Back to results
US 4,537,985 AGranted
Process for the manufacture of 1,4-bis[2-(4'-carbomethoxystyrenyl)] benzene
AssigneeStandard Oil Company (Indiana)
InventorsImre Puskas, Marshall Schmitt
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeStandard Oil Company (Indiana)
InventorsImre Puskas, Marshall Schmitt
Estimating the term…
A process for the manufacture of 1,4-bis[2-(4'-carbomethoxystyrenyl)] benzene is disclosed. This process comprises reacting, at a temperature of about 0.degree. C. to about 100.degree. C., in a highly polar anhydrous organic solvent or solvent mixture, or in liquid ammonia, a p-xylylene-bis-(trialkylphosphonium halide) or p-xylylene-bis-(triarylphosphonium halide) with 4-carbomethoxybenzaldehyde, initiated by the slow introduction of an organometallic compound or an inorganic base. Polyesters, such as polyethylene terephthalate, are copolymerized with about 5 to about 20 parts per million of 1,4-bis[2-(4'-carbomethoxystyrenyl)] benzene. 1,4-bis[2-(4'-carbomethoxystyrenyl)] benzene is useful to provide permanent whiteness to polyesters and polyamides and other synthetic or natural polymers. Polyesters are useful for the manufacture of fibers, films, and related industrial products.
A process for the manufacture of 1,4-bis-[2-(4'-carbomethoxystyrenyl)]benzene which comprises reacting, at a temperature of about 0.degree. C. to about 100.degree. C., in a highly polar anhydrous organic solvent or solvent mixture, or in liquid ammonia a p-xylylene-bis--(trialkylphosphonium halide) or a p-xylylene-bis--(triarylphosphonium halide) with 4-carbomethoxybenzaldehyde, initiated by the slow introduction of an organometallic base or an inorganic base.
A process for the preparation of p-xylene-bis(triphenylphosphonium chloride) wherein alpha, alpha'-dichloro-p-xylene and triphenyl phosphine are reacted in about 1:2 molar ratio without a solvent at a temperature of about 140.degree. C. to about 200.degree. C.
A process for the manufacture of 1,4-bis-[2-(4'-carbomethoxystyrenyl)]benzene which comprises reacting at a temperature of about 0.degree. C. to about 100.degree. C., in a highly polar anhydrous organic solvent or solvent mixture, p-xylene-bis-(triphenylphosphonium chloride) with 4-carbomethoxybenzaldehyde, initiated by the slow introduction of the solution of an alkali metal alkoxide.
Dependencies are inferred from the claim text.