摘要:
Compounds of the formula: ##STR1## wherein R, R' and R.sup.2 are alkyl radicals having 1 to 20 carbon atoms, phenyl radicals which may be substituted by 1 or 2 alkyl groups having 1 to 8 carbon atoms, aralkyl radicals having 7 to 12 carbon atoms, or cycloalkyl radicals having 5 to 12 carbon atoms; and wherein R.sup.3 is hydrogen or an alkyl radical having from 1 to 4 carbon atoms. These compounds have utility as synergistic stabilizers with phenolic type antioxidants for the stabilization of organic materials such as natural and synthetic polymers, rubbers, lubricants and oils, etc.
摘要:
A combination of a phenolic antioxidant, such as the butylated reaction product of p-cresol and dicyclopentadiene and an ester such as 3,6,9-trioxaundecamethylene bis [3-(dodecylthio)propionate] is used to stabilize polymers against oxidative degradation.
摘要:
Antioxidants such as 2-(3,5-di tert.butyl-4-hydroxybenzyloxy) ethyl acrylate and 2-(3,5-di tert.butyl-4-hydroxybenzyloxy) ethyl methacrylate, age resistant polymers having age resistors physically combined therewith and age resistant polymeric compositions prepared by emulsion free radical polymerization techniques involving the use of said age resistors as monomers.
摘要:
N,N'-bis(4-anilinophenyl)-4,7-dithia-5-methyldecanediamide and related antioxidants are used to offer protection to unvulcanized and vulcanized polymers. They are particularly effective in stabilizing vulcanized NBR when it is exposed to high temperature aging.
摘要:
Ester age resisters such as 4-anilinophenyl acrylate and 4-anilinophenyl methacrylate, age resistant polymers having ester age resisters physically combined therewith and age resistant polymeric compositions prepared by free radical polymerization techniques involving the use of said esters as monomers.
摘要:
An expanded metal battery grid and process for making same which grid has a supporting border comprising a thermoplastic ribbon folded lengthwise around the grid's edge and ultrasonically bonded to itself through interstices in the grid.
摘要:
There is disclosed a process comprising reacting a compound having the general structural Formula II: ##STR1## with a compound having the general Formula III: ##STR2## in the presence of a basic catalyst while dissolved in an organic solvent to yield an aldehyde having the structural Formula I: ##STR3## wherein R.sub.1 and R.sub.2 are the same or different radicals selected from the group consisting of tertiary alkyl radicals having from 4 to 12 carbon atoms, R.sub.3 and R.sub.4 are the same or different radicals selected from the group consisting of alkyl radicals containing from 1 to 12 carbon atoms, cycloalkyl radicals containing from 5 to 12 carbon atoms, phenyl and substituted phenyl radicals or R.sub.3 and R.sub.4 with the carbon atom to which they are joined may form a cycloalkyl ring of from 5 to 12 carbon atoms, R.sub.5 is selected from the group consisting of hydrogen, alkyl radicals containing from 1 to 12 carbon atoms, or a cycloalkyl radical containing 5 or 6 carbon atoms.
摘要:
Amide and imide age resistors such as N-(3,5-di tert.butyl-4-hydroxyphenyl) acrylamide and N-(3,5-di tert.butyl-4-hydroxyphenyl) itaconimide, age resistant polymers having amide and imide age resistors physically combined therewith and age resistant polymeric compositions prepared by free radical polymerization techniques involving the use of said amides and imides as monomers.
摘要:
Ester age resisters such as 4-anilinophenyl acrylate and 4-anilinophenyl methacrylate, age resistant polymers having ester age resisters physically combined therewith and age resistant polymeric compositions prepared by free radical polymerization techniques involving the use of said esters as monomers.
摘要:
2,6-Di tert alkyl-4-vinylphenols are copolymerized in free radical emulsion polymerization systems to form self-stabilizing polymers. Such polymers have the advantage that the antioxidant cannot be extracted or volatilized from the polymer.