Method for producing (meth)acrylic acid esters
First Claim
Patent Images
1. A process for the preparation of higher (meth)acrylates by transesterification of a lower (meth)acrylate with a higher alcohol R2OH which either carries, as R2, C2–
- C12-alkyl radical having at least one NR32 group in which R3 is C1–
C6-alkyl and N may also be a member of a five- to seven-membered ring or is R32N(—
CH2CH2—
O)y-H, R32N(—
CH(CH3)—
CH—
O)y—
H or R32N(—
CH2CH(CH3)—
O)y—
H, where y is an integer from 1 to 4, in the presence of a stabilizer or stabilizer mixture and of a catalyst or catalyst mixture, wherein the liberated lower alkanol R1OH, where R1 contains at least 1 carbon atom less than R2, is separated off and is fed at least partly to the preparation of a lower (meth)acrylate without further purification.
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Abstract
Higher (meth)acrylates IV are prepared by transesterification of a lower (meth)acrylate I with a higher alcohol R2OH in the presence of a stabilizer or stabilizer mixture and of a catalyst or catalyst mixture, by a process in which the liberated lower alkanol R1OH is separated off and is fed at least partly to the preparation of the lower (meth)acrylate I.
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Citations
24 Claims
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1. A process for the preparation of higher (meth)acrylates by transesterification of a lower (meth)acrylate with a higher alcohol R2OH which either carries, as R2, C2–
- C12-alkyl radical having at least one NR32 group in which R3 is C1–
C6-alkyl and N may also be a member of a five- to seven-membered ring or is R32N(—
CH2CH2—
O)y-H, R32N(—
CH(CH3)—
CH—
O)y—
H or R32N(—
CH2CH(CH3)—
O)y—
H, where y is an integer from 1 to 4, in the presence of a stabilizer or stabilizer mixture and of a catalyst or catalyst mixture, wherein the liberated lower alkanol R1OH, where R1 contains at least 1 carbon atom less than R2, is separated off and is fed at least partly to the preparation of a lower (meth)acrylate without further purification. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- C12-alkyl radical having at least one NR32 group in which R3 is C1–
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2. A process for the preparation of higher (meth)acrylates by transesterification of a lower (meth)acrylate with a higher alcohol R2OH which is selected from 2-(dimethylamino)ethanol, 3-(dimethylamino)propanol, 4-(dimethylamino)butanol, 5-(dimethylamino)pentanol, 6-(dimethylamino)hexanol, 8-(dimethylamino)octanol, 10-(dimethylamino)decanol, 12-(dimethylamino)dodecanol, 2-(diethylamino)ethanol, 3-(diethylamino)propanol, 4-(diethylamino)butanol, 5-(diethylamino)pentanol, 6-(diethylamino)hexanol, 8-(diethylamino)octanol, 10-(diethylamino)decanol, 12-(diethylamino)dodecanol, 2-(di(isopropyl)amino)ethanol, 3-(di(isopropyl)amino)propanol, 4-(di(isopropyl)amino)-butanol, 5-(di(isopropyl)amino)pentanol, 6-(di(isopropyl)amino)hexanol, 8-(di(isopropyl)amino)octanol, 10-(di(isopropyl)amino)decanol, 12-(di(isopropyl)amino)-dodecanol, 2-(dibutylamino)ethanol, 3-(dibutylamino)propanol, 4-(dibutylamino)butanol, 5-(dibutylamino)pentanol, 6-(dibutylamino)hexanol, 8-(dibutylamino)octanol, 10-(dibutylamino)decanol, 12-(dibutylamino)dodecanol, 2-(dihexylamino)ethanol, 3-(dihexylamino)propanol, 4-(dihexylamino)butanol, 5-(dihexylamino)pentanol, 6-(dihexylamino)hexanol, 8-(dihexylamino)octanol, 10-(dihexylamino)decanol, 12-(dihexylamino)dodecanol, 2-(methylethylamino)ethanol, 2-(methylpropylamino)ethanol, 2-(methylisopropylamino)-ethanol, 2-(methylbutylamino)ethanol, 2-(methylhexylamino)ethanol, 2-(methyloctylamino)ethanol, 2-(ethylpropylamino)ethanol, 2-(ethylisopropylamino)ethanol, 2-(ethylbutylamino)ethanol, 2-(ethylhexylamino)ethanol, 2-(ethyloctylamino)ethanol, 3-(methylethylamino)propanol, 3-(methylpropylamino)propanol, 3-(methylisopropylamino)-propanol, 3-(methylbutylamino)propanol, 3-(methylhexylamino)-propanol, 3-(methyloctylamino)propanol, 3-(ethylpropylamino)-propanol, 3-ethylisopropylamino)propanol, 3-(ethylbutylamino)propanol, 3-(ethylhexylamino)propanol, 3-(ethyloctylamino)propanol, 4-(methylethylamino)butanol, 4-(methylpropylamino)butanol, 4-(methylisopropylamino)-butanol, 4-(methylbutylamino)butanol, 4-(methylhexylamino)butanol, 4-(methyloctylamino)butanol, 4-(ethylpropylamino)butanol, 4-(ethylisopropylamino)butanol, 4-(ethylbutylamino)butanol, 4-(ethylhexylamino)butanol, 4-(ethyloctylamino)butanol, 2-(N-piperidinyl)ethanol, 3-(N-piperidinyl)propanol, 4-(N-piperidinyl)butanol, 5-(N-piperidinyl)pentanol, 6-(N-piperidinyl)hexanol, 8-(N-piperidinyl)octanol, 10-(N-piperidinyl)decanol, 12-(N-piperidinyl)dodecanol, 2-(N-pyrrolidinyl)ethanol, 3-(N-pyrrolidinyl)propanol, 4-(N-pyrrolidinyl)butanol, 5-(N-pyrrolidinyl)pentanol, 6-(N-pyrrolidinyl)hexanol, 8-(N-pyrrolidinyl)octanol, 10-(N-pyrrolidinyl)decanol, 12-(N-pyrrolidinyl)dodecanol, 2-(N-morpholino)ethanol, 3-(N-morpholino)propanol, 4-(N-morpholino)butanol, 5-(N-morpholino)pentanol, 6-(N-morpholino)hexanol, 8-(N-morpholino)octanol, 10-(N-morpholino)decanol, 12-(N-morpholino)dodecanol, 2-(N′
- -methyl-N-piperazinyl)-ethanol, 3-(N′
-methyl-N-piperazinyl)propanol, 4-(N′
-methyl-N-piperazinyl)butanol, 5-(N′
-methyl-N-piperazinyl)pentanol, 6-(N′
-methyl-N-piperazinyl)hexanol, 8-(N′
-methyl-N-piperazinyl)octanol, 10-(N′
-methyl-N-piperazinyl)decanol 12-(N′
-methyl-N-piperazinyl)-dodecanol, 2-(N′
-ethyl-N-piperazinyl)ethanol, 3(N′
-ethyl-N-piperazinyl)propanol, 4-(N′
-ethyl-N-piperazinyl)butanol, 5-(N′
-ethyl-N-piperazinyl)pentanol, 6-(N′
-ethyl-N-piperazinyl)hexanol, 8-(N′
-ethyl-N-piperazinyl)octanol, 10-(N′
-ethyl-N-piperazinyl)decanol, 12-(N′
-ethyl-N-piperazinyl)dodecanol, 2-(N′
-isopropyl-N-piperazinyl)ethanol, 3-(N′
-isopropyl-N-piperazinyl)-propanol, 4-(N′
-isopropyl-N-piperazinyl)butanol, 5-(N′
-isopropyl-N-piperazinyl)pentanol, 6-(N′
-isopropyl-N-piperazinyl)hexanol, 8-(N′
-isopropyl-N-piperazinyl)octanol, 10-(N′
-isopropyl-N-piperazinyl)decanol, 12-(N′
-isopropyl-N-piperazinyl)dodecanol or ethoxylated and/or propoxylated alcohols and mixed ethoxylated/propoxylated amino alcohols, R32N(—
CH2CH2—
O)y—
H or R32N(—
CH(CH3)—
CH2—
O)y—
H or R32N(—
CH2—
CH(CH3)—
O—
)y—
H, where y is an integer from 1 to 4, in the presence of a stabilizer or stabilizer mixture and of a catalyst or catalyst mixture, wherein the liberated lower alkanol R1OH, which is selected from methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, 2-butanol and tert-butanol, is separated off and is fed at least partly to the preparation of a lower (meth)acrylate without further purification. - View Dependent Claims (3, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- -methyl-N-piperazinyl)-ethanol, 3-(N′
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24. A process for the preparation of higher (meth)acrylates by transesterification of a lower (meth)acrylate with a higher alcohol R2OH which either carries, as R2, a C2–
- C12-alkyl radical having at least one NR32 group in which R3 is C1–
C6-alkyl and N may also be a member of a five- to seven-membered ring or is R32N(—
CH2CH2—
O)y-H, R32N(-CH(CH3)—
CH—
O)y—
H or R32N(—
CH12CH(CH3)—
O)y13 H, where y is an integer from 1 to 4, in the presence of a stabilizer or stabilizer mixture and of a catalyst or catalyst mixture, wherein the liberated lower alkanol R1OH, where R1 contains at least 1 carbon atom less than R2, is separated off and is fed at least partly to the preparation of a lower (meth)acrylate without further purification over ion-exchange resin.
- C12-alkyl radical having at least one NR32 group in which R3 is C1–
Specification