Патент USA US2083984код для вставки
2,083,984 Patented June 15, 1937 UNITED STATES. PATENT OFFICE. " 2,083Q984 TREE BAND MATERIAL Guy H.v Buchanan, West?eld, N. J., assignor to American Cyanamid Company, New York, N. Y., a corporation of Maine No Drawing. Application December 30, 1932, Serial No. 649.598 '1 Claims.‘ (Cl. 167-49) - The present invention relates to an insecticide to combat the codling moth or the like. There has been proposed the use of an insecti cide compounded from a technical grade of beta 5 naphthol, and lubricating oil of the red engine type, by impregnating a paper band with the ma terial, which is then a?ixed or applied to a tree on which the codling moth larvae cocoon. The active insecticide is the beta naphthol, while the i0 lubricating oil is the carrier. Numerous experiments conducted along this line have disclosed that when the technical grade of beta naphthol is used, there is a tendency after a very short period of time for the beta naphthol 15 to crystallize or separate out of the oil carrier and ?ake off. This ‘flaking and separation of the active ingredient may occur either in shipment or handling of the bands impregnated with the mixture, or by reason of the action of wind and 20 rain upon the bands when in place on the trees. Obviously if this ?aking occurs, the e?iciency of the band as a combatting agent of the codling moth larvae is decreased by just that extent. The principal object of the present invention, then fused with caustic soda at temperatures ranging up to 300° C. or somewhat higher. When the fusion is completethe mass is again drowned in water and precipitated to effect separation of the beta naphthol. The latter is collected by ?ltration. This is a crude naphthol and contains isomeric bodies, hom'ologues, by-products and tar. To obtain a product of high purity, the 'crude may be carefully vacuum distilled. If the distilla tion is'too prolonged, impurities pass over with the distillate and the resulting product is of an inferior quality. Thetechnical product usually contains over 99%‘ beta naphthol. Technical speci?cations restrict the alpha naphthol content to 1/2%. ' 15 As above set forth, if this technical grade'of beta naphthol is used detrimental ?aking occurs, but this may be avoided if the puri?cation distil lation process of the crude beta naphthol is con ducted only to the point where substantial quanti ties of the tar or distillation residue remains in the product. As a matter of fact, the crude beta 20 naphthol maybe used without any puri?cation process whatever. On the other hand, the tech 25 therefore, is to produce a compound or mixture _ nical grade may be mixed with distillation resi 25 including beta naphthol which ,will not ?ake off dues or an oxynaphthoic resin to introduce into the ?nal product su?iclent quantities of the tarry even after long periods of time and under com ' paratively rough handling conditions, which may matters to give the desired eifect.' It is not possible to define the actual quantity be applied to the tree either direct or through of this tarry residue which normally occurs in the 30 30 the instrumentality of an absorbent medium. crude beta naphthol as much depends upon the . Experiments have very de?nitely pointed to the fact that some kind of a beta naphthol separation process of manufacture' As a preferred embodiment of the invention, a preventing material is necessary either for the purpose of de?nitely bonding beta naphthol to the 35 carrier, or to aid in the solubility of the beta naphthol in the oil carrier. ‘ ‘ It has been discovered that if a grade of beta naphthol of a purity less than the technical grade is used with a carrier, this detrimental ?aking is 40 prevented in a substantial degree. Further ex periments have pointed to the fact that the rea son for this action is the presence of the impuri ties in the beta naphthol which may be generally designated as beta naphthol tar. This impurity 45 may be an oxynaphthoic resin. Beta naphthol can be prepared by many meth ods. An accepted practice .is to sulphonate naphthalene with sulphuric acid of at least 66° Bé. at temperatures varying from 130° to 180° C. 50 The proportion of naphthalene to acid may be varied between wide limits, some procedures using at 1:1 ratio while other procedures go as high as 112. When the sulphonation is complete, the mass is drownedin water and the acid separated 55bycrrstallizlnsasasodasalt. Thissodasaltis proportion of beta naphthol to beta naphthol tar should be substantially 3: 1. 35 In most cases it is preferable that this beta naphthol of an ultimate purity less than technical be mixed with a carrier of an oily nature. Lubri cating oil of the red engine type has been found to be eminently satisfactory. It has been found, 40 however, that other oils whether of mineral, vegetable or animal origin, are suitable, although as above set forth, a red engine oil having a viscosity figure of 300 is preferable. A mixture of beta naphthol, beta naphthol ad 45, herent and 'oil in substantially the proportions of 3:1 to 1.5 have been found to be satisfactory for most purposes. In this combination the beta naphthol separation preventing material may be either beta naphthol tar, cocoanut oil fatty acid, aluminum ~.oleate, oleic acid, an oxynaphthoic resin, or in fact any other material which will prevent the separation of the beta naphthol from -.the oily carrier and subsequent ?aking. " It is to be noted that the beta naphthol tar, 65 2. 28,088,084 beta naphthol distillation residues or oxynaph obviously the invention is not to be restricted thoic resins as proposed above, to prevent sepa ' thereto but is to be construed broadly and ration. of the beta naphthol from the carrier or to only by the scope of the claims. increase the solubility of the beta naphthoi in the carrier. have certain desirable toxic properties. ' 1. An insecticide containing beta naphthol and I claim: _ ' - ' As a result of the use of these materials the total an oil carrier therefor and a material for prevent- . toxic effect of the beta naphthol is not diminished ing separation of the beta naphthol from the oil. as would be the case 'were'this separation pre venting ‘material vof a more or less inert nature. - 2. ‘An insecticide containing beta naphthol and an oil carrier therefor and a material for pre venting separation of the beta naphthol from the One convenient method of applying this insec-" oil including beta naphthol tar. 10 This, of course, is a decided advantage. ticide to trees is to impregnate an absorbent medium therewith. ‘ This medium may be paper, preferably of the crepe type, cloth or other fabric. cotton or in fact any material of a substantially absorbent nature or of a nature to which the mixtures will adhere. These bands are then ap plied to the tree by surrounding either the trunk or the limbs thereof. The codling moth larvae in 3. ' An insecticide containing beta naphthol and an oil carrier therefor and a material for prevent ing separation of the beta naphthol from the oil including the residue from a beta naphthol dis tillation. 4. An insecticide containing beta naphthol, an oil carrier therefor and a material for preventing separation of the beta naphthol from the carrier 20 seeking a dark place in which to cocoon, travel I including beta napthol tar‘, in substantially the 20 ‘beneath the band and there perform this natural ‘function. The beta naphthol carried by the mix ture is slowly given off so that the life within the .cocoon is subjected to the action thereof for a considerable period of time, resulting in death. ‘ Where it is inconvenient to apply the insecticide 30 proportions of 3: 1.5: 1. ' 5. An insecticide containing beta napthol, an oil carrier therefor and a toxic material to pre vent separation of the beta napthol from the car 25 tier. 6. A tree band including an absorbent medium mixtures to a band, the material'may be painted ‘or otherwise applied to the bark of the tree, which in itself acts as the absorbent medium with the impregnated with beta napthol, beta napthol tar same eil'ect. impregnated with beta naphthol, beta naphthol 30 - While the invention has been described with particular reference to a speci?c combination of materials and applied in a specific manner, yet and an oil. 7. A tree band including an absorbent medium tar and an oil in substantially the proportions of 3:'l:1.5. ‘ . ‘ ‘ GUY H. BUCHANAN.