Cationic synthetic polymers with improved solubility and performance in surfactant-based systems and use in personal care and household applications
View Patent ↗The present invention is related to surfactant-based formulations comprising the polyelectrolytes and blends of such polyelectrolytes with non-cellulosic cationic polysaccharide polymers. The surfactant-based formulations exhibit improved clarity of the resulting formulations, their improved conditioning of keratin substrates, textile substrates, and hard-surface substrates, their improved deposition of dispersed phase materials onto keratin substrates, textile substrates, and hard-surface substrates, their improved lather performance, and their improved rheology in applications such as personal care and household care products and textile applications.
1. A cationic polyelectrolyte formulation including:
1) a solid cationic synthetic water soluble polyelectrolyte comprising a polymer formed from (meth)acrylamide and one or more of i) a cationic (meth)acrylamide monomer, and ii) a cationic (meth)acrylic acid monomer, and iii) hydrolysis stable cationic monomers wherein said polyelectrolyte has a molecular weight less than 2 million and a charge density of 0.001 meg/g to 2.5 meq/g and a level of unreacted acrylamide monomer less than 50 ppm;
2) a surfactant;
3) a solvent, and;
4) wherein said cationic synthetic water soluble polyelectrolyte is formed by adiabatic gel polymerization and is subsequently milled to a particle size of 50 to 60 μm to provide said level of unreacted acrylamide of less than 50 ppm.
2. The composition claimed in claim 1 further including one active personal care ingredient or benefit agent.
3. The composition claimed in claim 2 further comprising a noncellulosic cationic polysaccharide.
4. The composition claimed in claim 3 wherein the polysaccharide is selected from the group consisting of guar, locust bean, tam, honey locust, cassia gum, flame tree, xanthum gum, gellan gum, wellan gum, rhamsan gum; konjac, mannan, gum acacia, soy polysaccharide, xylofructose gums, alginate and tamarind gum.
5. The composition claimed in claim 3 wherein said active personal care ingredient or benefit agent includes a conditioning agent.
6. The composition claimed in claim 5 wherein said agent is a silicone oil, jojoba oil, meadowfoam seed oil, seed oils, glycerin, emollient, or moisturizing agent.
7. The composition claimed in claim 3 wherein said active ingredient includes an antidandruff agent.
8. The composition claimed in claim 7 wherein said antidandruff agent is zinc pyrithione, selenium, or an antimicrobial compound.
9. The composition claimed in claim 1 comprising 0.01 to 30% by weight of said cationic synthetic water soluble polyelectrolyte.
10. The composition claimed in claim 1 comprising 0.01 to 50% surfactant.
11. The composition claimed in claim 10 wherein said surfactant is selected from a group consisting of anionic, cationic, nonionic, zwitterionic, amphoteric, gemini, and combinations thereof.
12. The composition claimed in claim 1 comprising 0.01 to 99% solvent.
13. The composition claimed in claim 1 wherein said polyelectrolyte has a level of unreacted monomer of 10.5 ppm or less.
14. A cationic polyelectrolyte formulation including:
1) a solid cationic synthetic water soluble polyelectrolyte comprising a polymer formed from (meth)acrylamide and one or more of i) a cationic (meth)acrylamide monomer, and ii) a cationic (meth)acrylic acid monomer, and iii) hydrolysis stable cationic monomers wherein said polyelectrolyte has a weight average molecular weight less than 2 million and a charge density of 0.001 meg/g to 2.5 meq/g and wherein said polyelectrolyte is formed by adiabatic gel polymerization and is subsequently milled to a particle size of 50 to 60 μm to provide a level of unreacted acrylamide monomer less than 50 ppm;
2) a surfactant;
3) a solvent, and
4) a noncellulosic cationic polysaccharide.
15. The composition claimed in claim 14 having a ratio of synthetic water soluble polyelectrolyte to polysaccharide of 5:95 to 95:5 by weight.
16. The composition claimed in claim 15 wherein said active ingredient includes a benefit agent.
17. The composition claimed in claim 14 wherein said benefit agent is silicone oil, jojoba oil, or meadowfoam seed oil.
18. A method of depositing an oil onto a surface comprising applying a composition comprising:
1) a solid cationic synthetic water soluble polyelectrolyte comprising a polymer formed from (meth)acrylamide and one or more of i) a cationic (meth)acrylamide monomer, and ii) a cationic (meth)acrylic acid monomer, and iii) hydrolysis stable cationic monomers wherein said polyelectrolyte has a weight average molecular weight less than 2 million and a charge density of 0.001 meg/g to 2.5 meq/g and wherein said cationic synthetic water soluble polyelectrolyte is formed by adiabatic gel polymerization and is subsequently milled to a particle size of 50 to 60 μm to provide a level of unreacted acrylamide of less than 50 ppm;
2) a surfactant;
3) a solvent,
4) an active personal care ingredient or benefit agent and
5) a cationic polysaccharide
onto a surface;
diluting said composition with water to form a diluted solution on said surface;
and
rinsing said diluted solution from said surface.