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US 7,598,303 B2Granted
Process for making an aqueous dispersion
AssigneeRohm and Haas Company
InventorWillie Lau
Life of this patent
Estimating the term…
Abstract
A process for making an aqueous dispersion is provided. More specifically, a process for making an aqueous dispersion having at least two polymeric components is provided.
Claims9
A process for forming an aqueous dispersion having at least two polymeric components, comprising:
- (i) forming at least one high molecular weight polymeric component;
- and,
- (ii) forming at least one low molecular weight polymeric component according to formula I:
- A-B (I)
- wherein A is derived from a chain transfer component that exhibits a water solubility at 25 to 50° C. of no greater than 150 millimoles/liter and B is a polymer chain;
- wherein the low molecular weight polymeric component is formed in the presence of a macromolecular organic compound having a hydrophobic cavity selected from cyclodextrin, cyclodextrin derivatives, cyclic oligosaccharides having a hydrophobic cavity, calyxarenes, cavitands and combinations thereof;
- wherein the low molecular weight component is formed within the high molecular weight polymeric component;
- wherein the low molecular weight polymeric component exhibits a number average molecular weight of no more than 10,000 and the high molecular weight polymeric component exhibits a number average molecular weight of at least 50,000.
5 more elements
A process for forming an aqueous dispersion having at least two polymeric components, comprising:
- (i) polymerizing at least one first monomer to form a high molecular weight polymeric component;
- and,
- (ii) adding, to the product of (i),
- (a) at least one second monomer;
- (b) at least one macromolecular organic compound having a hydrophobic cavity selected from cyclodextrin, cyclodextrin derivatives, cyclic oligosaccharides having a hydrophobic cavity, calyxarenes, cavitands and combinations thereof;
- and,
- (c) at least one chain transfer component that exhibits low water solubility;
- wherein (a), (b) and (c) interact to form a low molecular weight polymeric component according to formula I:
- A-B (I);
- wherein A is derived from the at least one chain transfer component that exhibits a water solubility at 25 to 50° C. of no greater than 150 millimoles/liter and wherein B is a polymer chain;
- and,
- wherein the at least one first monomer and the at least one second monomer may be the same or different;
- wherein the low molecular weight component is formed within the high molecular weight polymeric component;
- wherein the low molecular weight polymeric component exhibits a number average molecular weight of no more than 10,000 and the high molecular weight polymeric component exhibits a number average molecular weight of at least 50,000.
11 more elements
A process for forming an aqueous dispersion having at least two polymeric components, comprising:
- (i) combining
- (a) at least one first monomer;
- (b) at least one macromolecular organic compound having a hydrophobic cavity selected from cyclodextrin, cyclodextrin derivatives, cyclic oligosaccharides having a hydrophobic cavity, calyxarenes, cavitands and combinations thereof;
- and,
- (c) at least one chain transfer component that exhibits low water solubility;
- wherein (a), (b) and (c) interact to form a low molecular weight polymeric component according to formula I:
- A-B (I);
- wherein A is derived from the at least one chain transfer component that exhibits a water solubility at 25 to 50° C. of no greater than 150 millimoles/liter and wherein B is a polymer chain;
- (ii) adding at least one second monomer to the product of (i);
- and
- (iii) polymerizing the at least one second monomer to form a high molecular weight polymeric component;
- wherein the at least one first monomer and the at least one second monomer may be the same or different;
- wherein the low molecular weight component is formed within the high molecular weight polymeric component;
- wherein the low molecular weight polymeric component exhibits a number average molecular weight of no more than 10,000 and the high molecular weight polymeric component exhibits a number average molecular weight of at least 50,000.
11 more elements
Dependencies are inferred from the claim text.