Polymerization process for drag reducing substances
US4433123A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 12, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | May 12, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method is provided for the production of ultrahigh molecular weight drag reducing substances and the like comprising: PA0 (a) preparing under an inert atmosphere a catalyst comprising: p1 (1) titanium halide of the general formula TiX.sub.m wherein m=2.5 to 4.0; PA1 (2) a co-catalyst of the formula AlR.sub.n X.sub.3-n where R is a hydrocarbon radical, X is a halogen or hydrogen and n is 2 or 3; PA1 (3) a phosphorous compound of the formula PR.sub.1 R.sub.2 R.sub.3 or P(OR.sub.1) (OR.sub.2) (OR.sub.3) where R.sub.1, R.sub.2, and R.sub.3 are, independently, aryl, alkyl, aralkyl, or alkaryl, containing from 1 to 12 carbon atoms and placing the catalyst in contact with; PA0 (b) alpha-monoolefinic hydrocarbons from C.sub.2 -C.sub.30 under suitable temperature conditions to provide a hydrocarbon soluble ultrahigh molecular weight polymer, then ceasing polymerization at a polymer content level of 20% by weight or less, based on the total reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.