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US 6,388,153 B2Granted
Alpha-methylstyrene dimer derivatives
AssigneeE. I. duPont Nemours and Company
InventorAlexei Alexeyevich Gridnev
Life of this patent
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Abstract
The present invention relates to a method of making alpha-methylstyrene dimers by combining a cobalt catalyst, a free-radical initiator and an alpha-methylstyrene monomer, in an inert atmosphere, to form a mixture. The mixture is heated to a temperature in the range of 65° C. to 140° C. to form alpha methyl styrene dimers. The present invention also relates to the products produced by this inventive method.
Claims12
A process of making alpha-methylstyrene dimer derivatives represented by the formula
- wherein R1, R2, R3, R4, R5 and R6 are each independently selected from group consisting of hydrogen, —CH(O), —CN, isocyanato, thioisocyanato, SO3H and salts and esters thereof, NR7R8, a silane, a halogen, —C(O)OR9, —C(O)NR10R11, —CR12(O), —C(O)OC(O)R13, —C(O)NR14COR15, —OC(O)R16, —OR17, substituted and unsubstituted alkyl, substituted and unsubstituted alkenyl, substituted and unsubstituted alkynyl, and substituted and unsubstituted aryl;
- R7, R8, R9, R10, R11, R12, R13, R14, R15, and R16 are each independently selected from the group consisting of H, alkyl, aryl, substituted alkyl or substituted aryl;
- R17 is selected from the group consisting of alkyl, aryl, substituted alkyl or substituted aryl;
- R1, R2, R3, R4, R5 and R6 cannot all simultaneously be hydrogen;
- and the alkyl and the substituted alkyls have a chain consisting of 1 to 12 carbons comprising the steps of:
- a) adding a cobalt chain transfer catalyst, a free-radical initiator and an alpha-methylstyrene monomer containing at least one functional group, in an inert atmosphere, to form a mixture;
- b) heating the mixture to a temperature in the range of 60° C. to 140° C.;
- and
- c) forming alpha-methylstyrene dimer derivatives containing intact functional groups and having less than 0.1% by weight of 2,4-diphenyl-4-methyl-2-pentene.
6 more elements
A new process of making alpha-methylstyrene dimer derivatives represented by the formula
- wherein R1, R2, R3, R4, R5 and R6 are each independently selected from group consisting of hydrogen, —CH(O), —CN, isocyanato, thioisocyanato, SO3H and salts and esters thereof, NR7R8, a silane, a halogen, —C(O)OR9, —C(O)NR10R11, —CR12(O), —C(O)OC(O)R13, —C(O)NR14COR15, —OC(O)R16, —OR17, substituted and unsubstituted alkyl, substituted and unsubstituted alkenyl, substituted and unsubstituted alkynyl, and substituted and unsubstituted aryl;
- R7, R8, R9, R10, R11, R12, R13, R14, R15, and R16 are each independently selected from the group consisting of H, alkyl, aryl, substituted alkyl or substituted aryl;
- R17 is selected from the group consisting of alkyl, aryl, substituted alkyl or substituted aryl;
- R1, R2, R3, R4, R5 and R6 cannot all simultaneously be hydrogen;
- and the alkyl and the substituted alkyls have a chain consisting of 1 to 12 carbons comprising the steps of:
- a) adding a cobalt chain transfer catalyst, a free-radical initiator and an alpha-methylstyrene monomer containing at least one functional group, in an inert atmosphere, to form a mixture;
- b) initiating polymerization with an external source comprising ultraviolet light, visible light, electron beam or combinations thereof;
- and
- c) forming alpha-methylstyrene dimers containing intact functional groups and having less than 0.1% by weight of 2,4-diphenyl-4-methyl-2-pentene.
6 more elements
Dependencies are inferred from the claim text.