Optically anisotropic pitch

Details Optically anisotropic pitch Optically anisotropic pitch

1986-10-02

1989-01-31

Davis, Curtis R.

Mineral oils: processes and products

Products and compositions

Asphalts, tars, pitches and resins

208 39, 208 40, 208 44, 264 292, 4234474, 528247, 585 11, 585426, C10C 306, D01F 920

Patent

active

048013722

ABSTRACT:
A novel optically anisotropic pitch is provided which is produced by thermal modification of a polymer having a structure of an alkylbenzene and a condensed aromatic compound with two to four fused rings bonded to each other via a methylene group.
In preferred embodiments, the optical anisotropy is 80% or more. As the alkylbenzene there may be used xylene, trimethylbenzene or tetramethylbenzene. As the condensed aromatic compound with two to four fused rings, there may be used naphthalene, anthracene, phenanthrene, or naphthacene. The polymer starting material may be obtained by the reaction of a xylene formalin resin, mesitylene formalin resin or alkylbenzene and a condensed aromatic compound with two to four fused rings in the presence of a protonic acid as a catalyst.

REFERENCES:
patent: 3607672 (1971-09-01), Schmitt
patent: 3709863 (1973-01-01), White et al.
patent: 3718574 (1973-02-01), Traki et al.
patent: 3769249 (1973-10-01), Bilow
patent: 3784679 (1974-01-01), Chich
patent: 3928544 (1975-12-01), Yokota et al.
patent: 4020145 (1977-04-01), Soehngen et al.
patent: 4131644 (1978-12-01), Nagasaka et al.
patent: 4146576 (1979-03-01), Wyss
patent: 4152482 (1979-05-01), Reynolds et al.
patent: 4336022 (1982-06-01), Lynch et al.
patent: 4402928 (1983-09-01), Lewis et al.
patent: 4412059 (1983-10-01), Krigbaum et al.
patent: 4427530 (1984-01-01), Dickakian
patent: 4429172 (1984-01-01), Zellerhoffer et al.
patent: 4431512 (1984-02-01), Dickakian
patent: 4431623 (1984-02-01), Fug
patent: 4443324 (1984-04-01), Diefendorf et al.
patent: 4448670 (1984-05-01), Dickakian
patent: 4457828 (1984-07-01), Lewis
patent: 4548703 (1985-10-01), Dickakian
patent: 4589974 (1986-05-01), Izumi
patent: 4670129 (1987-06-01), Tate et al.

Affiliated with

Also associated with

Rating

Optically anisotropic pitch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optically anisotropic pitch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically anisotropic pitch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-176325