摘要:
A process for the preparation of organophosphorus derivatives of 2,4-di-tert-butylphenol with a high proportion of organophosphorus derivatives of biphenyl, which comprises reacting, in a first step, a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35, under Grignard conditions with magnesium to form the corresponding Grignard compound and this is further reacted in a second step with bis(2,4-di-tert-butylphenyl) chlorophosphite with the formation of a mixture in which at least 50% by weight of the phosphorus is combined in the form of tetrakis(2,4-di-tert-butylphenyl) 4,4'-biphenylenediphosphonite. The invention further relates to a polyolefin molding composition containing tetrakis(2,4-di-tert-butylphenyl) 4,4'-biphenylenediphosphonite which was prepared by reaction of a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35 with magnesium to form the Grignard compound and by subsequent reaction with bis(2,4-di-tert-butylphenyl) chlorophosphite. The invention furthermore relates to a process for the preparation of 4,4'-dihalomagnesium compounds of biphenyl by reacting a 4,4'-dihalobiphenyl whose halogen has an atomic weight of at least 35 in the absence of an entrainer, with fine-particle magnesium which is held in suspension.
摘要:
Diarylphosphinous acid aryl esters are made by the disclosed process. These compounds are useful for stabilizing plastics, in particular polymerization plastics, and hence can be incorporated into a plastic molding composition.
摘要:
A dibenzo-[c,e] [1,2] oxaphosphorine of the formula I and process of making said compound ##STR1## wherein n=1 or 2 and in which R.sup.1 is a monovalent or divalent aromatic radical wherein a Grignard compound R.sup.1 (MgHal).sub.n is reacted with 6-chloro-6H-dibenzo[c,e][1,2] oxaphosphorine.This compound optionally with phenolic antioxidants, provides stabilization in polymers.
摘要:
A process for the preparation of aryl phosphonites of the formula V ##STR1## wherein the radicals and n are defined in the disclosure. The invention further relates to a plastic molding composition, in particular a polyolefin molding composition containing aryl phosphonites of the formula V.
摘要:
Aryl esters of phosphonous halides of the formula I ##STR1## in which R' is a phenyl or benzyl radical which bears 1 to 3 substituents, .alpha.-methylbenzyl, .alpha., .alpha.-dimethylbenzyl, naphthyl or a naphthyl radical bearing 1 to 5 substituents, where the substituents are identical or different and are a non-aromatic hydrocarbon radical, an alkoxy radical or alkylthio radical each having 1 to 8 carbon atoms, aryl or aryloxy each having 6 to 10 carbon atoms or halogen having an atomic number from 9 to 35,R.sup.2 is a non-aromatic hydrocarbon radical having 1 to 18 carbon atoms, aryl, arylmethyl, arylethyl or arylisopropyl, where each aryl contains 6 to 10 carbon atoms,R.sup.3 is hydrogen or one of the groups mentioned under R.sup.2, andX is chlorine or bromine.The invention further relates to a process for the preparation of aryl esters of phosphonous halides of the formula I.
摘要:
The invention relates to a process for obtaining phosphorus acid-bis(2,4-di-tert-butylphenyl) ester halides in which a phosphorus acid-2,4-di-tert-butylphenyl ester dihalide is heated in the presence of a catalyst containing nitrogen or phosphorus, or both, to 130.degree. C. to 280.degree. C. and the phosphorus trihalide produced by disproportionation is removed from the reaction mixture.
摘要:
In order to prepare N-acylphosphinothricin diesters, acetals of methyl-(3-oxopropyl)phosphinic acid esters of the formula ##STR1## are reacted in a dipolar aprotic solvent with a carboxylic acid amide and carbon monoxide in the presence of hydrogen gas using a cobalt compound as a catalyst, where the radical R' is alkyl or aryl or aralkyl.