摘要:
An improved process for the preparation of 3,5-dialkyl-4-hydroxybenzoic acid comprising the reaction of 2,6-dialkylphenol and carbon dioxide in the presence of a mono- or polyalkylene glycol ether.
摘要:
The title compounds correspond to the formula ##STR1## where n is 1 and are characterized in that at least one of A, X or Y contains a group of formula ##STR2## these compounds being useful as stabilizers for organic polymers and lubricating oils to counteract the degradative effects of heat, light and air.
摘要:
Ortho-alkylated phenyl phosphonites of the formula ##STR1## wherein R.sup.1 is alkyl, phenyl or phenyl substituted by alkyl, R.sup.2 is tertiary alkyl or phenylalkyl, and R.sup.3 is hydrogen, alkyl or phenylalkyl are useful as stabilizers for organic polymers and lubricating oils, particularly as processing stabilizers for polyolefins.
摘要:
Alkylated 2,2'-biphenylene phosphonates are prepared by reacting alkylated 2,2'-biphenol with phosphoros trichloride in an organic solvent and then with a base such as sodium hydroxide. Said phosphonates are useful as stabilizers of organic polymers and lubricating oils, especially as stabilizers for polyolefins, polyesters, and polycarbonates.
摘要:
The compounds are trialkylsubstituted hydroxybenzylphosphonates and phosphinates having the formula ##STR1## WHEREIN R, R.sup.1 and R.sup.2 are independently lower alkyl or cycloalkyl groups, R.sup.3 is alkyl, alkyl substituted with one halogen atom, phenyl, phenyl substituted with alkyl groups, alkoxy, alkoxy substituted with one halogen group, phenoxy, phenoxy substituted with alkyl groups, alkylthioethoxy, alkylpolyoxyalkylenoxy, R.sup.4 is alkyl, alkylsubstituted with one halogen atom, cycloalkyl, phenyl, phenyl substituted with alkyl groups alkylthioethyl, thiobis-alkylene, alkyleneoxyalkylene, polyoxyalkylene, alkylpolyoxyalkylene, alkylene, polyvalent cyclic or acyclic hydrocarbon radical, R.sup.5 and R.sup.6 are independently hydrogen, alkyl of 1 to 12 carbon atoms, R.sup.6 may also be the group Ic ##STR2## OR TOGETHER R.sup.5 and R.sup.6 represent the group Id ##STR3## R.sup.7 is hydrogen, alkyl or phenyl, A is lower alkylene and n is 1 to 4. These compounds are usually prepared by reacting the trialkylsubstituted hydroxybenzyl or hydroxyphenylalkyl halide with the appropriate trialkyl or triaryl phosphite or appropriate substituted phosphonite.The compounds are useful as stabilizers of organic materials subject to oxidative, thermal and photochemical degradation.
摘要:
Metal salts of benzoyloxybenzoates having the formula ##STR1## wherein R.sup.1 and R.sup.2 are lower alkyl or cycloalkyl,R.sup.3 and R.sup.4 are hydrogen, lower alkyl or cycloalkyl,M is a metal or an alkylmetal moiety, andm is an integer from 1 to 4,Are useful as stabilizers of organic materials such as polyolefins.
摘要:
The compounds are esters and amides of trialkylhydroxyphenylalkanoic acid having the formula ##SPC1##Wherein R, R.sup.1 and R.sup.2 are independently lower alkyl or cycloalkyl groups, R.sup.3 is hydrogen, alkyl, cycloalkyl, alkylene, phenyl, phenyl substituted by alkyl groups, alkylthioethyl, thiobis-alkylene, alkyleneoxyalkylene, polyoxyalkylene or a polyvalent cyclic or acyclic hydrocarbon radical, R.sup.4 is hydrogen, lower alkyl, cycloalkyl, R.sup.5 is hydrogen, alkyl, phenyl, phenyl substituted with alkyl groups, alkylene, polyoxyalkylene or polyvalent cyclic or acyclic hydrocarbon radical, A is lower alkylene, m is 1 to 4 and n is 1 to 6.The ester compounds of this invention are prepared via usual esterification procedures from a suitable alcohol and an acid of the formula I ##SPC2##or an acid halide or acid anhydride thereof. The higher alkyl esters can also be prepared from the lower alkyl ester, especially the methyl ester of the above represented compounds, by transesterification with a higher alkanol.The amide compounds of this invention are prepared by usual amidation procedures by reacting a carboxylic acid of formula I or an acid chloride or anhydride or a lower alkyl ester thereof with the appropriate amine.The compounds are useful as stabilizers for organic materials, especially polyolefins, which deteriorate upon exposure to light and heat.
摘要:
Organic polymeric materials normally subject to oxidative and ultraviolet light deterioration are stabilized by incorporating therein a nickel 3,5-bis-dialkyl-4-hydroxybenzoate, an ultraviolet light absorber such as benzophenone or a benzotriazole, and optionally a primary phenolic antioxidant with or without a secondary sulfur containing antioxidant.
摘要:
Substituted (4-hydroxyphenylthioalkyl) derivatives of the formula ##STR1## are prepared by the reaction of the appropriate ring and hydroxybenzene thiol compounds and are useful stabilizers of organic materials.
摘要:
Long chain (4-hydroxyphenyl) propanoate derivatives of the formula ##STR1## are effective in stabilizing organic materials against oxidative and thermal degradation.