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Glass fiber enhanced PC (Polycarbonate) and preparation method thereof

A glass fiber and glass fiber technology, which is used in the field of glass fiber reinforced PC and its preparation, can solve the problems of reduced medium uniformity and light transmittance, no heat resistance and modulus, and can not add too many additives, etc. Good light transmittance, high elasticity, performance-enhancing effect

Inactive Publication Date: 2018-06-19
福建华塑新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the performance of most PC products used in the field of lampshades is relatively poor. The main reason is that in order to achieve high light transmittance, the process cannot add too many additives, otherwise it will inevitably cause damage to the uniformity of the medium. The light transmission ability is reduced; but usually this kind of product does not have high heat resistance and modulus, and when used as a lampshade, most of the light sources are in a high temperature state. After using this type of lampshade for a period of time, encounter Slight impact will easily break the phenomenon

Method used

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  • Glass fiber enhanced PC (Polycarbonate) and preparation method thereof
  • Glass fiber enhanced PC (Polycarbonate) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A glass fiber reinforced PC, comprising: 78% of PC substrate, 11% of glass fiber, 6% of graphite fiber, 0.7% of high modulus additive, 1.2% of light diffusing agent, 0.2% of antioxidant, by weight percentage, The rest are compatibilizers.

[0024] Specifically, the high modulus additive is produced by pyrolyzing random copolymerized pp plastic particles.

[0025] A preparation method of glass fiber reinforced PC, comprising the following steps:

[0026] 1) Add random copolymerized pp plastic particles into a high-temperature and high-pressure reactor, and feed N 2 After emptying, heat up and crack;

[0027] 2) After the cracking is completed, the high modulus additive is prepared by degassing and cooling down;

[0028] 3) Add glass fiber, antioxidant and compatibilizer into the reaction kettle at the same time, and carry out three-stage mixing and stirring at the speed of 2000-2500r / min to obtain No. 1 material; the mixing temperature of the first stage is 122°C, th...

Embodiment 2

[0037] A kind of glass fiber reinforced PC and preparation method thereof as described in embodiment 1, can also adopt following process:

[0038] In terms of weight percentage, the raw material formula is: 83% of PC substrate, 9% of glass fiber, 3% of graphite fiber, 0.6% of high modulus additive, 1.7% of light diffusing agent, 0.3% of antioxidant, and the rest are additives. Toner.

[0039] The cracking temperature is 580° C., and the cracking time is 1.2 h.

[0040] In step 3), the mixing temperature of the first section is 117°C, and the mixing time is 5 minutes; the mixing temperature of the second section is 134°C, and the mixing time is 3 minutes; the mixing temperature of the third section is 113°C, and the mixing time is for 20min.

[0041] In step 4), the stirring time is 10-15 minutes, and then the temperature is raised to 47° C., and then stirred for 8 minutes.

[0042] In step 6), the extrusion temperatures are 180°C, 253°C, 260°C, 267°C, and 269°C in sequence....

Embodiment 3

[0044] A kind of glass fiber reinforced PC and preparation method thereof as described in embodiment 1, can also adopt following process:

[0045] In terms of weight percentage, the raw material formula is: 85% of PC substrate, 3% of glass fiber, 8% of graphite fiber, 0.5% of high modulus additive, 2% of light diffusing agent, 0.1% of antioxidant, and the rest are additives. Toner.

[0046] The cracking temperature is 540° C., and the cracking time is 2 hours.

[0047] In step 3), the mixing temperature of the first section is 130°C and the mixing time is 5 minutes; the mixing temperature of the second section is 120°C and the mixing time is 3 minutes; the mixing temperature of the third section is 120°C and the mixing time is for 20min.

[0048] In step 4), the stirring time is 10 min, and then the temperature is raised to 60° C., and then stirred for 5 min.

[0049] In step 6), the extrusion temperatures are 182°C, 212°C, 273°C, 261°C, and 278°C in sequence.

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Abstract

The invention provides a glass fiber enhanced PC (Polycarbonate) and a preparation method thereof. Glass fibers, graphite fibers, high-modulus auxiliary agents and the like are added into ingredients,and the ratio amount of each ingredient is strictly controlled. During preparation, the glass fibers, antioxygen and compatibilizer are firstly prepared into No.1 materials; the graphite fibers and light diffusant are prepared into No.2 materials; then, on the basis of the No.1 materials and the No.2 materials, the high-modulus auxiliary agents and a PC base material are added; meanwhile, technical parameters, including mixing temperature, mixing time, extrusion temperature and the like, are strictly controlled, the reaction effect and the reaction ability of the ingredients are further improved, a mixing degree is improved, an effect of synergistic interaction is achieved, and the performance of a product is greatly improved. An experiment proves that the enhanced PC prepared with the preparation method has the advantages of high strength, high modulus, high elasticity, high rigidity, heat resistance and the like and also has good light transmittance performance, and the translucidusrequirement of lampshades of each field can be met.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a glass fiber reinforced PC and a preparation method thereof. Background technique [0002] At present, the performance of most PC products used in the field of lampshades is relatively poor. The main reason is that in order to achieve high light transmittance, the process cannot add too many additives, otherwise it will inevitably cause damage to the uniformity of the medium. The light transmission ability is reduced; but usually this kind of product does not have high heat resistance and modulus, and when used as a lampshade, most of the light sources are in a high temperature state. After using this type of lampshade for a period of time, encounter Slight collisions are prone to cracking. Contents of the invention [0003] In order to overcome the above problems, the present invention provides a glass fiber reinforced PC and a preparation method thereof. [0004] To achiev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L23/14C08K13/04C08K7/14C08K7/06
CPCC08L69/00C08L2201/08C08L2205/03C08L23/14C08K13/04C08K7/14C08K7/06
Inventor 蔡鹏飞林建民
Owner 福建华塑新材料有限公司
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