Light Stabilizer 770 synthesis
- Product Name:Light Stabilizer 770
- CAS Number:52829-07-9
- Molecular formula:C28H52N2O4
- Molecular Weight:480.72
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52829-07-9
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2 Example 2
Example 2 To a reaction vessel equipped with a mechanical stirrer, a thermometer, a condenser maintained at 70°C, a trap and nitrogen sparge tube are added dimethylsebacate (25 g, 109 mmoles), 2,2,6,6-tetramethyl-4-hydroxypiperidine (37.5 g, 239 mmoles) and N-methylpyrrolidinone (7 ml) and heated to 100°C. Then lithium amide (0.124 g, 5.4 mmoles) is added with agitation and the reaction mixture is heated to 150-155°C for 3 hours at atmospheric pressure. During this period, nitrogen is continuously introduced subsurface at a rate of 0.5 L/min. to remove the generated methanol. The completed reaction mass is then cooled down to 100°C and neutralized with glacial acetic acid. Analysis by gas chromatography indicated that 99% of bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate is obtained, based on the dimethylsebacate.
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111-20-6
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52829-07-9
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2516-92-9
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52829-07-9
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