CN108997617A - A kind of preparation and its application method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant - Google Patents
A kind of preparation and its application method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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Abstract
The present invention discloses a kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, including following operating procedure: (1) after mixing disodium phosphate soln with sodium dihydrogen phosphate, buffer is made；(2) red phosphorus combustion inhibitor, dopamine, oleic acid rare earth are added into buffer, after magnetic agitation, vacuum filtration, obtain a strata dopamine encapsulated red phosphorus；(3) it will repeat the above steps, and obtain three strata dopamine encapsulated red phosphorus, 200 meshes are crossed after being baked to, grinding, obtain poly-dopamine encapsulated red phosphorus microcapsule flame retardant.The present invention carries out three layers of cladding to red phosphorus combustion inhibitor using poly-dopamine, the water resistance of red phosphorus combustion inhibitor can effectively be promoted, promote its compatibility between polymer, and then it ensure that every mechanical property of flame-retarded resin, poly-dopamine can also generate phosphorus-nitrogen cooperative flame retardant with red phosphorus combustion inhibitor simultaneously, and anti-flammability, thermal stability are more excellent.
Description
Technical field
The invention belongs to technical field of flame retardant, and in particular to a kind of system of poly-dopamine encapsulated red phosphorus microcapsule flame retardant
Standby and its application method.
Background technique
With the rapid development of our country's economy, all with high molecular material, every profession and trade can all apply to thermosetting property in the whole world
Resin.Unsaturated polyurethane resin is liked because its function is very powerful by many people as thermosetting plastics.Unsaturation is poly-
There is the performance of extraordinary physics, chemical aspect after urethane resin solidification, adhesive strength and flexility are in metal and Fei Jin
The surface for belonging to material shows very good, also can be very high in terms of hardness, and dielectric properties are excellent, and set shrinking percentage is small, product ruler
Very little size is also special to be stablized, and to alkali and most of solvent-stable, it can resist chemical attack, thus raw in national defence and other industry
It is widely used in production.But this quasi polymer belongs to heat-sensitive substance, inflammability is one of its major defect, leads to fire
Harmfulness can also greatly increase, and limit its application.In order to prevent and reduce fire damage, there is a highly effective measure just
It is to be acted in daily life and production material using fire proofing.The use of fire proofing can manufacture better condition and go
Effectively puts out in initial fire disaster and be minimized the loss of fire.Therefore, the anti-flammability of unsaturated-resin is improved by more
Carry out the concern of more researchers.
The shortcomings that traditional fire retardant is to only require, and substance can not be blazed up, halogenated flame retardant or halogen containing flame-retardant
The flame-retardant mixture being composed is to consider to use first in material.It is fire-retardant that halogenated flame retardant, which has a very big advantage,
Effect is good, but has following various disadvantages: first is that it can release a large amount of cigarette when burning, and second is the halogenation released
Hydrogen has corrosivity powerful.The excellent heat stability of inorganic fire retardants can inhibit the generation of cigarette, in endothermic decomposition very well
In harmful gas it is also considerably less and at low cost.But when being added in flame-retardant system, the amount of addition is larger, while its
The effect compatible with organic substance be not it is very good, the mechanical property of product is also subject to seriously affects simultaneously, so people are to nothing
The usage amount of machine fire retardant is also gradually reducing.
Red phosphorus (RP) fire retardant is a kind of fire retardant using red phosphorus as representative, is a kind of purplish red or slightly browny amorphous
Powder is organic halogen-free agent, has excellent thermal stability, and fixedness does not generate corrosive gas, flame retardant effect
Well, the advantages that the features such as electrical insulating property is good, in use without toxicity risk, additive amount is few, does not dissolve, and fusing point is high.But
Be its weakness be red phosphorus processing characteristics it is poor, and the compatibility of resin is also not so good, material mechanical performance of processing and fabricating
It is very poor.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of preparations of poly-dopamine encapsulated red phosphorus microcapsule flame retardant
And its application method.
The present invention is achieved by the following technical solutions.
A kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, including following operating procedure:
(1) molten with sodium hydroxide solution or potassium hydroxide after mixing disodium phosphate soln with sodium dihydrogen phosphate
Any one of liquid adjusts its pH value to 8-9, and buffer is made；
(2) by weight, 5-9 parts of red phosphorus combustion inhibitors, 0.3-0.6 parts of dopamines, 0.5-1.0 parts of oleic acid rare earths are added
Into 950-1000 portions of buffers, magnetic agitation reacts 25-35min at 20-40 DEG C, and after vacuum filtration, it is more to obtain a strata
Bar amine encapsulated red phosphorus；
(3) a strata dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), repeats step (2), obtains
Two layers of poly-dopamine encapsulated red phosphorus, then two layers of poly-dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), it repeats
Step (2) obtains three strata dopamine encapsulated red phosphorus, and 200 meshes are crossed after being baked to, grinding, and it is red to obtain poly-dopamine cladding
Phosphorus microcapsule flame retardant；
Wherein, the oleic acid rare earth is made of following methods: by weight, by 20-28 parts of ytterbium chlorides, 13-16 parts
Samarium trichloride is added into 160-200 parts of water, then continuously adds 40-50 parts of enuatrols thereto, heats the mixture to 60-70
After DEG C, after keeping the temperature and continuing stir process 3-4 hours, upper aqueous layer is gone, sediment is adopted after being washed with deionized water, evaporated
Moisture content is removed, oleic acid rare earth is obtained.
Specifically, in above-mentioned steps (1), the concentration of disodium phosphate soln and sodium dihydrogen phosphate is 0.1mol/
The concentration of L, sodium hydroxide solution or potassium hydroxide solution is 0.5mol/L.
Specifically, in above-mentioned steps (2), the revolving speed of magnetic agitation is 250-300r/min.
Specifically, in above-mentioned steps (3), the temperature of drying and processing is 75-80 DEG C, and the time of drying and processing is 2-3 hours.
The present invention also provides a kind of application methods of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, comprising the following steps:
By weight, 8-12 parts of poly-dopamine encapsulated red phosphorus microcapsule flame retardants are added to 80-90 parts of unsaturated polyurethane resins
In, after being ultrasonically treated 3-5min, 2-4 parts of curing agent, 2-4 parts of promotors are successively added thereto, after processing is sufficiently stirred, solidification
After processing 2-3 days, flame-retarded resin is obtained.
Specifically, the acid value of above-mentioned unsaturated polyurethane resin is 28mgKOH/g, solid content 28%.
Specifically, above-mentioned curing agent is vinyl triamine, diaminocyclohexane, any one in ethylenediamine, promotor
For any one in dibutyl tin dilaurate, stannous octoate.
From the above technical scheme, it can be seen that the beneficial effects of the present invention are:
A kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant provided by the invention, easy to operate, cost
It is cheap, three layers of cladding are carried out to red phosphorus combustion inhibitor using poly-dopamine, the water resistance of red phosphorus combustion inhibitor can be effectively promoted, mention
Its compatibility between polymer is risen, and then ensure that every mechanical property of flame-retarded resin, while poly-dopamine can also be with
Red phosphorus combustion inhibitor generates phosphorus-nitrogen cooperative flame retardant, and anti-flammability, thermal stability are more excellent.Oleic acid rare earth provided by the invention, can have
The promotion dopamine polymerization of effect generates poly-dopamine nano particle, and can also promote poly-dopamine nano particle to red phosphorus flame-retardant
The adsorption effect of agent, ensure that the consistency of red phosphorus combustion inhibitor poly-dopamine clad, and then improve flame-retarded resin items power
Learn performance and flame retardant property.
Detailed description of the invention
Fig. 1 is the thermogravimetric curve of UPR-0 and UPR-RP, UPR-MRP, and wherein UPR-0 is the unsaturation for not adding fire retardant
Polyurethane resin, UPR-RP are the unsaturated polyurethane resin for being added to the red phosphorus of non-modified processing, and UPR-MRP is to be added to
Poly-dopamine coats the unsaturated polyurethane resin of red phosphorus three times.
Fig. 2 is the scanning electron microscope (SEM) photograph of the configuration of surface in UPR-0 tension failure face.
Fig. 3 is the scanning electron microscope (SEM) photograph of the configuration of surface in UPR-RP tension failure face.
Fig. 4 is the scanning electron microscope (SEM) photograph of the configuration of surface in UPR-MRP tension failure face.
Specific embodiment
Principles and features of the present invention are described below in conjunction with drawings and the specific embodiments, example is served only for solving
The present invention is released, is not intended to limit the scope of the present invention.The drug used in following embodiment is then city unless otherwise noted
Product is sold, the method used then is the conventional method that those skilled in the art use unless otherwise noted.
Embodiment 1
A kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, including following operating procedure:
(1) it after mixing isometric 0.1mol/L disodium phosphate soln with 0.1mol/L sodium dihydrogen phosphate, uses
0.5mol/L sodium hydroxide solution adjusts its pH value to 8, and buffer is made；
(2) by weight, 5 parts of red phosphorus combustion inhibitors, 0.3 part of dopamine, 0.5 part of oleic acid rare earth are added to 950 parts and are delayed
In fliud flushing, 25min is reacted with the revolving speed magnetic agitation of 250r/min at 20 DEG C, after vacuum filtration, obtains a strata dopamine
Encapsulated red phosphorus；
(3) a strata dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), repeats step (2), obtains
Two layers of poly-dopamine encapsulated red phosphorus, then two layers of poly-dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), it repeats
Step (2) obtains three strata dopamine encapsulated red phosphorus, it is crossed 200 meshes after 75 DEG C of drying and processings 2 hours, grinding, is obtained
Poly-dopamine encapsulated red phosphorus microcapsule flame retardant；
Wherein, the oleic acid rare earth is made of following methods: by weight, by 20 parts of ytterbium chlorides, 13 parts of samarium trichlorides
It is added into 160 parts of water, then continuously adds 40 parts of enuatrols thereto, after heating the mixture to 60 DEG C, keep the temperature and continue
After stir process 3 hours, upper aqueous layer is gone, sediment is adopted after being washed with deionized water, evaporation removes moisture content, obtains oleic acid
Rare earth.
The present embodiment also provides a kind of application method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, including following step
It is rapid: by weight, 8 parts of poly-dopamine encapsulated red phosphorus microcapsule flame retardants are added into 80 parts of unsaturated polyurethane resins,
After being ultrasonically treated 3min, 2 parts of vinyl triamines, 2 parts of dibutyl tin dilaurates are successively added thereto, processing is sufficiently stirred
Afterwards, after curing process 2 days, flame-retarded resin is obtained, wherein the acid value of unsaturated polyurethane resin used is 28mgKOH/g, solid
Content is 28%.
Embodiment 2
A kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, including following operating procedure:
(1) it after mixing isometric 0.1mol/L disodium phosphate soln with 0.1mol/L sodium dihydrogen phosphate, uses
0.5mol/L sodium hydroxide solution adjusts its pH value to 8.5, and buffer is made；
(2) by weight, 7 parts of red phosphorus combustion inhibitors, 0.5 part of dopamine, 0.8 part of oleic acid rare earth are added to 980 parts and are delayed
In fliud flushing, 30min is reacted with the revolving speed magnetic agitation of 280r/min at 30 DEG C, after vacuum filtration, obtains a strata dopamine
Encapsulated red phosphorus；
(3) a strata dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), repeats step (2), obtains
Two layers of poly-dopamine encapsulated red phosphorus, then two layers of poly-dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), it repeats
Step (2) obtains three strata dopamine encapsulated red phosphorus, it is crossed 200 meshes after 78 DEG C of drying and processings 2.5 hours, grinding, is obtained
To poly-dopamine encapsulated red phosphorus microcapsule flame retardant；
Wherein, the oleic acid rare earth is made of following methods: by weight, by 24 parts of ytterbium chlorides, 15 parts of samarium trichlorides
It is added into 180 parts of water, then continuously adds 45 parts of enuatrols thereto, after heating the mixture to 65 DEG C, keep the temperature and continue
After stir process 3.5 hours, upper aqueous layer is gone, sediment is adopted after being washed with deionized water, evaporation removes moisture content, obtains oil
Acid rare earth.
The present embodiment also provides a kind of application method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, including following step
It is rapid: by weight, 10 parts of poly-dopamine encapsulated red phosphorus microcapsule flame retardants are added into 85 parts of unsaturated polyurethane resins,
After being ultrasonically treated 4min, 3 parts of diaminocyclohexanes, 3 parts of stannous octoates are successively added thereto, after processing is sufficiently stirred, solidification
After processing 2 days, flame-retarded resin is obtained, wherein the acid value of unsaturated polyurethane resin used is 28mgKOH/g, solid content is
28%.
Embodiment 3
A kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, including following operating procedure:
(1) it after mixing isometric 0.1mol/L disodium phosphate soln with 0.1mol/L sodium dihydrogen phosphate, uses
0.5mol/L sodium hydroxide solution adjusts its pH value to 9, and buffer is made；
(2) by weight, 9 parts of red phosphorus combustion inhibitors, 0.6 part of dopamine, 1.0 parts of oleic acid rare earths are added to 1000 parts and are delayed
In fliud flushing, 35min is reacted with the revolving speed magnetic agitation of 300r/min at 40 DEG C, after vacuum filtration, obtains a strata dopamine
Encapsulated red phosphorus；
(3) a strata dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), repeats step (2), obtains
Two layers of poly-dopamine encapsulated red phosphorus, then two layers of poly-dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), it repeats
Step (2) obtains three strata dopamine encapsulated red phosphorus, it is crossed 200 meshes after 80 DEG C of drying and processings 3 hours, grinding, is obtained
Poly-dopamine encapsulated red phosphorus microcapsule flame retardant；
Wherein, the oleic acid rare earth is made of following methods: by weight, by 28 parts of ytterbium chlorides, 16 parts of samarium trichlorides
It is added into 200 parts of water, then continuously adds 50 parts of enuatrols thereto, after heating the mixture to 70 DEG C, keep the temperature and continue
After stir process 4 hours, upper aqueous layer is gone, sediment is adopted after being washed with deionized water, evaporation removes moisture content, obtains oleic acid
Rare earth.
The present embodiment also provides a kind of application method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, including following step
It is rapid: by weight, 12 parts of poly-dopamine encapsulated red phosphorus microcapsule flame retardants are added into 90 parts of unsaturated polyurethane resins,
After being ultrasonically treated 5min, successively it is added in 4 parts of ethylenediamines thereto, 4 parts of stannous octoates, after processing is sufficiently stirred, curing process 3
After it, flame-retarded resin is obtained, wherein the acid value of unsaturated polyurethane resin used is 28mgKOH/g, solid content 28%.
Comparative example 1
Step does not add oleic acid rare earth in (2), remaining operating procedure is identical with embodiment 1.
Sample test method:
1, oxygen index (OI) is tested
Oxygen index (OI) (10I) refers to that under the defined conditions material is under conditions of the mixed gas of oxygen and nitrogen, material
The oxygen content needed when flame combustion is carried out to support the minimum value of burning.Oxygen index (OI) it is high illustrate that material is not easy
Burning, belongs to nonflammable material, oxygen index (OI) it is low then illustrate that material is easy burning, belong to inflammable or combustible material, it is general general
All over the oxygen index (OI) of combustible material is thought less than 22, between 22 to 27 ranges, the oxygen of nonflammable material refers to the oxygen index (OI) of combustible material
It is several, it is greater than 27.The oxygen index measurer that this experiment uses executes GB-T2406-1993 standard to execute, sample is made
At 15cm × 1cm × 3cm；
1 flame-retarded resin oxygen index (OI) testing research of table
| Project | Oxygen index (OI), % |
| Embodiment 1 | 30.8 |
| Comparative example 1 | 29.1 |
| Embodiment 2 | 30.9 |
| Embodiment 3 | 31.0 |
| Do not add MRP | 23 |
| RP fire retardant is unprocessed | 28.3 |
| Poly-dopamine coats 1 time | 29.2 |
| Poly-dopamine coats 2 times | 29.5 |
| Poly-dopamine coats 4 times | 29.3 |
As shown in Table 1, poly-dopamine encapsulated red phosphorus (MRP) is more preferable to the flame retardant effect of unsaturated-resin, and main cause is
By the modified red phosphorus in surface (RP), the poly-dopamine as wall material contains ignition-proof element nitrogen, can be with the phosphorus as core material
Good flame retardant synergistic effect is generated, therefore has further raising to the flame retardant effect of unsaturated-resin, is passed through simultaneously
The addition of oleic acid rare earth can make the covered effect of poly-dopamine more excellent, and flame retardant effect is stronger, and different by cladding
Number carry out limiting oxygen index determination, it is best that discovery coats 3 effects to RP, this is because phosphorus-nitrogen collaboration has optimal element
Proportion, when RP is coated 3 times, the layer of charcoal that when burning is formed is most fine and close, to reach flame retardant effect, and coats 4 times, although adherency
Ability enhances, but it also reduces the phosphorus content in MRP simultaneously, so fire retardancy reduces.
2, tension test
Universal testing machine is also universal tensile testing machine, and Mechanics Performance Testing batten specification is 15cm × 1cm × 3cm, this
Execution standard GB/T 1040.2-2006 is pressed in experiment, will be with poly-dopamine iron Wrapped up Phosphorus Fire Retardant sample according to standard GB/T
1040.2-2006 is made into sample, does tension test to sample using universal testing machine to study its tensile strength after cladding,
The size of elongation at break, and then it is comparatively preferable to the Effect on Mechanical Properties of material to compare that flame-retardant formulations.Mechanical property
Energy test bars specification is 15cm × 1cm × 30mm；
2 flame-retarded resin tensile property result of table
The unsaturated polyurethanes tensile property for being added to MRP has opposite raising, and tensile strength is than directly adding BR's
Unsaturated polyurethanes improve, and tensile modulus of elasticity increases, this is because improving RP and unsaturated-resin after poly-dopamine cladding
Compatibility, improved in terms of mechanical property.
3, thermogravimetric test
It is protection gas and using tap water as coolant, 0.1Mpa- that the condition that this experiment needs, which is with inert nitrogen gas,
0.15Mpa or so is the pressure difference for protecting gas, and 30ml/min is gas flow control, and the quality of test sample is in 5-10mg, temperature heating
To 650 DEG C or so.We seek activation energy in order to more preferable, heating rate be respectively adopted 5 DEG C/min, 10 DEG C/min, 15 DEG C/
min,20℃/min.Carry out thermogravimetric test before we first by sample on microcomputer balance static a period of time, to balance stablize
After start to be tested.
As shown in Fig. 1, the thermal stability of UPR-0, UPR-RP and UPR-MRP successively enhance, it may thus be appreciated that poly-dopamine
As imitative mussel material, it is firmly adhered to fire retardant surface, imitates mussel material as wall material, fire retardant is maximum as core material
Maintain the primary characteristic of fire retardant, while increasing charcoal source.
4, sem test
This experiment carries out taper calorimetric experiment and stretching experiment to UPR-0, UPR-RP, UPR-MRP first, then collects combustion
The sample after ash and stretching after burning, is then made into scanning electron microscope Special sample, then plates one on the surface of specimen material
Layer metal layer utilizes SBC-12 type ion sputtering instrument, then under vacuum conditions, according to the working principle of scanning electron microscope 26kv's
Under experiment condition, all the surface of material ash and tension failure face are swept after 50 times, 500 times, 1000 times of amplification respectively
It retouches, high-visible relatively uniform region is selected to be imaged.
Break surface it can be seen from attached drawing 2-4 but with respect to UPR-MRP, UPR-RP plane of disruption particle is more, and RP
There is very big gap between substrate, it is possible thereby to illustrate that modified RP compatibility is obviously greatly improved, to reduce
Gap between additive and substrate well may be used to reduce influence of the addition of fire retardant to substrate mechanical property
To explain that mechanical property of the red phosphorus after poly-dopamine modified lithium is improved significantly reason.
Claims (7)
1. a kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant, which is characterized in that including following operating procedure:
(1) after mixing disodium phosphate soln with sodium dihydrogen phosphate, in sodium hydroxide solution or potassium hydroxide solution
Its pH value of any adjusting to 8-9, buffer is made；
(2) by weight, by 5-9 parts of red phosphorus combustion inhibitors, 0.3-0.6 parts of dopamines, 0.5-1.0 parts of oleic acid rare earths be added to
In 950-1000 portions of buffers, magnetic agitation reacts 25-35min at 20-40 DEG C, after vacuum filtration, obtains a strata DOPA
Amine encapsulated red phosphorus；
(3) a strata dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), repeats step (2), obtains two layers
Poly-dopamine encapsulated red phosphorus, then two layers of poly-dopamine encapsulated red phosphorus is substituted for the red phosphorus combustion inhibitor in step (2), repeat step
(2), three strata dopamine encapsulated red phosphorus are obtained, 200 meshes are crossed after being baked to, grinding, it is micro- to obtain poly-dopamine encapsulated red phosphorus
Capsule fire retardant；
Wherein, the oleic acid rare earth is made of following methods: by weight, by 20-28 parts of ytterbium chlorides, 13-16 parts of chlorinations
Samarium is added into 160-200 parts of water, then continuously adds 40-50 parts of enuatrols thereto, heats the mixture to 60-70 DEG C
Afterwards, after keeping the temperature and continuing stir process 3-4 hours, upper aqueous layer is gone, sediment is adopted after being washed with deionized water, evaporation removes
Moisture content is removed, oleic acid rare earth is obtained.
2. a kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant according to claim 1, feature exist
In in above-mentioned steps (1), the concentration of disodium phosphate soln and sodium dihydrogen phosphate is 0.1mol/L, and sodium hydroxide is molten
The concentration of liquid or potassium hydroxide solution is 0.5mol/L.
3. a kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant according to claim 1, feature exist
In in above-mentioned steps (2), the revolving speed of magnetic agitation is 250-300r/min.
4. a kind of preparation method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant according to claim 1, feature exist
In in above-mentioned steps (3), the temperature of drying and processing is 75-80 DEG C, and the time of drying and processing is 2-3 hours.
5. a kind of application method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant as described in claim 1, which is characterized in that
The following steps are included: by weight, 8-12 parts of poly-dopamine encapsulated red phosphorus microcapsule flame retardants are added to 80-90 parts of insatiable hungers
In polyurethane resin, after being ultrasonically treated 3-5min, 2-4 parts of curing agent, 2-4 parts of promotors is successively added thereto, sufficiently stir
After mixing processing, after curing process 2-3 days, flame-retarded resin is obtained.
6. a kind of application method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant according to claim 5, feature exist
In the acid value of above-mentioned unsaturated polyurethane resin is 28mgKOH/g, solid content 28%.
7. a kind of application method of poly-dopamine encapsulated red phosphorus microcapsule flame retardant according to claim 5, feature exist
It is vinyl triamine, diaminocyclohexane, any one in ethylenediamine in, above-mentioned curing agent, promotor is tin dilaurate two
Any one in butyl tin, stannous octoate.
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Cited By (1)
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| CN115594986A (en) * | 2022-10-13 | 2023-01-13 | 江苏中煜橡塑科技有限公司（Cn） | High-conductivity fluororubber sealing ring for lithium battery and preparation method thereof |
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| EP0635040B1 (en) * | 1992-04-08 | 2001-06-13 | Vivorx, Incorporated | Crosslinked biocompatible encapsulation compositions and methods |
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| CN115594986B (en) * | 2022-10-13 | 2023-11-03 | 江苏中煜橡塑科技有限公司 | High-conductivity fluororubber sealing ring for lithium battery and preparation method thereof |
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