Use of structured water-soluble polymers obtained by controlled radical polymerization as a dispersant and agent for assisting in the grinding of mineral materials
AssigneeCoatex
InventorsJean-Marc Suau, Christian Jacquemet, Yves Kensicher
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Abstract
The invention relates to the use, as a dispersant and/or a grinding aid agent for pigments and/or mineral fillers in aqueous suspension, of a water soluble polymer with a controlled structure obtained by a controlled free radical polymerization process putting into practice a particular alkoxyamine as a polymerization initiator.
Claims40
A process comprising adding to pigments and/or mineral fillers in aqueous suspension, to function as a dispersant and/or a grinding aid agent a water soluble polymer, wherein said water soluble polymer has a controlled structure and is obtained by a controlled free radical polymerization method employing, as polymerization initiator, a particular alkoxyamine with the general formula (A):
- where:
- R1 and R2 represent a linear or branched alkyl radical, with 1 to 5 carbon atoms,
- R3 is a hydrogen atom, a linear or branched alkyl radical with 1 to 8 carbon atoms, a phenyl radical, a cation such as Li+, Na+, K+, H4N+, Bu3HN+ with Bu=butyl,
- R4 is a linear or branched alkyl radical with 1 to 8 carbon atoms, and preferably a tertbutyl radical,
- R5 is a linear or branched alkyl radical with 1 to 8 carbon atoms, and preferably a tertbutyl radical, and
- R6 and R7 represent a linear or branched alkyl radical with 1 to 8 carbon atoms, and preferably an ethyl radical.
A dispersant and/or grinding aid agent for pigments and/or mineral fillers in aqueous suspension, comprising a water soluble polymer with a controlled structure obtained by a controlled free radical polymerization method employing, as polymerization initiator, a particular alkoxyamine with the general formula (A):
- where:
- R1 and R2 represent a linear or branched alkyl radical, with 1 to 5 carbon atoms,
- R3 is a hydrogen atom, a linear or branched alkyl radical with 1 to 8 carbon atoms, a phenyl radical, a cation such as Li+, Na+, K+, H4N+, Bu3HN+ with Bu=butyl,
- R4 is a linear or branched alkyl radical with 1 to 8 carbon atoms, and preferably a tertbutyl radical, and
- R5 is a linear or branched alkyl radical with 1 to 8 carbon atoms, and preferably a tertbutyl radical, and
- R6 and R7 represent a linear or branched alkyl radical with 1 to 8 carbon atoms, and preferably an ethyl radical.
A grinding aid agent for pigments and/or mineral fillers in aqueous suspension, comprising a water soluble polymer with a controlled structure obtained by a controlled free radical polymerization method employing, as polymerization initiator, a particular alkoxyamine with the general formula (A):
- where:
- R1 and R2 represent a linear or branched alkyl radical, with 1 to 5 carbon atoms,
- R3 is a hydrogen atom, a linear or branched alkyl radical with 1 to 8 carbon atoms, a phenyl radical, a cation such as Li+, Na+, K+, H4N+, Bu3HN+ with Bu=butyl,
- R4 is a linear or branched alkyl radical with 1 to 8 carbon atoms, and preferably a tertbutyl radical,
- R5 is a linear or branched alkyl radical with 1 to 8 carbon atoms, and preferably a tertbutyl radical, and
- R6 and R7 represent a linear or branched alkyl radical with 1 to 8 carbon atoms, and preferably an ethyl radical.
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Dependencies are inferred from the claim text.