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US 8,420,758 B2Granted
Regulated and continuous polymerization of polycarboxylic acid polymers
AssigneeItaconix Corporation
InventorsYvon Durant, John Shaw
Life of this patent
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Abstract
The present invention relates to methods and polymers based upon vinyl type monomers that contain pendant carboxylic acid groups and ester group functionality. The polymerization methods include regulation of heat flow such that parameters of monomer conversion, acid functionality, molecular weight, tacticity and/or copolymer composition may be adjusted to selected levels for a selected application.
Claims44
A method of polymerization comprising:
- (a) supplying a monomer having one or more of the following structures:
- wherein R1 and R2 are selected from a hydrogen atom or an alkyl group or an aromatic group, or a cyclic alkyl group or a polyether, and combinations thereof and R3 is selected from an alkyl group, aromatic functionality, heteroaromatic functionality, cyclic alkyl group, heterocyclic group, or combinations thereof, wherein at least 50 mole % of R1 and R2 are a hydrogen atom to provide carboxylic acid functionality;
- (b) combining at least one of monomers (I), (II) and/or (III) with a solvent and partially neutralizing the carboxylic acid functionality at a level of 25.0 mole % to 85.0 mole % for each mole of carboxylic acid functionality present to provide a monomer/solvent polymerizing media having an exposed surface area (SAPM) and a density (DPM);
- (c) polymerizing said monomers in a reactor to provide an exothermic heat of polymerization (ΔHp) and allowing said solvent to evaporate from said reactor to provide an endothermic heat of vaporization (ΔHv) wherein ΔHp and ΔHv maintain the temperature of said polymerization at 50.0° C. to 150° C.;
- (d) removing said polymerized monomers from said reactor and increasing the SAPM and decreasing DPM and maintaining the temperature of said polymerization at 50.0° C. to 150° C.
2 more elements
A method of polymerization comprising:
- (a) supplying a monomer having the following structure:
- wherein R1 and R2 are selected from a hydrogen atom or an alkyl group or an aromatic group, or a cyclic alkyl group or a polyether, and combinations thereof and R3 is selected from an alkyl group, aromatic functionality, heteroaromatic functionality, cyclic alkyl group, heterocyclic group, or combinations thereof, wherein at least 50 mole % of R1 and R2 are a hydrogen atom to provide carboxylic acid functionality;
- (b) combining said monomer with a solvent and partially neutralizing the carboxylic acid functionality at a level of 25.0 mole % to 85.0 mole % for each mole of carboxylic acid functionality present to provide a monomer/solvent polymerizing media having an exposed surface area (SAPM) and a density (DPM);
- (c) polymerizing said monomer in a reactor to provide an exothermic heat of polymerization (ΔHp) and allowing said solvent to evaporate from said reactor to provide an endothermic heat of vaporization (ΔHv) wherein ΔHp and ΔHv maintain the temperature of said polymerization at 50.0° C. to 150° C.;
- (d) removing said polymerized monomers from said reactor and increasing the SAPM and decreasing DPM and maintaining the temperature of said polymerization at 50.0° C. to 150° C.
2 more elements
A method of polymerization comprising:
- (a) supplying a monomer having one or more of the following structures:
- wherein R1 and R2 are selected from a hydrogen atom or an alkyl group or an aromatic group, or a cyclic alkyl group or a polyether, and combinations thereof and R3 is selected from an alkyl group, aromatic functionality, heteroaromatic functionality, cyclic alkyl group, heterocyclic group, or combinations thereof, wherein at least 50 mole % of R1 and R2 are a hydrogen atom to provide carboxylic acid functionality;
- (b) combining at least one of monomers (I), (II) and/or (III) with a solvent and partially neutralizing the carboxylic acid functionality at a level of 25.0 mole % to 85.0 mole % for each mole of carboxylic acid functionality present to provide a monomer/solvent polymerizing media having an exposed surface area (SAPM) and a density (DPM);
- (c) polymerizing said monomers in a reactor to provide an exothermic heat of polymerization (ΔHp) and allowing said solvent to evaporate from said reactor to provide an endothermic heat of vaporization (ΔHv) wherein ΔHp and ΔHv maintain the temperature of said polymerization at 50.0° C. to 150° C.;
- (d) removing said polymerized monomers from said reactor and increasing the SAPM and decreasing DPM and maintaining the temperature of said polymerization at 50.0° C. to 150° C.;
- wherein the percent conversion of monomer to polymer is 50% to 99.9% with:
- (1) a weight average molecular weight at or above 20,000 g/mole;
- and/or (2) 13C NMR triad syndiotacticity greater than 58.0%.
5 more elements
Dependencies are inferred from the claim text.