CN102766321B - Black, flame-retardant and reinforced PBT material with high CTI (comparative tracking index) value and preparation method thereof - Google Patents
Black, flame-retardant and reinforced PBT material with high CTI (comparative tracking index) value and preparation method thereof Download PDFInfo
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- CN102766321B CN102766321B CN201210263577.2A CN201210263577A CN102766321B CN 102766321 B CN102766321 B CN 102766321B CN 201210263577 A CN201210263577 A CN 201210263577A CN 102766321 B CN102766321 B CN 102766321B
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Abstract
The invention relates to a black, flame-retardant and reinforced PBT material with CTI (high comparative tracking index) value,. The raw materials comprise PBT, PE, toughening agent ST-2000, 1,2-Bis(pentabromophenyl) ethane, antimony trioxide, melamine, aniline black masterbatch, antioxidant 1010, antioxidant 168, lubricant 1080 and glass fiber. A preparation method provided by the invention is as follows: the raw materials except the glass fiber are blended and then added into a feeding hopper of a screw extruder; when the glass fiber is added into the screw extruder, the raw materials are melt extruded and granulated to obtain the final product. The product prepared by the method provided by the invention overcomes the drawback of low CTI value of the black PBT material, has better flame retardant effect and is not liable to crack when used; moreover, the product has a CTI value of over 250V. The manufactured product has the advantages of no-fogging on the surface, good glossiness and low cost of the material price.
Description
Technical field
The present invention relates to a kind of high CTI value black flame-retardant and strengthen PBT material and preparation method thereof, be mainly used in making relay1 case etc.Belong to technical field of polymer materials.
Background technology
Phase ratio creepage tracking index (or claim relative discharge tracking index) Comparative Tracking Index (CTI): material surface is able to take 50 electrolytic solution (0.1% aqueous ammonium chloride solution) and does not form the maximum voltage value of tracking, and unit is V.The product using for some electronic devices and components aspects such as relay1 cases, it has higher requirement to CTI value, requires its CTI value to meet or exceed 250V.Existing high CTI value reinforced PBT (polybutylene terephthalate) matrix material, in order to guarantee higher CTI value, abandoned the good halogen containing flame-retardant of use flame retardant effect, and use a large amount of halogen-free flame retardants of interpolation instead, reach flame retardant effect, and the consumption of fire retardant increases, make the material mechanical performance variation of product, in product use procedure, be prone to cracking or embrittlement phenomenon.
Chinese patent application CN102120867A discloses a kind of flame-retardant reinforced PBT matrix material and production technique thereof with high CTI, it adopts TDE and antimonous oxide to improve flame retardant properties, adopt composite toughing agent and fluoro-resin to increase its intensity and toughness, but fluoro-resin price is still expensive, product price is appointed so high.
In addition, in known material, be white domestic appliances materials, for the PBT matrix material of black, owing to wherein having added carbon black, cause the CTI of material to reduce.Also do not have at present CTI in the PBT material of black to reach report more than 250V.In addition, the PBT material of black, its surface easily hazes, and low in glossiness affects appearance effect.
Summary of the invention
One of object of the present invention is to overcome above-mentioned deficiency, provides a kind of high CTI value black flame-retardant to strengthen PBT material, and it is the good flame retardant effect of tool both, not easy to crack during use, and more than CTI reaches 250V, material price cost is low simultaneously, and surface does not haze.
Two of object of the present invention is to provide a kind of high CTI value black flame-retardant to strengthen the preparation method of PBT material, and its technique is simple, with low cost.
The object of the present invention is achieved like this:
High CTI value black flame-retardant strengthens a PBT material, and its raw materials quality part proportioning is as follows:
PBT 35-45 part
PE 2-6 part
Toughner ST-2000 2-8 part
TDE 8-15 part
Antimonous oxide 1-5 part
Trimeric cyanamide 2-8 part
Nigrosine Masterbatch 1-5 part
Antioxidant 1010 0.05-0.2 part
Irgasfos 168 0.1-0.5 part
Lubricant 1080 0.1-0.5 parts
Glass fibre 25-35 part.
Described toughner is toughner ST-2000.
Its raw materials quality part proportion optimization scheme of the present invention is as follows:
39.5 parts of PBT
4 parts of PE
5 parts of toughner ST-2000
11 parts of TDE
2 parts of antimonous oxides
5 parts of trimeric cyanamides
3 parts of nigrosine Masterbatchs
0.1 part of antioxidant 1010
0.2 part of irgasfos 168
1,080 0.2 parts of lubricants
30 parts, glass fibre.
A kind of high CTI value black flame-retardant strengthens the preparation method of PBT material, described method is that proportioning is prepared raw material on request, then first by PBT, PE, toughner ST-2000, TDE, antimonous oxide, trimeric cyanamide, nigrosine Masterbatch, antioxidant 1010, irgasfos 168 and lubricant 1080 blend, then add screw extrusion press feeding hopper, on screw extrusion press, add glass fibre simultaneously, through screw extrusion press, melt extrude granulation.
The extrusion temperature of described screw extrusion press is 230-240 ℃.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention adopts aniline black masterbatch as tinting material, reaches black effect, adopts trimeric cyanamide to guarantee its high CTI simultaneously; Adopt TDE and antimonous oxide to guarantee its high flame resistance, antioxidant 1010 and irgasfos 168 mix use, strengthen anti-oxidant resistance toheat; Add PE and toughner ST-2000 to increase its toughness; Add glass fibre, play enhancement.
High CTI value black flame-retardant of the present invention strengthens product prepared by PBT material, overcome the low defect of black PBT material C TI value, it is the good flame retardant effect of tool both, not easy to crack during use, and more than CTI reaches 250V, and the product surface of making does not haze, glossiness is good, and material price cost is low simultaneously.
Embodiment
Embodiment 1:
High CTI value black flame-retardant strengthens a PBT material, and its raw materials quality part is composed as follows:
39.5 parts of PBT
4 parts of PE
5 parts of toughner ST-2000
11 parts of TDE
2 parts of antimonous oxides
5 parts of trimeric cyanamides
3 parts of nigrosines
0.1 part of antioxidant 1010
0.2 part of irgasfos 168
1,080 0.2 parts of lubricants
30 parts, glass fibre.
Preparation method is:
First, by each raw material blend except glass fibre, then add screw extrusion press feeding hopper, add glass fibre on screw extrusion press, through screw extrusion press, melt extrude, granulation, obtains finished product simultaneously.
Embodiment 2:
The present embodiment is only that from the difference of embodiment 1 proportion by weight of each raw material is different, wherein:
40 parts of PBT
5 parts of PE
4 parts of toughner ST-2000
9 parts of TDE
3 parts of antimonous oxides
2 parts of trimeric cyanamides
1 part of nigrosine Masterbatch
0.2 part of antioxidant 1010
0.4 part of irgasfos 168
1,080 0.4 parts of lubricants
35 parts, glass fibre.
Embodiment 3:
The present embodiment is only that from the difference of embodiment 1 proportion by weight of each raw material is different, wherein:
42 parts of PBT
3 parts of PE
5 parts of toughner ST-2000
8 parts of TDE
2 parts of antimonous oxides
4 parts of trimeric cyanamides
Nigrosine Masterbatch 3
0.1 part of antioxidant 1010
0.4 part of irgasfos 168
1,080 0.5 parts of lubricants
32 parts, glass fibre.
Embodiment 4:
The present embodiment is only that from the difference of embodiment 1 proportion by weight of each raw material is different, wherein:
38 parts of PBT
4 parts of PE
6 parts of toughner ST-2000
10 parts of TDE
4 parts of antimonous oxides
6 parts of trimeric cyanamides
2.5 parts of nigrosine Masterbatchs
0.1 part of antioxidant 1010
0.2 part of irgasfos 168
1,080 0.2 parts of lubricants
29 parts, glass fibre.
Embodiment 5:
The present embodiment is only that from the difference of embodiment 1 proportion by weight of each raw material is different, wherein:
36 parts of PBT
5 parts of PE
5 parts of toughner ST-2000 (star shellfish reaches (Beijing) chemical materials company limited)
10 parts of TDE
3 parts of antimonous oxides
7 parts of trimeric cyanamides
4.2 parts of nigrosine Masterbatchs
0.2 part of antioxidant 1010
0.3 part of irgasfos 168
1,080 0.3 parts of lubricants
29 parts, glass fibre.
The product of the various embodiments described above is made to standard test specimen (thickness is 3.20 ± 0.05mm), then by GB/T 4207-2003 solid insulating material measuring method of comparative tracking index and resistance to electric trace index under wet condition, detect, its result is as follows:
| sample example | test voltage (V) | test phenomenon is described |
| embodiment 1 | 350 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
| embodiment 1 | 375 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
| embodiment 1 | 400 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
| embodiment 2 | 350 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
| embodiment 2 | 375 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
| embodiment 3 | 350 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
| embodiment 4 | 350 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
| embodiment 4 | 375 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
| embodiment 5 | 350 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
| embodiment 5 | 375 | before 25s after the 100th dropping liquid completes, overflow means is action, and sample does not produce flame. |
By experimental result, can be found out, black PBT material prepared by the present invention, its CTI value meets the requirement of CTI value >=250V more than reaching 350V completely.
The product of each embodiment is made respectively to sample, by GB/T2408, carry out vertical flame retardant resistance detection, detecting instrument adopts CZF-3 horizontal vertical burning determinator, and result is as follows:
| ? | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Flame retardant rating | V-0 | V-0 | V-0 | V-0 | V-0 |
The product of each embodiment is made respectively to relay1 case, and without cracking or embrittlement phenomenon, and product black surface do not haze, and glossiness is good.
Claims (4)
1. high CTI value black flame-retardant strengthens a PBT material, it is characterized in that: its raw materials quality part proportioning is as follows:
PBT 35-45 part
PE 2-6 part
Toughner ST-2000 2-8 part
TDE 8-15 part
Antimonous oxide 1-5 part
Trimeric cyanamide 2-8 part
Nigrosine Masterbatch 1-5 part
Antioxidant 1010 0.05-0.2 part
Irgasfos 168 0.1-0.5 part
Lubricant 1080 0.1-0.5 parts
Glass fibre 25-35 part.
2. a kind of high CTI value black flame-retardant according to claim 1 strengthens PBT material, it is characterized in that: its raw materials quality part proportioning is as follows:
39.5 parts of PBT
4 parts of PE
5 parts of toughner ST-2000
11 parts of TDE
2 parts of antimonous oxides
5 parts of trimeric cyanamides
3 parts of nigrosine Masterbatchs
0.1 part of antioxidant 1010
0.2 part of irgasfos 168
1,080 0.2 parts of lubricants
30 parts, glass fibre.
3. a high CTI value black flame-retardant strengthens the preparation method of PBT material, it is characterized in that: described method is to prepare raw material by each proportioning raw materials of claim 1 or 2, then first by PBT, PE, toughner ST-2000, TDE, antimonous oxide, trimeric cyanamide, nigrosine Masterbatch, antioxidant 1010, irgasfos 168 and lubricant 1080 blend, then add screw extrusion press feeding hopper, on screw extrusion press, add glass fibre simultaneously, through screw extrusion press, melt extrude granulation.
4. a kind of high CTI value black flame-retardant strengthens the preparation method of PBT material according to claim 3, it is characterized in that: the extrusion temperature of described screw extrusion press is 230-240 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210263577.2A CN102766321B (en) | 2012-07-28 | 2012-07-28 | Black, flame-retardant and reinforced PBT material with high CTI (comparative tracking index) value and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210263577.2A CN102766321B (en) | 2012-07-28 | 2012-07-28 | Black, flame-retardant and reinforced PBT material with high CTI (comparative tracking index) value and preparation method thereof |
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| CN102766321A CN102766321A (en) | 2012-11-07 |
| CN102766321B true CN102766321B (en) | 2014-02-26 |
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| CN103937172A (en) * | 2014-03-27 | 2014-07-23 | 苏州益群模具有限公司 | Corrosion-resistant injection molding material for automobiles |
| CN112795150B (en) * | 2020-12-30 | 2023-02-07 | 广东顺德顺炎新材料股份有限公司 | high-CTI (comparative tracking index) modified PBT (polybutylene terephthalate) material suitable for various colors and preparation method thereof |
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| CN102321349B (en) * | 2011-08-05 | 2012-10-03 | 江阴市龙山合成材料有限公司 | Glass fiber reinforced halogen-free flame-retardant polybutylene terephthalate (PBT) |
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