Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1973-08-07
1976-01-13
Anderson, Harold D.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 78S, 264184, C08G 1876
Patent
active
039323650
ABSTRACT:
A process for preparing high molecular weight aryl alkyl polymers is disclosed, wherein oxalic acid and paraphenylene diisocyanate are reacted in substantially stoichiometric amounts in a polar, aprotic anhydrous organic solvent at a temperature which is raised progressively at a rate of about 1 to about 5.degree.C per minute from a lower temperature of about 0.degree. to 30.degree. C to a higher temperature of about 80.degree. to about 150.degree.C in the presence of, at least when the viscosity of the reaction mixture exceeds 6,000 poises, a viscosity reducing amount of a hydrogen bond breaking agent, such as lithium chloride.
The resulting polymers can be formed into filaments, fibers and films, and the filaments exhibit improved tensile strengths and modulus of elasticity as compared to similar filaments of other arylalkyl polymers based on oxalic acid and other aromatic diisocyanates.
REFERENCES:
patent: 3329653 (1967-07-01), Beavers et al.
patent: 3738964 (1973-06-01), Dobinson et al.
patent: 3770704 (1973-11-01), Dobinson
Chemical Abstracts, Vol. 59, July, 1963, 1762d.
Anderson Harold D.
Rhone-Poulenc-Textile
LandOfFree
Preparation of high molecular weight polymer from oxalic acid an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preparation of high molecular weight polymer from oxalic acid an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of high molecular weight polymer from oxalic acid an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-746026