| 摘要 |
Organic solutions for pest control comprise compounds of the general formula R1-(R2) CH-CX3, X being chlorine or bromine, and R1 and R2 being cyclic-radicals linked by carbon atoms and without salt-forming groups, together with at least one crystallization inhibitor which is a non-volatile, neutral organic liquid of an oily consistency, the ratio of the total amount of inhibitor to the amount of the above defined compounds being from 1:1 to 4:1. Other insecticides or fungicides may be added. Specified crystallization inhibitors are the esters of glycol ether, adipic acid and phthalic acid, butyrophenone, laurophenone, dimethyl-laurophenone, lauroyl naphthalene, stearoyl-tetralin, paraffin oil, spindle oil, pine oil and tricresyl phosphate. The solutions may be used to impregnate permeable materials, or objects such as wool in any worked up form, hair, feathers, furs, body or bed linen, curtains or lamp shades. According to examples, (1) D.D.T. is dissolved in a mixture of phthalic acid methyl ester, benzyl alcohol and benzine; (2) D.D.T., trichlormethyl -3:31:4:41-tetramethyl-diphenyl-methane and dimethyl laurophenone are dissolved in "Sangajol" (Registered Trade Mark) being a benzine fraction boiling at 160-180 DEG C.; (3) D.D.T. and allyl o-chlorobenzoic acid allyl ester, pyrethium or rotenone are dissolved in phthalic acid ethyl ester and Sangajol; (4) D.D.T. and paraffin oil are dissolved in a mixture of methyl cyclopexanol and carbon tetrachloride. Alcohol, acetone and trichlorethylene are also referred to as suitable solvents. The insecticidal compounds in the examples may be replaced by p trichloromethyl-4:41-diethyl-diphenyl-methane, trichloromethyl-4-chloro -31:41-dimethyldiphenylmethane, trichloromethyl-b :b -dinaphthylmethane, trichloromethyl-4-chloro-41- ethyl diphenylmethane, trichloromethyl - 4 : 41 -dichloro-3 : 31 - dimethyldiphenylmethane and tribromomethyl-4:41 -dichloro-diphenylmethane. Specifications 572,998, 578,669 and 590,826, [Group VIII], are referred to. The Specification as open to inspection under Sect. 91 describes also the inclusion of thianthrene and dimethyl thianthrene as substances acting both as insecticides and as crystallization inhibitors. This subject-matter does not appear in the Specification as accepted. |
