CN115785645B - Masterbatch for preparing electronic product shell and preparation method and application thereof - Google Patents
Masterbatch for preparing electronic product shell and preparation method and application thereof Download PDFInfo
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- 239000004594 Masterbatch (MB) Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- 239000010445 mica Substances 0.000 claims abstract description 75
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 75
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 55
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 38
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 150000001875 compounds Chemical class 0.000 claims abstract description 24
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 9
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 238000013329 compounding Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 33
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000000967 suction filtration Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical group [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 3
- 238000000643 oven drying Methods 0.000 claims description 3
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 17
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 238000005452 bending Methods 0.000 description 12
- 238000005286 illumination Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000155 melt Substances 0.000 description 8
- 238000004383 yellowing Methods 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 239000003063 flame retardant Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application relates to the technical field of electronic product materials, and particularly discloses a master batch for preparing an electronic product shell, and a preparation method and application thereof. The master batch for preparing the electronic product shell comprises the following raw materials in parts by weight: 90-100 parts of PC resin, 1-5 parts of MBS copolymer, 0.1-0.5 part of anti-dripping agent, 0.1-0.5 part of fireproof agent, 0.1-0.5 part of PETS, 0.3-0.9 part of anti-aging agent, 0.3-0.8 part of weather-proof agent and 5-12 parts of anti-aging material; wherein the anti-aging material is prepared by compounding a mica compound and PC slices; the preparation method comprises the following steps: and melting, extruding, granulating and cooling the raw materials to obtain the master batch for preparing the shell of the electronic product. The master batch for preparing the electronic product shell has the advantage of improving the ageing resistance of the electronic product shell through the synergistic effect of the raw materials.
Description
Technical Field
The application relates to the technical field of electronic product materials, in particular to a master batch for preparing an electronic product shell, and a preparation method and application thereof.
Background
With the development of science and technology, people's life is more and more convenient, especially in the aspect of office, so that various convenient office supplies appear, such as computers, faxes, telephones, printers and the like, and staff can handle various things in the office, so that the time that the staff contacts with the office supplies is longer and longer, and further, the safety of electronic products is more and more important to people.
At present, the shells of many electronic products are made of plastic materials, and the plastic materials have the advantages of light weight, no rust, good insulativity and the like, and are easy to process, good in processing dimensional stability, good in surface glossiness and easy to coat and color, but the shells of the electronic products are intolerant to ultraviolet light, easy to age and cause cracks along with long-time use of the electronic products, so that the service life is reduced.
Disclosure of Invention
In order to improve the ageing resistance of the shell of the electronic product, the application provides a master batch for preparing the shell of the electronic product, and a preparation method and application thereof.
In a first aspect, the present application provides a masterbatch for preparing an electronic product shell, which adopts the following technical scheme:
The master batch for preparing the electronic product shell comprises the following raw materials in parts by weight: 90-100 parts of PC resin, 1-5 parts of MBS copolymer, 0.1-0.5 part of anti-dripping agent, 0.1-0.5 part of fireproof agent, 0.1-0.5 part of PETS, 0.3-0.9 part of anti-aging agent, 0.3-0.8 part of weather-proof agent and 5-12 parts of anti-aging material; wherein the anti-aging material is prepared by compounding mica compound and PC slice.
By adopting the technical scheme, the master batch for preparing the electronic product shell disclosed by the application not only maintains good mechanical properties of the electronic product shell, but also improves the ageing resistance of the electronic product shell through the synergistic effect of the raw materials, wherein the melt index of the electronic product shell is 16-33g/10min, the tensile strength is 66-89MPa, the elongation at break is 138-164%, the bending strength is 66-86MPa, the bending modulus is 2450-2588N/m 2, the flame retardance is V0, the yellowing is avoided, and the yellowness index after illumination for 200 hours is 4.95-5.72.
The PC resin is the basic component of the electronic product shell, and the MBS copolymer is added into the raw material of the electronic product shell, so that the functions of toughening and improving the strength can be achieved; the anti-dripping agent can play a role in anti-dripping; the fire retardant can play a role in preventing fire and retarding flame; the anti-aging agent can enhance the anti-aging effect of the electronic product shell; the weather-resistant agent can improve the weather resistance of the shell of the electronic product.
The anti-aging material is compounded by a mica compound and PC slices, wherein the mica compound contains mica, the mica is a layered aluminosilicate mineral, the chemical property is relatively stable, the mica has good acid resistance, alkali resistance, high temperature resistance, insulation resistance and dimensional stability, and the mica is a layered structure formed by overlapping a plurality of thin layers, and the layered structure can enable light rays entering the mica to generate multiple reflection and refraction between the layers, so that the mica has an anti-ultraviolet effect, an anti-aging effect is achieved, and the anti-aging performance of an electronic product shell is improved.
As preferable: the mica compound is prepared by the following method: pulverizing mica, sieving, adding into water, mixing, heating, maintaining temperature, adjusting pH, adding anhydrous alcohol solution of titanium tetrachloride, standing, reacting, cooling, centrifuging, taking out solid, washing, oven drying, and calcining to obtain mica compound.
Further, the mica composite is prepared by the following method: pulverizing mica, sieving, adding into water, mixing, heating to 40-60deg.C, maintaining the temperature for 1-2 hr, adjusting pH to 7 with hydrochloric acid solution, adding titanium tetrachloride anhydrous ethanol solution, standing for 30-50min, reacting for 1-2 hr, cooling, centrifuging, taking out solid, washing with water for 3-5 times, oven drying, and calcining to obtain mica compound;
Wherein, the adding amount of water in each 1g of mica is 4-6mL, and the mass fraction of the hydrochloric acid solution is 20%; the mass fraction of titanium tetrachloride in the titanium tetrachloride absolute ethanol solution is 70%.
By adopting the technical scheme, the mica compound is prepared by using the preparation method, the mica has an adsorption effect, titanium oxide can be loaded, the titanium oxide has strong ultraviolet absorption and scattering capability, the mica has excellent ultraviolet shielding performance, and the ageing resistance of the electronic product shell is further improved through the synergistic effect between the mica and the titanium oxide.
As preferable: the weight ratio of the mica to the titanium tetrachloride absolute ethyl alcohol solution is 1: (1.5-2).
The addition amount of the absolute ethanol solution of titanium tetrachloride is too small to react with mica better, so that the better anti-aging effect is not achieved; the excessive addition of the absolute ethanol solution of titanium tetrachloride can cause waste when the reaction reaches saturation. By adopting the technical scheme, when the proportion of the two is in the range, the two can fully react, and the ageing resistance is further improved.
As preferable: the anti-aging material is prepared by the following method: and uniformly mixing the mica compound and the PC slice, carrying out melt blending, extruding, granulating and cooling to obtain the anti-aging material.
Further, the anti-aging material is prepared by the following method: mixing mica compound and PC slice uniformly, melting at 230-240 deg.C, extruding, granulating, cooling and obtaining the invented anti-aging material.
By adopting the technical scheme, the anti-aging material is prepared by using the preparation method, so that the mica compound and the PC slice are more uniformly mixed, and the raw materials can better play a role, thereby further improving the ageing resistance of the electronic product shell.
As preferable: the weight ratio of the mica compound to the PC slice is 1: (15-25).
The addition amount of the mica compound is too small, so that the mica compound cannot play a better anti-aging role; the added amount of the mica compound is too large, so that the anti-aging effect is not enhanced, and the waste of raw materials is caused. By adopting the technical scheme, when the mixing amount of the mica compound and the PC slice is in the range, the mica compound and the PC slice can play a better anti-aging role.
As preferable: the mica is pretreated by the following method when in use: and (3) placing the mica into a sodium hydroxide solution, heating, raising the temperature, carrying out suction filtration, washing, then placing into a hydrochloric acid solution for soaking, carrying out suction filtration, washing and drying to obtain the pretreated mica.
Further, the mica is pretreated in use by the following method: placing mica into sodium hydroxide solution, heating to 40-50 ℃, carrying out suction filtration, washing with water for 3-5 times, then placing into hydrochloric acid solution for soaking for 30-40min, carrying out suction filtration, washing with water for 3-5 times, and drying to obtain pretreated mica;
wherein, the adding amount of the sodium hydroxide solution in each 1g of mica is 4-6mL, the mass fraction of the sodium hydroxide solution is 20%, the adding amount of the hydrochloric acid solution in each 1g of mica is 4-6mL, and the mass fraction of the hydrochloric acid solution is 20%.
By adopting the technical scheme, the mica is subjected to alkali washing and acid washing, other impurities on the mica can be removed, and the loading capacity of the mica is improved, so that the ageing resistance of the electronic product shell is improved.
As preferable: the fire retardant is one or more of magnesium hydroxide, aluminum hydroxide and antimony trioxide.
As preferable: the anti-aging agent is one or more of ultraviolet absorber, hindered amine light stabilizer and antioxidant.
By adopting the technical scheme, the fire retardant and the anti-aging agent are limited, so that the fire resistance and the aging resistance of the electronic product shell are improved conveniently.
In a second aspect, the present application provides a method for preparing a master batch for preparing an electronic product shell, which adopts the following technical scheme:
a preparation method of master batch for preparing electronic product shells comprises the following steps:
S1: uniformly mixing PC resin, MBS copolymer, anti-dripping agent, fireproof agent, PETS, anti-aging agent, weather-proof agent and anti-aging material to obtain a mixture;
S2: and melting, extruding, granulating and cooling the mixture to obtain the master batch for preparing the shell of the electronic product.
Further, a preparation method of the master batch for preparing the shell of the electronic product comprises the following steps:
S1: uniformly mixing PC resin, MBS copolymer, anti-dripping agent, fireproof agent, PETS, anti-aging agent, weather-proof agent and anti-aging material to obtain a mixture;
S2: melting the mixture at 230-240 ℃, extruding, granulating, and cooling to obtain master batch for preparing electronic product shells.
By adopting the technical scheme, the master batch is prepared by using the preparation method, so that the raw materials are convenient to uniformly mix and better play a role, and the ageing resistance of the electronic product shell is improved.
In a third aspect, the present application provides an application of a master batch for preparing an electronic product shell, which adopts the following technical scheme:
An application of master batch for preparing an electronic product shell, comprising the following steps: and melting, injection molding, cooling and molding the master batch to obtain the electronic product shell.
Further, an application of the master batch for preparing the shell of the electronic product comprises the following steps: and melting the master batch at 240-250 ℃, performing injection molding, cooling and molding to obtain the electronic product shell.
In summary, the present application includes at least one of the following beneficial technical effects:
1. The mica composite and the PC slice are adopted to prepare the anti-aging material, so that the mica composite has a better anti-ultraviolet function, and can play an anti-aging role, thereby improving the anti-aging role of the shell of the electronic product, enabling the melt index of the shell of the electronic product to reach 33g/10min, the tensile strength to reach 89MPa, the elongation at break to reach 164%, the bending strength to reach 86MPa, the bending modulus to reach 2588N/m 2, the flame retardance to reach V0, no yellowing, and the yellowness index after 200h illumination to be reduced to 4.95.
2. In the application, the mica is preferably pretreated, and alkali washing and acid washing are carried out on the mica, so that impurities on the surface of the mica are conveniently removed, and the loading property of the mica is improved, thereby improving the ageing resistance of the ageing-resistant material and the ageing resistance of the electronic product shell.
Detailed Description
The present application will be described in further detail with reference to the following specific details.
Raw materials
The MBS copolymer has a molecular weight of 300000; the anti-dripping agent is K-PT200; the fire retardant is aluminum hydroxide; the anti-aging agent is an ultraviolet absorber, namely UV-71; the weather-proof agent is YR-8122.
Preparation example
Preparation example 1
A mica composite prepared by the following method:
Pulverizing 2kg of mica, sieving, putting into 10L of water, uniformly mixing, heating to 50 ℃, preserving heat for 1.5h, regulating the pH value to 7 by using a hydrochloric acid solution with the mass fraction of 20%, then adding 3kg of titanium tetrachloride absolute ethanol solution, standing for 40min, reacting for 1.5h, cooling, centrifuging, taking out a solid, washing with water for 5 times, drying and roasting to obtain the mica compound.
Preparation example 2
A mica composite was different from that of preparation example 1 in the addition amount of the titanium tetrachloride absolute ethanol solution, and in preparation example 2, the addition amount of the titanium tetrachloride absolute ethanol solution was 3.5kg.
Preparation example 3
A mica composite was different from that of preparation example 1 in that the addition amount of the titanium tetrachloride absolute ethanol solution was different, and the addition amount of the titanium tetrachloride absolute ethanol solution in preparation example 3 was 4kg.
Preparation example 4
An anti-aging material is prepared by the following method:
2kg of the mica compound prepared in preparation example 2 and 30kgPC slices were uniformly mixed, melted at 235 ℃, extruded, granulated and cooled to obtain an anti-aging material.
Preparation example 5
An anti-aging material was different from that of preparation example 4 in that the addition amount of PC chips was different, and the addition amount of PC chips in preparation example 5 was 40kg.
Preparation example 6
An anti-aging material was different from that of preparation example 4 in that the addition amount of PC chips was different, and the addition amount of PC chips in preparation example 6 was 50kg.
Examples
Example 1
The master batch for preparing the shell of the electronic product has the raw material proportion shown in table 1.
A preparation method of master batch for preparing electronic product shells comprises the following steps:
S1: mixing PC resin, MBS copolymer, anti-dripping agent, fire retardant, PETS, anti-aging agent, weather resistant agent and anti-aging material prepared in preparation example 4 uniformly to obtain a mixture;
S2: and (3) melting the mixture at 235 ℃, extruding, granulating, and cooling to obtain master batches for preparing the shell of the electronic product.
Examples 2 to 3
A master batch for preparing an electronic product shell is different from example 1 in that the master batch has different raw material ratios, and the raw material ratios are shown in Table 1.
TABLE 1 raw materials of masterbatch in different examples
Examples 4 to 5
A master batch for preparing an electronic product housing is different from example 3 in that the master batch has different raw material ratios, and the raw material ratios are shown in Table 2.
TABLE 2 raw materials of masterbatch in different examples
| Raw materials | Example 4 | Example 5 |
| PC resin | 95 | 100 |
| MBS copolymers | 3 | 5 |
| Anti-dripping agent | 0.3 | 0.5 |
| Fire-retardant agent | 0.3 | 0.5 |
| PETS | 0.3 | 0.5 |
| Anti-aging agent | 0.6 | 0.9 |
| Weather-proof agent | 0.5 | 0.8 |
| Anti-aging material | 12 | 12 |
Example 6
A master batch for preparing an electronic product housing is different from example 4 in that the source of anti-aging material in the master batch raw material is different, and is prepared by adopting a preparation example 5.
Example 7
A master batch for preparing an electronic product housing is different from example 4 in that the source of anti-aging material in the master batch raw material is different, and is prepared by adopting preparation example 6.
Example 8
A masterbatch for preparing an electronic product housing, which differs from example 6 in that mica in an anti-aging material in the masterbatch is pretreated prior to use by: placing mica in a sodium hydroxide solution with the mass fraction of 20%, heating to 45 ℃, carrying out suction filtration, washing with water for 5 times, then placing the mica in a hydrochloric acid solution with the mass fraction of 20% for soaking for 35min, carrying out suction filtration, washing with water for 5 times, and drying to obtain pretreated mica; wherein the addition amount of the sodium hydroxide solution per 1g of mica is 5mL, and the addition amount of the hydrochloric acid solution per 1g of mica is 5mL.
Comparative example
Comparative example 1
A master batch for preparing an electronic product housing is different from example 1 in that no anti-aging material is added to the raw material of the master batch.
Comparative example 2
A masterbatch for use in preparing an electronic product housing, which differs from example 1 in that the mica complex in the anti-aging material in the masterbatch raw material is replaced with mica in equal amounts.
Application example
Application example 1
An electronic product housing comprising the steps of: and (3) melting the master batch prepared in the embodiment 1 at the temperature of 240-250 ℃, performing injection molding, cooling and molding to obtain the electronic product shell.
Application examples 2 to 8
An electronic product housing is different from application example 1 in that master batches are prepared by adopting examples 2-8.
Comparative examples 1 to 2 were used
An electronic product housing is different from application example 1 in that master batches are prepared by adopting comparative examples 1-2.
Performance test
The following performance tests were performed on the electronic product housings in application examples 1 to 8 and application comparative examples 1 to 2:
Melt index: the melt index of the electronic product housing was measured according to GB/T3682-2000 melt mass flow rate, and the test results are shown in Table 3.
Tensile strength and elongation at break: determination of tensile Properties of plastics according to GB/T1040.1-2006 section 1: the general rule was used for measuring the tensile strength and elongation at break of the electronic product case, and the measurement results are shown in table 3.
Flexural strength, flexural modulus: the flexural strength and flexural modulus of the electronic product housing were measured according to GB/T9341-2000 test method for flexural Properties of plastics, and the test results are shown in Table 3.
Flame retardancy: the flame retardancy of the electronic product case was measured according to UL94, and the test results are shown in table 4.
Aging resistance: the electronic product shell is subjected to 8 hours of illumination, wherein the wavelength of light is 313nm, the intensity is 0.48W/m 2, and the temperature is 70 ℃; the test results are shown in Table 4, and the test results are shown in Table 4, after 4 hours of darkness and at a temperature of 50℃under a cyclic condition.
Yellowness index after 200h illumination: the yellowness index of the outer shell of the electronic product was measured according to ASTM-D1925-70 (1998) e1 test method for yellowness index of plastics, and the measurement results are shown in Table 4.
TABLE 3 detection results
TABLE 4 detection results
As can be seen from the combination of the table 3 and the table 4, the master batch for preparing the electronic product shell of the application maintains good mechanical properties of the electronic product shell and improves ageing resistance of the electronic product shell through the synergistic effect of the raw materials, wherein the melt index of the electronic product shell is 16-33g/10min, the tensile strength is 66-89MPa, the elongation at break is 138-164%, the bending strength is 66-86MPa, the bending modulus is 2450-2588N/m 2, the flame retardance is V0, the electronic product shell is not yellowing, and the yellowness index after illumination for 200h is 4.95-5.72.
As can be seen from the combination of application example 1 and application comparative examples 1-2, the electronic product shell in application example 1 has a melt index of 16g/10min, a tensile strength of 66MPa, an elongation at break of 138%, a bending strength of 66MPa, a bending modulus of 2450N/m 2, a flame retardance of V0, no yellowing, and a yellowness index after 200h of illumination of 5.72, which is superior to that of application comparative examples 1-2, and the addition of an anti-aging material to the raw material of the master batch is more suitable, so that not only can the good mechanical properties of the electronic product shell be maintained, but also the fire resistance and the anti-aging property can be improved.
As can be seen from the combination of application examples 1 to 3, the electronic product shell in application example 3 has a melt index of 24g/10min, a tensile strength of 77MPa, an elongation at break of 147%, a bending strength of 75MPa, a bending modulus of 2491N/m 2, a flame retardance of V0, no yellowing, and a yellowness index after illumination for 200 hours of 5.41, which is superior to other application examples, and shows that the addition amount of the anti-aging material in application example 3 is more suitable, so that not only can the good mechanical properties of the electronic product shell be maintained, but also the fire resistance and the aging resistance can be improved.
As can be seen from the combination of application examples 4 and 6-7, the electronic product shell in application example 6 has a melt index of 30g/10min, a tensile strength of 85MPa, an elongation at break of 159%, a bending strength of 82MPa, a bending modulus of 2542N/m 2, a flame retardance of V0, no yellowing, and a yellowness index after illumination for 200 hours of 5.12, which is superior to other application examples, and shows that the anti-aging material in the master batch is more suitable to be prepared by adopting the preparation example 5, so that not only can the good mechanical property of the electronic product shell be maintained, but also the fire resistance and the aging resistance can be improved.
As can be seen from the combination of application examples 6 and 8, the electronic product shell in application example 8 has a melt index of 33g/10min, a tensile strength of 89MPa, an elongation at break of 164%, a flexural strength of 86MPa, a flexural modulus of 2588N/m 2, a flame retardance of V0, no yellowing, and a yellowness index after illumination for 200 hours of 4.95, which is superior to other application examples, and shows that the mica is more suitable to be pretreated before use, so that not only can the good mechanical properties of the electronic product shell be maintained, but also the fire resistance and the ageing resistance can be improved.
The foregoing embodiments are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. A master batch for preparing an electronic product shell, characterized in that: the material comprises the following raw materials in parts by weight: 90-100 parts of PC resin, 1-5 parts of MBS copolymer, 0.1-0.5 part of anti-dripping agent, 0.1-0.5 part of fireproof agent, 0.1-0.5 part of PETS, 0.3-0.9 part of anti-aging agent, 0.3-0.8 part of weather-proof agent and 5-12 parts of anti-aging material; wherein the anti-aging material is prepared by compounding a mica compound and PC slices;
The mica compound is prepared by the following method: pulverizing mica, sieving, adding into water, mixing, heating to 40-60deg.C, maintaining the temperature for 1-2 hr, adjusting pH to 7 with hydrochloric acid solution, adding titanium tetrachloride anhydrous ethanol solution, standing for 30-50min, reacting for 1-2 hr, cooling, centrifuging, taking out solid, washing with water for 3-5 times, oven drying, and calcining to obtain mica compound;
wherein, the adding amount of water in each 1g of mica is 4-6mL, and the mass fraction of the hydrochloric acid solution is 20%; the mass fraction of titanium tetrachloride in the titanium tetrachloride absolute ethyl alcohol solution is 70%;
The fire-proof agent is aluminum hydroxide and the anti-aging agent is ultraviolet absorber.
2. A master batch for preparing an electronic product housing according to claim 1, wherein: the weight ratio of the mica to the titanium tetrachloride absolute ethyl alcohol solution is 1: (1.5-2).
3. A master batch for preparing an electronic product housing according to claim 1, wherein: the anti-aging material is prepared by the following method: and uniformly mixing the mica compound and the PC slice, carrying out melt blending, extruding, granulating and cooling to obtain the anti-aging material.
4. A master batch for preparing an electronic product housing according to claim 3, wherein: the weight ratio of the mica compound to the PC slice is 1: (15-25).
5. A master batch for preparing an electronic product housing according to claim 1, wherein: the mica is pretreated by the following method when in use: and (3) placing the mica into a sodium hydroxide solution, heating, raising the temperature, carrying out suction filtration, washing, then placing into a hydrochloric acid solution for soaking, carrying out suction filtration, washing and drying to obtain the pretreated mica.
6. A method for preparing a master batch for preparing an electronic product housing according to any one of claims 1 to 5, comprising the steps of:
S1: uniformly mixing PC resin, MBS copolymer, anti-dripping agent, fireproof agent, PETS, anti-aging agent, weather-proof agent and anti-aging material to obtain a mixture;
S2: and melting, extruding, granulating and cooling the mixture to obtain the master batch for preparing the shell of the electronic product.
7. Use of a masterbatch according to any one of claims 1-5 for the preparation of an electronic product casing, characterized in that it comprises the following steps: and melting, injection molding, cooling and molding the master batch to obtain the electronic product shell.
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