Star macromolecules for personal and home care
First Claim
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1. A star macromolecule represented by Formula X:
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[(P1)q1-(P2)q2]t-Core-[(P3)q3]r
Formula Xwherein;
Core represents a crosslinked polymeric segment;
P1 represents a homopolymeric segment comprised of repeat units of monomeric residues of polymerized hydrophobic monomers;
P2 represents a homopolymeric segment comprised of repeat units of monomeric residues of polymerized hydrophilic monomers;
P3 represents a homopolymeric segment comprised of repeat units of monomeric residues of polymerized hydrophilic monomers;
q1 represents the number of repeat units in P1 and has a value between 1 and 50;
q2 represents the number of repeat units in P2 and has a value between 30 and 500;
q3 represents the number of repeat units in P3 and has a value between 30 and 500;
r represents the number of homopolymeric arms covalently attached to the Core;
t represents the number of copolymeric arms covalently attached to the Core; and
wherein the molar ratio of r to t is in the range of between 20;
1 and 2;
1.
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Abstract
A polymer composition comprising star macromolecules is provided. Each star macromolecule has a core and five or more arms, wherein the number of arms within a star macromolecule varies across the composition of star molecules. The arms on a star are covalently attached to the core of the star; each arm comprises one or more (co)polymer segments; and at least one arm and/or at least one segment exhibits a different solubility from at least one other arm or one other segment, respectively, in a reference liquid of interest.
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Citations
19 Claims
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1. A star macromolecule represented by Formula X:
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[(P1)q1-(P2)q2]t-Core-[(P3)q3]r
Formula Xwherein; Core represents a crosslinked polymeric segment; P1 represents a homopolymeric segment comprised of repeat units of monomeric residues of polymerized hydrophobic monomers; P2 represents a homopolymeric segment comprised of repeat units of monomeric residues of polymerized hydrophilic monomers; P3 represents a homopolymeric segment comprised of repeat units of monomeric residues of polymerized hydrophilic monomers; q1 represents the number of repeat units in P1 and has a value between 1 and 50; q2 represents the number of repeat units in P2 and has a value between 30 and 500; q3 represents the number of repeat units in P3 and has a value between 30 and 500; r represents the number of homopolymeric arms covalently attached to the Core; t represents the number of copolymeric arms covalently attached to the Core; and wherein the molar ratio of r to t is in the range of between 20;
1 and 2;
1.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
wherein the gel has; i) a dynamic viscosity of at least 20,000 cP; ii) a saltinduced break value of at least 60%; iii) a shear-thinning value of at least 10; and
/oriv) an emulsion value of greater than 12 hours.
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12. The star macromolecule of claim 11, wherein the gel-forming star macromolecule has a viscosity of greater than 40,000 cP at a pH between 6 to 11.
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13. The star macromolecule of claim 11, wherein the gel-forming star macromolecule has a viscosity of less than 5,000 cP at a shear rate of 4 sec−
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14. The star macromolecule of claim 11, wherein the gel-forming star macromolecule has a PDI of less than 2.5.
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15. The star macromolecule of claim 11, wherein the gel-forming star macromolecule is a water-soluble mikto star macromolecule.
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16. The star macromolecule of claim 11, wherein the gel-forming star macromolecule has between 15 to 45 arms.
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17. The star macromolecule of claim 11, wherein the arms of the gel-forming star macromolecule have an HLB of between 18 and 20.
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18. An emulsion comprising:
the star macromolecule of claim 1 having; i) a molecular weight of at least 150,000 g/mol; and ii) a dynamic viscosity of at least 20,000 cP at a concentration of 0.4 wt. %.
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19. The emulsion of claim 18, wherein the emulsion is an emulsifier-free emulsion.
Specification