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Copolymers of ethylene and selected acrylate esters

a technology of acrylate esters and copolymers, which is applied in the direction of catalytic reactions, group 3/13 element organic compounds, group 5/15 element organic compounds, etc., can solve the problems of long delay between, high cost of analysis, and adjustment of manufacturing systems to minimize homopolymer formation or adjust the level of acrylate incorporation

Inactive Publication Date: 2002-03-07
EI DU PONT DE NEMOURS & CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem that sometimes occurs in these polymerizations is the formation of the desired copolymer together with some amount of a homopolymer of the acrylate ester(s) (more than one ester may be present).
While analysis of the amount of homopolymer present and also the amount of ester group present in the copolymer can be done by .sup.13C--NMR spectroscopy, such analyses are usually very time consuming, resulting in long delays between sampling and results, meaning adjustments to the manufacturing system to minimize homopolymer formation or adjust the level of acrylate incorporation may be delayed a long time, an obvious disadvantage.
This together with the high cost of the analysis itself is a drawback for making these copolymers by coordination polymerization.

Method used

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  • Copolymers of ethylene and selected acrylate esters
  • Copolymers of ethylene and selected acrylate esters
  • Copolymers of ethylene and selected acrylate esters

Examples

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Embodiment Construction

1-5

[0129] Examples 1-5 are listed in Tables 1 and 2 below. Figures for compounds 1 through 4 are shown above. The polymerizations were carried out according to General Procedure A. Varying amounts of acrylate homopolymer are present in the isolated polymers. In Table 1, the yield of the polymer is reported in grams and includes the yield of the dominant ethylene / acrylate copolymer as well as the yield of any acrylate homopolymer that was formed. Molecular weights were determined by GPC, unless indicated otherwise. Mole percent acrylate incorporation and total Me were determined by .sup.1H NMR spectroscopy, unless indicated otherwise. Mole percent acrylate incorporation is typically predominantly IC, unless indicated otherwise.

1TABLE 1 E / Acrylate Copolymerizations (6.9 MPa E, 120.degree. C., 18 h) Acrylate mL B(C.sub.6F.sub.5).sub.3 Acrylate Homo- Cmpd (Solvent (Borate Yield.sup.a Incorp. Total polymer.sup.b g Ex (mmol) mL) equiv) g mol % M.W. Me (.sup.13C NMR) 1 1 EGPEA 2 20 equiv 8...

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Abstract

In the copolymerization of ethylene and acrylate esters, the use of selected acrylate esters suppresses the formation of acrylate ester homopolymer, and / or allows the rapid analysis by 1H-NMR of the amount of homopolymer byproduct present in the copolymer, both aids in manufacturing high quality copolymers. Useful such acrylates include hexyl acrylate, 3,5,5-trimethylhexyl acrylate, 2-phenoxyethyl acrylate and 2-phenylethyl acrylate. The polymers are useful for films and molding resins.

Description

[0001] This application claims priority under 35 U.S.C. .sctn.119 from U.S. Provisional Application Ser. Nos. 60 / 208,087 (filed May 31, 2000), 60 / 211,601 (filed Jun. 15, 2000), 60 / 214,036 (filed Jun. 23, 2000) and 60 / 264,537 (filed Jan. 25, 2001), all of which are incorporated by reference herein as if fully set forth.[0002] Copolymers of ethylene and selected acrylate esters may be readily analyzed for the presence of acrylate ester homo-polymers, thereby rendering quality control during their manufacture cheaper and faster. A process for copolymer manufacture is also disclosed. The copolymers are useful for films and as molding resins.TECHNICAL BACKGROUND[0003] Recently it has become possible to prepare copolymers of olefins, especially ethylene, with acrylate esters, using late transition metal polymerization catalysts. See for instance U.S. Pat. No. 5,866,663, and S. D. Ittel, et al., Chem. Rev., vol. 100, p. 1169-1203 (2000), both of which are incorporated by reference herein f...

Claims

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Application Information

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IPC IPC(8): C07C251/08B01J31/00C07C251/20C07C251/24C07F5/06C07F7/00C07F9/50C07F9/572C07F9/58C07F15/04C07F19/00C08F4/00C08F4/06C08F4/16C08F4/44C08F4/60C08F4/605C08F4/619C08F4/642C08F4/70C08F4/76C08F4/80C08F10/00C08F10/02C08F110/02C08F118/02C08F210/00C08F210/02
CPCB01J31/1805B01J31/2282B01J2231/122B01J2531/847C07F9/46C07F9/5004C07F9/5009C07F15/0066C07F15/04C07F15/045C08F4/619C08F10/00C08F110/02C08F210/02C08F2500/04C08F2500/10C08F2500/20C08F220/10C08F2500/03C08F220/12C08F4/6028C08F4/64065C08F4/7031C08F4/7029C08F4/7019C08F4/7022C08F4/7014C08F4/7008C08F4/7006C08F4/40C08F4/00
Inventor JOHNSON, LYNDA KAYEWANG, LINMCCORD, ELIZABETH FORRESTER
Owner EI DU PONT DE NEMOURS & CO
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