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US 9,815,775 B1Granted
Polymeric materials made from vanillin
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsMichael E. Wright, Benjamin G. Harvey
Life of this patent
Estimating the term…
Abstract
A vanillin is found to be a useful starting material for preparing new monomers that can be further applied to make high Tg composite resins that are in turn useful for making composite parts.
Claims4
A bis(cyanate) ester monomer (A) produced by the method, comprising:
- treating vanillin with hydrogen pressure in the presence of a metal catalyst to afford 4-methyl-2-methoxyphenol;
- treating said 4-methyl-2-methoxyphenol with oxidative coupling agents that induce a coupling of the aromatic rings at the 6-position to afford 6,6-dimethyl-3,3-dimethoxy-2,2-dihydroxybiphenyl;
- treating said 6,6-dimethyl-3,3-dimethoxy-2,2-dihydroxybiphenyl with at least one cyanogen halide and base in an organic solvent to create a new biphenyl cyanate ester monomer, and
- purifying said monomer by recrystallizing or precipitating from an organic solvent.
1 more element
A bis(cyanate) ester monomer (A) produced by the method, comprising:
- treating vanillin with hydrogen Pressure ranging from 1 psig to about 6000 psig in the presence of a metal catalyst to afford 4-methyl-2-methoxyphenol, wherein said metal catalyst is selected from the group consisting of nickel, palladium, and platinum used as single metals, mixtures thereof, supported on carbon and other inorganic supports;
- treating said 4-methyl-2-methoxyphenol with oxidative coupling agents that induce a coupling of the aromatic rings at the 6-position to afford 6,6-dimethyl-3,3-dimethoxy-2,2-dihydroxybiphenyl;
- treating said 6,6-dimethyl-3,3-dimethoxy-2,2-dihydroxybiphenyl with at least one cyanogen halide and base in an organic solvent to create a new biphenyl cyanate ester monomer, wherein said cyanogen halide is selected from the group consisting of cyanogen bromide, cyanogen iodide, and cyanogen chloride;
- and
- purifying said monomer by recrystallizing or precipitating from an organic solvent.
2 more elements
A bis(cyanate) ester monomer (A) produced by the method, comprising:
- treating vanillin with hydrogen pressure in the presence of a metal catalyst to afford 4-methyl-2-methoxyphenol;
- treating said 4-methyl-2-methoxyphenol with oxidative coupling agents that induce a coupling of the aromatic rings at the 6-position to afford 6,6-dimethyl-3,3-dimethoxy-2,2-dihydroxybiphenyl, wherein said oxidative coupling agents is an oxidative enzyme of biological origin, or said oxidative coupling agents used in the chemical reaction is regenerated by electrochemical methods, or wherein said oxidative enzyme is horseradish peroxidase;
- treating said 6,6-dimethyl-3,3-dimethoxy-2,2-dihydroxybiphenyl with at least one cyanogen halide and base in an organic solvent to create a new biphenyl cyanate ester monomer;
- and
- purifying said monomer by recrystallizing or precipitating from an organic solvent.
2 more elements
A bis(cyanate) ester monomer, comprising the following structure:
Dependencies are inferred from the claim text.