Abstract:
The present invention relates to additive composition for control and inhibition of polymerization of styrene, wherein the composition comprises amine and quinone methide, and wherein the amine is polymerization non-inhibitor amine. In one embodiment, the present invention relates to method of preparation and use of additive composition to control and inhibit polymerization of styrene, wherein the composition comprises amine and quinone methide, and wherein the amine is polymerization non-inhibitor amine. In another embodiment, the present invention relates to additive composition for control and inhibition of polymerization of styrene, wherein the composition comprises oxide treated derivative of amine and quinone methide, and wherein the amine is polymerization non-inhibitor amine, and to the method of preparation and use thereof.
Abstract:
The present invention relates to a compound represented by the following general formula (I): wherein R1 and R2 independently represent a monovalent hydrocarbon group; R3 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; X represents a divalent hydrocarbon group; and R4, R5 and R6 independently represent a monovalent organic group or a group represented by the following general formula (II): in which R7 and R8 independently represent a monovalent hydrocarbon group; and R9 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, with the proviso that R5 and R6 may combine together to form a divalent hydrocarbon group. The aforementioned compounds are useful as a polymerization inhibitor and the like.
Abstract:
Alkylated antioxidant macromolecules are represented by Structural Formula 1: wherein the variables are described herein. Also included are methods of making the molecules and methods of using the molecules as antioxidants.
Abstract:
This invention relates to a process of inhibiting the polymerization of vinyl-containing materials through the use of an effective amount of a polymerization inhibitor comprising quinone diimide and a nitroxyl stable free radical under various conditions. This invention also relates to the polymerization inhibitor composition.
Abstract:
Phenolic amides, useful as stabilizers for organic materials such as polyols and polyurethanes, possess the general formula ##STR1## wherein n is 0 to 3, R.sub.1, is alkyl of from 1 to about 6 carbon atoms, R.sub.2 is hydrogen or alkyl of from 1 to about 6 carbon atoms, R.sub.3 is hydrogen or hydrocarbyl of up to about 20 carbon atoms, optionally containing one or more heterocyclic groups, R.sub.4 is hydrocarbyl of up to about 20 carbon atoms, optionally containing one or more heterocyclic groups, or R.sub.3 and R.sub.4 together with the nitrogen atom to which they are bonded are joined together to form a heterocyclic group, optionally containing one or more additional heterocyclic atoms.
Abstract:
The polymerization of a vinyl aromatic monomer such as styrene is inhibited by the addition of a composition of a benzoquinone derivative and a hydroxylamine compound.
Abstract:
Substituted hydroxylamine ester stabilizers corresponding to the formula ##STR1## wherein n is 0-2, X is a direct bond, --S-- or --CH.sub.2 S--, R.sub.1 and R.sub.2 are independently hydrogen, alkyl, cycloalkyl, aralkyl, R.sub.3 and R.sub.4 are independently alkyl, cycloalkyl or aralkyl, and R.sub.5 is hydrogen or the group ##STR2## are effective in stabilizing organic materials against oxidative, thermal and actinic degradation.
Abstract:
A stabilizer system containing at least one compound of the formula I ##STR1## and one compound of the formula II ##STR2## the substituents R.sup.1, R.sup.2, R and R' having the meanings defined in the text, and x being 1 to 3. This stabilizer system is suitable for use as an additive to a polyalkylene glycol base liquid for preventing the formation of rust, especially on iron-containing surfaces, the use of these lubricant compositions being possible also in the high-temperature range.
Abstract:
A stabilizer suitable for use to protect organic materials into which it is soluble or miscible against oxidative degradation having the general formula ##STR1## wherein R.sub.1 and R.sub.2 are lower alkyl or a radical of the structure ##STR2## wherein "x" represents a tertiary butyl radical.
Abstract:
Novel compounds of the general formula: ##STR1## wherein R and R.sub.2 are hydrocarbyl groups, R.sub.1 is a hydrocarbylene group and R.sub.3 is hydrogen or a hydrocarbyl group, which groups R, R.sub.1, R.sub.2 and R.sub.3 may be substituted by or contain one or more heteroatoms or heterogroups, have utility as antioxidants for organic materials such as lubricating oils.