Alkali-metal phenolic compounds and uses thereof
AssigneeUniversidad De Alcala
InventorsMarta Elena GONZÁLEZ MOSQUERA, Miguel PALENZUELA CEBRIÁN, Valentina SESSINI, Christian RENTERO LLORENTE
Life of this patent
Estimating the term…
Abstract
The present invention relates to the use of alkali-metal phenolic compounds of formula (I) or (II) as catalysts in ring-opening polymerisation of heterocycles, such as cyclical esters, ethers and carbonates, for the industrial production of biodegradable polymers. The present invention also relates to a polymerisation method using the compounds.
Claims16
A method for ring-opening polymerisation or copolymerisation of heterocycles which comprises contacting the starting heterocycle or heterocycles with a catalyst of formula (I) or (II):
- wherein:
- R1 and R2 are selected independently from hydrogen, C3-C8 alkyl, C3-C8 haloalkyl, C3-C8 alkoxide, C3-C8 halo-alkoxide, C3-C8 dialkylamino, C3-C8 halo-dialkylamino, C3-C8 hydroxyalkyl or cyanide,
- R3 is selected from:
- H, C3-C8 alkyl, C3-C8 haloalkyl, C3-C8 cyanoalkyl, C3-C8 alkoxide, C3-C8 dialkylamino or cyanide,
- n is an integer between 1 and 3, and
- M is an alkali metal selected from Li, Na and K.
-18. (canceled)
Compounds of formula (II):
- wherein:
- R1 and R2 are selected independently from hydrogen, C3-C8 alkyl, C3-C8 haloalkyl, C3-C8 alkoxide, C3-C8 halo-alkoxide, C3-C8 dialkylamino, C3-C8 halo-dialkylamino, C3-C8 hydroxyalkyl or cyanide,
- R3 is selected from:
- H, C3-C8 alkyl, C3-C8 haloalkyl, C3-C8 cyanoalkyl, C3-C8 alkoxide, C3-C8 dialkylamino or cyanide, n is an integer between 1 and 3, and
- M is an alkali metal selected from Li, Na and K.
A method for the depolymerisation of polymers with heteroatoms in their structure for obtaining oligomers and derivatives of the monomers forming said polymers, which comprises contacting the starting polymer with a catalyst of formula (I) or (II):
- wherein:
- R1 and R2 are selected independently from hydrogen, C3-C8 alkyl, C3-C8 haloalkyl, C3-C8 alkoxide, C3-C8 halo-alkoxide, C3-C8 dialkylamino, C3-C8 halo-dialkylamino, C3-C8 hydroxyalkyl or cyanide,
- R3 is selected from:
- H, C3-C8 alkyl, C3-C8 haloalkyl, C3-C8 cyanoalkyl, C3-C8 alkoxide, C3-C8 dialkylamino or cyanide;
- n is an integer between 1 and 3;
- M is an alkali metal selected from Li, Na and K, and
- wherein said method is carried out in the presence of an R—OH alcohol, wherein R is a C3-C8 alkyl or benzyl radical.
Dependencies are inferred from the claim text.