CN110194852A - A kind of modified magnesium hydroxide, surface modifying method and application - Google Patents
A kind of modified magnesium hydroxide, surface modifying method and application Download PDFInfo
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- CN110194852A CN110194852A CN201810163598.4A CN201810163598A CN110194852A CN 110194852 A CN110194852 A CN 110194852A CN 201810163598 A CN201810163598 A CN 201810163598A CN 110194852 A CN110194852 A CN 110194852A
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Abstract
The present invention discloses a kind of modified magnesium hydroxide, surface modifying method and application, and the surface modifying method is configured to the magnesium hydroxide slurry that solid content is 10-25% comprising steps of magnesium hydroxide raw material is added to the water；It is added in the magnesium hydroxide slurry for improving the surface modifier and abrasive media of anti-flammability and elongation, and is ground and reacted；After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.Method of modifying of the present invention, required equipment and simple process, production cost are low, can be widely used in industrial processes.After method of modifying of the present invention is modified, the oxygen index (OI) of flame-retardant polymer is significantly improved simultaneously with elongation, and reduces its influence to polymer product processing performance, realizes the optimization and balance of material processability and toughness.
Description
Technical field
The present invention relates to chemical material field more particularly to a kind of modified magnesium hydroxides, surface modifying method and application.
Background technique
In recent years, greatly developing with engineerings such as China's 4G network, urban track traffic, railway, building construction, it is mobile
Communication is steeply risen with the demand of the radio-frequency cables such as radio frequency (RF) cable, leaky cable, railway signal cable, promotes low smoke and zero halogen
The usage amount of fire-resistant cable material increases rapidly, and requirement of the people to wire and cable product safety environmental-protecting performance is higher and higher.Tradition
Halogen cable material a large amount of toxic hydrogen halides can be discharged in burning, to the life security and Architectural Equipment of personnel
It damages, uses and be also increasingly subject to limit.The correlative study of environmentally protective low-smoke halide-free fireproof composite polyolefine material is increasingly
It is taken seriously.
As a kind of common halogen-free flame retardants, magnesium hydroxide is because of extensive, the cheap, thermal stability with raw material sources
It is good, non-volatile, be not precipitated, do not generate toxic gas, do not corrode process equipment and suppression cigarette effect it is obvious many advantages, such as and it is standby
It is concerned.Its major defect is that the lower and compatibility with matrix resin of flame retarding efficiency is poor, to make flame-retardant polymer material
The flame retardant property of material reaches certain requirement, and additive amount must usually reach 60% or more of flame-retardant polymer material gross mass, this
Sample certainly will will cause the deterioration of polymer composites mechanical mechanics property, it is therefore desirable to be modified to magnesium hydroxide.
But currently, existing modified magnesium hydroxide is applied in polyolefine material, obtained flame-proofed polymer material is main
It is that mechanical property obtains improving or flame retardant property is improved, can not combines, that is to say, that obtained fire-retardant polymerization
The possible oxygen index (OI) of object is very high but elongation is very low or elongation is very high but oxygen index (OI) is very low.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of modified magnesium hydroxide, surface are modified
Method and application, it is intended to solve the problems, such as that existing method of modifying can not improve the anti-flammability and elongation of flame-retardant polymer simultaneously.
Technical scheme is as follows:
A kind of surface modifying method of magnesium hydroxide comprising step:
Magnesium hydroxide raw material is added to the water, the magnesium hydroxide slurry that solid content is 10-25% is configured to；
The surface modifier and abrasive media for improving anti-flammability and elongation are added in the magnesium hydroxide slurry, goes forward side by side
Row grinding and reaction；
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
Preferably, the surface modifier is to be made of component A, component B and organic solvent, wherein the component A is
The one or two of γ-(acetyl oxygen propyl group) trimethoxy silane or γ-(methacryloxypropyl) propyl trimethoxy silicane, institute
State one kind that component B is 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide or bis- (4- carboxyl phenyl) phenyl phosphine oxides
Or two kinds.
Preferably, it counts in mass ratio, the component A is the 0.5-3% of the magnesium hydroxide raw material；The component B is described
The 0.5-3% of magnesium hydroxide raw material.
Preferably, it counts in mass ratio, the component A adds the sum of component B and the ratio of organic solvent to be 50-60:50-40.
Preferably, the organic solvent is ethyl alcohol.
Preferably, reaction time 50-70min.
Preferably, reaction temperature is 70-90 DEG C.
A kind of modified magnesium hydroxide is obtained by above-mentioned method of modifying modification.
A kind of application of modified magnesium hydroxide, wherein be applied to prepare by modified magnesium hydroxide as described above fire-retardant poly-
Close object.
The application of the modified magnesium hydroxide, wherein the preparation process of the flame-retardant polymer includes:
Polyolefin, compatilizer are first blended, modified magnesium hydroxide is added after melting and antioxidant is blended to obtain fire-retardant gather
Object is closed, the polyolefin is one or more of ethylene-vinyl acetate copolymer, polyethylene or ethylene-octene；The phase
Holding agent is the one or more that maleic anhydride is grafted or maleic anhydride is grafted；The antioxidant is 1010,168, DLTDP, 412S
One or more of Deng.
The utility model has the advantages that method of modifying provided by the invention, required equipment and simple process, production cost are low, can be widely
Applied in industrial processes.The modified obtained modification hydrogen-oxygen in surface is carried out by surface modifying method of the present invention
Change the preparation that magnesium is used for flame-retardant polymer, the oxygen index (OI) of obtained flame-retardant polymer is significantly mentioned simultaneously with elongation
Height, and its influence to polymer product processing performance is reduced, realize the optimization and balance of material processability and toughness.
Specific embodiment
The present invention provides a kind of modified magnesium hydroxide, surface modifying method and application, to make the purpose of the present invention, technical side
Case and effect are clearer, clear, and the present invention is described in more detail below.It should be appreciated that specific reality described herein
It applies example to be only used to explain the present invention, be not intended to limit the present invention.
A kind of surface modifying method of magnesium hydroxide provided by the present invention comprising step:
Magnesium hydroxide raw material is added to the water, the magnesium hydroxide slurry that solid content is 10-25% is configured to；
The surface modifier and abrasive media for improving anti-flammability and elongation are added in the magnesium hydroxide slurry, goes forward side by side
Row grinding and reaction；
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
The present invention is modified magnesium hydroxide using surface modifier, and the polarity of obtained modified magnesium hydroxide is dropped
It is low, modified magnesium hydroxide is applied in the preparation of flame-retardant polymer, while improving the oxygen index (OI) of flame-retardant polymer and stretching
Long rate.Simple production process of the present invention, low energy consumption, can be widely used in industrial production.
The solid content is the mass percent that remainder accounts for total amount after lotion or coating are dried under prescribed conditions.This
The magnesium hydroxide slurry solid content that invention is prepared is 10 ~ 25%, which is conducive to come into full contact with surface modifier and instead
It answers, improves reaction efficiency.In order to disperse magnesium hydroxide raw material adequately, specifically magnesium hydroxide raw material first can be poured into container
In, it is constantly stirred while adding distilled water, so that magnesium hydroxide raw material adequately disperses.
Preferably, the surface modifier is made of component A, component B and organic solvent, wherein the component A is γ-
The one or two of (acetyl oxygen propyl group) trimethoxy silane or γ-(methacryloxypropyl) propyl trimethoxy silicane, it is described
Component B be 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide or bis- (4- carboxyl phenyl) phenyl phosphine oxides one kind or
Two kinds.When component A, component B and organic solvent are mixed, three can be added to be stirred in container and stirred
It mixes, it is preferred that the time of stirring is 15min, is adequately mixed in this way, being conducive to three.
Preferably, it counts in mass ratio, the component A is the 0.5-3% of the magnesium hydroxide raw material；The component B is described
The 0.5-3% of magnesium hydroxide raw material.It counts in mass ratio, the component A adds the sum of component B and the ratio of organic solvent to be 50-60:
50-40.It enables to the surface modifier sufficiently to react with the magnesium hydroxide raw material in this way, improves reaction rate.
Preferably, the organic solvent is ethyl alcohol.The organic solvent is to dissolve some organic compounds not soluble in water
Object, for example, dissolution acetone etc..
Preferably, the magnesium hydroxide raw material is natural crystal method magnesium hydroxide or chemical synthesis magnesium hydroxide.The day
Right ore method magnesium hydroxide is the magnesium hydroxide prepared by ore method, and the chemical synthesis magnesium hydroxide is i.e. by chemical synthesis legal system
Standby magnesium hydroxide.Preferably, it is ground and is reacted in circulating agitating ball mill, i.e., in the circulating stirring ball-milling
The griding reaction of raw material is carried out in machine.Before griding reaction, abrasive media and surface modifier are added into magnesium hydroxide slurry.
The abrasive media is by the impact force of itself and abrasive power in circulating agitating ball mill by the energy carrier of crushing material.It is described
Abrasive media can be ball medium either stick medium, for example, making the ball medium that synthesizes, the stick being made of ceramic by alloy
Medium, currently preferred is using ball medium.
Preferably, reaction time 50-70min, such as specially 55min.Preferably, reaction temperature is 70-90 DEG C, example
It is such as specially 75 DEG C.Component A adds the sum of component B and the ratio of organic solvent to be 50-60:50-40, such as specially 50:50.With
Just it reacts more sufficiently, improves reaction efficiency.
Embodiment 1:
Magnesium hydroxide raw material (chemical method synthesis) is added to the water, the magnesium hydroxide slurry that solid content is 10% is configured to；
The surface modifier being added in the magnesium hydroxide slurry are as follows: γ-(acetyl oxygen propyl group) trimethoxy silane, 10- bis-
The mixture of hydrogen -9- oxa- -10- phospho hetero phenanthrene -10- oxide and ethyl alcohol, while abrasive media is added, and carry out grinding and anti-
It answers；It counts in mass ratio, γ-(acetyl oxygen propyl group) the trimethoxy silane additive amount is the 0.25% of magnesium hydroxide；The 10-
Miscellaneous -10- phospho hetero phenanthrene -10- the oxide of dihydro-9-oxy is the 0.4% of magnesium hydroxide；The additive amount and 10- dihydro -9- of the ethyl alcohol
The ratio for the sum that oxa- -10- phospho hetero phenanthrene -10- oxide is added with γ-(acetyl oxygen propyl group) trimethoxy silane are as follows: 50:50；
Reaction time is 55min；Answering temperature is 75 DEG C.
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
Embodiment 2:
Magnesium hydroxide raw material (chemical method synthesis) is added to the water, the magnesium hydroxide slurry that solid content is 25% is configured to；
The surface modifier being added in the magnesium hydroxide slurry are as follows: γ-(methacryloxypropyl) propyl trimethoxy silicane,
The mixture of 10- dihydro-9-oxy miscellaneous -10- phospho hetero phenanthrene -10- oxide and ethyl alcohol, while abrasive media is added, and ground
And reaction；It counts in mass ratio, γ-(methacryloxypropyl) the propyl trimethoxy silicane additive amount is magnesium hydroxide
0.65%；Miscellaneous -10- phospho hetero phenanthrene -10- the oxide of 10- dihydro-9-oxy is the 0.90% of magnesium hydroxide；The addition of the ethyl alcohol
Amount and the miscellaneous -10- phospho hetero phenanthrene -10- oxide of 10- dihydro-9-oxy are added with γ-(methacryloxypropyl) propyl trimethoxy silicane
Sum ratio are as follows: 55:45；Reaction time is 60min；Reaction temperature is 70 DEG C.
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
Embodiment 3:
Magnesium hydroxide raw material (chemical method synthesis) is added to the water, the magnesium hydroxide slurry that solid content is 15% is configured to；
The surface modifier being added in the magnesium hydroxide slurry are as follows: γ-(acetyl oxygen propyl group) trimethoxy silane, bis- (4-
Carboxyl phenyl) phenyl phosphine oxide and ethyl alcohol mixture, while abrasive media is added, and ground and reacted；In mass ratio
Meter, γ-(acetyl oxygen propyl group) the trimethoxy silane additive amount are the 1.3% of magnesium hydroxide；Bis- (4- carboxyl phenyl) benzene
Base phosphine oxide is the 0.65% of magnesium hydroxide；The additive amount of the ethyl alcohol and γ-(acetyl oxygen propyl group) trimethoxy silane and pair
The ratio for the sum that (4- carboxyl phenyl) phenyl phosphine oxide is added are as follows: 53:47；Reaction time is 50min；Reaction temperature is 85 DEG C.
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
Embodiment 4:
Magnesium hydroxide raw material (chemical method synthesis) is added to the water, the magnesium hydroxide slurry that solid content is 20% is configured to；
The surface modifier being added in the magnesium hydroxide slurry are as follows: γ-(methacryloxypropyl) propyl trimethoxy silicane,
The mixture of bis- (4- carboxyl phenyl) phenyl phosphine oxides and ethyl alcohol, while abrasive media is added, it counts in mass ratio, the γ-(first
Base acryloyl-oxy) propyl trimethoxy silicane additive amount be magnesium hydroxide 1.85%；Bis- (4- carboxyl phenyl) phenyl oxygen
Change 1.65% that phosphine is magnesium hydroxide；The additive amount of the ethyl alcohol and γ-(methacryloxypropyl) propyl trimethoxy silicane and pair
The ratio for the sum that (4- carboxyl phenyl) phenyl phosphine oxide is added are as follows: 60:40；Reaction time is 60min；Reaction temperature is 80 DEG C.
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
Embodiment 5:
Magnesium hydroxide raw material (chemical method synthesis) is added to the water, the magnesium hydroxide slurry that solid content is 18% is configured to；
The surface modifier being added in the magnesium hydroxide slurry are as follows: γ-(acetyl oxygen propyl group) trimethoxy silane, 9,10-
Miscellaneous -10- phospho hetero phenanthrene -10- the oxide of dihydro-9-oxy and ethyl alcohol, while abrasive media is added, and ground and reacted；By matter
For amount than meter, γ-(acetyl oxygen propyl group) the trimethoxy silane quality is the 1.3% of magnesium hydroxide；9, the 10- dihydro-9-oxy
The quality of miscellaneous -10- phospho hetero phenanthrene -10- oxide is the 2.5% of magnesium hydroxide；The additive amount and γ-(methacryl of the ethyl alcohol
Oxygen) propyl trimethoxy silicane 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide be added sum ratio are as follows: 50:
50；Reaction time is 60min；Reaction temperature is 82 DEG C.
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
Embodiment 6:
Magnesium hydroxide raw material (synthesis of natural minerals stone method) is added to the water, the magnesium hydroxide slurry that solid content is 24% is configured to；
The surface modifier being added in the magnesium hydroxide slurry are as follows: γ-(acetyl oxygen propyl group) trimethoxy silane, bis- (4-
Carboxyl phenyl) phenyl phosphine oxide and ethyl alcohol, while abrasive media is added, and ground and reacted；It counts in mass ratio, it is described
γ-(acetyl oxygen propyl group) trimethoxy silane is the 1.6% of magnesium hydroxide；The matter of bis- (4- carboxyl phenyl) phenyl phosphine oxides
Measure 1.3% that summation is magnesium hydroxide；The additive amount of the ethyl alcohol and γ-(methacryloxypropyl) propyl trimethoxy silicane and
The ratio for the sum that bis- (4- carboxyl phenyl) phenyl phosphine oxides are added are as follows: 55:45；Reaction time is 65min；Reaction temperature is 85
℃。
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
Embodiment 7
Magnesium hydroxide raw material (synthesis of natural minerals stone method) is added to the water, the magnesium hydroxide slurry that solid content is 12% is configured to；
The surface modifier being added in the magnesium hydroxide slurry are as follows: γ-(acetyl oxygen propyl group) trimethoxy silane, bis- (4-
Carboxyl phenyl) phenyl phosphine oxide and ethyl alcohol, while abrasive media is added, and ground and reacted；It counts in mass ratio, it is described
γ-(acetyl oxygen propyl group) trimethoxy silane is the 2.1% of magnesium hydroxide；The matter of bis- (4- carboxyl phenyl) phenyl phosphine oxides
Measure 2% that summation is magnesium hydroxide；The additive amount of the ethyl alcohol and γ-(methacryloxypropyl) propyl trimethoxy silicane and pair
The ratio for the sum that (4- carboxyl phenyl) phenyl phosphine oxide is added are as follows: 50:50；Reaction time is 55min；Reaction temperature is 75 DEG C.
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
Embodiment 8
Magnesium hydroxide raw material (chemical method synthesis) is added to the water, the magnesium hydroxide slurry that solid content is 17% is configured to；
The surface modifier being added in the magnesium hydroxide slurry are as follows: γ-(acetyl oxygen propyl group) trimethoxy silane, γ-(first
Base acryloyl-oxy) propyl trimethoxy silicane, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, bis- (4- carboxyl benzene
Base) phenyl phosphine oxide and ethyl alcohol, while abrasive media is added, and ground and reacted；It counts in mass ratio, the γ-(acetyl
Oxygen propyl group) the quality summation of trimethoxy silane and γ-(methacryloxypropyl) propyl trimethoxy silicane is magnesium hydroxide
3.0%；The quality of the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and bis- (4- carboxyl phenyl) phenyl phosphine oxides
Summation is the 3.0% of magnesium hydroxide；The additive amount and γ-(methacryloxypropyl) propyl trimethoxy silicane, γ-of the ethyl alcohol
(methacryloxypropyl) propyl trimethoxy silicane, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and bis- (4- carboxylics
Base phenyl) phenyl phosphine oxide be added sum ratio are as follows: 60:40；Reaction time is 65min；Reaction temperature is 85 DEG C.
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
Embodiment 9
Magnesium hydroxide raw material (synthesis of natural crystal method) is added to the water, the magnesium hydroxide slurry that solid content is 13% is configured to；
The surface modifier being added in the magnesium hydroxide slurry are as follows: γ-(acetyl oxygen propyl group) trimethoxy silane, γ-(first
Base acryloyl-oxy) propyl trimethoxy silicane, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, bis- (4- carboxyl benzene
Base) phenyl phosphine oxide and ethyl alcohol, while abrasive media is added, and ground and reacted；It counts in mass ratio, the γ-(acetyl
Oxygen propyl group) the quality summation of trimethoxy silane and γ-(methacryloxypropyl) propyl trimethoxy silicane is magnesium hydroxide
2.08%；The matter of the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and bis- (4- carboxyl phenyl) phenyl phosphine oxides
Measure 1.59% that summation is magnesium hydroxide；The additive amount and γ-(methacryloxypropyl) propyl trimethoxy silicane of the ethyl alcohol,
γ-(methacryloxypropyl) propyl trimethoxy silicane, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and bis- (4-
Carboxyl phenyl) phenyl phosphine oxide be added sum ratio are as follows: 60:40；Reaction time is 56min；Reaction temperature is 77 DEG C.
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes
The present invention also provides a kind of modified magnesium hydroxides, and method of modifying modification as described above is used to obtain.
The present invention also provides a kind of applications of modified magnesium hydroxide, and modified magnesium hydroxide as described above is applied to preparation
Flame-retardant polymer.
Further, the preparation process of the flame-retardant polymer includes:
Polyolefin, compatilizer are first blended, modified magnesium hydroxide is added after melting and antioxidant is blended to obtain fire-retardant gather
Close object.
The processing of flame-retardant polymer: according to the ratio (being mass ratio) in table 1- table 2, by polyolefin and compatilizer
(both for resin) is first added in torque rheometer and is blended, and is added after resin melting fire retardant (modified magnesium hydroxide) and anti-
Oxygen agent (both for powder) be blended, the blendings time be 15min, 155 DEG C of blending temperature, revolving speed 45r/min, subsequent embodiment
Prepared by this condition.
Polyolefin therein is ethylene-vinyl acetate copolymer (EVA), linear low density polyethylene (LLDPE) or second
One or more of alkene-octene copolymer (POE).Polyolefin employed in the embodiment of the present invention is the mixed of EVA and POE
Object is closed, the two mass ratio is 1:1.That is, in embodiments of the present invention, ethylene-vinyl acetate copolymer uses the U.S.
The EVA265 of E.I.Du Pont Company.Ethylene-octene copolymer uses the Engage 8200 of Dow Chemical Company.
Compatilizer therein is one kind that maleic anhydride is grafted EVA or maleic anhydride is grafted PE.The phase of the embodiment of the present invention
Hold agent using the MC226 or MC218-1 of the light new material limited liability company of Ningbo energy.
Antioxidant therein is 1010,168, one or more of DLTDP, 412S etc..It is used in the embodiment of the present invention
Antioxidant be 1010.
Wherein 1010 refer to four [methyl-β-(3,5- di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol esters, are
A kind of antioxidant of good performance, have it is nontoxic, nonflammable, not burn into do not pollute, the excellent properties such as odorless, and it is most of
Polymer compatibility it is good, having good prevents discoloration caused by light and heat.There is brilliant antioxygen to polypropylene, polyethylene
Change performance, and be suitble to apply under high temperature, there is excellent heat resistanceheat resistant oxygen performance.
Wherein 168 be low volatility organic synthesis resistance to the oxygen inhibiting polymerization agent, is widely used in polypropylene, polyethylene, ABS, poly- carbonic acid
The synthesis and processing of all types of plastic such as fiber and polyester resin.It is a kind of phosphite ester antioxidant, and and primary antioxidant
1010 and 1076 etc. and the used time have fabulous synergistic effect.Wherein DLTDP, its chemical name is the double lauryl alcohols of thio-2 acid
Ester, molecular weight 514.86.Auxiliary antioxidant as the adhesives such as the resins such as ABS, PVC and natural rubber and synthetic rubber, it is right
Hydroperoxides have decomposition.With phenolic antioxidant (such as 264,1010,1076, CA) and ultraviolet absorbing agent and apparatus is assisted
Same effect.
Wherein 412S refers to antioxidant TH-412S.
The condition of tabletting is as follows: preheating 5min, hot pressing 5min, cooling 8min, wherein pelletizing temperature is 165 DEG C, when preheating
Tableting pressure be 2MPa, tableting pressure when hot pressing is 10 MPa.
Stretching experiment: standard GB/T 1040-2006, rate of extension 250mm/min.
Oxygen index test method: reference standard GB/T 2046-2009.
Table 1
In upper table 1, magnesium hydroxide A is to be made of chemical method and obtain without surface modification or other method of modifying
Magnesium hydroxide；The 1 obtained modified magnesium hydroxide through the foregoing embodiment of magnesium hydroxide 1, magnesium hydroxide 2 is through the foregoing embodiment
2 obtained modified magnesium hydroxides；The 3 obtained modified magnesium hydroxide through the foregoing embodiment of magnesium hydroxide 3；Magnesium hydroxide 4 passes through
Above-described embodiment 4 obtains；The 5 obtained modified magnesium hydroxide through the foregoing embodiment of magnesium hydroxide 5.
Table 2
| Formula | % | % | % | % |
| EVA 265 | 31.8 | 31.8 | 31.8 | 31.8 |
| Engage 8200 | 4 | 4 | 4 | 4 |
| MC218-1 | 4 | 4 | 4 | 4 |
| 1010 | 0.2 | 0.2 | 0.2 | 0.2 |
| Magnesium hydroxide B | 60 | - | - | - |
| Magnesium hydroxide 6 | - | 60 | - | - |
| Magnesium hydroxide C | - | - | 60 | - |
| Magnesium hydroxide 7 | - | - | - | 60 |
| Total amount, % | 100 | 100 | 100 | 100 |
| Torque, Nm is blended | 35.2 | 24.2 | 28.4 | 19.1 |
| Tensile strength, MPa | 12.1 | 6.7 | 11.2 | 5.1 |
| Elongation at break, % | 230 | 554 | 100 | 427 |
| Oxygen index (OI), % | 37 | 52 | 35 | 45 |
In upper table 2, magnesium hydroxide B be made of chemical method and without surface modifying method provided by the invention it is modified or
The magnesium hydroxide that person is obtained by other method of modifying；The 6 obtained modified magnesium hydroxide through the foregoing embodiment of magnesium hydroxide 6,
Magnesium hydroxide C is that natural minerals are made and are modified without surface modifying method modification provided by the invention or by other
The magnesium hydroxide that method obtains；The 7 obtained modified magnesium hydroxide through the foregoing embodiment of magnesium hydroxide 7.
Experiment, which is compared, to be shown
For table 1: compared with without magnesium hydroxide A that is modified or being modified by other method of modifying, passing through
Magnesium hydroxide 2, magnesium hydroxide 3, magnesium hydroxide 4 and the magnesium hydroxide 5 that surface modifying method provided by the invention obtains are applied
When the preparation of flame-retardant polymer, the extensibility and oxygen index (OI) of obtained flame-retardant polymer are improved simultaneously, also, work as group
When the dosage of part A is 1.3% and the dosage of component B is 0.65%, the system that modified magnesium hydroxide 3 will be obtained is used for flame-retardant polymer
It is standby, at this point, the oxygen index (OI) of obtained flame-retardant polymer and elongation reach maximum.The surface modification side provided through the invention
When the magnesium hydroxide 1 that method obtains is applied to the preparation of flame-retardant polymer, the extensibility and oxygen index (OI) of obtained flame-retardant polymer
Improve it is unobvious because its surface modifier is not up to certain dosage.For table 2: method provided by the invention can not only be to change
The magnesium hydroxide for learning synthesis carries out surface and is modified, while it is modified that magnesium hydroxide progress surface can be also obtained to natural crystal method.And
And when modified magnesium hydroxide is used for the preparation of flame-retardant polymer, it can improve the elongation of flame-retardant polymer and oxygen refers to
Number.
In conclusion method of modifying of the present invention, required equipment and simple process, production cost are low, can be widely
Applied in industrial processes.The modified magnesium hydroxide obtained after method of modifying of the present invention is modified by its
It is used to prepare flame-retardant polymer, the flame retardant property of obtained flame-retardant polymer is improved simultaneously with extensibility.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of surface modifying method of magnesium hydroxide, which is characterized in that comprising steps of
Magnesium hydroxide raw material is added to the water, the magnesium hydroxide slurry that solid content is 10-25% is configured to；
The surface modifier and abrasive media for improving anti-flammability and elongation are added in the magnesium hydroxide slurry, goes forward side by side
Row grinding and reaction；
After the reaction was completed, obtained modified magnesium hydroxide is separated with abrasive media, refilters, dries, crushes.
2. the method for modifying of magnesium hydroxide according to claim 1, which is characterized in that the surface modifier by component A,
Component B and organic solvent composition, the component A are γ-(acetyl oxygen propyl group) trimethoxy silane or γ-(methacryloxypropyl)
The one or two of propyl trimethoxy silicane, the component B are 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide
Or the one or two of bis- (4- carboxyl phenyl) phenyl phosphine oxides.
3. the surface modifying method of magnesium hydroxide according to claim 2, which is characterized in that count in mass ratio, described group
Part A is the 0.5-3% of the magnesium hydroxide raw material；The component B is the 0.5-3% of the magnesium hydroxide raw material.
4. the surface modifying method of magnesium hydroxide according to claim 2, which is characterized in that count in mass ratio, described group
Part A adds the sum of component B and the ratio of organic solvent to be 50-60:50-40.
5. the surface modifying method of magnesium hydroxide according to claim 2, which is characterized in that the organic solvent is second
Alcohol.
6. the method for modifying of magnesium hydroxide according to claim 1, which is characterized in that reaction time 50-70min.
7. the method for modifying of magnesium hydroxide according to claim 1, which is characterized in that reaction temperature is 70-90 DEG C.
8. a kind of modified magnesium hydroxide, which is characterized in that modified using method of modifying as claimed in any one of claims 1 to 7
It arrives.
9. a kind of application of modified magnesium hydroxide, which is characterized in that modified magnesium hydroxide as claimed in claim 8 to be applied to
Prepare flame-retardant polymer.
10. the application of modified magnesium hydroxide according to claim 9, which is characterized in that the preparation of the flame-retardant polymer
Process includes:
Polyolefin, compatilizer are first blended, modified magnesium hydroxide is added after melting and antioxidant is blended to obtain fire-retardant gather
Object is closed, the polyolefin is one or more of ethylene-vinyl acetate co-polymer, polyethylene or ethylene-octene；It is described
Compatilizer is the one or more that maleic anhydride is grafted or maleic anhydride is grafted；The antioxidant be 1010,168, DLTDP,
One or more of 412S etc..
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