CS225049B1 - The sterically hindered piperidine on the base of alpha-monosubstituted butadiene acid - Google Patents
The sterically hindered piperidine on the base of alpha-monosubstituted butadiene acid Download PDFInfo
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- CS225049B1 CS225049B1 CS420882A CS420882A CS225049B1 CS 225049 B1 CS225049 B1 CS 225049B1 CS 420882 A CS420882 A CS 420882A CS 420882 A CS420882 A CS 420882A CS 225049 B1 CS225049 B1 CS 225049B1
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- monosubstituted
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- sterically hindered
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- hindered piperidine
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Description
Vynález sa týká stéricky bráněných piperidínov na báze alfa-monosubstituovanej kyseliny butándiovej obecného vzorca IThe invention relates to sterically hindered piperidines based on alpha-monosubstituted butanedioic acid of the formula I
kde R značí metylová alebo etylová skupinu a ďalej sa vynález týká spfisobu ich přípravy.wherein R represents a methyl or ethyl group and the invention further relates to the preparation thereof.
Spfisob přípravy stéricky bráněných piperidínov na báze alfa-monosubstituovanej kyseliny butándiovej je založený na adícii 4-amino-2,2,6,6-tetrametylpiperidínu na dimetyl alebo dietylester kyseliny buténdiovej pri laboratórnej teplote, najvýhodnejěie v polárnom rozpúíťadle ako například v metanole.The method of preparing sterically hindered piperidines based on alpha-monosubstituted butanedioic acid is based on the addition of 4-amino-2,2,6,6-tetramethylpiperidine to dimethyl or diethylester of butenedioic acid at room temperature, most preferably in a polar solvent such as methanol.
Uvedené zlúčeniny patriace do skupiny stéricky bráněných amínov mfižu samotné pfisobiť ako světelné stabilizátory polymérov. Nevýhodou nízkomolekulových zlúčenín tejto skupiny je ich značná prchavosť, vypierateTnosť z Užitkového polyméru a toxicita. Přípravou polymérnyoh světelných stabilizátorov sa tieto nedostatky mfižu odstrániť. K tomuto účelu mfižu slúžiť látky, ktoré sú predmetom vynálezu.The compounds belonging to the group of sterically hindered amines can themselves be used as light stabilizers of polymers. The disadvantages of the low molecular weight compounds of this group are their high volatility, utility polymer washability and toxicity. By preparing polymeric light stabilizers, these drawbacks can be overcome. The substances which are the subject of the invention can be used for this purpose.
K roztoku 1,5526 g (0,01 mol) 4-amino-2,2,6,6-tetrametylpiperidínu v 10 ml metanolu sa pomaly prikvapkáva 1,7615 g (0,01 mol) dimetylesteru kyseliny maleinovej a zmes sa miega pri laboratórnej teplote 10 h. Po uplynulom Sase sa rozpúšťadlo odpaří a zbytok rozpustí v 20 ml chloroformu. Chloroformový roztok sa dókladne premyje vodou a vysuší nad bezvodým síranom sodným. Po odpaření rozpúšťadla sa zbytok íistí kryštalizéciou z petroléteru, aleboTo a solution of 1.5526 g (0.01 mol) of 4-amino-2,2,6,6-tetramethylpiperidine in 10 ml of methanol was slowly added dropwise 1.7615 g (0.01 mol) of dimethyl maleic ester and the mixture was stirred at room temperature. room temperature 10 h. After the period of time, the solvent was evaporated and the residue was dissolved in 20 ml of chloroform. The chloroform solution was washed thoroughly with water and dried over anhydrous sodium sulfate. After evaporation of the solvent, the residue is purified by crystallization from petroleum ether or
PříkladExample
IČ spektrum (chloroform):IR (chloroform):
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CS420882A CS225049B1 (en) | 1982-06-07 | 1982-06-07 | The sterically hindered piperidine on the base of alpha-monosubstituted butadiene acid |
Applications Claiming Priority (1)
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CS420882A CS225049B1 (en) | 1982-06-07 | 1982-06-07 | The sterically hindered piperidine on the base of alpha-monosubstituted butadiene acid |
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CS225049B1 true CS225049B1 (en) | 1984-02-13 |
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CS420882A CS225049B1 (en) | 1982-06-07 | 1982-06-07 | The sterically hindered piperidine on the base of alpha-monosubstituted butadiene acid |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ299104B6 (en) * | 2006-03-23 | 2008-04-23 | Ústav makromolekulární chemie AV CR | Copolymer stabilizer containing piperidine derivative, process for its preparation and use |
-
1982
- 1982-06-07 CS CS420882A patent/CS225049B1/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ299104B6 (en) * | 2006-03-23 | 2008-04-23 | Ústav makromolekulární chemie AV CR | Copolymer stabilizer containing piperidine derivative, process for its preparation and use |
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