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C2c3 random copolymer composition

A technology of random copolymers and compositions, applied in the direction of synthetic resin layered products, chemical instruments and methods, and layered products, which can solve problems such as poor sterilization resistance and increased haze

Active Publication Date: 2020-12-25
BOREALIS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] This composition has shown a fairly good balance of SIT and hot tack, but still has poor sterilization resistance, which leads to a dramatic increase in haze after sterilization

Method used

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  • C2c3 random copolymer composition
  • C2c3 random copolymer composition
  • C2c3 random copolymer composition

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Embodiment Construction

[0037] Hereinafter, the present invention is explained in more detail.

[0038] C 2 C 3 Random Copolymer (A)

[0039] C according to the invention 2 C 3 The random copolymer composition comprises at least 70.0% by weight of C 2 C 3 Random copolymer (A).

[0040] C of the present invention 2 C 3 C used in random copolymer compositions 2 C 3 The random copolymer (A) is a random copolymer of propylene and ethylene as a comonomer.

[0041] C 2 C 3 The random copolymer (A) can be obtained in the presence of a metallocene catalyst, preferably in the presence of a metallocene catalyst.

[0042] C according to the invention 2 C 3 C used in random copolymer compositions 2 C 3 The random copolymer (A) is characterized by a moderate to low ethylene comonomer content.

[0043] Therefore, C 2 C 3The random copolymer (A) has in the range of 2.0 to 4.8 wt%, preferably in the range of 2.3 to 4.5 wt%, more preferably in the range of 2.5 to 4.2 wt%, and still more preferably...

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Abstract

New C2C3 random copolymer composition, which shows improved sealing behaviour due to low sealing initiation temperature (SIT) and high hot tack force. In addition, the inventive composition shows an excellent sterilization behaviour, i.e. retention of low haze level after sterilization. The present invention is furthermore related to the manufacture of said copolymer composition and to its use.

Description

technical field [0001] The present invention relates to a new C 2 C 3 Random copolymer compositions showing improved sealing properties due to low seal initiation temperature (SIT) and high hot tack. Furthermore, the compositions of the present invention exhibit excellent sterilization properties, ie maintain low haze levels after sterilization. Furthermore, the invention relates to the manufacture of said copolymer composition and its use. Background technique [0002] Polypropylene is suitable for many applications. [0003] For example, polypropylene (PP) can be used in areas where sealing properties play an important role, such as in the food or pharmaceutical packaging industry, especially when a good combination of transparency and mechanical properties is desired. Such a combination is difficult to achieve if the material should be suitable for the sealing layer of a multilayer film, which requires a good balance between seal initiation temperature (SIT) and therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14
CPCC08F4/65908C08F4/65912C08F210/06C08L23/142C08L2201/08C08L2201/10C08L2203/162C08L2205/025C08L2205/03C08F2420/07C08L23/0815C08K5/005C08F4/65927C08F2/001C08F4/6492C08F210/16C08F2500/12C08L23/08C08L23/14C08J5/18B32B27/32C08L2203/02C08L2203/30C08L2205/02C08L2314/06C08L23/16
Inventor 王静波马库斯·加勒蒂纳克劳斯·贝恩赖特纳泡利·莱斯吉南科奈利亚·泰宁戈
Owner BOREALIS AG
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