High-toughness high-rigidity modified polypropylene material and preparation method thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A polypropylene material, high rigidity technology, applied in the field of high rigidity modified polypropylene material and high toughness, can solve the problems of inability to meet strength requirements, decreased rigidity and thermal deformation resistance, poor toughness, etc.
Inactive Publication Date: 2015-05-06
SHANGHAI PRET COMPOSITES +2
View PDF3 Cites 13 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0003] Generally speaking, for copolymerized polypropylene materials, polypropylene materials toughened and modified by elastomers can already have relatively good impact performance at room temperature, but due to the high glass transition temperature of polypropylene materials, resulting in -30 °C or even -40 °C environment shows very poor toughness, which can be improved by toughening and modifying elastomers, but blindly increasing the amount of elastomers to improve toughness results in a sharp drop in material rigidity and thermal deformation resistance. Therefore, the strength requirements of larger parts cannot be met
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0034] 83.65% of polypropylene, 10% of filler, 1.0% of heat stabilizer, 5.0% of elastomer, 0.25% of crosslinking agent, and 0.1% of co-crosslinking agent are dry blended in a high-speed mixer for 3-5 minutes, after which, Then it is melted and extruded in a twin-screw extruder and pelletized. The process is: 160-180℃ in the first zone, 200-210℃ in the second zone, 210-220℃ in the third zone, 210-220℃ in the fourth zone, and five zone 210-220℃, 205-215 in six zones, 200-210 in seven zones, pressure 12-18MPa.
Embodiment 2
[0036] Polypropylene 78.3%, filler 10%, heat stabilizer 1.0%, elastomer 10.0%, crosslinking agent 0.5%, and crosslinking aid 0.2% are dry blended in a high-speed mixer for 3-5 minutes, after which, Then it is melted and extruded in a twin-screw extruder and pelletized. The process is: 160-180℃ in the first zone, 200-210℃ in the second zone, 210-220℃ in the third zone, 210-220℃ in the fourth zone, and five zone 210-220℃, 205-215 in six zones, 200-210 in seven zones, pressure 12-18MPa.
Embodiment 3
[0038] The polypropylene 73.65%, filler 15%, heat stabilizer 0.5%, elastomer 10.0%, crosslinking agent 0.6%, and crosslinking aid 0.25% are dry blended in a high-speed mixer for 3-5 minutes, after which, Then it is melted and extruded in a twin-screw extruder and pelletized. The process is: 160-180℃ in the first zone, 200-210℃ in the second zone, 210-220℃ in the third zone, 210-220℃ in the fourth zone, and five zone 210-220℃, 205-215 in six zones, 200-210 in seven zones, pressure 12-18MPa.
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
Property
Measurement
Unit
melt flow index
aaaaa
aaaaa
particle diameter
aaaaa
aaaaa
melt flow index
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a high-toughness high-rigidity modified polypropylene material and a preparation method thereof. The high-toughness high-rigidity modified polypropylene material mainly comprises the following components in percentage by weight: 47.0%-99.8% of polypropylene, 0%-20% of talcum powder, 0.2%-1% of antioxidants, 0%-30% of elastomers, 0.1%-1.5% of cross-linking agents and 0.1%-0.5% of auxiliary cross-linking agents. By being different from a general principle of toughening polypropylene by adding the elastomers, the modified polypropylene material disclosed by the invention realizes the dynamic vulcanization in the melt blending process of the elastomers and the polypropylene by using the cross-linking agents and the auxiliary cross-linking agents on the basis that the elastomers are added to a formula which takes the polypropylene as a substrate, so the high-toughness high-rigidity modified polypropylene material is different from the characteristic that TPV appears as rubber at normal temperature. The modified polypropylene material disclosed by the invention appears as the physical property of a thermoplastic plastic at normal temperature, not only has the rigidity of a thermoplastic material, but also has high toughness, so that the high-toughness high-rigidity modified polypropylene material is obtained.
Description
Technical field [0001] The invention relates to a modified polypropylene material with high toughness and high rigidity, in particular to a modified polypropylene material with high toughness and high rigidity and a preparation method thereof. Background technique [0002] In recent years, the automotive industry has developed rapidly. As the main force of automotive interior materials, the demand for polypropylene composite materials has increased sharply. For door panels, instrument panels, trim pillars and other automotive interior parts that require high safety factors, in addition to the requirements of the parts need to have sufficient strength, it can not only carry other parts installed on the instrument panel or door panel, but also It has sufficient ability to resist deformation caused by external stress. At the same time, the parts are required to have sufficient toughness to resist the impact of external force, so that there will be no obvious cracks or sharp fragment...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more