 hours at a temperature ranging from 220 to 270 ºC, and a post-reaction mixture is obtained, from which a polymer is separated, which is in turn purified and dried. A material with high molecular weight and a high degree of crystallinity is obtained with a good yield.
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