OMV has filed a patent for an ethylene-1-octene copolymer with specific characteristics. The copolymer has a density ranging from 850 kg/m3 to 930 kg/m3, a melt flow rate of 0.3 g/10 min to 100 g/10 min, and a MFR10/MFR2 ratio of 5.0 to 15.0. It also has specific unsaturation units measured by 1H NMR. The patent aims to protect this unique copolymer composition. GlobalData’s report on OMV gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on OMV, Corrosion resistant fuel additives was a key innovation area identified from patents. OMV's grant share as of September 2023 was 50%. Grant share is based on the ratio of number of grants to total number of patents.
A recently filed patent (Publication Number: US20230312789A1) describes an ethylene-1-octene copolymer with specific characteristics and a process for producing it. The copolymer has a density ranging from 850 kg/m3 to 930 kg/m3, a melt flow rate (MFR2) between 0.8 g/10 min and 100 g/10 min, and a MFR10/MFR2 ratio of 5.0 to 15.0. It also has a molecular weight distribution (Mw/Mn) of 2.0 to 5.0, determined by Gel Permeation Chromatography. The copolymer exhibits various unsaturation degrees, including vinyl unsaturation units/100,000 C atoms of 1.0 to below 20.0, vinylidene unsaturation units/100,000 C atoms of more than 5.0 to 35.0, vinylene unsaturation units/100,000 C atoms of more than 5.0 to 30.0, and trisubstituted unsaturation units/100,000 C atoms of more than 15.0 to 60.0. The total unsaturation units/100,000 C atoms, which is the sum of the different unsaturation units, ranges from 26 to 150.
The patent also includes inequations for the total unsaturation units/100,000 C atoms based on the copolymer's molecular weight (Mw) and 1-octene content. The ratio MFR10/MFR2 is specified to be between 6.0 and 13.0, and the Mw/Mn falls within the range of 2.4 to 4.0. The melt flow rate MFR2 (190° C., 2.16 kg) is between 0.8 g/10 min and 90 g/10 min. The copolymer's vinylidene unsaturation degree is in the range of 20.0 to 32.0%, while the vinyl unsaturation degree is between 7.0 and 17.0%. The 1-octene content in the copolymer is 10 to 45 wt. %.
The patent also discloses a process for producing the ethylene-1-octene copolymer. The process involves a continuous high temperature solution process at a temperature ranging from 120° C. to 250° C. and a pressure of 50 to 300 bar. The process includes polymerizing ethylene monomer and 1-octene comonomer in the presence of a polymerization catalyst and optionally a chain transfer agent. The copolymer is produced in a first polymerization reactor, followed by separation and combination with a copolymer produced in a second polymerization reactor. The polymerization catalyst used in the process includes at least one metallocene complex.
Additionally, the patent mentions the possibility of grafting the ethylene-1-octene copolymer with comonomer units containing hydrolysable silane groups to obtain a grafted copolymer with such groups. The copolymer can exhibit different unsaturation degrees, including trisubstituted unsaturation degrees ranging from 35.0 to 50.0%, vinylidene unsaturation degrees from 22.0 to 28.0%, vinylene unsaturation degrees from 14.0 to 28.0%, and trisubstituted unsaturation degrees from 36.0 to 45.5%.
In summary, the patent describes a specific ethylene-1-octene copolymer with defined characteristics and a process for its production. The copolymer exhibits specific density, melt flow rate, molecular weight distribution, and unsaturation degrees. The process involves polymerization in high temperature solution conditions using a specific catalyst. The patent also mentions the possibility of grafting the copolymer with hydrolysable silane groups.
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