Polyhdroxy polymer delivery system

Claim 2

A controlled release biologically active composition comprising a biologically active agent contained in a matrix of a water soluble/swellable polyhydroxy polymer system, an inorganic salt selected from the group of sulfates, phosphates and mixtures thereof, and optional filler(s).

Claim 3

The composition of claim 1 wherein the biologically active agent is selected from the group of insecticides, herbicides, plant growth regulators, nematocides, fungicides, bactericides, rodenticides, fumigants, animal and insect repellents, biological insect control agents, pheromones, sex lures, flavor and odor compositions, diet supplements, and drugs.

Claim 4

The composition of claim 1 wherein the biologically active agent is 0,0-dimethyl-0-p-nitrophenyl phosphorothioate, 0,0-diethyl-O-p-nitrophenyl phosphorothioate, 0-ethyl-S,S-dipropyl phosphorodithioate, S-[[(1,1-dimethylethyl)-thio]methyl]-0,0-diethyl phosphorodithioate, 0,0-dimethyl-0-(3-methyl-4-nitrophenyl) phosphorothioate, 0,0-diethyl-S-[(ethylthio)methyl] phosphorodithioate, 0-ethyl-S-phenylethyl- phosphonodithioate, 0,0-diechyl-0-(3,5,6-trichloro-2-pyridyl) phosphorothioate, 0,0-diethyl-0-(2-isopropyl-6-methyl-5-pyrimidinyl) phosphorothioate, α,α,α-trifluro-2,6-dinitro-N, N-dipropyl-p-toluidine, N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine, N-(2-chloroethyl)-α,α,α-trifluoro-2,6-dinitro-N,N dipropyl-p-toluidine, N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine, N-(2-chloroethyl)-α,α,α-trifluoro-2,6-dinitro-N-propyl-p-toluidine, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl) acetamide, and 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1- methylethyl acetamide

Claim 5

The composition of claim 1 wherein the polyhydroxy polymer system is selected from the group of polyvinyl alcohols, unmodified, modified and substituted starches, dextrins, natural gums, and mixtures thereof.

Claim 6

The composition of claim 1 wherein the inorganic salt is selected from the group of sulfates.

Claim 7

The composition of claim 1 wherein the inorganic salt is selected from the group of phosphates.

Claim 8

The composition.of.claim 1 wherein the inorganic salt is a sulfate selected from the group of alkali, ammonium, magnesium, calcium, iron, zinc, aluminum and mixed alkali/aluminum sulfates, and mixtures thereof.

Claim 9

The composition of claim 1 wherein the inorganic salt is a phosphate selected from the group of alkali and ammonium phosphates, and mixtures thereof.

Claim 10

The composition of claim 1 wherein the inorganic salt is a mixture of sulfates and phosphates.

Claim 11

The composition of claim 1 wherein the filler is selected from the group of diatomites, attapulgites, bentonites, talcs, montmorillonites, kaolins, perlites, vermiculites, and corn cob grits.

Claim 12

The composition of claim 1 wherein the biologically active agent is 0,0-diethyl-0-(3,5,6-trichloro-2-pyridyl) phosphorothioate, the polyhydroxy polymer is selected from the group of polyvinyl alcohols, unmodified, modified and substituted starches, natural gums and dextrins; and the inorganic salt is calcium sulfate.

Claim 13

The composition of claim 1 wherein the biologically active agent is 0,0-dimethyl- or 0,0-diethyl-0-p-nitrophenyl phosphorothioate, the polyhydroxy polymer is selected from - the group of polyvinyl alcohols, unmodified, modified and substituted starches, natural gums and dextrins, the inorganic salt is selected from the group of alkali, ammonium, magnesium and calcium sulfates, and the filler is selected from the group of diatomites, attapulgites, bentonites, talcs, montmorillonites, kaolins, and corn cob grits.

Claim 14

A process for making a controlled release biologically active composition which comprises emulsifying/dispersing a biologically active agent, optionally on a filler, in an aqueous polyhydroxy polymer system, adding an inorganic sulfate, phosphate or both and optional filler(s) while thoroughly mixing, drying the product, and reducing the product to the desired particle size.

Claim 15

A process for making a controlled release biologically active composition which comprises emulsifying/dispersing a biologically active agent, optionally on a filler, in an aqueous polyhydroxy polymer system, adding an inorganic sulfate, phosphate or both and optional filler(s) while thoroughly mixing, drying the product, and reducing the product to the desired particle size.

Claim 16

A process for making a controlled release biologically active composition which comprises emulsifying/dispersing a biologically active agent, on or together with an inorganic sulfate, phosphate or both plus an optional filler, in an aqueous polyhydroxy polymer system, drying the product, and reducing the product to the desired particle size.

Claim 17

A process for making a controlled release biologically active composition which comprises emulsifying/dispersing a biologically active agent, on or together with an inorganic sulfate, phosphate or both plus an optional filler, in an aqueous polyhydroxy polymer system, drying the product, and reducing the product to the desired particle size.

Claim 18

A process for making a controlled release biologically active composition comprising emulsifying/dispersing a biologically active agent,; on or together with an inorganic sulfate, phosphate or both plus optional filler, in an aqueous polyhydroxy polymer system, adding another portion of an inorganic sulfate, phosphate or mixtures thereof and optional filler while thoroughly mixing, drying the product, and reducing the product to the desired particle size.

Claim 19

A process for making a controlled release biologically active composition comprising emulsifying/dispersing a biologically active agent,; on or together with an inorganic sulfate, phosphate or both plus optional filler, in an aqueous polyhydroxy polymer system, adding another portion of an inorganic sulfate, phosphate or mixtures thereof and optional filler while thoroughly mixing, drying the product, and reducing the product to the desired particle size.

Claim 20

The process of claim 13 wherein the biologically active agent is 0,0-dimethyl- or 0,0-diethyl-0-p-nitrophenyl phosphorothioate, the polyhydroxy polymer is selected from the group of polyvinyl alcohols, unmodified, modified and substituted starches, natural gums and dextrins, the inorganic salt is selected from the group of alkali, ammonium, aluminum, and magnesium sulfates, and the optional filler is selected from the group of diatomites, attapulgites, bentonites, talcs, montmorillonites, kaolins, perlites, vermiculites, and corn cob grits.

Claim 21

The process of claim 14 wherein the biologically active agent is 0,0-diethyl-0-(3,5,6-trichloro-2-pyridyl) phosphorothioate, the polyhydroxy polymer is selected from the group of polyvinyl alcohols, unmodified, modified and substituted starches, natural gums, and dextrins, and the inorganic salt is calcium sulfate.

Claim 22

The process of claim 13 wherein the biologically active - agent is 0,0-dimethyl- or 0,0-diethyl-0-p-nitrophenyl phosphorothioate, the polyhydroxy polymer is selected from the group of polyvinyl alcohols, unmodified, modified and substituted starches, natural gums and dextrins, the inorganic salt is selected from the group of alkali phosphates and mixtures thereof, and the filler is selected from the group of diatomites, attapulgices, bentonites, talcs, montmorillonites, kaolins, perlites, vermiculites, and corn cob grits.

Claim 23

A process for preparing the controlled release composition of claim 1 comprising co-precipitating a hydrophilic polymer with a water insoluble biologically active agent by the addition'of an inorganic salt selected from sulfates, phosphates, or mixtures thereof.

Claim 24

The process of claim 19 in which the hydrophilic polymer is starch, polyvinyl alcohol or a mixture thereof.

Claim 25

The process of claim 20 in which the biologically active material is an herbicide.

Claim 26

The process of claim 21 in which the herbicide is a nitro compound.