Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1981-03-25
1984-07-17
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528336, C08G 6928
Patent
active
044607628
ABSTRACT:
A process is described for the preparation of high-molecular weight white polyamides, substantially consisting of units of --NH--(CH.sub.2).sub.4 --NH--CO(CH.sub.2).sub.4 --CO--, by the after-condensation of a corresponding low-molecular prepolymer, consisting substantially of a molecular chain of units of --NH--(CH.sub.2).sub.4 --NH--CO(CH.sub.2).sub.4 --CO--, in which process the prepolymer which is employed has been prepared in the presence of an excess of 0.5 to 15 moles-% of 1,4-diaminobutane with respect to the quantity stoichiometrically equivalent to the adipic acid applied. This prepolymer is thereafter subjected to the after-condensation reaction in the solid phase in an atmosphere containing water vapor.
REFERENCES:
patent: 2130948 (1938-09-01), Carothers
patent: 3676400 (1972-07-01), Kohan et al.
patent: 3840500 (1974-10-01), Ryffel et al.
Ogato, "Polycondensation", Article, Published 6/10/74, w/translation.
Journal of Polymer Science, Polymer Chemistry Edition, vol. 15, (1977), pp. 537-545, Gaymans et al.
Polymer Molecular Weights, Part I, Slade, 1975, pp. 1-4.
Bour Edmond H. J. P.
Gaymans Reinoud J.
Anderson Harold D.
Stamicarbon B.V.
LandOfFree
Preparation of high molecular polytetramethylene adipamide 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 polytetramethylene adipamide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of high molecular polytetramethylene adipamide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1492169