Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • C08L33/04—Homopolymers or copolymers of esters
  • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
  • C08L33/10—Homopolymers or copolymers of methacrylic acid esters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
  • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
  • C08F220/10—Esters
  • C08F220/12—Esters of monohydric alcohols or phenols
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
  • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
  • C08F210/02—Ethene

Definitions

• the copolymer shows increased heat resistance as characterized by a temperature required to melt 50 % of the copolymer of at least 80 °C, a temperature required to melt 80 % of the copolymer of at least 100 °C, a temperature required to melt 100 % of the copolymer of at least 110 °C.
• the present invention provides a copolymer of ethylene and at least 5 mol % comonomer, the comonomer including a first comonomer component and a second comonomer component.
• the copolymer shows increased heat* resistance as characterized by a temperature required to melt 50 % of the copolymer of at least 40 °C, a temperature required to melt 80 % of the copolymer of at least 70 °C, and a temperature required to melt 100 % of the copolymer of at least 80 °C.
• copolymerizable chain transfer agents including propylene, isobutylene, 1-butene, etc.
• polymers made using copolymerizable chain transfer agents will usually have peak melting temperatures less than the maximum attainable for the copolymer composition and reactor conditions used.
• the tubular ethylene alkyl acrylate and alkyl methacrylate copolymers of the invention are characterized by the following properties:
• Total comonomer content from 5 mol % to 20 mol %. These mole percents represent the total moles of comonomer-derived units in the copolymer as a percentage of the total number of moles of monomer-derived and comonomer-derived units in the copolymer. Alternative lower limits of the comonomer-derived unit content can be at least 6%, at least 7%, or at least 8% (mole percents). It is a particular feature of the copolymers of the present invention that relatively large amounts of comonomer can be incorporated in the copolymer, while still maintaining the favorable properties described herein.
• the copolymers of the present invention preferably include at least 2 mol % or at least 3 mol % or at least 4 mol % of the alkyl acrylate or alkyl methacrylate comonomer, and at least 0.5 mol % or at least 1 mol %. or at least 1.5 mol % of the comonomer having a reactivity ratio r 2 relative to ethylene of 2 or less, with the total comonomer content being as described above.
• DSC Differential Scanning Calorimetry
• the difference in values determined by the two methods indicates that the more crystalline tubular reactor copolymers of the present invention have infrared absorbance characteristics which are different than the infrared absorbance characteristics of conventional autoclave-produced ethylene n-butyl acrylate copolymers.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (2)

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ID=22999976

Family Applications (1)

Country Status (8)

Cited By (4)

Families Citing this family (4)

Family Cites Families (8)

• 2002
  • 2002-01-18 JP JP2002558422A patent/JP2004527595A/ja active Pending
  • 2002-01-18 CA CA002435284A patent/CA2435284A1/en not_active Abandoned
  • 2002-01-18 CN CNA028051327A patent/CN1551892A/zh active Pending
  • 2002-01-18 AU AU2002243591A patent/AU2002243591A1/en not_active Abandoned
  • 2002-01-18 WO PCT/US2002/001471 patent/WO2002057354A2/en not_active Ceased
  • 2002-01-18 KR KR10-2003-7009597A patent/KR20030072600A/ko not_active Withdrawn
  • 2002-01-18 EP EP02709086A patent/EP1409559A4/en not_active Withdrawn
  • 2002-01-21 TW TW091100875A patent/TW593358B/zh not_active IP Right Cessation

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