4 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 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 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.