Abstract:
Pyrethroids which otherwise tend to induce paresthesia during handling are formulated for agricultural usage in a manner which lessens or avoids this tendency. This is achieved by using the pyrethroid in the form of a solution in an aromatic solvent having a flash point above 50 DEG C, the most preferred solvents being those with flash points within the range of about 90-125 DEG C. The formulations for which the invention is of particular interest are granular formulations.
Abstract:
An improved process for the prepatation of 2-chloro-4-toluenesulfonic acid by reacting 4-toluenesulfonic acid with chlorine in water or concentrated hydrochloric acid without the presence of a catalyst.
Abstract:
An apparatus and process for the production of agglomerated pellets from a polytetrafluoroethylene (PTFE) resin powder. Such agglomerated pellets are commonly used in moulding apparatus. The pellets of this invention exhibit better and more consistent flowability and higher, more consistent bulk density than those made by previously known apparatus and methods. The apparatus includes a tilted, heated polygonal tube (12) provided at its discharge end with an apertured plate (50) with centrally disposed circular opening (52).
Abstract:
The present invention is drawn to a device and process for killing cockroaches, which employ: a receptable (11, 12) defining at least one opening (15, 16) dimensioned to permit entry of a cockroach; and an amount of contact cockroach toxicant (18) effective to kill at least one cockroach, and an amount of cockroach attractant (17) effective to lure an adult cockroach, both of which one retained in said receptable (11, 12) in a spatial configuration such that a cockroach must come into contact with the toxicant (18) in order to reach (i.e. get to, or arrive at) the attractant (17). The instant invention may combine high acitivity fast-acting contact toxicant(s) (18) with a cockroach attractant(s) (17), in a manner which overcomes the previously encountered problem of a loss of attraction due to the presence of the toxicant (18).
Abstract:
Capsules capable of controlled release of 2-chloro-N-(ethoxymethyl)-6'-ethyl-o-acetotoluidide herbicide enclosed in a polyurea capsule produced by the process comprising encapsulating waterimmiscible material within discrete capsules of polyurea without addition of a second reactant, whereby hydrolysis of an isocyanate monomer to form an amine takes place which in turn reacts with another isocyanate monomer to form polyurea, which comprises the steps of: a) providing, at room temperature, a dispersion of (i) a water-immiscible phase comprising the herbicide and an organic polyisocyanate in (ii) an aqueous phase comprising a solution of water, a surfactant and a protective colloid; and b) heating and maintaining said dispersion in a temperature range from about 40 DEG C to about 90 DEG C, whereupon said herbicide is encapsulated within discrete polyurea capsular enclosures. The microencapsulated composition performs comparably to non-encapsulated compositions of the same herbicide applied at the same application rates, while maintaining substantially lower mammalian toxicity compared with the nonencapsulated formulations.
Abstract:
A process for the preparation of a 2-halo-4-(alkylsulfonyl)benzoic acid of structural formula (I), wherein halo is chloro or bromo and R is C1-C4 alkyl by the oxidation of 2-halo-4-(alkylsulfonyl)toluene under acid conditions.
Abstract:
Acylated substituted thiazolidines are formed in high yields by reaction of a substituted thiazolidine with an acyl halide in the presence of a buffer compound. The products are further purified by washing with a strong base. The products are useful as herbicides.
Abstract:
Herbicidal compounds of structural formula (I), wherein X is oxygen or sulfur; R is chlorine or bromine; R1 is hydrogen or C¿1?-C4 alkyl; R?2¿ is hydrogen or C¿1?-C4 alkyl; R?3¿ is hydrogen or C¿1?-C4 alkyl; R?4¿ is hydroxy, hydrogen or C¿1?-C4 alkyl; or R?3 and R4¿ together are carbonyl (=O) with the proviso that R?1, R2, R5 and R6¿ are all C¿1?-C4 alkyl; R?5¿ is hydrogen or C¿1?-C4 alkyl; R?6¿ is hydrogen, C¿1?-C4 alkyl, C1-C4 alkylthio, or C1-C4 alkylsulfonyl, with the proviso that when R?6 is C¿1-C4 alkylthio or C1-C4 alkylsulfonyl, then R?3 and R4¿ are not together carbonyl; R7 is methyl or ethyl; and R8 is (1) halogen; (2) nitro; or (3) RbSOn-wherein n is the integer 0 or 2; and Rb is (a) C¿1?-C3 alkyl; and their salts.
Abstract:
Aqueous dispersions of solids and dispersing agents which are derivatives of substituted succinic acids are disclosed. Methods of making and using such dispersions are also disclosed.
Abstract:
Ortho-nitrobenzonitriles are produced from the corresponding ortho-nitrochlorobenzenes by reaction with cuprous cyanide and an alkali metal bromide, an alkaline earth metal bromide, or zinc bromide or with a combination of lithium cyanide and cuprous bromide, optionally in the presence of a solvent.