Method for the synthesis of (meth)acrylic esters catalysed by a polyol titanate
AssigneeArkema France
InventorJean-Michel Paul
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Abstract
The subject of the invention is a method for the synthesis of (meth)acrylic esters by transesterification in the presence of a catalyst corresponding to the formula [(R′O)3TiO]xR″ in which R′ is a linear or branched alkyl radical having from 2 to 8 carbon atoms which may contain heteroatoms or R′ is a phenyl radical, R′ is a polyfunctional radical, originating from a polyol R′(OH)x comprising x alcohol functional groups and x is an integer ranging from 2 to 6. The method according to the invention is particularly well suited to the synthesis of dialkylaminoalkyl (meth)acrylates from methyl (meth)acrylate and a dialkylaminoalcohol.
Claims9
A method for the synthesis of (meth)acrylic esters of formula (I):
- in which R is a hydrogen atom or a methyl group, and R1 is a linear or branched alkyl radical, or a cyclic aliphatic, aryl, alkylaryl or arylalkyl radical, containing from 5 to 40 carbon atoms, or a linear or branched alkyl radical containing at least one heteroatom and having from 3 to 40 carbon atoms, comprising:
- reacting an alkyl (meth)acrylate of formula (II):
- in which R has the abovementioned meaning and R2 is a methyl group,
- with an alcohol of formula (III):
- R1—OH
- in which R1 has the abovementioned meaning,
- in the presence of a transesterification catalyst and of at least one polymerization inhibitor, characterized in that the catalyst is a polyol titanate of formula (IV) [(R′O)3TiO]xR″ in which R′ is selected from a linear or branched alkyl radical having from 2 to 8 carbon atoms which may contain heteroatoms or a phenyl radical, R″ is a linear or branched alkylene group having from 2 to 12 carbon atoms and which may comprise oxygen atoms and/or aliphatic or aromatic rings, originating from a polyol R″(OH)x comprising x alcohol functions and x is an integer ranging from 2 to 6.
Dependencies are inferred from the claim text.