CN115725132A - Low-smoke halogen-free high polymer material and preparation method thereof - Google Patents
Low-smoke halogen-free high polymer material and preparation method thereof Download PDFInfo
- Publication number
- CN115725132A CN115725132A CN202211712610.5A CN202211712610A CN115725132A CN 115725132 A CN115725132 A CN 115725132A CN 202211712610 A CN202211712610 A CN 202211712610A CN 115725132 A CN115725132 A CN 115725132A
- Authority
- CN
- China
- Prior art keywords
- magnesium
- low
- polymer material
- flame retardant
- hydroxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A low-smoke halogen-free high polymer material and a preparation method thereof comprise the following components in percentage by mass: 28-35% of polyolefin, 2-8% of compatilizer, 0.2-1.5% of lubricant, 0.2-0.8% of antioxidant, 0.3-1% of cross-linking agent, 50-60% of hydroxide and 1-8% of magnesium-based composite oxide flame retardant. Weighing each raw material substance, adding resin into a torque rheometer, adding the auxiliary agents and the powder in sequence after the resin is molten, and blending for 10-20min. On the basis of only using hydroxide halogen-free flame retardant, the smoke density value of the material is reduced again, the oxygen index of the material is improved, and the anti-dripping performance of single vertical combustion of the material is improved. The preparation method is simple, has low energy consumption, and can be widely applied to industrial production.
Description
Technical Field
The invention relates to the technical field of chemical materials, in particular to a low-smoke halogen-free high polymer material and a preparation method thereof.
Background
With the rapid development of polymer materials and the wide use of polymer materials in various fields of national economy, the fire hazard caused by the flammability of polymer materials is more and more generally concerned by governments and people. And the material containing the flame retardant can prevent the fire from being initiated and inhibit the small fire from developing into a catastrophic large fire, thereby reducing the fire risk.
In modern production processes, commonly used flame retardants include aluminum hydroxide, halogen-containing compounds, and the like, which can improve the flame retardant properties of materials, in various chemical solid powders or liquids. These materials can reduce the amount of smoke generated during combustion of the materials to some extent, increase the oxygen content required during combustion of the materials, and reduce the spread of the materials during combustion, but since plastic products are used in large quantities in national life, various research and development institutions or enterprises are also working on development of flame retardants (including synergistic flame retardants) with better effects under the circumstances of the above-mentioned existing effects.
Disclosure of Invention
The invention aims to provide a low-smoke halogen-free high polymer material and a preparation method thereof, which can reduce the smoke density value of the material again on the basis of only using hydroxide halogen-free flame retardant, improve the oxygen index of the material and improve the anti-dripping performance of single vertical combustion of the material. The preparation method is simple, has low energy consumption, and can be widely applied to industrial production.
A low-smoke halogen-free high polymer material comprises the following components in percentage by mass: 28-35% of polyolefin, 2-8% of compatilizer, 0.2-1.5% of lubricant, 0.2-0.8% of antioxidant, 0.3-1% of cross-linking agent, 50-60% of hydroxide and 1-8% of magnesium-based composite oxide flame retardant.
Further, the magnesium-based composite oxide flame retardant is prepared by chemically bonding two or more of magnesium oxide, silicon dioxide, zinc oxide and magnesium borate through a coupling agent according to a certain proportion; wherein the proportion of magnesium oxide is 60-100%, the proportion of silicon dioxide is 0-40%, and the proportion of zinc oxide and magnesium borate is less than 15%.
Further, according to the invention, a liquid medium is used in advance according to the mixture ratio for mixing to prepare a suspension, and the medium is deionized water; adding the suspension into a high-shear disperser, stirring for 30-90min, transferring into grinding equipment, adding a coupling agent for bonding, filtering and drying after bonding is completed and the powder is ground to reach the particle size of 1-10 mu m, then carrying out crushing and grading treatment, and finally collecting for later use.
Furthermore, the coupling agent is one or more of N- (2-aminoethyl) -3-aminopropyltriethoxysilane, 3-glycidoxypropylmethyldiethoxysilane and 3- (methacryloyloxy) propyltriisopropoxysilane.
Further, the mixing ratio of the magnesium-based composite oxide flame retardant and the hydroxide is 1:5-20; the hydroxide is one or two of magnesium hydroxide and aluminum hydroxide.
Further, the polyolefin of the invention is one or more of ethylene-vinyl acetate copolymer, polyethylene, low density polyethylene, linear low density polyethylene and polyolefin elastomer; the polyolefin elastomer has a melt index of 1 to 10g/min.
Furthermore, in the ethylene-vinyl acetate copolymer, the mass of the vinyl acetate accounts for 10-50% of the total mass of the ethylene-vinyl acetate, and the melt index of the ethylene-vinyl acetate copolymer is 2-10g/min.
Furthermore, the compatilizer is maleic anhydride grafted EVA or maleic anhydride grafted PE, and the melt index is 1-5g/min.
Further, the antioxidant is one or more of 1010, 168, DLTDP and 412S; the lubricant is one or more of zinc stearate, polyethylene wax, silicone and polytetrafluoroethylene; the cross-linking agent is one or more of benzoyl peroxide, 2, 4-dichlorobenzoyl peroxide and dicumyl peroxide.
A preparation method of a low-smoke halogen-free high polymer material comprises the steps of weighing each raw material substance, firstly adding polyolefin into a torque rheometer, adding an auxiliary agent and powder after the polyolefin is molten, and blending for 10-20min; taking out the mixture after blending, weighing according to the weight required by the test sheet, adding the mixture into a sheet die for tabletting and forming, and then cutting the formed sheet according to the requirements of the test item for sample preparation for later use; the auxiliary agent is: compatilizer, lubricant, antioxidant and crosslinking agent; the powder is hydroxide and a magnesium-based composite oxide flame retardant; the temperature of the torque rheometer was set to 140-160 ℃ and the temperature range of the material was 140-160 ℃.
According to the low-smoke halogen-free flame-retardant high polymer material, after the magnesium-based composite oxide flame retardant and the hydroxide are compounded and filled, the smoke density (Ds.max) value can be remarkably reduced, the oxygen index (LOI) is improved by more than 2 units, and meanwhile, the level of single vertical combustion from no passage to passage is improved.
In the preparation process of the magnesium-based composite oxide flame retardant, different components are sheared and bonded by a grinding device and a coupling agent, and then the components are filtered, dried, crushed and classified and the like.
According to the low-smoke halogen-free high polymer material and the preparation method thereof, the smoke density value of the material is reduced again on the basis of only using the hydroxide halogen-free flame retardant, the oxygen index of the material is improved, and the anti-dripping performance of single vertical combustion of the material is improved. The preparation method is simple, has low energy consumption, and can be widely applied to industrial production.
Drawings
FIG. 1 is a flow chart of the present invention for preparing a magnesium-based composite oxide flame retardant.
Figure 2 is a graph comparing the smoke density curves obtained for the two formulations listed in example 2.
FIG. 3 is a graph comparing the heat release rate curves obtained for the two formulations set forth in example 5.
Detailed Description
A preparation method of low smoke zero halogen polymer material comprises weighing each raw material, adding polyolefin into a torque rheometer, adding auxiliary agent and powder after polyolefin is molten, and blending for 10-20min; taking out the mixture after blending, weighing according to the weight required by the test sheet, adding the mixture into a sheet die for tabletting and forming, and cutting the formed sheet according to the requirements of the test items for preparing samples for later use; the auxiliary agent is: compatilizer, lubricant, antioxidant and crosslinking agent; the powder is hydroxide and a magnesium-based composite oxide flame retardant; the temperature of the torque rheometer is set to be 140-160 ℃, and the temperature range of the material is 140-160 ℃. The paint comprises the following components in percentage by mass: 28-35% of polyolefin, 2-8% of compatilizer, 0.2-1.5% of lubricant, 0.2-0.8% of antioxidant, 0.3-1% of cross-linking agent, 50-60% of hydroxide and 1-8% of magnesium-based composite oxide flame retardant.
As shown in FIG. 1, the process for preparing the Mg-based composite oxide flame retardant is as follows:
(1) Preparing magnesium oxide (MgO), silicon dioxide (SiO) 2 ) Zinc oxide (ZnO), magnesium borate (MgB) 2 O 3 ) Wherein the proportion of magnesium oxide is 60-100%, the proportion of silicon dioxide is 0-40%, and the proportion of zinc oxide and magnesium borate is less than 15%. The above components are put into a liquid medium to prepare a suspension. The liquid medium is preferably deionized water, and has a solids content of 5-50%, preferably 10-20%.
(2) The coupling agent may be one or more of N- (2-aminoethyl) -3-aminopropyltriethoxysilane, 3-glycidoxypropylmethyldiethoxysilane and 3- (methacryloyloxy) propyltriisopropoxysilane, and the amount of the coupling agent used is 0.1 to 10%, preferably 0.5 to 5% based on the solid content of the suspension.
(3) Adding the suspension in (1) into high-shear disperser, stirring for 30-90min to reduce its particle diameter to 5-15 μm, transferring to grinding device, and further grinding with grinding medium
And (3) adding the coupling agent into the pickaxe beads for bonding reaction. The grinding device comprises a jacket, cooling water is needed to be introduced for cooling treatment in the grinding process, and the purpose is to prevent the final bonding effect from being influenced by heat generated in the shearing bonding process.
(4) The grinding speed is 50-500rpm/min, preferably 100-200rpm/min. Premixing for about 5-10min, adding the coupling agent, continuously stirring and grinding for about 10-60min, taking a small amount of liquid every 10min from the beginning of grinding, testing the particle size, and discharging for later use after the requirement is met. If the preferred particle size has not been reached for a maximum of 60min, the grinding time can be increased appropriately, but in principle should not exceed 90min.
And filtering the ground slurry to obtain a filter cake. Specifically, slurry is conveyed into a filter press through a diaphragm pump, and liquid in the slurry permeates through filter cloth and is finally collected into a storage tank; the filter cake is gradually formed on the surface of the filter plate, namely the composite oxide wet filter cake, and the water content is 30-70%.
(5) Drying the wet filter cake, carrying out graded depolymerization to obtain a composite oxide flame retardant, and drying the wet filter cake at the temperature of 100-250 ℃ to obtain composite oxide dry powder; impurities and the like are prevented from being introduced during drying. And crushing and grading the obtained composite oxide dry powder, and then sorting out the composite oxide with the particle size D50 of less than or equal to 5 microns, so that the sorted matter is the composite oxide flame retardant. The classified magnesium-based composite oxide flame retardant has narrow particle size distribution, no particles and the like. And (3) packing and weighing the classified composite oxide flame retardant by using a waterproof and moisture-proof packing bag according to the required weight, and then selling and using the flame retardant as a final product.
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Raw materials
Remarking: the magnesium-based composite oxide flame retardant (1) and the magnesium-based composite oxide flame retardant (2) are different in zinc oxide and magnesium borate ratio. Wherein the proportion of zinc oxide and magnesium borate in the magnesium-based composite oxide flame retardant (1) is 10-15%, and the proportion of zinc oxide and magnesium borate in the magnesium-based composite oxide flame retardant (2) is 2-8%.
Device
| Wet grinding device | ATK FLAME RETARDANT MATERIALS Co. | |
| Laser particle size analyzer | Baite (Baite) | |
| Filter | ATK FLAME RETARDANT MATERIALS Co. | |
| Drying apparatus | ATK FLAME RETARDANT MATERIALS Co. | |
| Crushing machine | Hebei Benchen technology | |
| Torque rheometer | RM-200B | Harbin Hapu Electric Technology Co., Ltd. |
| Open plasticator | Dongguan Xihua detection Instrument Co., ltd | |
| Flat vulcanizing machine | QLB-250kN | Yixing light machinery Co., ltd |
| Plate cooler | Shanghai Qicai Hydraulic machinery, inc | |
| Oxygen index instrument | Motis technology (China) Co., ltd | |
| Horizontal and vertical combustion instrument | VW-1 | Motis technology (China) Inc |
| Smoke density tester | FTT Co of UK | |
| Cone calorimeter | FTT Co of UK |
The experimental method of each embodiment of the invention is as follows:
tabletting (tabletting temperature 165 ℃, pressure 10 MPa): preheating for 5min, hot pressing for 5min, and cooling for 8min;
mechanical properties: GB/T528;
LOI：GB/T 2406；
VW-1：UL 1581；
Ds.max：ISO 5659；
cone calorimeter: ISO 5660.
Example 1, in a crosslinking system, with a formulation containing magnesium hydroxide and aluminum hydroxide prepared by a mineral method, the relative performance of the flame retardant (1) added with the magnesium-based composite oxide is compared, and the mixture ratio of the components is shown in the following table:
the experiment can obviously find that the LOI value can be obviously improved by 4 units by using the magnesium-based composite oxide flame retardant (1), and the absolute value of smoke density is reduced by about 55.
Example 2, in a thermoplastic system, the relative performance of the flame retardant (2) containing magnesium-based composite oxide is compared under the formulation of chemical method magnesium hydroxide and aluminum hydroxide, and the mixture ratio of each component is shown in the following table:
| formulation(s) | 1 | 2 |
| EVA2803 | 31 | 31 |
| MC226 | 5 | 5 |
| Silicone masterbatch | 0.8 | 0.8 |
| I-1010 | 0.2 | 0.2 |
| Aitemina 140 | 47 | 47 |
| Aitemag 12 | 16 | 14.4 |
| Magnesium-based composite oxide flame retardant (2) | - | 1.6 |
| Total amount of% | 100 | 100 |
| Density of smoke | 416 | 337 |
The above experiment shows that the smoke density of the material of the above formulation can be reduced by 10% or more in the case of using the magnesium-based composite oxide flame retardant (2), and it can be found that the smoke generation rate of the formulation 2 containing the magnesium-based composite oxide flame retardant (2) is relatively slower in combination with fig. 2.
Example 3 comparison of anti-dripping properties in thermoplastic systems with different hydroxide ratios. The mixture ratio of each component is shown in the following table:
the above experiments show that the anti-dripping performance is improved in the case of containing magnesium hydroxide, but the anti-dripping performance can be improved again after adding a small amount of the magnesium-based composite oxide flame retardant (2).
Example 4 comparison of properties of flame retardant (1) using magnesium-based composite oxide, in which the following oxides were added singly, or magnesium hydroxide and aluminum hydroxide were compounded in a crosslinking system. The mixture ratio of each component is shown in the following table:
example 5, cone test comparison of flame retardant (1) containing MgO or Mg-based composite oxide. The mixture ratio of each component is shown in the following table:
| formulation of | 2 | 6 |
| EVA2803 | 31.4 | 31.4 |
| MC226 | 5 | 5 |
| Silicone masterbatch | 0.8 | 0.8 |
| I-1010 | 0.2 | 0.2 |
| DCP peroxide | 0.6 | 0.6 |
| Aitemina 140 | 31 | 31 |
| Aitemag 55FM | 25 | 25 |
| MgO | 6 | |
| Magnesium-based composite oxide flame retardant (1) | 6 | |
| Total amount of% | 100 | 100 |
| Ignition time, s | 72.00 | 69.00 |
| Total Heat Release amount, MJ/m2 | 65.64 | 65.8 |
| Total smoke emission, m2/m2 | 887.79 | 836.4 |
| Maximum heat release, kW/m 2 | 267.8007 | 245.456 |
| Fire index FPI, sm2/Kw | 0.27 | 0.24 |
The above experiments show that the LOI and smoke density are obviously improved by using the magnesium-based composite oxide flame retardant (1) relative to the single use of one metal oxide. As can be seen from the above table in combination with FIG. 3, the use of the magnesium-based composite oxide flame retardant (1) also performed better in the tapered amount of performance.
Example 6, the performance of the flame retardant (1) with the addition of the magnesium-based composite oxide alone was compared with the performance of the flame retardant with the addition of the two oxides.
| Formulation of | 1 | 2 | 3 | 4 |
| EVA2803 | 31.4 | 31.4 | 31.4 | 31.4 |
| MC226 | 5 | 5 | 5 | 5 |
| Silicone masterbatch | 0.8 | 0.8 | 0.8 | 0.8 |
| I-1010 | 0.2 | 0.2 | 0.2 | 0.2 |
| DCP peroxide | 0.6 | 0.6 | 0.6 | 0.6 |
| Aitemina 140 | 31 | 31 | 31 | 31 |
| Aitemag 55FM | 25 | 25 | 25 | 25 |
| MgO | 4 | 4 | 4 | |
| |
2 | |||
| MgB 2 O 3 | 2 | |||
| |
2 | |||
| Magnesium-based composite oxide flame retardant (1) | 6 | |||
| Total amount of% | 100 | 100 | 100 | 100 |
| LOI | 37 | 38 | 37 | 41 |
| Density of smoke | 399 | 387 | 375 | 334 |
The above experiments show that even if two oxides are used for conventional filling compounding, the effect of using the magnesium-based composite oxide flame retardant (1) mentioned in the present invention is not significantly achieved.
Claims (10)
1. A low-smoke halogen-free high polymer material is characterized by comprising the following components in percentage by mass: 28-35% of polyolefin, 2-8% of compatilizer, 0.2-1.5% of lubricant, 0.2-0.8% of antioxidant, 0.3-1% of cross-linking agent, 50-60% of hydroxide and 1-8% of magnesium-based composite oxide flame retardant.
2. The low-smoke halogen-free polymer material according to claim 1, characterized in that the magnesium-based composite oxide flame retardant is chemically bonded by a coupling agent in a certain proportion by two or more of magnesium oxide, silicon dioxide, zinc oxide and magnesium borate; wherein the proportion of magnesium oxide is 60-100%, the proportion of silicon dioxide is 0-40%, and the proportion of zinc oxide and magnesium borate is less than 15%.
3. The low-smoke halogen-free polymer material according to claim 2, characterized in that a liquid medium is mixed in advance according to the above proportion to prepare a suspension, and the medium is deionized water; adding the suspension into a high-shear disperser, stirring for 30-90min, transferring into a grinding device, adding a coupling agent for bonding, filtering and drying after bonding is completed and the powder is ground to reach a particle size of 1-10 μ rn, then carrying out crushing and grading treatment, and finally collecting for later use.
4. The low-smoke halogen-free polymer material as claimed in claim 1, wherein the coupling agent is one or more of N- (2-aminoethyl) -3-aminopropyltriethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, and 3- (methacryloyloxy) propyltriisopropoxysilane.
5. The low-smoke halogen-free polymer material as claimed in claim 1, wherein the mixing ratio of the magnesium-based composite oxide flame retardant to the hydroxide is 1:5-20 parts of; the hydroxide is one or two of magnesium hydroxide and aluminum hydroxide.
6. The low-smoke halogen-free polymer material according to claim 1, wherein the polyolefin is one or more of ethylene-vinyl acetate copolymer, polyethylene, low density polyethylene, linear low density polyethylene, and polyolefin elastomer; the polyolefin elastomer has a melt index of 1 to 10g/min.
7. The low smoke zero halogen polymer material of claim 1, wherein the mass of the ethylene-vinyl acetate copolymer is 10-50% of the total mass of the ethylene-vinyl acetate, and the melt index of the ethylene-vinyl acetate copolymer is 2-10g/min.
8. The low smoke zero halogen polymer material of claim 1, wherein the compatibilizer is maleic anhydride grafted EVA or maleic anhydride grafted PE, and the melt index is 1-5g/min.
9. The low-smoke halogen-free polymer material as claimed in claim 1, wherein the antioxidant is one or more of 1010, 168, DLTDP, 412S; the lubricant is one or more of zinc stearate, polyethylene wax, silicone and polytetrafluoroethylene; the cross-linking agent is one or more of benzoyl peroxide, 2, 4-dichlorobenzoyl peroxide and dicumyl peroxide.
10. The method for preparing the low-smoke halogen-free high polymer material of claim 1 is characterized in that each raw material substance is weighed, polyolefin is firstly added into a torque rheometer, and an auxiliary agent and powder are added for blending after the polyolefin is melted, wherein the blending time is 10-20min; taking out the mixture after blending, weighing according to the weight required by the test sheet, adding the mixture into a sheet die for tabletting and forming, and cutting the formed sheet according to the requirements of the test items for preparing samples for later use; the auxiliary agent is: compatilizer, lubricant, antioxidant and crosslinking agent; the powder is hydroxide and a magnesium-based composite oxide flame retardant; the temperature of the torque rheometer is set to be 140-160 ℃, and the temperature range of the material is 140-160 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211712610.5A CN115725132A (en) | 2022-12-29 | 2022-12-29 | Low-smoke halogen-free high polymer material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211712610.5A CN115725132A (en) | 2022-12-29 | 2022-12-29 | Low-smoke halogen-free high polymer material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115725132A true CN115725132A (en) | 2023-03-03 |
Family
ID=85301897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211712610.5A Pending CN115725132A (en) | 2022-12-29 | 2022-12-29 | Low-smoke halogen-free high polymer material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115725132A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5760115A (en) * | 1995-03-03 | 1998-06-02 | Tosoh Corporation | Fire-retardant polymer composition |
| CN101817952A (en) * | 2010-05-19 | 2010-09-01 | 西安交通大学 | Soft low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof |
| CN102020804A (en) * | 2009-09-15 | 2011-04-20 | 山东安澜高分子材料有限公司 | Thermoplastic crack resistant type low smoke zero halogen flame-retardant polyolefin cable sheath material and preparation method thereof |
| CN105968414A (en) * | 2016-05-13 | 2016-09-28 | 江苏艾特克阻燃材料有限公司 | Attapulgite-synergetic hydroxide flame retardant |
| CN107892771A (en) * | 2017-12-14 | 2018-04-10 | 肇庆中乔电气实业有限公司 | A kind of cold-resistant low-smoke halogen-free flame-proof cable material and preparation method thereof |
| CN111116991A (en) * | 2020-02-11 | 2020-05-08 | 江苏艾特克阻燃材料有限公司 | Composite hydroxide smoke-suppression type flame retardant and preparation method and application thereof |
| CN113372644A (en) * | 2021-05-14 | 2021-09-10 | 宝新高分子科技(广州)有限公司 | High-flame-retardant cross-linked low-smoke halogen-free polyolefin insulating material and preparation method thereof |
-
2022
- 2022-12-29 CN CN202211712610.5A patent/CN115725132A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5760115A (en) * | 1995-03-03 | 1998-06-02 | Tosoh Corporation | Fire-retardant polymer composition |
| CN102020804A (en) * | 2009-09-15 | 2011-04-20 | 山东安澜高分子材料有限公司 | Thermoplastic crack resistant type low smoke zero halogen flame-retardant polyolefin cable sheath material and preparation method thereof |
| CN101817952A (en) * | 2010-05-19 | 2010-09-01 | 西安交通大学 | Soft low-smoke halogen-free flame-retardant polyolefin cable material and preparation method thereof |
| CN105968414A (en) * | 2016-05-13 | 2016-09-28 | 江苏艾特克阻燃材料有限公司 | Attapulgite-synergetic hydroxide flame retardant |
| CN107892771A (en) * | 2017-12-14 | 2018-04-10 | 肇庆中乔电气实业有限公司 | A kind of cold-resistant low-smoke halogen-free flame-proof cable material and preparation method thereof |
| CN111116991A (en) * | 2020-02-11 | 2020-05-08 | 江苏艾特克阻燃材料有限公司 | Composite hydroxide smoke-suppression type flame retardant and preparation method and application thereof |
| CN113372644A (en) * | 2021-05-14 | 2021-09-10 | 宝新高分子科技(广州)有限公司 | High-flame-retardant cross-linked low-smoke halogen-free polyolefin insulating material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Nachtigall et al. | Macromolecular coupling agents for flame retardant materials | |
| CN1047252C (en) | Non-halogenated pire retardant resin composition and wires and cables coated therewith | |
| CN1796450B (en) | Low smoky, fire retardant cable material of polyolefin without halogen, and preparation method | |
| CN108017826A (en) | A kind of flame-retardant polyethylene sheathing material and preparation method thereof | |
| CN108659575A (en) | A kind of superfine heavy calcium carbonate filler and preparation method thereof | |
| US3206419A (en) | Dispersion of carbon black in polyolefins | |
| KR20070051833A (en) | Flame retarding composition with monomodal particle size distribution based on metal hydroxide and clay | |
| US6143816A (en) | Fire retardant plastic mixture and method of producing a filler material | |
| CN108059761A (en) | A kind of 125 DEG C of cross-linking radiation photovoltaic cable flame-retardant sheath materials and preparation method thereof | |
| WO2017177482A1 (en) | Oil-resistant, low-smoke, halogen-free and flame-retardant polyolefin cable material and preparation method therefor | |
| TWI522412B (en) | Translucent polyolefin film for packaging applications | |
| Yew et al. | Fire propagation performance of intumescent fire protective coatings using eggshells as a novel biofiller | |
| Beltrán-Ramírez et al. | Effect of nanometric metallic hydroxides on the flame retardant properties of HDPE composites | |
| CN100586962C (en) | Thermally conductive sheet | |
| Wang et al. | Effects of PE-g-DBM as a compatiblizer on mechanical properties and crystallization behaviors of magnesium hydroxide-based LLDPE blends | |
| CN106065109B (en) | Halogen-free cable jacket rubber material and preparation method thereof | |
| US3586247A (en) | Dispersion of pigments in normally solid carrier media | |
| CN115725132A (en) | Low-smoke halogen-free high polymer material and preparation method thereof | |
| CN111116991B (en) | Composite hydroxide smoke-suppression type flame retardant and preparation method and application thereof | |
| CN110194851B (en) | Composite phosphorus alkene flame retardant, flame-retardant polymer composite material and preparation method thereof | |
| US3257351A (en) | Dispersion of pigments in ethylene polymers | |
| CN111004427A (en) | HDPE carrier carbon black master batch for PE pressure pipeline and preparation method thereof | |
| US3085988A (en) | Process for incorporating additives into polymers and resulting product | |
| CN114656706A (en) | Halogen-free flame-retardant polyethylene sheath material and preparation method thereof | |
| CN111560144A (en) | Low-smoke halogen-free polyolefin cable material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |