High propylene content EP having low glass transition temperatures
AssigneeExxonMobil Engineering & Technology Company
InventorsZhifeng Bai, Jo Ann M. Canich, Jingwen Zhang, Peijun Jiang, Adrian Garcia Barry, Chase A. Eckert, Sarah J. Mattler
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Abstract
The present disclosure provides methods for producing an olefin polymer by contacting a C3-C40 olefin and ethylene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted tetrahydro-s-indacenyl group and obtaining a C3-C40 olefin-ethylene copolymer typically comprising from 0.5 to 43 wt % ethylene, and from 99.5 to 57 wt % C3 to C40 comonomer wherein the Tg of the terpolymer is from 0 to −60° C.
Claims24
A method for producing a C3-C40 olefin-ethylene copolymer comprising:
- contacting a C3-C40 olefin and ethylene with a catalyst system comprising an activator and a catalyst compound represented by formula (I):
- TyCp′mMGnXq (I)
- wherein:
- Cp′ is a tetrahydroindacenyl group, wherein the tetrahydroindacenyl group tetrahydro-s-indacenyl or tetrahydro-as-indacenyl, and wherein the tetrahydroindacenyl group is optionally substituted or unsubstituted, provided that when Cp′ is tetrahydro-s-indacenyl:
- 1) the 3 and/or 4 positions are not aryl or substituted aryl, 2) the 3 position is not directly bonded to a group 15 or 16 heteroatom, 3) there are no additional rings fused to the tetrahydroindacenyl ligand, 4) T is not bonded to the 2-position, and 5) the 5, 6, or 7-position is geminally disubstituted;
- M is a group 3, 4, 5, or 6 transition metal;
- T is a bridging group;
- y is 0 or 1, indicating the absence or presence of T;
- G is a heteroatom group represented by the formula JRiz-y where J is N, P, O or S,
- Ri is a C1 to C100 hydrocarbyl group, and z is 2 when J is N or P, and z is 1 when J is O or S;
- X is a leaving group;
- m=1;
- n=1, 2 or 3;
- q=1, 2 or 3;
- and the sum of m+n+q is equal to the oxidation state of the transition metal;
- and
- obtaining the a C3-C40 olefin-ethylene copolymer comprising from 0.5 to 43 wt % of ethylene, and from 99.5 to 57 wt % C3-C40 olefin, and wherein the copolymer has a Tg (° C.) is from 0 to −60° C.
A polymer comprising:
- from 0.5 to 43 wt % of ethylene and from 99.5 to 57 wt % C3-C40 olefin, and
- wherein the polymer has a Tg (° C.) is from 0 to −60° C.;
- optionally, wherein the polymer has an average CH2 sequence length for 6+carbons as measured by 13C NMR of less than 10, or less than 9.5, or 9 or lower, with a lower limit of 4 or greater, or 5 or greater, or 6 or greater;
- and
- wherein the polymer has:
- 1) a melt flow rate at 230° C. from 0.2 g/10 min to 2000 g/10 min at 2.16 kg;
- 2) a number average molecular weight value of from 10,000 g/mol to 500,000 g/mol;
- 3) a weight average molecular weight value of from 20,000 g/mol to 1,000,000 g/mol;
- 4) a z-average molecular weight value of from 50,000 g/mol to 2,000,000 g/mol;
- 5) an Mw/Mn of from 1.5 to 3.5;
- 6) a crystallinity of from 0% to 3%;
- 7) the Tg (° C.) of the polymer is greater than or equal to −8.4295-1.2019*E and less than or equal to 0.5705-1.2019*E, wherein E is a weight fraction of ethylene in the polymer measured by FTIR.
Dependencies are inferred from the claim text.