Halogen-free flame-retardant reinforced polypropylene and preparation method thereof
What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
A polypropylene and flame retardant technology, which is applied in the field of halogen-free flame retardant reinforced polypropylene and its preparation, can solve the problems of reducing the flame retardant performance and electrical insulation properties of materials, reducing electrical insulation properties, and material breakdown, and achieves the promotion of Effects of adhesion deposition, improvement of electrical insulation, and improvement of flame retardancy
Active Publication Date: 2020-04-07
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG +1
View PDF10 Cites 0 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
[0004] Although the vast majority of polymers themselves have high electrical insulation properties, when used as engineering materials, glass fibers, carbon black, flame retardants, toughening agents and other related properties and processing aids need to be added, so that lead to reduced electrical insulation performance
Especially the reinforced resin with glass fiber, due to the "candle wick effect" of glass fiber and the poor interface between inorganic glass fiber and organic matrix, will seriously reduce the flame retardancy and electrical insulation of the material while strengthening.
At present, the general-purpose brominated flame-retardant reinforced polypropylene resin commonly used in electronic and electrical parts, the CTI value of white products generally does not exceed 250V, and the black product generally does not exceed 200V. When the electronic and electrical device circuit is accidentally discharged, material breakdown may occur , thermal decomposition, electrical corrosion, and even ignition and other damage phenomena
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
[0018] Polypropylene, glass fiber, triphenyl phosphate and hybrid (Rd-Si) are mixed according to the proportion of 54.5%, 15%, 30% and 0.5% by weight, and added to the Haake torque rheometer, At 160°C and 50 rpm, blend for 3 minutes to obtain Example 1, and its performance indicators are shown in the following table:
[0019] Table 1 Comparison table of performance parameters between Example 1 and commercially available halogen-based reinforced flame-retardant polypropylene products
[0020]
Embodiment 2
[0022] Mix polypropylene, glass fiber, melamine polyphosphate and hybrid (Rd-Si) according to the ratio of 64.8%, 10%, 25% and 0.2% by weight, and add them to the Huck torque rheometer , at 180°C, under 80rpm, blending for 5min to obtain Example 2, its performance indicators are shown in the table below:
[0023] Table 2 Comparison table of performance parameters between Example 2 and commercially available halogen-based reinforced flame-retardant polypropylene products
[0024]
Embodiment 3
[0026] Polypropylene, glass fiber, encapsulated coated red phosphorus and hybrid (Rd-Si) were mixed according to the ratio of 61.7%, 12%, 26% and 0.3% by weight, and added to the Huck torque rheometer In 170 DEG C, under 60rpm, blending 3min, promptly obtains embodiment 3, and its performance index is shown in the following table:
[0027] Table 3 Comparison table of performance parameters between Example 3 and commercially available halogen-based reinforced flame-retardant polypropylene products
[0028]
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
length
aaaaa
aaaaa
Login to View More
Abstract
The invention discloses a halogen-free flame-retardant reinforced polypropylene with high electric leakage resistance. The polypropylene comprises 54.5-64.8 wt% of polypropylene, 10-15 wt% of a glassfiber, 25-30 wt% of a flame retardant and 0.2-0.5 wt% of a synergistic agent. The invention also discloses a preparation method of the halogen-free flame-retardant reinforced polypropylene with high electric leakage resistance. The problem that high flame retardance, high electrical insulation and high strength of a polypropylene flame-retardant material are difficult to meet at the same time is solved, and the excellent flame retardance and electrical performance of the polypropylene flame-retardant material make the halogen-free flame-retardant reinforced polypropylene replace ABS resin, PC/ABS alloy and the like to be used for producing electronic and electrical products such as sockets, angular connectors, binding posts, electrical appliance panels and wiring boards.
Description
technical field [0001] The invention relates to the technical field of polymer materials, in particular to a halogen-free flame-retardant reinforced polypropylene and a preparation method thereof. Background technique [0002] When the plastic part is turned on and off, an electric field will be formed locally. The inhomogeneity of this electric field will cause flashover discharge and heat generation. Under the joint action of electric field and heat, the surface of the insulating material is carbonized, and the resistance of the carbide is small, which leads to an increase in the electric field strength formed by the tip of the applied voltage electrode, so that flashover discharge is more likely to occur. Such a vicious circle until it causes surface insulation damage, forms a conductive channel, produces tracking and damages the electrical insulation performance of the material. [0003] The comparative tracking index (CTI value) is an index to measure the tracking sens...
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