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US 4,065,555 AGranted
Insecticidal compositions employing certain block copolymers
AssigneeShell Oil Company
InventorRichard C. Potter
Life of this patent
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Abstract
Slow release biocidal generators having a greater degree of flexibility with regard to generator size and release of biocide therefrom comprise a volatile liquid beta-halovinyl phosphate biocide dispersed in a blend of a block polymer and a plasticized vinyl chloride resin. The generators are insecticidally active.
Claims10
An insecticidal composition comprising
- a. 5-50% by weight of a volatile insecticidal compound of the formula ##STR3## wherein R is alkyl of 1 or 2 carbon atoms, X is O or S, R' is hydrogen or halogen and R" is halogen;
- b. 20-75% by weight of a polyvinyl chloride resin;
- c. 0-40% by weight of an insecticidally inert polyvinyl chloride resin plasticizer;
- and
- d. 1-30% by weight of a block copolymer of the formula
- A-B--A).sub.m, A-B--B-A).sub.n or A--B-A).sub.n
- wherein A is a polymer block of styrene or alpha-methyl styrene having a molecular weight of about 5,000 to 100,000, B is a polymer block of butadiene or isoprene having a molecular weight of about 15,000 to 500,000, m is 0 or 1 and n is an integer from 2 to 5 or the hydrogenated derivatives thereof.
4 more elements
An insecticidal composition comprising
- a. 5-50% by weight of a volatile insecticidal compound of the formula ##STR4## wherein R is alkyl of 1 or 2 carbon atoms, X is P or S, R' is hydrogen or halogen and R" is halogen;
- b. 20-75% by weight of a polyvinyl chloride resin;
- c. 0-40% by weight of an insecticidally inert polyvinyl chloride resin plasticizer;
- and
- d. 1-30% by weight of a block copolymer of the formula
- B--A--B).sub.m, B--A-A--B).sub.n or B--A--B).sub.n
- wherein A is a polymer block of styrene or alpha-methyl styrene having a molecular weight of about 5,000 to 100,000, B is a polymer block of butadiene or isoprene having a molecular weight of about 15,000 to 500,000, m is 0 or 1 and n is an integer from 2 to 5 or the hydrogenated derivatives thereof.
4 more elements
Dependencies are inferred from the claim text.