Microcapsule insecticide composition

Claim 3

The method according to claim 1 wherein said shell stabilizer comprises a benzophenone substituted with an acidic group having a dissociation constant greater than 1 × 10 -6 .

Claim 4

The method according to claim 2 wherein said benzophenone is 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid.

Claim 5

The method according to claim 1 wherein said shell stabilizer comprises a benzophenone substituted with a group containing at least one active hydrogen.

Claim 6

The method according to claim 4 wherein said benzophenone is 2-amino-5-chlorobenzophenone.

Claim 7

The method according to claim 1 wherein said biological synergist is selected from the group consisting of 3,4-methylenedioxy-6-propylbenzyl butyldiethylene glycol ether and N-(2-ethylhexyl)-bicyclo[2.2.1]-5-heptene-2,3-dicarboximide.

Claim 8

The method according to claim 1 wherein said antioxidant comprises an alkylated phenol.

Claim 9

The method according to claim 7 wherein said alkylated phenol is octadecyl-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)-propionate.

Claim 10

The method according to claim 1 wherein said water-immiscible organic solvent is deodorized kerosene.

Claim 11

The method according to claim 1 wherein said fill stabilizer comprises a benzophenone.

Claim 12

The method according to claim 10 wherein said benzophenone is 4-dodecyloxy-2-hydroxybenzophenone.

Claim 13

The method according to claim 1 wherein said composition is applied to a sheet material prior to contacting said insects.

Claim 16

The method according to claim 1 wherein said shell stabilizer is chemically attached to said permeable polyurea shell wall.

Claim 17

The method according to claim 1 wherein said shell stabilizer is physicochemically held on said permeable polyurea shell wall.

Claim 18

A microcapsule insecticide composition comprising from about 60-90 percent liquid fill and from about 40-10 percent porous polyurea shell; wherein said liquid fill comprises from about a. 5-40 percent of pyrethroids selected from the group consisting of pyrethrin I, pyrethrin II, cinerin I, cinerin II, jasmolin II, allethrin, barthrin, dimethrin, resmethrin and tetramethrin; b. 20-40 percent of a water-immiscible organic solvent selected from the group consisting of pentane, nonane, decane and their analogs, benzene, toluene, xylene, deoderized kerosene, liquid parafin, parafin oil, light mineral oil and white mineral oil; c. 0.01-2 percent of an alkylated phenol antioxidant selected from the group consisting of 2,6-di-t-butyl cresol; 2,2'-methylene-bis-(6-t-butyl-4-methyl phenol); 2,2'-thio bis-(6-t-butyl-4-methyl phenol); pentaerythritol tetrakis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)]-propionate; 2,6-dioctadecyl-p-cresol and octadecyl-3-(3',5'-di-t-butyl-4'-hydroxyphenyl) propionate; d. 25-50 percent of a piperonyl alkyl ether synergist selected from the group consisting of 3,4-methylenedioxy-6-propylbenzyl butyldiethylene glycol ether and N-(2-ethylhexyl)-bicyclo[2.2.1]-5-heptene-2,3-dicarboximide; and e. 0.01-2 percent by weight of a benzophenone fill stabilizer selected from the group consisting of benzophenone; 2,4-dihydroxybenzophenone; 2-hydroxy-4-methoxybenzophenone; 2-hydroxy-4-octyloxybenzophenone; and 4-dodecyloxy-2-hydroxybenzophenone; and wherein said porous polyurea shell includes, as an integral part thereof, from about 0.5 - 20 percent of 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid as a shell stabilizer; and wherein said liquid fill permeates said porous polyurea shell wall over a sustained period of time and maintains an insecticidally effective level of pyrethroid upon the outer surface of said shell wall for an extended period of time in an environment having ultra violet light activity normally degrading to pyrethroid; and wherein all percentages are percentages by weight of said microcapsule insecticide composition.

Claim 19

A microcapsule insecticide composition comprising from about 60-90 percent liquid fill and from about 40-10 percent porous polyurea shell; wherein said liquid fill comprises from about a. 5-40 percent of pyrethroids selected from the group consisting of pyrethrin I, pyrethrin II, cinerin I, cinerin II, jasmolin II, allethrin, barthrin, dimethrin, resmethrin and tetramethrin; b. 20-40 percent of a water-immiscible organic solvent selected from the group consisting of pentane, nonane, decane and their analogs, benzene, toluene, xylene, deoderized kerosene, liquid parafin, parafin oil, light mineral oil and white mineral oil; c. 0.01-2 percent of an alkylated phenol antioxidant selected from the group consisting of 2,6-di-t-butyl cresol; 2,2'-methylene-bis-(6-t-butyl-4-methyl phenol); 2,2'-thio bis-(6-t-butyl-4-methyl phenol); pentaerythritol tetrakis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)]-propionate; 2,6-dioctadecyl-p-cresol and octadecyl-3-(3',5'-di-t-butyl-4'-hydroxyphenyl) propionate; d. 25-50 percent of a piperonyl alkyl ether synergist selected from the group consisting of 3,4-methylenedioxy-6-propylbenzyl butyldiethylene glycol ether and N-(2-ethylhexyl)-bicyclo[2.2.1]-5-heptene-2,3-dicarboximide; and e. 0.01-2 percent by weight of a benzophenone fill stabilizer selected from the group consisting of benzophenone; 2,4-dihydroxybenzophenone; 2-hydroxy-4-methoxybenzophenone; 2-hydroxy-4-octyloxybenzophenone; and 4-dodecyloxy-2-hydroxybenzophenone; and wherein said porous polyurea shell includes, as an integral part thereof, from about 0.5 - 20 percent of 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid as a shell stabilizer; and wherein said liquid fill permeates said porous polyurea shell wall over a sustained period of time and maintains an insecticidally effective level of pyrethroid upon the outer surface of said shell wall for an extended period of time in an environment having ultra violet light activity normally degrading to pyrethroid; and wherein all percentages are percentages by weight of said microcapsule insecticide composition.

Claim 20

A microcapsule insecticide composition according to claim 16 wherein said microcapsules are in the range of about 1 to 100 microns each and wherein said pyrethroids are selected from the group consisting of pyrethrin I, pyrethrin II, cinerin I, cinerin II and jasmolin II.

Claim 21

A microcapsule composition comprising about 25 percent porous polyurea shell wall and about 75 percent liquid fill; wherein said permeable shell comprises about 16 percent porous polyurea and 9 percent 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid as an integral part thereof; and wherein said liquid fill comprises about 36.9 percent of a solution of naturally occurring pyrethroids in deoderized kerosene, about 36.9 percent 3,4-methylenedioxy-6-propylbenzylbutyldiethylene glycol ether, about 0.7 percent 2,6-dioctadecyl-p-cresol and about 0.7 percent 4-dodecyloxy-2-hydroxybenzophenone; wherein said liquid fill permeates said porous polyurea shell over a sustained period of time and maintains an insecticidally effective level of pyrethroid upon the outer surface of said shell wall for an extended period of time in an environment having ultraviolet light activity degrading to pyrethroids; and wherein all percentages are percentages by weight of said microcapsule insecticide composition.

Claim 22

A microcapsule composition comprising about 25 percent porous polyurea shell wall and about 75 percent liquid fill; wherein said permeable shell comprises about 16 percent porous polyurea and 9 percent 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid as an integral part thereof; and wherein said liquid fill comprises about 36.9 percent of a solution of naturally occurring pyrethroids in deoderized kerosene, about 36.9 percent 3,4-methylenedioxy-6-propylbenzylbutyldiethylene glycol ether, about 0.7 percent 2,6-dioctadecyl-p-cresol and about 0.7 percent 4-dodecyloxy-2-hydroxybenzophenone; wherein said liquid fill permeates said porous polyurea shell over a sustained period of time and maintains an insecticidally effective level of pyrethroid upon the outer surface of said shell wall for an extended period of time in an environment having ultraviolet light activity degrading to pyrethroids; and wherein all percentages are percentages by weight of said microcapsule insecticide composition.