Unlock instant, AI-driven research and patent intelligence for your innovation.

Propylene copolymer composition with improved long-term mechanical properties

A technology of propylene copolymer and ethylene copolymerization, which is applied in the field of thin-walled plastic containers and injection molding products, and can solve the problems of reducing toughness and increasing modulus

Active Publication Date: 2020-03-27
BOREALIS AG
View PDF22 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been found that storage of polypropylene random copolymers under standard conditions (+23±1° C., 50% relative humidity) results in over 5000 hours of and increased modulus and decreased toughness over a period of 500 hours in the case of cast film (Figure 9 of the document)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Propylene copolymer composition with improved long-term mechanical properties
  • Propylene copolymer composition with improved long-term mechanical properties
  • Propylene copolymer composition with improved long-term mechanical properties

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0278] Preparation of solid catalyst components

[0279] 20.3kg of TiCl 4 and 1.1 kg of toluene were added to a 20 liter stainless steel reactor. With mixing at 350 rpm and keeping the temperature at 0° C., 14.5 kg of the magnesium alkoxide complex prepared in Example 1 were added within 1.5 hours. Add 1.7 liters of 1-254 and 7.5 kg of heptane, and after mixing for 1 hour at 0°C, the temperature of the formed emulsion was raised to 90°C within 1 hour. Mixing was stopped after 30 minutes, the catalyst droplets were allowed to solidify and the formed catalyst particles were allowed to settle. After settling (1 hour), the supernatant was siphoned off.

[0280] The catalyst particles were then washed with 45 kg of toluene at 90° C. for 20 minutes, followed by two heptane washes (30 kg, 15 min). During the first heptane wash, the temperature was lowered to 50°C, and to room temperature during the second wash.

[0281] The solid catalyst component was used together with tri...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
melt flow indexaaaaaaaaaa
melt flow indexaaaaaaaaaa
Login to View More

Abstract

Propylene-ethylene random copolymers having improved long-term mechanical properties, in particular improved retention of impact strength, their preparation and use, for example for the preparation of molded articles, especially injection molded articles, such as thin-walled articles for packaging plastic container.

Description

technical field [0001] The present invention relates to novel propylene-ethylene random copolymers having improved long-term mechanical properties, in particular improved retention of impact strength, their manufacture and their use, e.g. for the production of molded articles, especially injection molded articles, e.g. Thin-walled plastic containers for packaging. Background technique [0002] Polypropylene derives its mechanical and optical properties from the amount and nature of the crystalline phase present in the final product. In addition to designing the polymer itself, such as selection of average molecular weight, molecular weight distribution, type and relative amount of comonomers, and comonomer distribution, the crystalline phase will also be influenced by the presence of crystal nucleating agents. It is well known that different types of crystal nucleating agents will affect the crystal structure of the polymer differently, increasing the presence and relative ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/18C08K5/053C08F210/06C08F210/02C08F2/34C08F4/646
CPCC08F2/34C08F4/6465C08F210/06C08L23/142C08F2400/02C08L2205/24C08L2205/025C08L2205/02C08L2205/035C08L23/12C08L23/18C08K5/053C08F210/02C08F2500/12C08L23/10C08L23/14C08F2/001B29C45/0001B29K2995/0077C08F4/61922C08K5/0083
Inventor 朱莉安·布劳恩达维德·特兰赤达王静波马库斯·加莱特纳
Owner BOREALIS AG