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c2c3 random copolymer composition with improved balance between seal initiation temperature and melting point

A technology of random copolymer and composition, which is applied in the field of C2C3 random copolymer composition, which can solve the conflict between final performance and processing performance, and achieve the effects of good optical performance, low haze, and wide sealing window

Active Publication Date: 2018-11-27
BOREALIS AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, final properties and processability are often presented in conflicting ways

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  • c2c3 random copolymer composition with improved balance between seal initiation temperature and melting point
  • c2c3 random copolymer composition with improved balance between seal initiation temperature and melting point
  • c2c3 random copolymer composition with improved balance between seal initiation temperature and melting point

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[0232] In order to minimize possible problems associated with high activity or bleeding, it is preferred to "prepolymerize" the catalyst before using it in a polymerization process. It must be noted in this regard that prepolymerization is part of the catalyst preparation process and is a step carried out after the formation of the solid catalyst. This catalyst prepolymerization step is not part of the actual polymerization setup, which may also include conventional method prepolymerization steps. After the catalyst prepolymerization step, a solid catalyst is obtained and used for polymerization.

[0233] Catalyst "prepolymerization" occurs after the solidification step of the liquid-liquid emulsification process described above. The prepolymerization is carried out by known methods described in the prior art, for example the methods described in WO 2010 / 052263, WO 2010 / 052260 or WO 2010 / 052264. Preferred embodiments of this aspect of the invention are described herein.

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Abstract

There is an improved balance between seal initiation temperature (SIT) and melting point (Tm), ie, a C2C3 random copolymer composition with low SIT and high melting point. In addition the compositions of the present invention exhibit wide sealing windows, low hexane solubles and good optical properties such as low haze.

Description

technical field [0001] The present invention relates to the new C 2 C 3 random copolymer composition, the C 2 C 3 Random copolymer composition at sealing initiation temperature (SIT, sealing initiation temperature) and melting point (T m ) show an improved balance between exhibiting low SIT and high melting point. Furthermore, the compositions of the present invention exhibit wide sealing windows, low hexane solubles and good optical properties, such as low haze. [0002] The present invention further relates to the manufacture and use of the above composition. Background technique [0003] Polypropylene is suitable for many applications. [0004] Polypropylene (PP), for example, can be used in areas where sealing properties play an important role, for example in the food or pharmaceutical packaging industry. [0005] Heat sealing is the primary method of manufacturing flexible and semi-rigid packaging. The important characteristics of good sealing performance are es...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08F2/00C08F4/16
CPCC08F2/001C08F4/16C08L23/14C08F4/65916C08F210/06C08F4/65927C08F210/16C08F2500/12C08F2500/26C08J5/18C08L23/16C08L2314/06B29C55/28C08J2323/14C08J2423/14C08L2205/025C08L2205/03B29K2023/08B29K2023/14B29K2105/0085
Inventor 科奈利亚·泰宁戈卢吉·雷斯科尼卡尔海因茨·弗里德里希
Owner BOREALIS AG
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