Preparation of vinyl-containing macromers
AssigneeExxonMobile Chemical Patents Inc.
InventorEric J. Markel
Life of this patent
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Abstract
A composition of matter comprising vinyl ended copolymer chains having a number average molecular weight (Mn) of about 1500 to 75,000, the number average molecular weight being determined by gel permeation chromatography (GPC) at 145° C., a ratio of vinyl groups to total olefin groups according to the formula vinyl groups olefin groups ≥ ( comonomer mole percent + 0.1 ) a × 10 a × b ( 1 ) where a and b have the following sets of valuer: when a=−0.24, b=0.8; when a=−0.20, b=0.8; when a=−0.18, b=0.83; when a=−0.15, b=0.83; and when a=−0.10, b=0.85; and where the total number of vinyl groups per 1000 carbon atoms is in the range from greater than 0.13 to less than 9.85, the vinyl group measurement being taken by GPC (145° C.) and 1H-NMR (125° C.).
Claims18
A composition of matter comprising:
- (a) vinyl ended olefin copolymer chains having a number average molecular weight (Mn) of about 1500 to 25,154, the number average molecular weight being determined by gel permeation chromatography (GPC) at 145° C.;
- (b) a ratio of vinyl groups to total olefin groups according to the formula:
- (vinyl groups/olefin groups)≧(comonomer mole percentage+0.1)a×10a×b (1)
- where a and b have the following sets of values:
- (i) when a=−0.24, b=0.8;
- (ii) when a=−0.20, b=0.8;
- (iii) when a=−0.18, b=0.83;
- (iv) when a=−0.15, b=0.83;
- or
- (v) when a=−0.10;
- b=0.085;
- wherein
- the total number of vinyl groups per 1000 carbon atoms is greater than or equal to 8000÷Mn;
- wherein the number of vinyl groups is determined by 1H-NMR at 125° C.;
- and
- wherein Mw/Mn ranges from 2.083 to 5.666.
A composition of matter comprising:
- (a) vinyl ended olefin copolymer chains having a number average molecular weight (Mn) of about 1500 to 75,000, the number average molecular weight being determined by gel permeation chromatography (GPC) at 145° C.;
- (b) a ratio of vinyl groups to total olefin groups according to the formula:
- (vinyl groups/olefin groups)≧(comonomer mole percentage+0.1)a×10a×b (1)
- where a and b have the following sets of values:
- (i) when a=−0.24, b=0.8;
- (ii) when a=−0.20, b=0.8;
- (iii) when a=−0.18, b=0.83;
- (iv) when a=−0.15, b=0.83;
- or
- (v) when a=−0.10, b=0.85;
- wherein
- the total number of vinyl groups per 1000 carbon atoms is greater than or equal to 8000÷Mn;
- wherein the number of vinyl groups is determined by 1H-NMR at 125° C.;
- wherein Mw/Mn ranges from 2.083 to 5.666;
- and
- wherein the vinyl ended olefin copolymer chains are prepared from ethylene and at least one monomer selected from C3 to C12 α-olefins.
Dependencies are inferred from the claim text.