Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1988-03-31
1990-01-09
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
525434, 528302, 25229901, 2522996, C08G 6318, C08G 6316
Patent
active
048929263
ABSTRACT:
A thermotropic liquid crystal polyester consisting essentially of ethylene glycol residue, terephthalic acid residue and parahydroxybenzoic acid residue wherein the mol ratio of ethylene glycol residue to terephthalic acid residue is substantially about 1:1 and the mol ratio of terephthalic acid residue to parahydroxybenzoic acid residue is in the range of about 5:95 to about 25:75, the polyester having an intrinsic viscosity of at least about 0.5 dl/g measured in a 50:50 by weight solvent mixture of phenol and 1,1,2,2-tetrachlorethane at 20.degree. C., and a transmittance of at least about 80% to 530 nm light at a light path length of 10 mm measured using a 0.4 wt. % solution of the polyester in said solvent mixture. A method for forming the thermotropic liquid crystal polyester is also disclosed. The liquid crystal polyester of the present invention is useful for injection molding applications and various extrusion molding purposes, such as the manufacture of films, sheets, fibers, pipes, etc.
REFERENCES:
patent: 3778410 (1973-12-01), Kuhfuss et al.
Jackson, W. J. et al, J. Polymer Sci., 14:2043-2058 (1976).
Patent Abstracts of Japan, vol. 11, No. 290 (1987).
Patent Abstracts of Japan, vol. 7, No. 181 (1983).
Patent Abstracts of Japan, vol. 10, No. 36 (1986).
Naito Hisayuki
Sasaki Singo
Suenaga Jun-ichi
Bleutge John C.
Carrillo A.
Unitika Ltd.
LandOfFree
Thermotropic liquid crystal polyesters and a method for their pr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermotropic liquid crystal polyesters and a method for their pr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermotropic liquid crystal polyesters and a method for their pr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-145952