摘要:
The present invention discloses a process for the preparation of tetrahydro-N-[1-methyl-1-[3-(1-methylethenyl)phenyl]ethyl]-2-oxo-1-H-pyrrolo-1-carboxamide which is comprised of (1) reacting m-isopropenyl .alpha.,.alpha.-dimethylbenzylisocyanate with 2-pyrrolidinone at a temperature which is within the range of about 80.degree. C. to about 150.degree. C. to produce a molten reaction product; (2) mixing the molten reaction product with an aqueous emulsifier solution to form an aqueous medium, wherein the aqueous emulsifier solution contains from about 0.1 weight percent to about 10 weight percent emulsifier, and wherein the weight ratio of the molten reaction product to the emulsifier solution in the aqueous medium is within the range of 1:0.5 to 1:100; (3) allowing the tetrahydro-N-[1-methyl-1-[3-(1-methylethenyl)phenyl]ethyl]-2-oxo-1-H-pyrrolo-1-carboxamide in the aqueous medium to crystallize under conditions of agitation into the form of essentially spherical particles; and (4) recovering the tetrahydro-N-[1-methyl-1-[3-(1-methylethenyl)phenyl]ethyl]-2-oxo-1-H-pyrrolo-1-carboxamide particles from the aqueous medium by filtration.
摘要:
The present invention relates to a process for the production of organosilicon compounds of the formulaZ--Alk--S.sub.n --Alk--Z (I)in which Z is selected from the group consisting of ##STR1## where R.sub.1 is an alkyl group of 1 to 4 carbon atoms, cyclohexyl or phenyl;R.sub.2 is alkoxy of 1 to 8 carbon atoms, or cycloalkoxy of 5 to 8 carbon atoms;Alk is a divalent hydrocarbon of 1 to 18 carbon atoms and n is an integer of 2 to 8; comprising reacting (A) a compound of the formula:Z--Alk--X (II)when X is Cl, Br or I; with (B) a compound of the formulaMe.sub.2 S.sub.n (III)where Me is ammonium, or an alkali metal;wherein the reaction is conducted in the presence of a phase transfer catalyst an aqueous phase and a salt of the formulaXY (IV)orX.sub.2 SO.sub.4 (V)where X is selected from the group consisting of Li, Na, K, Rb and Cs; and where Y is selected from the group consisting of Fl, Cl and Br.
摘要:
The present invention relates to a process for the production of organosilicon compounds of the formulaZ-Alk-S.sub.n -Alk-Z (I)in which Z is selected from the group consisting of ##STR1## where R.sub.1 is an alkyl group of 1 to 4 carbon atoms, cyclohexyl or phenyl;R.sub.2 is alkoxy of 1 to 8 carbon atoms, or cycloalkoxy of 5 to 8 carbon atoms;Alk is a divalent hydrocarbon of 1 to 18 carbon atoms and n is an integer of 2 to 8; comprising reacting (A) a compound of the formula:Z-Alk-X (II)when X is Cl, Br or I; with (B) a compound of the formulaMe.sub.2 S.sub.n (III)where Me is ammonium, or an alkali metal;wherein the reaction is conducted in the presence of a phase transfer catalyst and an aqueous phase.
摘要翻译:本发明涉及一种制备式Z-Alk-Sn-Alk-Z(I)的有机硅化合物的方法,其中Z选自下组,其中R 1是1至 4个碳原子,环己基或苯基; R 2是1至8个碳原子的烷氧基或5至8个碳原子的环烷氧基; Alk为1〜18个碳原子的二价烃,n为2〜8的整数, 包括当X是Cl,Br或I时,使(A)式:Z-Alk-X(II)的化合物反应; 与(B)式Me2Sn(III)的化合物,其中Me是铵或碱金属; 其中反应在相转移催化剂和水相存在下进行。
摘要:
The diimide hydrogenation of unsaturated elastomers in latex utilizing hydrazine and hydrogen peroxide or oxygen, is a metal-catalyzed process. Copper ion has been found to be the most superior catalyst for this reaction, requiring an extremely low concentration for optimal results. Generated diimide efficiently hydrogenates the polymer olefinic unsaturation while generating water and nitrogen as byproducts. With a falling hydrazine concentration during the hydrogenation process however, a competing copper-catalyzed process capable of generating hydroxyl, superoxide and/or copper-oxyl radicals becomes increasingly competitive. The ability of these radical species to abstract hydrogen from the polymer backbone to generate polymeric radicals, ultimately results in crosslinking that occurs concurrently with hydrogenation. The concept of an OH radical inactivating ligand (OIL) complexed with copper is demonstrated to ameliorate the crosslinking reaction.
摘要:
The present invention relates to a process for the preparation of a latex of hydrogenated elastomeric polymer comprising:(1) combining an unsaturated polymer in latex form with(a) an oxidant selected from the group consisting of oxygen, air and hydroperoxide;(b) a reducing agent selected from hydrazine and hydrates thereof; and(c) a metal ion activator;(2) heating the mixture to a temperature from 0.degree. C. to the reflux temperature of the reaction mixture;(3) treating the mixture with ozone in an amount and under conditions which are sufficient for the ozone to react with residual polymer unsaturation to form an ozonated latex of elastomeric polymer having at least one terminal aldehyde end group;(4) treating the ozonated latex with hydroxylamine in an amount and under conditions which are sufficient to convert aldehyde end groups of the elastomeric polymer to oxime end groups to form a oximated polymer latex.
摘要:
The present invention relates to a blend of rubber latices comprising, based on dry weight,(A) from about 80 to about 50 phr of a latex selected from the group consisting of polybutadiene latex, natural rubber or polyisoprene latex, styrene-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, butadiene-isoprene copolymer latex, isoprene-isobutylene copolymer latex, styrene-isoprene-butadiene copolymer latex and mixtures thereof: and(B) from about 20 to about 50 phr of a hydrogenated rubber latex that is prepared in accordance with a process comprising:(1) combining an unsaturated polymer in latex form, which is derived from 5 to 100 percent by weight of a conjugated diene monomer and 95 to 0 percent by weight of an ethylenically unsaturated monomer, with(a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides;(b) a reducing agent selected from hydrazine and hydrates thereof: and(c) a metal ion activator;(2) heating the mixture to a temperature from 0.degree. C. to the reflux temperature of the reaction mixture.
摘要:
This invention is directed to the preparation of polymerizable monomers that are prepared from 1-(1-isocyanato-1-methylethyl)-3-(1-methylethenyl) benzene (m-TMI) and 1-(1-isocyanato-1-methylethyl)-4-(1-methylethenyl) benzene (p-TMI). The monomers prepared from m- and p-TMI can contain numerous chemical moieties, and when polymerized, produce polymers that have chemically bonded to the polymeric backbone the functional moiety. More specifically, these TMI derived monomers may contain chain breaking antioxidant moieties, peroxide decomposing antioxidant moieties, ultraviolet stabilizing moieties, triplet quenching moieties, and other chemical moieties that are useful in polymers.
摘要:
There is disclosed a process for the modification of a chloromethylated latex wherein said latex contains a surfactant of a nonionic or ionic-type comprising contacting said latex with an aqueous alkali solution and an alkali ionizable molecule containing antidegradant properties at a reaction temperature below 100.degree. C. and in the presence of a nitrogen atmosphere.
摘要:
There is disclosed an improved process for the destruction of halogenated organic compounds through treatment with an alkali metal aromatic radical anion reagent wherein the improvement comprises the elimination of the water quench step.
摘要:
This invention comprises an alkylation, reduction and transesterification process for the preparation of ester substituted phenols. The products are useful as antioxidants and may be prepared in high yields and with a high degree of purity.