US2021171678A1PendingUtilityA1

Microstructure-controlled copolymers of ethylene and c3-c10 alpha-olefins

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Assignee: AFTON CHEMICAL CORPPriority: Dec 13, 2016Filed: Jun 12, 2018Published: Jun 10, 2021
Est. expiryDec 13, 2036(~10.4 yrs left)· nominal 20-yr term from priority
Inventors:Nathaniel CainJohn T. LoperLawrence J. CunninghamJoseph W. Roos
C08F 10/06C08K 3/38C08F 2800/10C08F 210/00C08F 210/16C08F 2500/02C08F 2500/03C08F 4/65912C08K 2003/2227C08F 10/02B01J 2231/20C08L 23/0815C08K 2003/2244C08K 3/22C08F 4/65925C08F 2500/06C08F 4/65908C08F 210/06C08F 110/00
68
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Claims

Abstract

A copolymer including ethylene units and units of one or more C3-10 alpha-olefins. The copolymer has a number average molecular weight of less than 5,000 g/mol, as measured by GPC. The ethylene unit content of the copolymer is less than 80 mol %. 70 mol % or greater of the copolymer has a carbon-carbon double bond in a terminal monomer unit, and at least 70 mol % of the terminal unsaturation is vinylidene, one or more tri-substituted isomers of the vinylidene or any combination thereof. The copolymer has a crossover temperature of −20° C. or lower and/or a certain average ethylene run length. Also disclosed are a method for making the copolymer and polyolefins plasticized with 1-40 wt. % of the copolymer. The copolymers may low metal (ash) and/or fluorine contents.

Claims

exact text as granted — not AI-modified
1 . A copolymer comprising ethylene units and units of one or more C 3-10  alpha-olefins,
 wherein the copolymer has a number average molecular weight of less than 5,000 g/mol as measured by GPC using polystyrene as a calibration reference;   wherein an ethylene unit content of the copolymer is less than 80 mol %, as measured by  1 H-NMR spectroscopy;   wherein the copolymer has a terminal unsaturation of 70 mol % or greater, as measured by  13 C-NMR spectroscopy, and at least 70 mol % of the terminal unsaturation is terminal vinylidene, one or more tri-substituted isomers of the terminal vinylidene and any combination thereof, as measured by  1 H-NMR spectroscopy;   wherein the copolymer has an average ethylene run length (   C2,Actual ) which is less than 2.8, as determined by  13 C NMR spectroscopy,   and wherein:
       C2,Actual <   C2,Statistical . 
   
     
     
         2 . The copolymer of  claim 1 , wherein the copolymer has a crossover temperature of −20° C. or lower. 
     
     
         3 . The copolymer of  claim 1 , wherein the copolymer has an average ethylene run length of less than 2.6. 
     
     
         4 . The copolymer of  claim 1 , the ethylene unit content of the copolymer is less than 70 mol %. 
     
     
         5 . The copolymer of  claim 1 , wherein the ethylene unit content of the copolymer is less than 55 mol %. 
     
     
         6 . The copolymer of  claim 1 , wherein the ethylene unit content of the copolymer is at least 10 mol % and less than 70 mol %. 
     
     
         7 . The copolymer of  claim 1 , wherein the ethylene unit content of the copolymer is at least 40 mol % and less than 60 mol %. 
     
     
         8 . The copolymer of  claim 1 , wherein the C 3 -C 10  alpha-olefin unit content of the copolymer is at least 40 mol %. 
     
     
         9 . The copolymer of  claim 1 , wherein at least 85 mol % of the terminal unsaturation is the terminal vinylidene, one or more of the tri-substituted isomers of the terminal vinylidene or any combination thereof. 
     
     
         10 . The copolymer of  claim 1 , wherein the copolymer has an average ethylene run length of less than 2.4. 
     
     
         11 . The copolymer of  claim 1 , wherein the copolymer has an average ethylene run length of less than 2. 
     
     
         12 . The copolymer of  claim 1 , wherein the crossover temperature of the copolymer is −30° C. or lower. 
     
     
         13 . The copolymer of  claim 1 , wherein the crossover temperature of the copolymer is −40° C. or lower. 
     
     
         14 . The copolymer of  claim 1 , wherein the copolymer has a polydispersity index of less than or equal to 4. 
     
     
         15 . The copolymer of  claim 1 , wherein the copolymer has a polydispersity index of less than or equal to 3. 
     
     
         16 . The copolymer of  claim 1 , wherein the C 3 -C 10  alpha-olefin units comprise propylene units. 
     
     
         17 . The copolymer of  claim 1 , wherein the number average molecular weight of the copolymer is greater than 500 and less than 4,000 g/mol, as measured by GPC. 
     
     
         18 . The copolymer of  claim 1 , wherein less than 20% of unit triads in the copolymer are ethylene-ethylene-ethylene triads. 
     
     
         19 . The copolymer of  claim 1 , wherein the copolymer is an ethylene-propylene copolymer and has a number average molecular weight less than 3,500 g/mol, as measured by GPC. 
     
     
         20 . The copolymer of  claim 19 , wherein the ethylene unit content of the copolymer is at least 10 mol % and less than 70 mol %. 
     
     
         21 . The copolymer of  claim 20 , wherein the copolymer has a polydispersity index of less than or equal to 4. 
     
     
         22 . The copolymer of  claim 21 , wherein the crossover temperature of the copolymer is −20° C. or lower. 
     
     
         23 . The copolymer of  claim 22 , wherein less than 20% of unit triads in the copolymer are ethylene-ethylene-ethylene triads. 
     
     
         24 . The copolymer of  claim 23 , wherein the copolymer has a number average molecular weight less than 2,500 g/mol, as measured by GPC. 
     
     
         25 . The copolymer of  claim 24 , wherein the ethylene unit content of the copolymer is at least 40 mol % and less than 60 mol %. 
     
     
         26 . The copolymer of  claim 1 , wherein the terminal vinylidene and the tri-substituted isomers of the terminal vinylidene of the copolymer have one or more of the following structural formulas (I)-(II): 
       
         
           
           
               
               
           
         
       
       wherein R represents a C 1 -C 8  alkyl group and “ 
       
         
           
           
               
               
           
         
       
       ” indicates the bond is attached to the remaining portion of the copolymer. 
     
     
         27 . The copolymer of  claim 1 , wherein the copolymer has a total Zr, Ti, Al, and B content of 25 ppmw or less, based on the total weight of the copolymer, wherein the Zr, Ti, Al, and B is derived from a single-site catalyst and an optional co-catalyst. 
     
     
         28 . The copolymer of  claim 1 , wherein the copolymer has a total Zr, Ti, Al, and B content of 10 ppmw or less, based on the total weight of the copolymer, wherein the Zr, Ti, Al, and B is derived from a single-site catalyst and an optional co-catalyst. 
     
     
         29 . The copolymer of  claim 1 , wherein the copolymer has a fluorine content of less than 10 ppmw, based on the total weight of the copolymer. 
     
     
         30 . (canceled)

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