Compositions containing hydrophobic addenda uniformly loaded in latex polymer particles
First Claim
1. A composition containing a continuous aqueous phase and loaded polymer particles having an average diameter of from 0.02 to 0.2 micron and consisting essentially of(1) a loadable polymer consisting essentially of(a) repeating units forming from 60 to 95 percent by weight of the polyumer derived from at least one of(i) acrylate esters having the formula ##STR11## where R8 is hydrogen or methyl andR9 is lower alkyl having from 1 to 5 carbon atoms;
- (ii) styrene-type monomers of the formula ##STR12## where R2 is hydrogen or methyl,R3, R4 and R6 are hydrogen or lower alkyl of from 1 to 5 carbon atoms,R5 is hydrogen or with R4 constitutes the atoms necessary to complete a fused benzene ring or one of R5 and R6 is halomethyl and(iii) vinyl acetate;
(b) repeating units forming from 5 to 15 percent by weight of the polymer derived from a hydrophilic ethenic monomer having a molecular weight of at most about 300 of the formula ##STR13## where R8 is as defined above,Q1 is --OM or a divalent organic radical which together with the carbonyl group of the formula forms an ester or amido linking group terminating in an ammonium or --SO3 M solubilizing group andM is hydrogen, ammonium or alkali metal;
(c) repeating uinits forming from 0 to 30 percent by weight of the polymer derived from an acrylamide of the formula ##STR14## R10 and R11 are hydrogen or an alkyl or haloalkyl subtituent having from 1 to 5 carbon atoms;
(d) repeating units forming from 0 to 10 percent by weight of the polymer derived from active methylene containing ethenic monomer exhibiting the formula ##STR15## R12 is hydrogen, alkyl having from 1 to 12 carbon atoms or ##STR16## R13 is alkyl having from 1 to 10 carbon atoms, cycloalkyl having from 3 to 10 carbon atoms, phenyl or ##STR17## R14 is alkylene having from 1 to 10 carbon atoms and X1 is cyano or alkylcarbonyl having from 1 to 8 carbon atoms,provided that one and only one of R12 and R13 is always ##STR18## (e) repeating units forming from 0 to 3 percent by weight of the polymer derived from a crosslinking monomer having a olecular weight of at most about 300 and having at least two independently polymerizable vinyl groups; and
(2) loaded into and distributed through said particles, a hydrophobic pesticide having a solubility in distilled water at 25°
C. of less than 0.5 percent and capable of being dissolved in a water-miscible organic solvent, the weight ratio of the hydrophobic pesticide to said loadable polymer being from 1;
3 to 1;
1.
1 Assignment
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Accused Products
Abstract
This invention is directed to compositions containing loaded particles of from 0.02 to 0.2 micron in average diameter consisting essentially of a loadable polymer. A hydrophobic insecticide, herbicide, miticide, hormone, vitamin, or enzyme is loaded into and distributed through the particles. The weight ratio of the hydrophobic compound to the loadable polymer is from about 1:40 to 3:1.
42 Citations
10 Claims
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1. A composition containing a continuous aqueous phase and loaded polymer particles having an average diameter of from 0.02 to 0.2 micron and consisting essentially of
(1) a loadable polymer consisting essentially of (a) repeating units forming from 60 to 95 percent by weight of the polyumer derived from at least one of (i) acrylate esters having the formula ##STR11## where R8 is hydrogen or methyl and R9 is lower alkyl having from 1 to 5 carbon atoms; -
(ii) styrene-type monomers of the formula ##STR12## where R2 is hydrogen or methyl, R3, R4 and R6 are hydrogen or lower alkyl of from 1 to 5 carbon atoms, R5 is hydrogen or with R4 constitutes the atoms necessary to complete a fused benzene ring or one of R5 and R6 is halomethyl and (iii) vinyl acetate; (b) repeating units forming from 5 to 15 percent by weight of the polymer derived from a hydrophilic ethenic monomer having a molecular weight of at most about 300 of the formula ##STR13## where R8 is as defined above, Q1 is --OM or a divalent organic radical which together with the carbonyl group of the formula forms an ester or amido linking group terminating in an ammonium or --SO3 M solubilizing group and M is hydrogen, ammonium or alkali metal; (c) repeating uinits forming from 0 to 30 percent by weight of the polymer derived from an acrylamide of the formula ##STR14## R10 and R11 are hydrogen or an alkyl or haloalkyl subtituent having from 1 to 5 carbon atoms; (d) repeating units forming from 0 to 10 percent by weight of the polymer derived from active methylene containing ethenic monomer exhibiting the formula ##STR15## R12 is hydrogen, alkyl having from 1 to 12 carbon atoms or ##STR16## R13 is alkyl having from 1 to 10 carbon atoms, cycloalkyl having from 3 to 10 carbon atoms, phenyl or ##STR17## R14 is alkylene having from 1 to 10 carbon atoms and X1 is cyano or alkylcarbonyl having from 1 to 8 carbon atoms, provided that one and only one of R12 and R13 is always ##STR18## (e) repeating units forming from 0 to 3 percent by weight of the polymer derived from a crosslinking monomer having a olecular weight of at most about 300 and having at least two independently polymerizable vinyl groups; and (2) loaded into and distributed through said particles, a hydrophobic pesticide having a solubility in distilled water at 25°
C. of less than 0.5 percent and capable of being dissolved in a water-miscible organic solvent, the weight ratio of the hydrophobic pesticide to said loadable polymer being from 1;
3 to 1;
1. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A composition containing a continuous aqueous phase and loaded polymer particles having an average diameter of from 0.02 to 0.2 micron and consisting essentially of
(1) a loadable polymer consisting essentially of (a) repeating units forming from 60 to 95 percent by weight of the polymer derived from at least one of (i) acrylate esters having the formula ##STR19## where R6 is hydrogen or methyl and R9 is lower alkyl having from 1 to 5 carbon atoms; -
(ii) styrene-type monomers of the formula ##STR20## where R2 is hydrogen or methyl, R3, R4 and R6 are hydrogen or lower alkyl of from 1 to 5 carbon atoms, R5 is hydrogen or with R4 constitutes the atoms necessary to complete a fused benzene ring or one of R5 and R6 is halomethyl and (iii) vinyl acetate; (b) repeating units forming from 0 to 25 percent by weight of the polymer derived from a hydrophilic ethenic monomer having a molecular weight of at most about 300 of the formula ##STR21## where R8 is as defined above, Q1 is --OM or a divalent organic radical which together with the carbonyl group of the formula forms an ester or amido linking group terminating in an ammonium or --SO3 M solubilizing group and M is hydrogen, ammonium or alkali metal; (c) repeating units forming from 0 to 30 percent by weight of the polymer derived from an acrylamide of the formula ##STR22## R10 and R11 are hydrogen or an alkyl or haloalkyl substituent having from 1 to 5 carbon atoms; (d) repeating units forming from 0 to 10 percent by weight of the polymer derived from active methylene containing ethenic monomer exhibiting the formula ##STR23## R12 is hydrogen, alkyl having from 1 to 12 carbon atoms or ##STR24## R13 is alkyl having from 1 to 10 carbon atoms, cycloalkyl having from 3 to 10 carbon atoms, phenyl or ##STR25## R14 is alkylene having from 1 to 10 carbon atoms and X1 is cyano or alkylcarbonyl having from 1 to 8 carbon atoms, provided that one and one one of R12 and R13 is always ##STR26## (e) repeating units forming from 0 to 3 percent by weight of the polymer derived from a crosslinking monomer having a olecular weight of at most about 300 and having at least two independently polymerizable vinyl groups; and (2) loaded into and distributed through said particles, a hydrophobic insecticide having a solubility in distilled water at 25°
C. of less than 0.5 percent and capable of being dissolved in a water-miscible organic solvent, the weight ratio of said insecticide to said loadable polymer being from 1;
3 to 1;
1. - View Dependent Claims (8, 9, 10)
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Specification