CN101143947B - Halogen-free intumescent flame retardant for polypropylene - Google Patents

Halogen-free intumescent flame retardant for polypropylene Download PDF

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CN101143947B
CN101143947B CN200610112927A CN200610112927A CN101143947B CN 101143947 B CN101143947 B CN 101143947B CN 200610112927 A CN200610112927 A CN 200610112927A CN 200610112927 A CN200610112927 A CN 200610112927A CN 101143947 B CN101143947 B CN 101143947B
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fire retardant
halogen
polypropylene
retardant
coupling agent
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CN101143947A (en
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逯翠霞
安彦杰
严金荣
李冬霞
张瑞
孟凡瑞
何书艳
李广东
吴林美
邹恩广
姜进宪
李洪涛
王熺
张怀志
赵晶莹
袁宗辉
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Petrochina Co Ltd
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Abstract

A kind of polypropylene uses the halogen-free expansion type fire retardant, relate to a fire retardant for polyolefin, by melamine salt, ammonium polyphosphate, lubricant, coupling agent and char forming promoter complex formulation to get final product, the percentage of each component accounts for the total weight of fire retardant in the fire retardant is, melamine salt 14% -90%, ammonium polyphosphate 9% -85%, lubricant 0.1% -2%, coupling agent 0.1% -2%, char forming promoter 0.1% -5%; when the flame retardant is used for flame retarding polypropylene powder or granules, the lowest addition amount is 21 percent (wt), and the flame retarding grade can reach V-0 grade according to the test of the American UL94 method. Compared with bromine, the flame retardant of the invention is environment-friendly, and the halogen-free flame retardant polypropylene has low smoke density, less smoke generation, low mass loss rate and large residual mass.

Description

A kind of halogen-free expansion fire retardant for polypropylene
Technical field
The present invention relates to a kind of polyolefine fire retardant, particularly a kind of halogen-free expansion fire retardant for polypropylene.
Background technology
Fire retardant material particularly environmentally friendly type halogen-free flame-retardant polymer material and flame-retarded technology are just becoming the focus of whole world research, and the cry of halogen-free flameproof grows to even greater heights, and countries such as European Union put into effect laws and regulations in succession, the use of restriction halogenated flame retardant.Make macromolecular material have flame retardant resistance, do not produce toxic smog during burning, must introduce pollution-free type ignition-proof element in polymer, introducing the most practical and effective means of pollution-free ignition-proof element in the material is to add environmentally friendly type fire retardant.
At present, the fire-retardant means that are used for superpolymer mainly are to add halogenated flame retardant, halogenated flame retardant can be emitted the black smoke of the toxic gas that includes the victimization body in a large number in fire-retardant process, still be that resuming work after the calamity all can be caused very big difficulty to the rescue in the fire.According to fire report statistics, really burn lethal number in the fire and only account for 15%, and 85% people dies from suffocating that toxic smoke causes.In addition, there is data to show, produces highly toxic bromo dibenzo during some hydrobromic ether fire retardant (as decabromodiphynly oxide) burnings and cough up alkane and bromo diphenylene-oxide.For the consideration to human health and environment protection, simultaneously according to some experimental results that now obtained, people hold scrupulous more attitude to bromide fire retardant.Halogen-free flame retardants is used extensive day by day with its low-smoke and avirulent advantage, the trend that replaces halogenated flame retardant is arranged.
Because expansion type flame retardant amount of being fuming in combustion processes is few, does not produce toxic gas, belongs to environment friendly flame retardant, is considered to realize one of non-halogen fire-retardant approach that gets a good chance of.Expansion type flame retardant can be divided into mixed expanded type fire retardant and single component expansion type flame retardant.Mixed expanded type fire retardant is the fire-retardant agent based on ammonium polyphosphate, it is fire-retardant that the at present existing commercial prod of country such as the U.S., Italy is used for polyolefine, Exolit IFR series as U.S. Hoechst Celanese company, have superior heat-stability and use properties, be applicable to that PP is fire-retardant, when the fire retardant consumption was 25% (wt)~30% (wt), the oxygen index of fire retardant material can reach 30, fire-retardant rank reaches the UL-94V-0 level, and living cigarette amount is with fire retardant material is not equally matched.
The Spinfiam MF-82 series expansion type flame retardant that Italy Monsanto company releases, its characteristics are similar to ExolitIFR series, are applicable to fire-retardant PP and LDPE.The XLDPE toxicity fire-retardant with Spinfiam is little, and living cigarette amount is more much lower than PVC, compares with the XLDPE that adopts magnesium hydroxide flame retardant, and density is low by 30~40%, is the ideal covering material of cable.
The greatest drawback of above-mentioned mixed expanded type fire retardant is problems such as processing difficulties, moisture absorption, large usage quantity, the mechanical property that influences material and price height, causes to use to be restricted.
The R and D of China's flame-retarded technology are started late, still be in early stage of development, no matter from kind quantity, state of the art, or all respects such as application development, the construction of legal rules, still exist sizable gap compared with developed countries, but in recent years, the development of China's flame-retarded technology had obtained relevant department and expert's very big concern, had many R﹠D institutions setting foot in this field.Modified expanded type fire retardant based on ammonium polyphosphate (APP) has become domestic research focus, emphasis concentrates on APP is carried out modification, what have coats APP and encapsulated processing, improve the water absorbability problem, the cyanurotriamide modified APP of the usefulness that has prepares trimeric cyanamide secondary amine salt (MPP), by with carbon source and become the composite flame retarding efficiency that improves such as carbon promotor, carbon forming agent and become the research of carbon promotor also more focuses on improving the quality of expansion charcoal layer.
In the prior art, CN01128575.3 has introduced pentaerythritol phosphate, melamine phosphate, lubricant, coupling agent and has carried out composite formation fire retardant, and when the add-on in polyolefine was 28% (wt), flame retardant rating reached UL94V-0; CN1341669A has introduced the fire retardant that magnesium hydroxide and coupling agent, lubricant carry out composite formation, and the add-on in polypropylene reaches 60%; " research of expansion type flame retardant and expanded flame-retardant polypropylene performance " has been introduced APP, tetramethylolmethane, trimeric cyanamide, red phosphorus and has been joined in the polypropylene according to certain proportioning, and when add-on was 41% (wt), flame retardant rating reached the UL94V-0 level.
Summary of the invention
The objective of the invention is to, a kind of polypropylene fire retardant that is used for is provided, is the halogen-free expansion fire retardant of main ignition-proof element with nitrogen-phosphorus.
A kind of halogen-free expansion fire retardant for polypropylene, by trimeric cyanamide melamine salt, ammonium polyphosphate, lubricant, coupling agent with become that charcoal promotor is composite to be formed, the per-cent of each ingredients constitute fire retardant gross weight is in the fire retardant,
Trimeric cyanamide melamine salt 14%~90%,
Ammonium polyphosphate 9%~85%,
Lubricant 0.1%~2%,
Coupling agent 0.1%~2%,
Become charcoal promotor 0.1%~5%;
Wherein, the structural formula of trimeric cyanamide melamine salt is:
The structural formula of ammonium polyphosphate is:
Figure G200610112927XD00032
In the formula: 2000<n<10000.
Lubricant is stearic acid, Zinic stearas or calcium stearate.Coupling agent is the silicane material, can be γ-glycidyl ether oxygen propyl trimethoxy silicane or γ-An Bingjisanyiyangjiguiwan or titanate coupling agent.Becoming charcoal promotor is SiO 2, TiO 2Or PA-6.PA-6 is a nylon 6.
The weight percent preferred 25%~60% of trimeric cyanamide melamine salt in the fire retardant, the weight percent of ammonium polyphosphate preferred 20%~70%, the weight percent of lubricant preferred 0.5%~2%, the weight percent of coupling agent is preferred 0.5%~2%, becomes the weight percent preferred 0.5%~4% of charcoal promotor.
Fire retardant adopts following method to be prepared from:
At first trimeric cyanamide melamine salt and ammonium polyphosphate are dried, make water-content<0.2% (wt), pulverize then, make its particle diameter<35 μ m.
Secondly, in proportion with trimeric cyanamide melamine salt and ammonium polyphosphate with lubricant, coupling agent, become charcoal promotor to put into to mix 1~10 minute in the high speed mixer, can obtain halogen-free expansion fire retardant for polypropylene.
Expansion type flame retardant mainly plays fire retardation by forming porous foam charcoal layer at condensed phase, and this charcoal layer is the (see figure 1) that forms in following several steps of experience:
(1) at a lower temperature (actual temp depends on the character of acid source and other components) emitted by acid source can esterification polyol and can be used as the mineral acid of dewatering agent;
(2) discharge under the sour temperature a little higher than, esterification takes place, the amine in the system then can be used as catalyst for esterification;
(3) system melts before esterification or in the esterification process;
(4) water vapour that produces of reaction and the non-flammable gases that is produced by source of the gas make molten system expanded foamed.Simultaneously, polyvalent alcohol and ester dehydration carbonization form inorganics and charcoal resistates, and system are further expanded foamed;
When (5) reacting approaching finishing, system gel and curing form porous foam charcoal layer at last.
Set forth as can be seen by above mechanism, for expansion type flame retardant, becoming charcoal is the key of flame retardant effect quality.Fire retardant of the present invention, the trimeric cyanamide melamine salt in its two kinds of components are can the gas collection source, charcoal source and acid source be in the fire retardant of one; And ammonium polyphosphate has improved the one-tenth charcoal speed and the neat coal amout of fire retardant as acid source, and therefore, two kinds of composite uses of fire retardant have reached the independent use flame retardant effect that is beyond one's reach, and have played synergistic effect, have reduced the add-on of fire retardant.Synergistic effect between various auxiliary agents and the fire retardant is also similar therewith.
When fire retardant of the present invention is used for polypropylene flame redardant powder or pellet, addition is minimum when being 21% (wt), by the test of U.S. UL94 method, flame retardant rating can reach the V-0 level, compared to existing technology, the addition of fire retardant significantly reduces (referring to table 2), has reduced cost, and the while is the processing characteristics of impact polypropylene not.System compares with bromine, fire retardant environmental protection of the present invention, and the halogen-free polypropylene flame redardant smoke density is low, the amount of being fuming is few, mass loss rate is little, remaining quality is big.
Description of drawings
Fig. 1: porous charcoal layer formation process synoptic diagram
Embodiment
Embodiment 1~26
Embodiment sees Table 1, at first trimeric cyanamide melamine salt and ammonium polyphosphate is dried, and makes water-content<0.2% (wt), pulverizes then, makes its particle diameter<35 μ m.
Secondly, according to the form below 1 form with trimeric cyanamide melamine salt and ammonium polyphosphate with lubricant, coupling agent, become charcoal promotor to put into to mix 1~10 minute in the high speed mixer, can obtain halogen-free expansion fire retardant for polypropylene.
Table 1 polypropylene halogen-free flame retardants proportioning
Figure G200610112927XD00041
Figure G200610112927XD00051
C in the table 18Be stearic acid; C 18The Zn Zinic stearas; C 18Ca is a calcium stearate; KH-550 is a kind of product of γ-An Bingjisanyiyangjiguiwan; NDZ-101 is the monoalkoxytitanates coupling agent; ZQ-560 is a kind of product of γ-glycidyl ether oxygen propyl trimethoxy silicane; TiO 2Be titanium dioxide; PA-6 is a nylon 6.
Polypropylene granules or powder and the composite halogen-free flame retardants that forms are put in the high speed mixer, the stearic acid or the Zinic stearas (improving the apparent property and the processing characteristics of polymkeric substance) that add the white oil and 0.5% (wt) of 0.2% (wt) simultaneously, thorough mixing 1~10 minute. granulation in twin screw extruder machine then, extrusion is provided with vacuum exhaust, makes moulded product with injection moulding machine then.
When fire retardant of the present invention is used for polypropylene flame redardant powder or pellet, minimum 21% (wt) that reach of addition, flame retardant rating all reaches the UL94V-0 level, and the processing characteristics of polypropylene flame redardant is good.Compare with bromine system that the halogen-free polypropylene flame redardant smoke density is low, the amount of being fuming is few, mass loss rate is little, remaining quality is big.Compare with the flame retardant effect of the fire retardant of other kind, the results are shown in following table:
Several polypropylene of table 2 flame retardant effect contrast table of fire retardant
The fire retardant kind The auxiliary agent kind Addition Flame retardant rating
Bromide fire retardant Sb 2O 3 40% UL94V-0
Al(OH) 3 - 60% UL94V-0
Mg(OH) 2 - 65% UL94V-0
IFR The self-control composite assistant 21% UL94V-0
Annotate: IFR is a complex intumescent flame retardant of the present invention.

Claims (7)

1. halogen-free expansion fire retardant for polypropylene is characterized in that: by trimeric cyanamide melamine salt, ammonium polyphosphate, lubricant, coupling agent with become that charcoal promotor is composite to be formed, the per-cent of each ingredients constitute fire retardant gross weight is in the fire retardant,
Trimeric cyanamide melamine salt 14%~90%,
Ammonium polyphosphate 9%~85%,
Lubricant 0.1%~2%,
Coupling agent 0.1%~2%,
Become charcoal promotor 0.1%~5%;
Wherein, the structural formula of trimeric cyanamide melamine salt is:
The structural formula of ammonium polyphosphate is:
Figure F200610112927XC00012
In the formula: 2000<n<10000
Lubricant is stearic acid, Zinic stearas or calcium stearate;
Coupling agent is the silicane material;
Becoming charcoal promotor is SiO 2, TiO 2Or PA-6.
2. halogen-free expansion fire retardant for polypropylene according to claim 1 is characterized in that: coupling agent is γ-glycidyl ether oxygen propyl trimethoxy silicane or γ-An Bingjisanyiyangjiguiwan.
3. halogen-free expansion fire retardant for polypropylene according to claim 1 is characterized in that: the weight percent of trimeric cyanamide melamine salt is 25%~60% in the fire retardant.
4. halogen-free expansion fire retardant for polypropylene according to claim 1 is characterized in that: the weight percent of ammonium polyphosphate is 20%~70% in the fire retardant.
5. halogen-free expansion fire retardant for polypropylene according to claim 1 is characterized in that: the weight percent of lubricant is 0.5%~2% in the fire retardant.
6. halogen-free expansion fire retardant for polypropylene according to claim 1 is characterized in that: the weight percent of coupling agent is 0.5%~2% in the fire retardant.
7. halogen-free expansion fire retardant for polypropylene according to claim 1 is characterized in that: becoming the weight percent of charcoal promotor in the fire retardant is 0.5%~4%.
CN200610112927A 2006-09-13 2006-09-13 Halogen-free intumescent flame retardant for polypropylene Active CN101143947B (en)

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CN102134351B (en) * 2011-04-09 2012-09-26 太原理工大学 Preparation method of antiflaming polypropylene composite material
CN106893140B (en) * 2017-01-19 2019-04-09 北京化工大学 A kind of preparation method of the Novel Intumescent Flame Retardant based on supramolecular materials
CN107415355A (en) * 2017-07-27 2017-12-01 合肥伊只门窗有限公司 A kind of fire protection flame retarding composite fire door
CN116478472A (en) * 2023-03-31 2023-07-25 天津金发新材料有限公司 Thin-wall flame-retardant modified PP material with high ignition temperature and preparation and application thereof

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Publication number Priority date Publication date Assignee Title
US3936416A (en) * 1973-07-24 1976-02-03 Phillips Petroleum Company Nonburning, nondripping, char-forming, polypropylene composition
US4480093A (en) * 1983-05-23 1984-10-30 Borg-Warner Chemicals, Inc. Amines salts of phosphoric acid
US4966931A (en) * 1988-01-29 1990-10-30 Chisso Corporation Flame-retardant polypropylene resin composition
CN1335332A (en) * 2001-08-28 2002-02-13 巴陵石化岳阳石油化工总厂 Halogen-free intumescent flame retardant composition for polyolefin
CN1721423A (en) * 2004-07-16 2006-01-18 中国石油天然气集团公司 Process for synthesis of melamine salt of pentaerythritol bis (dihydrogen phosphate)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936416A (en) * 1973-07-24 1976-02-03 Phillips Petroleum Company Nonburning, nondripping, char-forming, polypropylene composition
US4480093A (en) * 1983-05-23 1984-10-30 Borg-Warner Chemicals, Inc. Amines salts of phosphoric acid
US4966931A (en) * 1988-01-29 1990-10-30 Chisso Corporation Flame-retardant polypropylene resin composition
CN1335332A (en) * 2001-08-28 2002-02-13 巴陵石化岳阳石油化工总厂 Halogen-free intumescent flame retardant composition for polyolefin
CN1721423A (en) * 2004-07-16 2006-01-18 中国石油天然气集团公司 Process for synthesis of melamine salt of pentaerythritol bis (dihydrogen phosphate)

Non-Patent Citations (2)

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Title
李云东.聚磷酸铵阻燃剂的应用.云南化工32 4.2005,32(4),第51-54页.
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