CN105153465B - A kind of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant and preparation method thereof - Google Patents
A kind of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant and preparation method thereof Download PDFInfo
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- CN105153465B CN105153465B CN201510653934.XA CN201510653934A CN105153465B CN 105153465 B CN105153465 B CN 105153465B CN 201510653934 A CN201510653934 A CN 201510653934A CN 105153465 B CN105153465 B CN 105153465B
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- C—CHEMISTRY; METALLURGY
- 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
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/40—Compounds of aluminium
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- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
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Abstract
The present invention relates to a kind of halogen-free flame retardants, and in particular to a kind of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant.A kind of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, shown in structure such as formula (I)：In formula (I), black bar object represents hydrotalcite, is grafted on the compound of hydrotalcite surface as phosphorus nitrogen silicon compound, phosphorus nitrogen silicon compound accounts for the 1~40% of the phosphorus nitrogen silicon compound modified hydrotalcite fire retardant gross mass.Phosphorus nitrogen silicon compound is connected by chemical bond with hydrotalcite.Phosphorus nitrogen silicon compound modified hydrotalcite fire retardant of the present invention is suitable for processing temperature as the polymer modification within 300 DEG C.The phosphorus nitrogen silicon compound modified hydrotalcite fire retardant is not soluble in water and organic solvent.
Description
Technical field
The present invention relates to a kind of halogen-free flame retardants, and in particular to a kind of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant and its
Preparation method.
Background technology
As a kind of halogen-free flame retardants, fire retardation is existing to be gradually recognized hydrotalcite, hydrotalcite burning or by
Intermediary water and carbonate and hydroxyl are lost when hot, will largely be absorbed heat in the process, fire-retardant effect can be played；In addition, point
Solid product after solution has very big specific surface area and stronger alkalescence, can thermally decompose the sour gas discharged by absorbing material in time
Body and smog and play the role of press down cigarette, eliminate smoke.Hydrotalcite sheets layer surface has very strong polarity, with lipophilic polymer matrix
Body is compatible very poor, therefore, before polymer/houghite composite material is prepared, it usually needs hydrotalcite is carried out it is organically-modified,
And make surface that there is lipophile., can be compound with polymer progress after common anion surfactant is to its organic-treating,
The composite material of good mechanical properties is obtained, but common activating agent contains Long carbon chain, does not have anti-flammability to polymeric matrix,
Often weaken its fire retardation.
P elements can act on resin as acid source, promote carbide in organic fire-retardant with expandable flame retardant effect
Generation, charcoal source, also known as carbon forming agent, the predominantly higher polyol or carbohydrate of some phosphorus content are such as set
Fat in itself, starch, pentaerythrite and its dimer and tripolymer etc.；Source of the gas, source of also known as foaming, can release inert gas, be
Containing nitrogen compound, such as ammonium class and amide.Nitrogen compound also has promotion to make in addition to foaming effect is played, to the formation of carburization zone
With.Element silicon is also one of common ignition-proof element, and element silicon can be introduced in phosphorus nitrogen Intumescent Retardant System to improve expansion resistance
The flame retardant property of combustion system.
The content of the invention
It is fire-retardant that the present invention provides a kind of green safe, at low cost, good flame retardation effect phosphorus nitrogen silicon compound modified hydrotalcite
Agent.
The present invention also provides a kind of preparation methods of the phosphorus nitrogen silicon compound modified hydrotalcite fire retardant.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, shown in structure such as formula (I)：
In formula (I), black bar object represents hydrotalcite, is grafted on the compound of hydrotalcite surface as phosphorus nitrogen silicon compound, phosphorus nitrogen
Silicon compound accounts for the 1~40% of the phosphorus nitrogen silicon compound modified hydrotalcite fire retardant gross mass.Phosphorus nitrogen passing through of silicon compound
Key is learned with hydrotalcite to be connected.It is 300 that phosphorus nitrogen silicon compound modified hydrotalcite fire retardant of the present invention, which is suitable for processing temperature,
Polymer modification within DEG C.The phosphorus nitrogen silicon compound modified hydrotalcite fire retardant is not soluble in water and organic solvent.
Through phosphorus nitrogen silicon compound modified hydrotalcite fire retardant modified hydrotalcite fire retardant, not only drop raising hydrotalcite and polymerizeing
Dispersiveness and compatibility in object matrix, and the phosphorus nitrogen silicon compound for being supported on hydrotalcite surface can promote the formation of layer of charcoal,
The fire retardation to polymeric matrix is improved, is provided to solve the problems, such as that the flame-retardant modified high molecular material of above-mentioned hydrotalcite exists
A kind of new approach.
Preferably, the phosphorus nitrogen silicon compound be by amino-contained silane coupling agent and diphenyl phosphate chloride reaction and
Into.
A kind of preparation method of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, includes the following steps：The silane of amino-contained
Coupling agent and hydrotalcite powder particle reaction, obtain silane coupler modified hydrotalcite, then silane coupler modified hydrotalcite
Phosphorus nitrogen silicon compound modified hydrotalcite fire retardant is obtained by the reaction with diphenyl phosphate chloride.
Preferably, this method is specially：Hydrotalcite is added in toluene, ultrasonic disperse is moved into and is stirred equipped with machinery
It mixes, in the drying four-hole bottle of thermometer, reflux condensing tube and dropping funel, 3- propyl oxysilane is added dropwise at room temperature
With the mixed liquor of toluene, and reflux temperature is risen to, continue to be stirred to react to abundant, be then cooled to 30 DEG C, chlorine di(2-ethylhexyl)phosphate is added dropwise
The mixed liquor of phenyl ester, triethylamine and toluene, the reaction was continued to abundant；Then slurries obtained by the reaction are filtered, with ethyl alcohol repeatedly
Washing, it is dry 24 it is small when more than, obtain phosphorus nitrogen silicon compound modified hydrotalcite fire retardant.
Preferably, hydrotalcite, 3- propyls oxysilane, the mass ratio of diphenyl phosphate chloride and triethylamine are
2.68-113.85：0.5：0.65：2.
A kind of application of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant in terms of flame retardant composite material is prepared,
It is characterized in that：Phosphorus nitrogen silicon compound modified hydrotalcite fire retardant accounts for the 5-15% of flame retardant composite material gross mass.
Further, the flame retardant composite material by phosphorus nitrogen silicon compound modified hydrotalcite and EVA using mass ratio as 9：1
Ratio mix.
The beneficial effects of the invention are as follows：Phosphorus nitrogen silicon compound modified hydrotalcite fire retardant produced by the present invention, utilizes phosphorus nitrogen
Silicon compound carries out chemical modification to hydrotalcite, is conducive to hydrotalcite and disperses in the polymer, solves organic fire-retardant in height
Migration sex chromosome mosaicism in molecular material；Phosphorus nitrogen silicon compound modified hydrotalcite fire retardant of the present invention uses halogen-free flameproof body
System, reduces " secondary hazards " during material combustion；Fire retardant of the present invention utilizes phosphorus nitrogen silicon compound and neatly
Stone cooperative flame retardant acts on, and improves the flame retardant effect to high molecular material, reduces usage amount of the fire retardant in high molecular material, reduces
The cost of fire proofing.
Fire retardant of the present invention compares the hydrotalcite of the modifier modification containing Long carbon chain, and phosphorus nitrogen silicon compound increases neatly
Stone organises the polarity of part, so as to improve and the high molecular compatibility of polarity.Fire retardant of the present invention is halogen-free,
Good flame retardation effect, it is applied widely, meet environmental requirement.
Description of the drawings
Fig. 1 is the infrared spectrogram of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant of the present invention.
Specific embodiment
Below by specific embodiment, technical scheme is described in further detail.It should be appreciated that this hair
Bright implementation is not limited to the following examples, the accommodation in any form of make the present invention and/or changing all fall
Enter the scope of the present invention.
In the present invention, if not refering in particular to, all parts, percentage are unit of weight, used equipment and raw material etc.
It is commercially available or commonly used in the art.Method in following embodiments is the normal of this field unless otherwise instructed
Rule method.
Embodiment 1
4.6g hydrotalcites are added in 100mL toluene, ultrasonic disperse is moved into after 30 minutes equipped with mechanical agitation, temperature
In the drying four-hole bottle of degree meter, reflux condensing tube and dropping funel, 0.5g 3- propyl oxysilane is added dropwise at room temperature
With 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, 0.65g chlorine phosphoric acid be added dropwise
Diphenyl ester, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when.Then slurries obtained by the reaction are filtered, uses ethyl alcohol
Wash repeatedly, and in 80 DEG C of baking oven it is dry 24 it is small when, phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, wherein phosphorus nitrogen is made
The mass content of silicon compound is 20%.
Embodiment 2
2.68g hydrotalcites are added in 50mL toluene, ultrasonic disperse is moved into after 30 minutes equipped with mechanical agitation, temperature
In the drying four-hole bottle of degree meter, reflux condensing tube and dropping funel, 0.5g 3- propyl oxysilane is added dropwise at room temperature
With 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, 0.65g chlorine phosphoric acid be added dropwise
Diphenyl ester, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when.Then slurries obtained by the reaction are filtered, uses ethyl alcohol
Wash repeatedly, and in 80 DEG C of baking oven it is dry 24 it is small when, phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, wherein phosphorus nitrogen is made
The mass content of silicon compound is 30%.
Embodiment 3
10.35g hydrotalcites are added in 180mL toluene, ultrasonic disperse is after 30 minutes, be moved into equipped with mechanical agitation,
In the drying four-hole bottle of thermometer, reflux condensing tube and dropping funel, 0.5g 3- propyl oxygroup silicon is added dropwise at room temperature
Alkane and 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, 0.65g chlorine phosphorus be added dropwise
Diphenyl phthalate, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when.Then slurries obtained by the reaction are filtered, uses second
Alcohol washs repeatedly, and in 80 DEG C of baking oven it is dry 24 it is small when, phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, wherein phosphorus is made
The mass content of nitrogen silicon compound is 10%.
Embodiment 4
113.85g hydrotalcites are added in 1500mL toluene, ultrasonic disperse was moved into and is stirred equipped with machinery after 30 minutes
It mixes, in the drying four-hole bottle of thermometer, reflux condensing tube and dropping funel, 0.5g 3- propyl oxygen is added dropwise at room temperature
Base silane and 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, 0.65g be added dropwise
Diphenyl phosphate chloride, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when.Then slurries obtained by the reaction are filtered,
Washed repeatedly with ethyl alcohol, and in 80 DEG C of baking oven it is dry 24 it is small when, phosphorus nitrogen silicon compound modified hydrotalcite fire retardant is made,
The mass content of middle phosphorus nitrogen silicon compound is 1%.
Embodiment 5
1.725g hydrotalcites are added in 40mL toluene, ultrasonic disperse is moved into after 30 minutes equipped with mechanical agitation, temperature
In the drying four-hole bottle of degree meter, reflux condensing tube and dropping funel, 0.5g 3- propyl oxysilane is added dropwise at room temperature
With 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, 0.65g chlorine phosphoric acid be added dropwise
Diphenyl ester, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when.Then slurries obtained by the reaction are filtered, uses ethyl alcohol
Wash repeatedly, and in 80 DEG C of baking oven it is dry 24 it is small when, phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, wherein phosphorus nitrogen is made
The mass content of silicon compound is 40%.
Embodiment 6：The application of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant
For the preparation manipulation of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant with embodiment 1, Fig. 1 is that phosphorus nitrogen silication of the present invention is closed
The infrared spectrogram of object modified hydrotalcite fire retardant.900g ethylene-vinyl acetate copolymers (EVA) and the silication of 100g phosphorus nitrogen are closed
Object modified hydrotalcite fire retardant is put into high speed dispersor and stirs 8 minutes, by said mixture after taking-up, by double screw extruder
(processing temperature scope is 130~150 DEG C) extruding pelletization, obtains EVA/ phosphorus nitrogen silicon compound modified hydrotalcite fire retardant composite woods
Material, cone calorimetry measures the fire-retardant performance of the composite material, and the results are shown in Table 1.
Table 1
Note：EVA/ organic hydrotalcite fire-retardant composite materials：The mass ratio of organic hydrotalcite and EVA are 9：1, organic neatly
Stone is the hydrotalcite of lauryl sodium sulfate organic-treating, and lauryl sodium sulfate is 8 with hydrotalcite mass ratio：2；EVA/ phosphorus
Nitrogen silicon compound modified hydrotalcite fire-retardant composite material：The mass ratio of phosphorus nitrogen silicon compound modified hydrotalcite and EVA are 9：1,
Phosphorus nitrogen silicon compound is 8 with hydrotalcite mass ratio：2；Above-mentioned EVA resin used is ethylene-vinyl acetate copolymer, acetic acid second
The mass content of alkene is 18%.
By table 1, compared with EVA resin, the EVA/ phosphorus nitrogen silication of phosphorus nitrogen silicon compound modified hydrotalcite is with the addition of
The heat release rate peak value of polymer modified hydrotalcite fire-retardant composite material reduces 61%, and burning time extends about 14 seconds,
Hot total volume, specific extinction area average, mass loss Mean Speed have different degrees of decline, show phosphorus nitrogen silicon compound
Modified hydrotalcite can effectively improve the flame retardant property of EVA resin, and it is better than producing with based flame retardant to the fire retardation of EVA resin
The hydrotalcite of product lauryl sodium sulfate organic-treating.
Embodiment described above is a kind of preferable scheme of the present invention, and not the present invention is made in any form
Limitation also has other variants and remodeling on the premise of without departing from the technical solution recorded in claim.
Claims (7)
- A kind of 1. phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, it is characterised in that phosphorus nitrogen silicon compound modified hydrotalcite fire retardant It is made by following methods：4.6g hydrotalcites are added in 100mL toluene, ultrasonic disperse is moved into after 30 minutes equipped with machinery Stirring, thermometer, reflux condensing tube and dropping funel drying four-hole bottle in, 0.5g 3- propyls are added dropwise at room temperature Oxysilane and 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, be added dropwise 0.65g diphenyl phosphate chlorides, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when；Then slurries obtained by the reaction Filtering, is washed repeatedly with ethyl alcohol, and in 80 DEG C of baking oven it is dry 24 it is small when, it is fire-retardant that phosphorus nitrogen silicon compound modified hydrotalcite is made Agent, the wherein mass content of phosphorus nitrogen silicon compound are 20%.
- A kind of 2. phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, it is characterised in that phosphorus nitrogen silicon compound modified hydrotalcite fire retardant It is made by following methods：2.68g hydrotalcites are added in 50mL toluene, ultrasonic disperse is moved into after 30 minutes equipped with machinery Stirring, thermometer, reflux condensing tube and dropping funel drying four-hole bottle in, 0.5g 3- propyls are added dropwise at room temperature Oxysilane and 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, be added dropwise 0.65g diphenyl phosphate chlorides, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when；Then slurries obtained by the reaction Filtering, is washed repeatedly with ethyl alcohol, and in 80 DEG C of baking oven it is dry 24 it is small when, it is fire-retardant that phosphorus nitrogen silicon compound modified hydrotalcite is made Agent, the wherein mass content of phosphorus nitrogen silicon compound are 30%.
- A kind of 3. phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, it is characterised in that phosphorus nitrogen silicon compound modified hydrotalcite fire retardant It is made by following methods：10.35g hydrotalcites are added in 180mL toluene, ultrasonic disperse is moved into after 30 minutes equipped with machine Tool stirring, thermometer, reflux condensing tube and dropping funel drying four-hole bottle in, 0.5g 3- aminopropyl front threes are added dropwise at room temperature Base oxysilane and 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, be added dropwise 0.65g diphenyl phosphate chlorides, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when；Then slurries obtained by the reaction Filtering, is washed repeatedly with ethyl alcohol, and in 80 DEG C of baking oven it is dry 24 it is small when, it is fire-retardant that phosphorus nitrogen silicon compound modified hydrotalcite is made Agent, the wherein mass content of phosphorus nitrogen silicon compound are 10%.
- A kind of 4. phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, it is characterised in that phosphorus nitrogen silicon compound modified hydrotalcite fire retardant It is made by following methods：113.85g hydrotalcites are added in 1500mL toluene, ultrasonic disperse was moved into and is equipped with after 30 minutes Mechanical agitation, thermometer, reflux condensing tube and dropping funel drying four-hole bottle in, 0.5g 3- aminopropyls three are added dropwise at room temperature Methyl oxysilane and 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, be added dropwise 0.65g diphenyl phosphate chlorides, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when；Then slurries obtained by the reaction Filtering, is washed repeatedly with ethyl alcohol, and in 80 DEG C of baking oven it is dry 24 it is small when, it is fire-retardant that phosphorus nitrogen silicon compound modified hydrotalcite is made Agent, the wherein mass content of phosphorus nitrogen silicon compound are 1%.
- A kind of 5. phosphorus nitrogen silicon compound modified hydrotalcite fire retardant, it is characterised in that phosphorus nitrogen silicon compound modified hydrotalcite fire retardant It is made by following methods：1.725g hydrotalcites are added in 40mL toluene, ultrasonic disperse is moved into after 30 minutes equipped with machinery Stirring, thermometer, reflux condensing tube and dropping funel drying four-hole bottle in, 0.5g 3- propyls are added dropwise at room temperature Oxysilane and 10mL toluene mixture liquids, and rise to reflux temperature, continue to be stirred to react 6 it is small when, be cooled to 30 DEG C, be added dropwise 0.65g diphenyl phosphate chlorides, 2g triethylamines and 15mL toluene mixture liquids, the reaction was continued 4 it is small when；Then slurries obtained by the reaction Filtering, is washed repeatedly with ethyl alcohol, and in 80 DEG C of baking oven it is dry 24 it is small when, it is fire-retardant that phosphorus nitrogen silicon compound modified hydrotalcite is made Agent, the wherein mass content of phosphorus nitrogen silicon compound are 40%.
- 6. a kind of phosphorus nitrogen silicon compound modified hydrotalcite fire retardant described in claim 1 is in terms of flame retardant composite material is prepared Using, it is characterised in that：Phosphorus nitrogen silicon compound modified hydrotalcite fire retardant accounts for the 5-15% of flame retardant composite material gross mass.
- 7. application according to claim 6, it is characterised in that：The flame retardant composite material is modified by phosphorus nitrogen silicon compound Hydrotalcite is with EVA using mass ratio as 9：1 ratio mixes.
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| CN109384959B (en) * | 2018-09-11 | 2020-06-09 | 台州职业技术学院 | Preparation method of phosphorus-nitrogen high-load hydrotalcite flame retardant |
| CN110157042A (en) * | 2019-04-28 | 2019-08-23 | 北京工商大学 | The application of novel surface inorganic agent, preparation method and the nano particle being processed in resistance combustion polyurethane foam |
| CN110305370A (en) * | 2019-06-13 | 2019-10-08 | 湘潭大学 | A kind of phosphonitrile graft modification houghite fire retardant and preparation method thereof |
| CN115304636A (en) * | 2022-08-15 | 2022-11-08 | 铨盛聚碳科技股份有限公司 | Organic silicon flame retardant containing phosphorus and nitrogen, and preparation method and application thereof |
| CN115385662A (en) * | 2022-09-30 | 2022-11-25 | 广东萨菲安新材料有限公司 | Phosphorus-nitrogen-silicon modified ceramic powder and application thereof |
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