Sprayable composition comprising high molecular weight charged polymer
Disclosed herein are sprayable compositions comprising: a complex of (A) at least one charged (or pseudo-charged) polymer having a molecular weight of about 125,000 amu or more; and (B) a least one oppositely charged, rheology modifying, crosslinked polymer having at least one carboxylic functional group. The composition may provide a spray with a median particle size of less than about 175 μm. Also disclosed are methods for preparing the compositions as well as creating the spray. The invention enables the spray of the high molecular weight charged (or pseudo-charged) polymer in any number of uses including personal care and performance chemicals application.
1. A method for preparing a uniform, sprayable composition comprising: a complex of (A) at least one anionic, pseudo-anionic, cationic or pseudo-cationic polymer having a molecular weight of 250,000 amu or more; and (B) at least one cationic, pseudo-cationic, anionic or pseudo-anionic rheology modifying crosslinked polymer having at least one carboxylic functional group, wherein, said complex is selected from the group consisting of:
(i) poly(N-vinyl-2-pyrrolidone-co-dimethylaminopropylmethacrylamide) copolymer and poly(N-vinyl-2-pyrrolidone-co-acrylic acid) crosslinked copolymer;
(ii) PQ-55 and poly(N-vinyl-2-pyrrolidone-co-acrylic acid) crosslinked copolymer;
(iii) poly(N-vinyl-2-pyrrolidone-co-dimethylaminopropylmethacrylamide) copolymer and poly(maleic anhydride-co-methylvinylether) 1, 10-butadiene crosslinked copolymer;
(iv) poly(N-vinyl-2-pyrrolidone-co-dimethylaminopropylmethacrylamide) copolymer and crosslinked polyacrylates; and
(v) poly(N-vinyl-2-pyrrolidone-co-dimethylaminoethyl methacrylate) copolymer and poly(N-vinyl-2-pyrrolidone-co-acrylic acid) crosslinked copolymer,
wherein, the sprayable composition provides a spray with a median droplet size, dv(50), of less than about 175 μm when actuated,
wherein the method comprises the steps:
(i) determining the amount of neutralizing agent required to adjust the pH of the rheology modifying crosslinked polymer, at the level to be used in the finished formulation in solution to within the range 5.5 to 8.5;
(ii) determining the amount of solvent to be used in the final, sprayable composition;
(iii) mixing and dissolving said rheology modifier of about 45% to about 75% of said solvent in a first vessel;
(iv) adding about half of said neutralizing agent to the first vessel and mixing;
(v) mixing and dissolving the high molecular weight charged polymer of about 25% to about 55% of said solvent in a second vessel, the amount of which is specified in step (ii);
(vi) adding about half of said neutralizing agent to the second vessel and mixing;
(vii) adding the solution from step (iv) to the solution from step (vi) while avoiding aeration, and mixing until uniform; and
(viii) optionally, adding any additional formulation ingredients and mixing until uniform.
2. The method of claim 1 wherein said solvent is selected from the group consisting of: water, alcohols, branched hydrocarbons, unbranched hydrocarbons, and blends thereof.
3. A method for creating a spray of sprayable composition comprising: a complex of (A) at least one anionic, pseudo-anionic, cationic or pseudo-cationic polymer having a molecular weight of 250,000 amu or more; and (B) at least one cationic, pseudo-cationic, anionic or pseudo-anionic rheology modifying crosslinked polymer having at least one carboxylic functional group, wherein, said complex is selected from the group consisting of:
(i) poly(N-vinyl-2-pyrrolidone-co-dimethylaminopropylmethacrylamide) copolymer and poly(N-vinyl-2-pyrrolidone-co-acrylic acid) crosslinked copolymer;
(ii) PQ-55 and poly(N-vinyl-2-pyrrolidone-co-acrylic acid) crosslinked copolymer;
(iii) poly(N-vinyl-2-pyrrolidone-co-dimethylaminopropyl-methacrylamide) copolymer and poly(maleic anhydride-co-methylvinylether) 1,10-butadiene crosslinked copolymer;
(iv) poly(N-vinyl-2-pyrrolidone-co-dimethylaminopropylmethacrylamide) copolymer and crosslinked polyacrylates; and
(v) poly(N-vinyl-2-pyrrolidone-co-dimethylaminoethyl methacrylate) copolymer and poly(N-vinyl-2-pyrrolidone-co-acrylic acid) crosslinked copolymer,
wherein the method comprises the steps:
(i) determining the amount of neutralizing agent required to adjust the pH of a rheology modifying crosslinked polymer, at the level to be used in the finished formulation in solution to within the range 5.5 to 8.5;
(ii) determining the amount of solvent to be used in the final, sprayable composition;
(iii) mixing and dissolving said rheology modifier of about 45% to about 75% of said solvent in a first vessel;
(iv) adding about half of said neutralizing agent to the first vessel and mixing;
(v) mixing and dissolving said high molecular weight charged polymer of about 25% to about 55% of said solvent in a second vessel, the amount of which is specified in step (ii);
(vi) adding about half of said neutralizing agent to the second vessel and mixing;
(vii) adding the solution from step (iv) to the solution from step (vi) while avoiding aeration, and mixing until uniform;
(viii) optionally, adding any additional formulation ingredients and mixing until uniform; and
(ix) actuating said composition
wherein, the method provides a spray with a median droplet size, dv(50), of less than about 175 μm.
4. The method of claim 3 wherein said actuating is performed by a pump sprayer, a bag on valve system, a bag in can system, a sleeve in can system, or traditional aerosol system.