CN112979914A - Graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge and preparation method thereof - Google Patents
Graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge and preparation method thereof Download PDFInfo
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 104
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 99
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000010439 graphite Substances 0.000 title claims abstract description 57
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 57
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 50
- 239000004814 polyurethane Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000006260 foam Substances 0.000 claims abstract description 22
- 239000004088 foaming agent Substances 0.000 claims abstract description 19
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 229920000570 polyether Polymers 0.000 claims abstract description 17
- 229920005862 polyol Polymers 0.000 claims abstract description 17
- 150000003077 polyols Chemical class 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract 4
- 238000003756 stirring Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 6
- 150000001412 amines Chemical class 0.000 claims description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 238000011417 postcuring Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 description 29
- 238000007373 indentation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 230000007613 environmental effect Effects 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004154 testing of material Methods 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229910001853 inorganic hydroxide Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention relates to a graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge and a preparation method thereof, wherein the graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge is composed of a raw material A component and a raw material B component; wherein the component A comprises: 50-60 parts of combined polyether polyol, 0.1-0.3 part of foam stabilizer, 0.1-0.3 part of catalyst, 9-10 parts of reactive liquid flame retardant, 10-20 parts of expandable graphite, 10-20 parts of powdery flame retardant and 2-8 parts of foaming agent; the component B is modified MDI; the mixing ratio of the component A to the component B is 100: 56-65, the filled graphite type flame-retardant polyurethane sponge can reach the fire standard of EN45545R21HL2 grade through detection, and can reach the fire standard of DIN5510 and TB3237 compared with the traditional flame-retardant polyurethane sponge.
Description
Technical Field
The invention belongs to the technical field of sponge products, and particularly relates to a graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge and a preparation method thereof.
Background
Polyurethane materials are "conspicuous sitting feel" due to their; hand feeling; good air permeability and flame retardant property, and the like, and is widely applied to various industries. But as one of the polyurethane soft foams, the flame retardant property is poor, so that the safe use of the polyurethane soft foam in individual industries is limited. Polyurethane sponge mainly used for soft package seats of railway vehicles is used as a main body cushion material, the requirement on the flame retardant property of materials in the industry of public transportation railway vehicles is gradually improved in recent years, the fire-proof standard is changed from national standard to European standard, and the flame retardant property of common polyurethane materials cannot meet the requirement.
The addition of the flame retardant is an effective method for improving the flame retardant performance of polyurethane foam, and the flame retardant added in the existing polyurethane flexible foam is mainly solid additive type flame retardant melamine, liquid additive type phosphate flame retardant and the like. However, the traditional flame retardant has some problems at present, such as the environmental problems of large smoke production amount, smoke toxicity and the like of the halogen phosphorus flame retardant; the inorganic hydroxide flame retardant has the problems of large addition amount, deterioration of physical properties of materials and the like, and cannot meet the flame retardant requirement of the rail transit field on the materials.
Therefore, it is necessary to research an environment-friendly and efficient flame retardant system. And because of the particularity of the structure and the molecular weight of the polyurethane flexible foam, the difficulty of achieving the EN45545R21HL 2-level flame retardant effect is far higher than that of the common flame retardant sponge.
Disclosure of Invention
In view of the above problems, the present invention provides a graphite-filled polyurethane sponge with high flame retardancy and high resilience and a preparation method thereof, which is used for improving the flame retardancy of the polyurethane sponge to overcome the above disadvantages of the prior art.
The graphite-filled efficient flame-retardant polyurethane sponge provided by the invention is composed of a component A and a component B; wherein the component A comprises: 50-60 parts of combined polyether polyol, 0.1-0.3 part of foam stabilizer, 0.1-0.3 part of catalyst, 9-10 parts of reactive liquid flame retardant, 10-20 parts of expandable graphite, 10-20 parts of powdery flame retardant and 2-8 parts of foaming agent; the component B is modified MDI; the mixing ratio of the component A to the component B is 100: 56-65.
Preferably, the component A comprises: 55 parts of combined polyether polyol, 0.2 part of foam stabilizer, 0.2 part of catalyst, 9.5 parts of reactive liquid flame retardant, 15 parts of expandable graphite, 15 parts of powdery flame retardant and 2 parts of foaming agent.
Preferably, the mixing ratio of the component A to the component B is 100:60.
Preferably, the foam stabilizer is a polyurethane siloxane system foam stabilizer.
Preferably, the catalyst is an environment-friendly reactive amine catalyst.
Preferably, the reactive liquid flame retardant is a reactive flame retardant containing hydroxyl groups.
Preferably, the powdery flame retardant is Meinaiming brand flame retardant powder.
Preferably, the polyether polyol with high activity and high molecular weight of 6000-10000 is adopted as the combined polyether polyol, and 100-400# high expansion graphite is adopted as the expandable graphite.
Preferably, the foaming agent is an environment-friendly foaming agent.
The invention also aims to provide a preparation method of the graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge, which comprises the following steps:
step S1: mixing and stirring 50-60 parts of combined polyether polyol, 0.1-0.3 part of foam stabilizer, 0.1-0.3 part of catalyst, 9-10 parts of reactive liquid flame retardant, 10-20 parts of expandable graphite, 10-20 parts of powdery flame retardant and 2-8 parts of foaming agent in the component A fully according to the proportion at the stirring speed of 1000-3000R/min for 1-1.5h at normal temperature;
step S2: respectively injecting the component A and the component B into a low-pressure foaming agent charging bucket, ensuring that the temperature in the component A is 28-35 ℃ and the temperature in the component B is 18-25 ℃, and then mixing the component A and the component B according to the mixing ratio of 100: 56-65, the mixture is injected into a mould, the temperature of the mould is 40-60 ℃, the curing time is 10-15min, then the mould is opened, the part is taken out, the exhaust is carried out after the part is taken out, and the post-curing time is more than 24h, so that the graphite-filled high-efficiency flame-retardant polyurethane sponge is prepared.
The invention has the advantages and positive effects that:
1. the graphite-filled flame-retardant polyurethane sponge can reach the fire standard of EN45545R21HL2 grade through detection, and can reach the fire standards of DIN5510 and TB3237 compared with the traditional flame-retardant polyurethane sponge.
2. The invention prepares the high-efficiency flame-retardant high-resilience polyurethane sponge by adopting a method of using high-expansion expandable graphite in combination with a reactive liquid flame retardant and a powdery flame retardant. The flame retardant property of the sponge product can be greatly improved by adding a small amount of high-multiple expandable graphite and environment-friendly powdery flame retardant instead of melamine as a solid flame retardant, and meanwhile, a small amount of reactive flame retardant is added, so that the using amount of the additive flame retardant is reduced, and the reduction of the fireproof property of the sponge product due to time problems can be avoided in the using process.
3. The two flame retardants can play a good synergistic role, greatly improve the flame retardant property of the polyurethane sponge, achieve the flame retardant effect which can reach the European standard EN45545R21HL 2-level fireproof standard, and simultaneously ensure that the sponge product has certain physical properties of usability. When the high-expansion expandable graphite meets fire, the high-expansion expandable graphite can expand rapidly at high temperature and cover the surface of a product, so that the effect of isolating air is achieved, and the high-efficiency flame retardant property of the high-expansion expandable graphite is achieved.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is a schematic diagram according to an embodiment of the present invention.
FIG. 2 is a graph of heat release rate versus time in accordance with an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
Example 1
Referring to fig. 1, the graphite-filled high-efficiency flame-retardant polyurethane sponge provided by the invention is composed of a component A and a component B.
The component A in the embodiment comprises: 55 parts of combined polyether polyol, 0.15 part of foam stabilizer, 0.15 part of catalyst, 10 parts of reactive liquid flame retardant, 12 parts of expandable graphite, 11 parts of powdery flame retardant and 2 parts of foaming agent; the component B in this example is modified MDI. Wherein the mixing ratio of the component A to the component B is 100: 65.
The foam stabilizer in this example was a polyurethane siloxane system foam stabilizer.
The catalyst in this example was an environmentally friendly reactive amine catalyst.
The reactive liquid flame retardant in this example was a reactive flame retardant containing a hydroxyl group.
The powdery flame retardant in the embodiment adopts Meinaiming brand flame retardant powder.
The combined polyether polyol in the embodiment adopts polyether polyol with high activity and high molecular weight of 6000-10000.
The expandable graphite in the embodiment adopts 100-400# high expansion graphite.
Blowing agent in this example: an environment-friendly foaming agent.
Example 2
The embodiment provides a preparation method of a graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge, which specifically comprises the following steps:
step S1: fully mixing and stirring 50 parts of combined polyether polyol, 0.15 part of foam stabilizer, 0.15 part of catalyst, 10 parts of reactive liquid flame retardant, 12 parts of expandable graphite, 11 parts of powdery flame retardant and 2 parts of foaming agent in the component A at the stirring speed of 1000-3000R/min, stirring at normal temperature for 1-1.5h, and preparing a proper amount of the component B;
step S2: respectively injecting the component A and the component B into a low-pressure foaming agent charging bucket, ensuring that the temperature in the component A is 28-35 ℃ and the temperature in the component B is 18-25 ℃, and then mixing the component A and the component B according to the mixing ratio of 100: 56, mixing and injecting into a mould, wherein the temperature of the mould is 40-60 ℃, the curing time is 10-15min, then opening the mould and taking out a part, exhausting after taking out the part, and the post-curing time is more than 24h to prepare the graphite-filled type efficient flame-retardant polyurethane sponge, and carrying out fire prevention detection on the graphite-filled type efficient flame-retardant polyurethane sponge prepared by the method, wherein the graphite-filled type efficient flame-retardant polyurethane sponge passes the EN45545R21HL2 level flame-retardant fire-proof standard.
Example 3
Step S1: 55 parts of combined polyether polyol, 0.1 part of foam stabilizer, 0.1 part of catalyst, 9 parts of reactive liquid flame retardant, 10 parts of expandable graphite, 10 parts of powdery flame retardant and 2 parts of foaming agent in the component A are fully mixed and stirred at the stirring speed of 1000-3000R/min, and stirred at normal temperature for 1-1.5h, and a proper amount of component B is prepared;
step S2, preparing a graphite-filled type highly efficient flame retardant polyurethane sponge as in example 1; the filled graphite type high-efficiency flame-retardant polyurethane sponge prepared by the method is subjected to fire-retardant detection, and passes the EN45545R21HL 2-level flame-retardant fire-retardant standard.
Example 4
Step S1: mixing and stirring 60 parts of combined polyether polyol, 0.3 part of foam stabilizer, 0.3 part of catalyst, 10 parts of reactive liquid flame retardant, 20 parts of expandable graphite, 20 parts of powdery flame retardant and 2 parts of foaming agent in the component A fully according to the proportion, stirring at the stirring speed of 1000-3000R/min, stirring at normal temperature for 1-1.5h, and preparing a proper amount of component B;
step S2, preparing a graphite-filled type highly efficient flame retardant polyurethane sponge as in example 1; the filled graphite type high-efficiency flame-retardant polyurethane sponge prepared by the method is subjected to fire-retardant detection, and passes the EN45545R21HL 2-level flame-retardant fire-retardant standard.
Example 5
The graphite-filled high-efficiency flame-retardant polyurethane sponge prepared in example 2 was subjected to a fire test in the following manner:
the detection method is carried out according to T03.02 ISO 5660-1:2015/Amd 1:2019 burn test-heat release, smoke production and mass loss rate part 1-heat release rate (cone calorimeter method) and smoke production rate (dynamic measurement).
Second, traceability records
1) Pretreatment of
| Temperature of | 23.3℃ | Relative humidity | 53％R.H. |
| Starting time | 2020.12.22 | End time | 2020.12.29 |
2) Test environment
| Temperature of | 23.1℃ | Relative humidity | 52％R.H. |
Third, the detection result
The graph is shown in FIG. 2
Fourth, conclusion
The detection shows that the material meets the related HL1/HL2/HL3 danger level in the table of R21, and meets the EN45545R21HL2 grade flame-retardant fire-proof standard.
Example 6
The graphite-filled high-efficiency flame-retardant polyurethane sponge prepared in the example 2 is subjected to indentation hardness, indentation ratio and dynamic fatigue tests, and the detection method is as follows:
first, detection requirement
II, test item 1: indentation hardness of 25%
1. Test equipment
| Device name | Model number |
| Double-column material testing machine | 5965 |
2. Environmental conditions
| Temperature of | 22.3℃ | Humidity | 54％RH |
3. And (4) testing standard: GB/T10807-
4. Test conditions
Test according to method B, the sample is compressed by 25% and held for 30s
5. Test results
| Test sample | Test results (N) |
| A2200475321101001 | 166 |
| Specification value | 220±10 |
| Determination | Conform to |
Third, test item 2: ratio of indentation force value
1. Test equipment
| Device name | Model number |
| Double-column material testing machine | 5965 |
2. Environmental conditions
| Temperature of | 22.3℃ | Humidity | 54％RH |
3. And (4) testing standard: GB/T10807-
4. And (3) testing conditions are as follows: the indentation ratio, as measured by method B, is the ratio of 65% indentation force divided by 25% indentation force
5. Test results
Fourth, test item 3: maximum loss rate of 40% indentation hardness
1. Test equipment
| Device name | Model number |
| Double-column material testing machine | 5965 |
| Soft foam compressor | GT-7063-F |
2. Environmental conditions
| Temperature of | 22.3℃ | Humidity | 54％RH |
3. And (4) testing standard: QB/T2819-2006
4. And (3) testing conditions are as follows: applying pressure: 750N, cycle number: 80000 times, the maximum loss rate of 40% indentation hardness was calculated.
5. Test results
| Test sample | Results of measurement (% |
| A2200475321101001 | 16 |
| Specification value | ≤17 |
| Determination | Conform to |
Fifth, conclusion
The detection shows that the materials all meet the test standard.
Example 7
The filled graphite type high-efficiency flame-retardant polyurethane sponge prepared in example 2 was subjected to a rebound resilience test in the following manner:
detecting content
1. Rebound rate (GB/T6670-2008)
2. Results
Example 8
The graphite-filled high-efficiency flame-retardant polyurethane sponge prepared in example 2 was subjected to a compression set test in the following manner:
firstly, detecting items: compression set
1. Test equipment
| Device name | Model number |
| High-temperature test chamber | PHH201 |
| Compression set | / |
2. Environmental conditions
| Temperature of | 23.3℃ | Humidity | 52％RH |
3. And (4) testing standard: GB/T6669-
4. And (3) testing conditions are as follows: the sample was compressed to 75% and left at 70 ℃ for 22h with a recovery time of 30 min.
5. Test results
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge is characterized by comprising a raw material A component and a raw material B component; wherein the component A comprises: 50-60 parts of combined polyether polyol, 0.1-0.3 part of foam stabilizer, 0.1-0.3 part of catalyst, 9-10 parts of reactive liquid flame retardant, 10-20 parts of expandable graphite, 10-20 parts of powdery flame retardant and 2-8 parts of foaming agent; the component B is modified MDI; the mixing ratio of the component A to the component B is 100: 56-65.
2. The filled graphite type efficient flame-retardant high-resilience polyurethane sponge as claimed in claim 1, wherein the component A comprises: 55 parts of combined polyether polyol, 0.2 part of foam stabilizer, 0.2 part of catalyst, 9.5 parts of reactive liquid flame retardant, 15 parts of expandable graphite, 15 parts of powdery flame retardant and 2 parts of foaming agent.
3. The filled graphite type polyurethane sponge with high efficiency, flame retardance and high resilience as claimed in claim 1, wherein the mixing ratio of the component A to the component B is 100:60.
4. The graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge according to the claims 1-3, wherein the foam stabilizer is a polyurethane siloxane system foam stabilizer.
5. The filled graphite type efficient flame-retardant high-resilience polyurethane sponge as claimed in claims 1-3, wherein the catalyst is an environmentally-friendly reactive amine catalyst.
6. The filled graphite type high-efficiency flame-retardant high-resilience polyurethane sponge as claimed in claims 1 to 3, wherein the reactive liquid flame retardant is a reactive flame retardant containing hydroxyl groups.
7. The filled graphite type high-efficiency flame-retardant high-resilience polyurethane sponge as claimed in claims 1-3, wherein the powdery flame retardant is Meinaiming brand flame-retardant powder.
8. The filled graphite type polyurethane sponge with high flame retardancy and high resilience as claimed in claims 1-3, wherein the polyether polyol with high activity and high molecular weight 6000-10000 is used as the combined polyether polyol, and the expandable graphite is 100-400# high expansion graphite.
9. The filled graphite type efficient flame-retardant high-resilience polyurethane sponge as claimed in claims 1-3, wherein the foaming agent is an environment-friendly foaming agent.
10. A preparation method of a graphite-filled high-efficiency flame-retardant high-resilience polyurethane sponge is characterized by comprising the following steps:
step S1: mixing and stirring 50-60 parts of combined polyether polyol, 0.1-0.3 part of foam stabilizer, 0.1-0.3 part of catalyst, 9-10 parts of reactive liquid flame retardant, 10-20 parts of expandable graphite, 10-20 parts of powdery flame retardant and 2-8 parts of foaming agent in the component A fully according to the proportion at the stirring speed of 1000-3000R/min for 1-1.5h at normal temperature;
step S2: respectively injecting the component A and the component B into a low-pressure foaming agent charging bucket, ensuring that the temperature in the component A is 28-35 ℃ and the temperature in the component B is 18-25 ℃, and then mixing the component A and the component B according to the mixing ratio of 100: 56-65, the mixture is injected into a mould, the temperature of the mould is 40-60 ℃, the curing time is 10-15min, then the mould is opened, the part is taken out, the exhaust is carried out after the part is taken out, and the post-curing time is more than 24h, so that the graphite-filled high-efficiency flame-retardant polyurethane sponge is prepared.
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