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Polycarbonate composite and preparation method of same

A polycarbonate and composition technology, applied in the field of engineering plastics, can solve the problems of reducing material toughness, poor dimensional stability, affecting dimensional stability and processing fluidity, etc. The effect of functionality and practicality

Inactive Publication Date: 2016-03-23
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, fibrous fillers are mainly used for reinforcement in the system. The addition of fibrous fillers will greatly reduce the toughness of the material, and the balance of rigidity and toughness cannot be achieved. The conventional method is to increase the toughening agent, but as we all know, increasing the toughening agent will affect the size. Stability and Processing Fluidity
[0004] However, in conventional glass fiber-reinforced PC materials, glass fiber can endow the material with strong rigidity, and obtain products with ultra-high strength and modulus. Its mechanical properties and heat resistance far exceed those of glass fiber-reinforced PP. High, poor dimensional stability and difficult to meet the high requirements of the use of fans, so improving the mechanical properties of glass fiber reinforced PC can fully meet the high requirements of the use of the environment, with high warping deformation stability
[0005] So far, there is no report on the effect of polycarbonate composition with specific glass fiber length distribution and content on thermal oxygen performance, dimensional stability, strength and modulus of the material

Method used

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  • Polycarbonate composite and preparation method of same
  • Polycarbonate composite and preparation method of same
  • Polycarbonate composite and preparation method of same

Examples

Experimental program
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Effect test

Embodiment 1-9 and

[0051] Embodiment 1-9 and comparative example 1-7 follow the steps below, to prepare polycarbonate composition:

[0052] Step 1: According to the following components: polycarbonate, fibrous filler, heat stabilizer and additives;

[0053] Step 2: Dry polycarbonate, fibrous fillers and additives at a drying temperature of 120-130°C for 4-6 hours;

[0054] Step 3: Add the dried polycarbonate and additives into the high-speed mixer, and then add a heat stabilizer for mixing. The mixing temperature is 30-50°C and the mixing time is 5-15 minutes to obtain a mixture;

[0055] Step 4: Feed the mixture in step 3 into the first feeding port 1, add glass fiber to the first feeding port 1, the second feeding port 2 or the third feeding port 3, the number of glass fibers added Each example and comparative example is different. The temperature of the twin-screw extruder is controlled at 200-280°C, and at least one vacuum is installed. The vacuum can be located at the end of the feeding s...

Embodiment 1-9

[0071] The following table is the proportioning of the raw materials used in Examples 1-9, and related test results:

[0072]

[0073] In embodiment 1-9, based on the total weight of glass fibers, glass fibers accounting for 60% of the total weight of glass fibers are added from the first feeding port 1, and the time of staying in the first screw barrel 4 is 20-30s ; Based on the glass fiber gross weight, the glass fiber that accounts for 40% of the glass fiber gross weight is from the second feeding port 2, and the time to stay in the second screw barrel 5 is 8-15s; obtain embodiment 1-9 Compositions of Component I comprising specific glass fiber length distributions and weight ratios.

[0074] The polycarbonate composition that embodiment 1-9 finally obtains, according to test standard is that the density that ISO1133 records is 1.22g / cm 3 -1.80g / cm 3 ; At 300°C, the shear viscosity measured under the condition of a shear rate of 1000s-1 is 110Pa·s-350Pa·s.

[0075] In...

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Abstract

The invention discloses a polycarbonate composite which includes the following components, by weight: 50-90 parts of polycarbonate, 5-50 parts of a fiber-like filling material, 0.01-3 parts of a thermal stabilizer, 0-10 parts of an additive, wherein the total weight parts of all the components is 100. The thermal stabilizer is a mixture composed of hindered phenol thermal stabilizer and organic phosphite. The invention also provides a preparation method of the polycarbonate composite. In the polycarbonate composite, the fiber-like filling material is distributed according to special length and content, so that rigid-flexible balance is achieved and size stability is satisfied. Meanwhile, by means of the compounded thermal stabilizer added to the polycarbonate composite, the polycarbonate composite is increased in operating temperature.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a polycarbonate composition and a preparation method thereof. Background technique [0002] Polycarbonate PC is one of the five major engineering plastics. It has high impact resistance and heat resistance, and is widely used in all aspects of people's production and life. However, due to some defects of polycarbonate, such as poor processing performance, easy stress cracking, sensitive notch resistance, and poor wear resistance, it cannot meet the needs of actual use in some occasions, so people began to use glass fiber for polycarbonate. Esters are enhanced. [0003] Glass-reinforced PC materials are widely used in the fields of automobiles, electronic appliances, and home appliance materials due to their good strength, toughness, and thermal properties. At present, fibrous fillers are mainly used for reinforcement in the system. The addition of fibrous fillers w...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08K13/04C08K7/14C08K5/134C08K5/526
CPCC08K13/04C08K5/1345C08K5/526C08K7/14C08K2201/003C08K2201/014C08L2201/08
Inventor 刘贤文
Owner SHANGHAI KINGFA SCI & TECH
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