Claims
- 1. A process for the preparation of stabilizer compounds comprising reacting a sterically hindered amine compound of the following formulae: ##STR7## wherein R is selected from an aliphatic hydrocarbon and an oxyhydrocarbon group having 2 to 10 carbon atoms; R.sub.2 is methyl; R.sub.3 is selected from methyl and ethyl; R.sub.4 is selected from a straight and branched chain alkyl group having from 1 to 10 carbon atoms; R5 is selected from a straight and branched chain alkylene group having from 2 to 5 carbon atoms; and n is selected from 0, 1 and 2, with a monohydroxy aliphatic alcohol having at least 6 carbon atoms or a polyhydroxy aliphatic alcohol having at least 4 carbon atoms, wherein the ratio of the methoxy or ethoxy groups to the alcoholic hydroxy groups in within the range of 1/1 to 3/1, under transesterification conditions and in the presence of a transesterification catalyst whereby methanol or ethanol is formed as a by product, continuously removing said by-product from the transesterification reaction and recovering said stabilizer compounds from said transesterification reaction.
- 2. The process of claim 1, wherein the aliphatic mono- or polyhydroxyalcohol is selected from hexanol, octanol, ethylhexanol, caprylic alcohol, cetyl alcohol, lauryl alcohol, stearyl alcohol, diethylene glycol monobutyl ether, butanediol, pentanediol, hexanediol, decanediol, 2,2,-dimethylpropanediol, diethylene glycol, pentaerythritaol and trimethylolpropane.
- 3. The process of claim 1, wherein the transesterification catalyst is sodium methoxide which is present in an amount of from 0.2 to 2% by weight based on the weight of the reactants.
- 4. The process of claim 1, further comprising conducting the transesterification reaction in the absence of solvents or diluents at a temperature of from 100.degree. to 150.degree. C., under reduced pressure or under a flow of inert gas, or under reduced pressure and under a flow or inert gas, until the stabilizer compound recovered has a molecular weight of at least 200.
- 5. The process of claim 4, wherein the stabilizer compound has a molecular weight in the range of from 300 to 1000.
- 6. The process of claim 1, wherein the transesterification reaction is carried out for 20 minutes to 4 hours.
- 7. The process of claim 1 wherein the reaction temperature is from 100.degree. C. to 150.degree. C.
- 8. The process of claim 1 wherein said transesterification catalyst is neutralized catalyst residue is removed after the reaction is completed.
- 9. The process of claim 8 wherein said neutralizing agent is acetic acid and said transesterification catalyst residue is removed by filtration.
Priority Claims (1)
Number |
Date |
Country |
Kind |
23539 A/84 |
Nov 1984 |
ITX |
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Parent Case Info
This is a continuation of application Ser. No. 791,410 filed Oct. 25, 1985, now abandoned.
US Referenced Citations (3)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1155602 |
May 1985 |
SUX |
Continuations (1)
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Number |
Date |
Country |
Parent |
791410 |
Oct 1985 |
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