US2023091635A1PendingUtilityA1

Article comprising modified tubular low density polyethylene

73
Assignee: NOURYON CHEMICALS INT BVPriority: Nov 28, 2017Filed: Nov 29, 2022Published: Mar 23, 2023
Est. expiryNov 28, 2037(~11.3 yrs left)· nominal 20-yr term from priority
Inventors:Wilhelm Klaas FrijlinkJan Martijn Van Der Schuur
C08F 110/02C08J 3/24C08J 5/18C08L 23/06C08F 2810/10C08F 2500/08C08F 2810/20C08K 5/14C09D 123/26C08J 2323/26C08F 8/00C08F 2500/12
73
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Claims

Abstract

Process for obtaining polyethylene with an MFI (190° C./2.16 kg) of at least 4 g/10 minutes and a melt strength (190° C.) of at least 8.0 cN, said process involving extrusion of low density polyethylene (LDPE) with an MFI of at least 5 g/10 minutes and a vinyl content of less than 0.25 terminal vinyl groups per 1000 C-atoms (measured with NMR in deuterated tetrachloroethane solution)—in the presence of 500-5,000 ppm, based on the weight of low density polyethylene, of an organic peroxide.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 - 15 . (canceled) 
     
     
         16 . An article comprising modified tubular low density polyethylene having:
 an MFI (190° C./2.16 kg) of at least 4 g/10 minutes;   a melt strength (190° C.) of at least 8.0 cN; and   a vinyl content of less than 0.25 terminal vinyl groups per 1000 C-atoms measured with NMR in deuterated tetrachloroethane solution.   
     
     
         17 . The article of  claim 16  wherein the MFI is from 5-100 g/10 minutes. 
     
     
         18 . The article of  claim 16  wherein the MFI is from 10-40 g/10 minutes. 
     
     
         19 . The article of  claim 16  wherein the MFI is from 4-15 g/10 minutes. 
     
     
         20 . The article of  claim 16  that is a blown film. 
     
     
         21 . The article of  claim 16  that is an extruded film. 
     
     
         22 . The article of  claim 16  that is a cast film. 
     
     
         23 . The article of  claim 16  that is a foam. 
     
     
         24 . The article of  claim 16  that is an extrusion coating. 
     
     
         25 . The article of  claim 17  that is a blown film. 
     
     
         26 . The article of  claim 17  that is an extruded film. 
     
     
         27 . The article of  claim 17  that is a cast film. 
     
     
         28 . The article of  claim 17  that is a foam. 
     
     
         29 . The article of  claim 17  that is an extrusion coating. 
     
     
         30 . The article of  claim 19  that is a blown film. 
     
     
         31 . The article of  claim 19  that is an extruded film. 
     
     
         32 . The article of  claim 19  that is a cast film. 
     
     
         33 . The article of  claim 19  that is a foam. 
     
     
         34 . The article of  claim 19  that is an extrusion coating.

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