PL108755B2 - Method of producing polyamide solutions - Google Patents

Method of producing polyamide solutions Download PDF

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Publication number
PL108755B2
PL108755B2 PL20587478A PL20587478A PL108755B2 PL 108755 B2 PL108755 B2 PL 108755B2 PL 20587478 A PL20587478 A PL 20587478A PL 20587478 A PL20587478 A PL 20587478A PL 108755 B2 PL108755 B2 PL 108755B2
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PL
Poland
Prior art keywords
water
polyamide
solutions
producing polyamide
polyamides
Prior art date
Application number
PL20587478A
Other languages
Polish (pl)
Other versions
PL205874A1 (en
Inventor
Zygmunt Wirpsza
Maria Zietek
Original Assignee
Politechnika Swietokrzyska
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Politechnika Swietokrzyska filed Critical Politechnika Swietokrzyska
Priority to PL20587478A priority Critical patent/PL108755B2/en
Publication of PL205874A1 publication Critical patent/PL205874A1/en
Publication of PL108755B2 publication Critical patent/PL108755B2/en

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Description

Przedmiotem wynalazku jest sposób wytwarzania roztworów poliamidów, zwlaszcza poliamidu 6 w roz¬ puszczalnikach}w sklad których wchodzi woda i które daja sie rozcienczyc woda.Dotychczas poliamidy, a zwlaszcza poliamid 6 i 6,6 rozpuszczano w fenolu oraz kwasie mrówkowym lub octowym. Rozpuszczalniki te sa klopotliwe w uzyciu i manipulacji, gdyz sa toksyczne. Roztwory pol - iamidu w nich nalezalo ochronic przed zetknieciem z woda, gdyz powodowala ona wytracenie poliamidu.Celem wynalazku bylo znalezienie rozpuszczalnika poliamidów, który bylby nietoksyczny i nie wyma¬ gal ochrony przed wilgocia lub zetknieciem sie z wod?. Nieoczekiwanie stwierdzono, ze mieszanina kaprol - aktamu, wody i rodanku amonu doskonale rozpuszcza poliamid, tworzac roztwory poliamidu o stezeniu do 15%.Istota wynalazku polega na tym, ze jako rozpuszczalnik stosuje sie mieszanine kaprolaktamu, rodanku amonu i wody w stosunku wagowym odpowiednio 0,5 - 2,0: 0,5 - 2,0, korzystnie 1:1:1, przy czym roz - puszczanie poliamidów przeprowadza sie w temperaturze 20 - 150°C, korzystnie 100 - 120°C, Przyklad I. 15 g granulek poliamidu 6 wtrysku ogrzewa sie w zlewce, mieszajac z mieszanina 28 g kaprolaktamu, 28 g wody i 28 g rodanku amonu w temperaturze 100 - 120°C az do rozpuszczenia. Otrzymuje sie klaro¬ wny, lekko opalizujacy roztwór, nie wydzielajacy toksycznych oparów, stabilny podczas przechowywania za¬ równo w naczyniu otwartym jak i zamknietym.Zastrzezeniepatentowe Sposób wytwarzania roztworów poliamidów, zwlaszcza poliamidu 6, znamienny tym, ze jako rozpuszczalnik stosuje sie mieszanine kaprolaktamu, rodanku amonu i wody w stosunku wagowym od¬ powiednio 0,5 - 2,0: 0,5 -2,0: 0,5 - 2,0, korzystnie 1:1:1, przy czym rozpuszczanie przeprowadza sie w temperaturze 2 - 150°C, korzystnie 100 - 120°C. PLThe subject of the invention is a process for the preparation of solutions of polyamides, especially polyamide 6, in solvents containing water and which can be diluted with water. Previously, polyamides, especially polyamide 6 and 6.6, were dissolved in phenol and formic or acetic acid. These solvents are difficult to use and handle because they are toxic. The polyamide solutions therein were to be protected against contact with water, as it caused the loss of polyamide. The aim of the invention was to find a non-toxic solvent for polyamides that would not require protection against moisture or contact with water. Unexpectedly, it was found that the mixture of caprolactam, water and ammonium rhodium perfectly dissolves the polyamide, creating polyamide solutions with a concentration of up to 15%. The essence of the invention consists in the fact that a mixture of caprolactam, ammonium rhodium and water in a weight ratio of 0, respectively, is used as a solvent. 5 - 2.0: 0.5 - 2.0, preferably 1: 1: 1, the dissolution of the polyamides being carried out at a temperature of 20 - 150 ° C, preferably 100 - 120 ° C. Example I. 15 g of granules Injection polyamide 6 is heated in a beaker, mixing with a mixture of 28 g of caprolactam, 28 g of water and 28 g of ammonium hydroxide at a temperature of 100 - 120 ° C until dissolved. A clear, slightly opalescent solution is obtained, which does not emit toxic vapors, and is stable during storage both in an open and closed vessel. Patent claim A method of producing solutions of polyamides, especially polyamide 6, characterized in that a mixture of caprolactam and a medium is used as a solvent. ammonium and water in a weight ratio of 0.5-2.0: 0.5-2.0: 0.5-2.0, preferably 1: 1: 1, respectively, the dissolution being carried out at a temperature of 2-150 ° C, preferably 100-120 ° C. PL

Claims (1)

1. Zastrzezeniepatentowe Sposób wytwarzania roztworów poliamidów, zwlaszcza poliamidu 6, znamienny tym, ze jako rozpuszczalnik stosuje sie mieszanine kaprolaktamu, rodanku amonu i wody w stosunku wagowym od¬ powiednio 0,5 - 2,0: 0,5 -2,0: 0,5 - 2,0, korzystnie 1:1:1, przy czym rozpuszczanie przeprowadza sie w temperaturze 2 - 150°C, korzystnie 100 - 120°C. PL1. Patent claim A method of producing solutions of polyamides, especially polyamide 6, characterized in that the solvent is a mixture of caprolactam, ammonium rhodium and water in a weight ratio of 0.5-2.0: 0.5-2.0: 0, respectively. , 5 - 2.0, preferably 1: 1: 1, with the dissolution being carried out at a temperature of 2 - 150 ° C, preferably 100 - 120 ° C. PL
PL20587478A 1978-04-05 1978-04-05 Method of producing polyamide solutions PL108755B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL20587478A PL108755B2 (en) 1978-04-05 1978-04-05 Method of producing polyamide solutions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL20587478A PL108755B2 (en) 1978-04-05 1978-04-05 Method of producing polyamide solutions

Publications (2)

Publication Number Publication Date
PL205874A1 PL205874A1 (en) 1979-03-12
PL108755B2 true PL108755B2 (en) 1980-04-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
PL20587478A PL108755B2 (en) 1978-04-05 1978-04-05 Method of producing polyamide solutions

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PL (1) PL108755B2 (en)

Also Published As

Publication number Publication date
PL205874A1 (en) 1979-03-12

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