This technology is available from Temarex Corporation.
Title:METHOD OF POLYMERIZING ý,w-DIYNES
Inventor(s):M. Farona, R. Srinavasan
Disclosure 100 U.S. Patent 4,877,917
A method of cyclization of ý,w-diynes with a transition metal catalyst such as niobium or tantalum salts such as halogen to yield products such as dimers, trimers, and higher polymers.
The prior art is polyarylcyclobutenes also preferably designated as "polybenzocyclobutenes" which are desirable compositions due to their high heat stability and chemical resistance.In general, these polyarylcyclobutenes are relatively expensive and their cost limits their usage, and their manufacture process requires a number of chemical operations.
This technology overcomes these disadvantages, these products are produced relatively simple by use of a very cheap catalyst and ones that are readily available with little preparation cost.
Our catalyst can dimerize, trimerize and produce polymers from the ý,w-diynes in relatively high yields at temperatures of ambient to 80¯C.These catalyst may be used without a solvent.
Because of the high heat stability and chemical resistance, this technology is ideally suitable for coatings, fibers, films and other uses.
Title:ALTERNATING COPOLYMERIZATION OF DONOR MONOMERS HAVING PROTECTED AMINE GROUPS WITH ACCEPTOR MONOMERS
Inventor(s):H.J. Harwood, R. Majumdar, S-L. Yang
Disclosure 64 U.S. Patent 4,898,915
A composition and process for making an alternating copolymerization of acceptor monomers, such as acrylic acid and derivatives thereof, and donor monomers containing free amine groups therein such as an aminostyrene compound.The free amine groups are initially protected by conversion to an imide derivative such as phthalimide or the like and then reacted with the acceptor monomers.After copolymerization, the free amine is regenerated.The alternating copolymerization reaction is usually carried out in the presence of Lewis acids which act as complexing agents. The alternating copolymers are ideally suitable as anti-static agents or as thickening agents as in oil recovery.
Title:ENHANCED OIL RECOVERY FROM WESTERN UNITED STATES TYPE OIL SHALE USING CARBON DIOXIDE RETORTING TECHNIQUE
Inventor(s):S. Lee, R. Joshi
Disclosure 56-CIP U.S. Patent 4,502,942
A retort process and product therefrom relating to the recovering of oil from Western-type U.S. shale utilizing carbon dioxide as a sweep gas.Other contributing factors with regard to increase in recovery include the heating rate, the sweep gas rate, particle size, and final temperature. The amount of increased recovery over conventional systems ranges up to about 25 percent.