7 results about "Piperonyl butoxide" patented technology

The invention discloses piperonyl butoxide and a preparation method thereof. The preparation method comprises the following steps: carrying out mixing reaction on dihydrosassafras oil, acetyl chloride and trioxymethylene in the presence of concentrated hydrochloric acid; after the reaction is finished, chloromethyl material reaction liquid is obtained; mixing and reacting the chloromethyl material reaction liquid with sodium hydroxide and diethylene glycol monobutyl ether to obtain a product containing piperonyl butoxide. According to the preparation method of piperonyl butoxide, the dihydrosassafras oil, acetyl chloride and trioxymethylene are subjected to chloromethylation reaction in the presence of a small amount of concentrated hydrochloric acid, so that the use of a large amount of concentrated hydrochloric acid in the traditional process is avoided, and the problem of waste acid generated in the chloromethylation reaction process is solved; and meanwhile, the content of piperonyl butoxide in the product can be increased, and the content of piperonyl butoxide is ensured to be greater than 98%.

The present invention relates to a composition comprising piperonyl butoxide (PBO) in a concentration of 94 to 99.9% by weight, dipiperidinyl methane (DPM) in a concentration of 0.01 to 1% by weight and dipiperidinyl ether (DPE) in a concentration of 0 to 0.1% by weight, relative to the total weight of the composition, and a distillation process for obtaining the composition, the composition comprising piperonyl butoxide (PBO) in a concentration of from 94 to 99.9% by weight, dipiperidinyl methane (DPM) in a concentration of from 0.01 to 1% by weight, and dipiperidinyl ether (DPE) in a concentration of from 0 to 0.1% by weight.

The invention discloses a flavonoid fluorescent dye, a supramolecular fluorescent probe, a preparation method of the supramolecular fluorescent probe and a pyriproxyfen detection method. The probe is constructed by spontaneously assembling the albumin derivative and the flavonoid fluorescent dye in a buffer solution. The detection mechanism is shown as follows: the flavonoid dye presents characteristic red fluorescence in a free state, and obvious fluorescence blue shift is triggered after the flavonoid dye is combined with albumin. When pyriproxyfen is introduced into the system, hydrophobic molecules enter an albumin hydrophobic cavity in a competitive binding manner, so that dye molecules have a replacement effect. In the process, along with the bidirectional response of a fluorescence signal, namely, the yellow fluorescence intensity and the pyriproxyfen concentration are in negative correlation, and the reconstructed dye aggregation state triggers the enhancement of a green fluorescence channel signal, so that the quantitative conversion of the fluorescence chroma of the solution from yellow to green is finally realized. Based on the ratio-type fluorescence signal, the probe system has an obvious colorimetric effect when being used for detecting pyriproxyfen in environment, food and the like, and the color change can be directly observed by naked eyes.

The present application relates to the technical field of pesticides, and aims to solve the problem of how to improve the insecticidal effect of high-efficiency cypermethrin on aphids resistant to the pesticide, and discloses an active oxygen responsive nano-piperonyl butoxide synergist compound and application thereof in synergizing the control effect of high-efficiency cypermethrin on aphids. The active oxygen responsive nano-piperonyl butoxide synergist compound is composed of PLGA-TK-PEG and piperonyl butoxide loaded therein. Compared with free piperonyl butoxide, the active oxygen responsive nano-piperonyl butoxide synergist has the following advantages: rapid-acting property is enhanced, stability is greatly improved, can be released in response to ROS, has super-high resistance reversal capability, and the synergistic effect with high-efficiency cypermethrin is up to 54.22, and the 7-day control effect on resistant aphids is increased from 61.38% of free PBO treatment to 84.06%. Moreover, the active oxygen responsive nano-piperonyl butoxide synergist can be targetedly delivered, the carrier is biodegradable, PBO is released on demand, and the use amount and environmental residue can be reduced.

The present invention relates to a composition comprising piperonyl butoxide (PBO) in a weight concentration ranging from 94 to 99.9% by weight, dipiperonyl methane (DPM) in a weight concentration ranging from 0.01 to 1% by weight, and dipiperonyl ether (DPE) in a weight concentration ranging from 0 to 0.1% by weight, based on the total weight of the composition, and a distillation method for obtaining the same.

The application discloses an anti-aging long-acting insect-resistant polyethylene composite material and a preparation method thereof, and belongs to the field of plastic processing. The anti-aging long-acting insect-resistant polyethylene composite material is prepared from modified nano titanium dioxide which is prepared from KH550 silane coupling agent and rutile type nano titanium dioxide; polyethylene grafted maleic anhydride is prepared from high-density polyethylene and maleic anhydride as raw materials, and is compounded with compounded antioxidants, anti-ultraviolet agents, cis-cypermethrin, piperonyl butoxide, linear low-density polyethylene and high-density polyethylene, and the anti-aging long-acting insect-resistant polyethylene composite material is prepared by adopting a melt blending and extrusion molding method. The obtained anti-aging long-acting insect-resistant polyethylene composite material has excellent mechanical properties, anti-aging properties and insect-resistant properties, the mechanical properties are well maintained after aging, and the anti-aging long-acting insect-resistant polyethylene composite material still has certain insect-resistant properties.

The present invention relates to a method of combating and / or controlling a pest selected from the Noctuidae family and the Pieridae family, which comprises applying to said pest, to a locus of said pest, to a plant susceptible to attack by said pest, or to a plant propagation material susceptible to attack by said pest, a pesticidal composition comprising isocycloseram as active ingredient A, and piperonyl butoxide as active ingredient B.