PL394094A1 - Segment polyurethanes, especially for medical applications and the method of their preparation - Google Patents
Segment polyurethanes, especially for medical applications and the method of their preparationInfo
- Publication number
- PL394094A1 PL394094A1 PL394094A PL39409411A PL394094A1 PL 394094 A1 PL394094 A1 PL 394094A1 PL 394094 A PL394094 A PL 394094A PL 39409411 A PL39409411 A PL 39409411A PL 394094 A1 PL394094 A1 PL 394094A1
- Authority
- PL
- Poland
- Prior art keywords
- hours
- stage
- medical applications
- polyurethanes
- reaction mixture
- Prior art date
Links
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- Materials For Medical Uses (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
Sposób według wynalazku charakteryzuje się tym, że w pierwszym etapie mieszaninę reakcyjną o zawartości od 65% wag. do 75% wag. polikaprolaktonodiolu jako oligodiolu tworzącego segmenty giętkie i od 25% wag. do 35% wag. diizocyjanianu izoforonu poddaje się działaniu temperatury 90-120°C w czasie 0,5-3 godzin przy obniżonym ciśnieniu do utworzenia prepolimeru korzystnie o zawartości wolnych grup izocyjanianowych od 3,5 do 15%. Następnie w drugim etapie do otrzymanego prepolimeru dodaje się korzystnie przy intensywnym mieszaniu, korzystnie w homogenizatorze, w czasie 0,5-2 minut 1,4-butanodiol w ilości od 6%-12% wag. w stosunku do wyjściowych substratów w etapie pierwszym, po czym tak otrzymaną mieszaninę reakcyjną wylewa się na metalową formę i wygrzewa przez okres 80-120 godzin w temperaturze 70-90°C, a otrzymane poliuretany korzystnie pozostawia się na kolejne 24 godziny celem relaksacji, po czym odformowuje się. Segmentowe poliuretany, zwłaszcza do zastosowań medycznych charakteryzujące się tym, że zawierają od 25 do 45% segmentów sztywnych.The method according to the invention is characterized in that, in the first stage, a reaction mixture containing from 65 wt. % to 75 wt. % polycaprolactonediol as an oligodiol forming flexible segments and from 25 wt. % to 35 wt. % isophorone diisocyanate is subjected to a temperature of 90-120°C for 0.5-3 hours at reduced pressure to form a prepolymer preferably having a content of free isocyanate groups from 3.5 to 15%. Then, in the second stage, 1,4-butanediol in an amount of from 6%-12% by weight is added to the obtained prepolymer preferably with intensive mixing, preferably in a homogenizer, for 0.5-2 minutes. in relation to the starting substrates in the first stage, after which the reaction mixture thus obtained is poured onto a metal mould and heated for a period of 80-120 hours at a temperature of 70-90°C, and the obtained polyurethanes are preferably left for another 24 hours for relaxation, after which they are demolded. Segmented polyurethanes, especially for medical applications, characterized in that they contain from 25 to 45% of rigid segments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL394094A PL218974B1 (en) | 2011-03-03 | 2011-03-03 | Segmented polyurethanes, particularly for medical applications, and process for the preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL394094A PL218974B1 (en) | 2011-03-03 | 2011-03-03 | Segmented polyurethanes, particularly for medical applications, and process for the preparation thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL394094A1 true PL394094A1 (en) | 2012-09-10 |
| PL218974B1 PL218974B1 (en) | 2015-02-27 |
Family
ID=46800496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL394094A PL218974B1 (en) | 2011-03-03 | 2011-03-03 | Segmented polyurethanes, particularly for medical applications, and process for the preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL218974B1 (en) |
-
2011
- 2011-03-03 PL PL394094A patent/PL218974B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL218974B1 (en) | 2015-02-27 |
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