CN101054482A - Surface modifying method for natural brucite ultra thin powder and application thereof - Google Patents
Surface modifying method for natural brucite ultra thin powder and application thereof Download PDFInfo
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- CN101054482A CN101054482A CN 200610039737 CN200610039737A CN101054482A CN 101054482 A CN101054482 A CN 101054482A CN 200610039737 CN200610039737 CN 200610039737 CN 200610039737 A CN200610039737 A CN 200610039737A CN 101054482 A CN101054482 A CN 101054482A
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Abstract
The invention relates to a surface modify method of a natural brucite ultra fine powder, comprising: making the natural brucite pretreat, break up, abrade, grind in the gas flow disintegrator, adding the compound coupling agent in the anhydrous medium, activating and modifying on the continuous surface modifying machine. The produced natural brucite ultra fine powder has a high activation index and has an improved flame retardancy and mechanical performance as flame retardant after surface modifying treatment to the powder lot with compound coupling agent. The invention has a continuous production process and increased production efficiency after the activating and modifying treatment on the continuous surface modifying machine.
Description
Technical field
The present invention relates to a kind of process for modifying surface of environmental-protection flame-retardant compound, specifically a kind of surface modifying method of natural brucite ultra thin powder and application thereof.
Background technology
Magnesium hydroxide as a kind of nontoxic, fire-retardant, press down cigarette, heat-stable halogen-free inorganic flame retardant, present good development prospect at home and abroad, just progressively replace aluminium hydroxide.Brucite is highly purified hydrogeneous magnesian ore, is the desirable feedstock of inorganic combustion inhibitor, because this is as inorganics, there is polarity on the surface, and is relatively poor with superpolymer base-material consistency.For the mechanical property that guarantees to add the back matrix material in the scope of application, must carry out modification to its surface and handle.Dry method modification saves the filtration and the drying and other steps of back owing to do not add water medium, and cost is low, is extensively adopted by the powder industry.CN1374352A discloses " surface modification of brucite powder, wollastonite powder and method ", and this application adopts solid coupling agent stearic acid, aluminic acid ester and liquid coupling agent titanic acid ester, silane to the brucite powder modification.Owing to adopt single coupling agent, and use slow, the inefficient kneader of rotating speed as modified device, and handle powder at normal temperatures, thereby make modified effect not good enough, in addition, this patent does not report that activation index uses the data of back flame retardant resistance and mechanical property aspect plastics.
Summary of the invention
The objective of the invention is to provide with the high-purity water magnesite is raw material, adopts composite coupler, finishes the surface modification process on the continuous modification machine efficiently, makes the powder of making have the surface modifying method of the high a kind of natural brucite ultra thin powder of activation index.
Another object of the present invention is to provide ultrafine powder that above-mentioned surface modifying method makes when making plastics such as PE, PP, ABS, polycarbonate, the application method that flame retardant properties, mechanical property are obviously improved.
According to the foregoing invention purpose, the surface modifying method of natural brucite ultra thin powder of the present invention comprises the following steps:
1. natural brucite is carried out pre-treatment;
2. pretreated natural brucite is carried out fragmentation;
3. with step 2. the material of gained send into pulverizer and carry out grinding, the material fineness is 300～500 orders;
4. with step 3. the powder of gained send into micronizer mill and be ground to 1250～3000 orders;
5. with step 4. the gained powder on continous way surface modification machine, carry out activation modification and handle adding composite coupler under the anhydrous medium, temperature is 80～120 ℃, the treatment time is 15～30 minutes;
6. with 5. diffusing, the cooling of gained material economy-combat of step, make the natural brucite ultra thin powder that surface modification is crossed.
The step 5. composite coupler of described adding is made up of the solid silicon compound that accounts for powder weight 1%～3%, 1%～3% titanate coupling agent, the saturated hydrocarbon solvent that 2%～3% boiling point is higher than 200 ℃.
The halogen-free flame-retardance of the ultrafine powder that described surface modifying method makes when PE, PP, ABS, polycarbonate plastic application can reach the UL94V-0 level, the mechanical property excellence.
Compared with the prior art the present invention has following advantage:
(1) owing to adopts composite coupler that powder is carried out surface modification, carrying out modification with single coupling agent compares, make the natural brucite ultra thin powder activation index height of producing, when making product be used as fire retardant, flame retardant properties, mechanical property obviously improve, aspect the low-smoke non-halogen flame-retardant of plastics such as PE, PP, ABS, polycarbonate, use, demonstrate obvious advantage.
(2) owing to take on continous way surface modification machine, to carry out the activation modification processing, handle continuously, improved production efficiency greatly thereby make to produce.
(3) owing to take dry method that natural brucite ultra thin powder is carried out surface modification treatment, compare, saved filtration, drying and other steps, make production cost low with the wet method surface modification technology.
Embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment one:
The surface modifying method of natural brucite ultra thin powder of the present invention comprises the following steps:
1. the natural brucite with capacity carries out the picking pre-treatment, makes brucite material composition content: MgO 〉=66%, Fe
2O
3≤ 0.5%, SiO
2≤ 0.5%;
2. the pretreated natural brucite with capacity carries out Hubei Province formula crusher machine;
3. with step 2. the material of gained send into Raymond machine and carry out grinding, the material fineness is 325 orders;
4. with step 3. the powder of gained send into micronizer mill and grind carefully to 1250 orders;
5. get 4. gained powder 200kg of step, send on the continous way surface modification machine, 100 ℃ of preheating dehydrations, make powder be in no aqueous condition, add continuously solid silicon compound 6kg, atomizing sprays into the mixed solution that titanate coupling agent 6kg and 6kg boiling point are higher than 200 ℃ saturated hydrocarbon solvent continuously again, carries out the activation modification processing, temperature is controlled at 120 ℃, and the treatment time is 20 minutes;
6. with 5. diffusing, the cooling of gained material economy-combat of step, make the natural brucite ultra thin powder that surface modification is crossed, gained powder activation index is 99% after testing.
Get 100 parts and 100 parts PE of brucite ultrafine powder weight, 10 parts of phosphorus flame retardants, 6 parts of modifying agents of processing, 0.2 part in oxidation inhibitor that aforesaid method makes, mixing 8 minutes, temperature was controlled at 100 ℃; 130 ℃ of temperature, pressure is 12MPa state compressing tablet again.Product oxygen index after tested is 40%, and anti-to stretch intensity be 10MPa, and elongation at break is 120%, notched Izod impact strength 12kg/m
2
Embodiment two:
The surface modifying method of the natural brucite ultra thin powder of present embodiment comprises the following steps:
1. the natural brucite with capacity carries out the picking pre-treatment, makes brucite material composition content: MgO 〉=66%, Fe
2O
3≤ 0.5%, SiO
2≤ 0.5%;
2. the pretreated natural brucite with capacity carries out fragmentation;
3. with step 2. the material of gained send into pulverizer and carry out grinding, the material fineness is 500 orders;
4. with step 3. the powder of gained send into micronizer mill and be ground to 3000 orders;
5. get 4. gained powder 200kg of step, send on the continous way surface modification machine, 100 ℃ of thermal dehydrations, make powder be in no aqueous condition, add continuously solid silicon compound 2kg, atomizing sprays into the mixed solution that titanate coupling agent 2kg and 4kg boiling point are higher than 200 ℃ saturated hydrocarbon solvent continuously again, carries out the activation modification processing, temperature is controlled at 80 ℃, and the treatment time is 30 minutes;
6. with 5. diffusing, the cooling of gained material economy-combat of step, make the natural brucite ultra thin powder that surface modification is crossed, gained powder activation index is 98% after testing.
Get 80 parts and 100 parts PP of brucite ultrafine powder weight, 8 parts of phosphorus flame retardants, 7 parts of modifying agents of processing, 0.3 part in oxidation inhibitor that aforesaid method makes, mixing 10 minutes, temperature was controlled at 150 ℃; 190 ℃ of temperature, pressure is 12MPa state compressing tablet again.Product oxygen index after tested is 33%, and anti-to stretch intensity be 20MPa, and elongation at break is 40%, notched Izod impact strength 28kg/m
2
In sum, the ultrafine powder that surface modifying method of the present invention makes, when using on PE, PP, ABS, polycarbonate plastic, halogen-free flame-retardance can reach the UL94V-0 level, and mechanical property is obviously excellent.
Claims (3)
1, the surface modifying method of natural brucite ultra thin powder is characterized in that: comprise the following steps:
1. natural brucite is carried out pre-treatment;
2. pretreated natural brucite is carried out fragmentation;
3. with step 2. the material of gained send into pulverizer and carry out grinding, the material fineness is 300～500 orders;
4. with step 3. the powder of gained send into micronizer mill and be ground to 1250～3000 orders;
5. with step 4. the gained powder on continous way surface modification machine, carry out activation modification and handle adding composite coupler under the anhydrous medium, temperature is 80～120 ℃, the treatment time is 15～30 minutes;
6. with 5. diffusing, the cooling of gained material economy-combat of step, make the natural brucite ultra thin powder that surface modification is crossed.
2, the surface modifying method of natural brucite ultra thin powder as claimed in claim 1 is characterized in that: the step 5. composite coupler of described adding is made up of the solid silicon compound that accounts for powder weight 1%～3%, 1%～3% titanate coupling agent, the saturated hydrocarbon solvent that 2%～3% boiling point is higher than 200 ℃.
3, the application of surface modifying method gained powder according to claim 1 is characterized in that: the halogen-free flame-retardance of the ultrafine powder that makes when PE, PP, ABS, polycarbonate plastic application can reach the UL94V-0 level, the mechanical property excellence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610039737 CN101054482A (en) | 2006-04-14 | 2006-04-14 | Surface modifying method for natural brucite ultra thin powder and application thereof |
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|---|---|---|---|
| CN 200610039737 CN101054482A (en) | 2006-04-14 | 2006-04-14 | Surface modifying method for natural brucite ultra thin powder and application thereof |
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|---|---|
| CN101054482A true CN101054482A (en) | 2007-10-17 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538419B (en) * | 2009-04-09 | 2012-07-04 | 池州灵芝化建材料科技有限公司 | Process for preparing brucite inorganic flame retardant |
| CN103265826A (en) * | 2013-06-13 | 2013-08-28 | 苏州新区华士达工程塑胶有限公司 | Inorganic flame retardant surface modification method |
| CN103923491A (en) * | 2014-04-11 | 2014-07-16 | 河北科技大学 | Special magnesium oxide for glass reinforced plastics produced with unsaturated polyester resins and preparation method thereof |
| CN105037810A (en) * | 2015-07-23 | 2015-11-11 | 北京理工大学 | Method for preparing alginate modified brucite composite flame retardant |
| CN105733089A (en) * | 2014-12-06 | 2016-07-06 | 沈阳工业大学 | Brucite composite flame-retardant polypropylene material and preparation method thereof |
| CN106543773A (en) * | 2016-11-01 | 2017-03-29 | 蚌埠硅基材料产业技术研究院有限公司 | The scale surface treatment method of the superfine quartz powder of median≤2 μm |
| CN106829994A (en) * | 2017-03-09 | 2017-06-13 | 金华市欣生沸石开发有限公司 | Zeolite powder production line and production technology |
| CN112300602A (en) * | 2020-10-29 | 2021-02-02 | 北京化工大学 | Modification method of inorganic filler |
-
2006
- 2006-04-14 CN CN 200610039737 patent/CN101054482A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538419B (en) * | 2009-04-09 | 2012-07-04 | 池州灵芝化建材料科技有限公司 | Process for preparing brucite inorganic flame retardant |
| CN103265826A (en) * | 2013-06-13 | 2013-08-28 | 苏州新区华士达工程塑胶有限公司 | Inorganic flame retardant surface modification method |
| CN103923491A (en) * | 2014-04-11 | 2014-07-16 | 河北科技大学 | Special magnesium oxide for glass reinforced plastics produced with unsaturated polyester resins and preparation method thereof |
| CN103923491B (en) * | 2014-04-11 | 2016-08-17 | 河北科技大学 | A kind of unsaturated polyester resin produces fiberglass special magnesium oxide and preparation method thereof |
| CN105733089A (en) * | 2014-12-06 | 2016-07-06 | 沈阳工业大学 | Brucite composite flame-retardant polypropylene material and preparation method thereof |
| CN105037810A (en) * | 2015-07-23 | 2015-11-11 | 北京理工大学 | Method for preparing alginate modified brucite composite flame retardant |
| CN105037810B (en) * | 2015-07-23 | 2017-08-22 | 北京理工大学 | A kind of alginate is modified the preparation method of shepardite composite flame-retardant agent |
| CN106543773A (en) * | 2016-11-01 | 2017-03-29 | 蚌埠硅基材料产业技术研究院有限公司 | The scale surface treatment method of the superfine quartz powder of median≤2 μm |
| CN106829994A (en) * | 2017-03-09 | 2017-06-13 | 金华市欣生沸石开发有限公司 | Zeolite powder production line and production technology |
| CN106829994B (en) * | 2017-03-09 | 2019-05-28 | 金华市欣生沸石开发有限公司 | Zeolite powder production line and production technology |
| CN112300602A (en) * | 2020-10-29 | 2021-02-02 | 北京化工大学 | Modification method of inorganic filler |
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