US 1955891 A
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Patented Apr. 24, 1934 UNITED STATES PARASITICIDES AND NIETHOD OF MOTHPROOFING;
Paul Lawrence Salzberg and Frederick Madison Meigs, Wilmington, Del., assignors to E. I. du Pont de Nemours & Company, Wilmington,
Del.,' a corporation of Delaware Application December 6, 1930,
Serial No. 500,667
This invention relates to a process and to new agents for protecting materials from parasite attack, and more particularly. to an improved process for moth-proofing materials susceptible 5 to attack by moth larvaa.
Inorganic fluorides, such as sodium fluoride, sodium silicofluoride, and also boron trifluoride addition products of organic compounds are known in'the art as moth-proofing agents. The
recognition of the marked advantages attending the use of organic fluorine compounds as para.- siticides, and particularly as moth-proofing agents is, however, believed to be new.
This invention has as an object an improved l5 process for destroying parasites and the utilization of new compounds for this purpose. Another object is to eifectively render materials or fabrics such as wool, fur, hair, feathers, and the like, immune toattack by moth larvae. A still further object is the moth-proofing of closed containers.
These objects are accomplished by the following invention in which materials subject to parasite attack, particularly those subject to attack by parasites such as moth or carpet beetle larvae,
are treated with an organic fluorine compound, the treatment being preferably effected thru impregnation of the material by immersion in a solution of the organic fluorine compound and then drying the material.
The material to be moth-proofed is steeped in a solution of an organic fluorine compound of the general type formula RF in which R designates an organic residue directly attached to fluorine thru carbon. The organic residue R may be a straight hydrocarbon group or it may be a hydrocarbon group'modified by organic or inorganic substituents such as carboxy, amino, nitro or sulfonic acid radicals.
the purpose of the present invention and falling within the class mentioned are the following:
- Centigrade Alpha-fluoronaphthalene b.p. 216
Beta-fluoronaphthalene m. p.-- 59 O-fluorodiphenyl m.p. 73.5 P-fluorodiphenyl m.p. 742
P, p'-difluorodiphenyl m.p 94
4-fiuoroacetanilide m. p.
Among the suitable compounds, efiective for- Centigrade 4- -fiuorobenzoic acid m.p.- 182 Z-fluorobenzoic acid m.p. 120' 4-fluorophenetol b. p... 197 S-fluoro, 4-methoxybenzoic acid m.p. 204 Phenyl fluoroform b.p. 103.5 Monofiuoroacetic acid b.p. l-fluoro, 1.2-dibromoethane b. p. 122.5
material may, however, be dried without centrifuging by any suitable means to remove the solvent. moth-proofing agents comprised of organic fluorine compounds 'may also be applied as a spray for rendering materials moth-proof.
. It is to be understood that the practice of our invention is not limited to the use of organic fluorine compounds in solution but includes the use of the compounds in solid form, in which form they are applicable in closed containers such as clothes closets, cedar chests, trunks, containers for shipping, and the like, because the vapors of these compounds are toxic to moths and render such containers moth-proof. The
association of the type of compounds disclosed is present in a form soluble in organic solvents.
These compounds can, therefore, be introduced in the solvents used in the ordinary dry-clean-v ing process. A further advantage resides in the fact that these materials are stable toward water, whereas many of the other moth-proofing agents such as the boron trifluoride addition The solutions or emulsions of our new 'is to be understood that we do not limit ourselves to the specific embodiments thereof except as defined in the appended claims.
1. Material subject to parasite attack treated with an organic fluorine compound selected from the class consisting offiuoronaphthalenes, fluorodiphenyls, fluoranilides, fluorophenols, fluoroacetic acid and phenyl fiuoroform.
2. A parasiticide comprising an organic fluorine compound selected from the class consisting of fluoronaphthalenes, fluorodiphenyls, fluoroanilides, fluorophenols, fluoroacetic acid and phenyl fiuoroform.
3. Material subject to parasite attack treated P with an organic fluorine compound selected from the class consisting of fiuoronaphthalenes, fluorodiphenyls, fiuoroanilides, fluorobenzoic acid, fluorophenols, fiuoroacetic acid and phenyl fluoroform.
4. A parasiticide comprising an organic fluorine compound selected from the class consisting of fiuoronaphthalenes, fluorodiphenyls, fluoroanilides, fluorobenzoic acid, fluorophenols, fluoroacetic acid and phenyl fiuoroform.
PAUL LAWRENCE SALZBERG. FREDERICK MADISON MEIGS.