CN107903528B - Flame-retardant sheet for space leasing and preparation method thereof - Google Patents
Flame-retardant sheet for space leasing and preparation method thereof Download PDFInfo
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- CN107903528B CN107903528B CN201710982215.1A CN201710982215A CN107903528B CN 107903528 B CN107903528 B CN 107903528B CN 201710982215 A CN201710982215 A CN 201710982215A CN 107903528 B CN107903528 B CN 107903528B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2201/02—Flame or fire retardant/resistant
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Abstract
The invention discloses a flame-retardant sheet material for space leasing and a preparation method thereof, which comprises the steps of mixing polyvinyl chloride, a filling agent, a stabilizing agent, stearic acid, an ACR modifier and a flame-retardant smoke suppressant, and then carrying out extrusion molding; wherein the flame-retardant smoke suppressant is prepared by reacting a compound having R as shown in formula (I)1And R2The substituted phosphinate, tributyltin and tri-n-octylphosphine oxide are prepared after heating and contacting at the temperature of 200-300 ℃; wherein, in formula (I): r1Is C1-C6 alkyl or phenyl; r2Is C1-C6 alkyl or phenyl; m is a metal element, and n is a number from 1 to 4. The flame retardant in the plate does not lose flame retardant property in the high-temperature processing process, and does not generate brittle substances, so that the plate is good in mechanical property, flame retardant, environment-friendly and high in popularization and application value.
Description
Technical Field
The invention relates to a flame-retardant sheet material, in particular to a flame-retardant sheet material for space leasing and a preparation method thereof.
Background
With the development of economic society and the acceleration of pace of life and work, most office areas are no longer fixed reinforced concrete houses, and more office spaces are divided in a building, and the office spaces are rented to target customers in a renting mode. Since these spaces often contain a large number of people, fire resistance is the most important requirement for rental space. Common flame-retardant smoke inhibitors include aluminum hydroxide, cerium hydroxide, magnesium hydroxide, halogen flame-retardant smoke inhibitors, phosphinates, polycyanum and the like, and although the halogen flame-retardant smoke inhibitors commonly used at present are still widely used, the harm to human health and environment is more and more concerned due to the problems of dioxin generation during combustion and toxic gas generation after fire. At present, the phosphinate has the advantages of small dosage, low smoke density, no environmental hazard and the like, and is more and more concerned by people. However, the patent document US 2007/0029532 discloses that phosphonates may cause decomposition during processing and generate brittle unusable substances during processing, thus limiting the use of phosphonates as flame retardant smoke suppressants.
Patent document CN107207779A, entitled: flame retardant polymer compositions comprising heat treated phosphorus compounds and melam disclose that flame retardant smoke suppressants obtained by heating certain phosphonates at 200 ℃ or higher, and melam or melam derivatives as flame retardant synergists, can be readily processed under certain severe conditions by incorporation into the polymer. However, the melam or melam derivatives are not easy to synthesize, so that the application cost of the flame-retardant smoke suppressant added with melam is increased.
Therefore, it is a technical problem to be solved urgently at present how to provide a flame-retardant smoke suppressant and a panel containing the same, which reduce the production cost of the material, improve the flame-retardant performance of the material in the application material, do not produce fragile substances, and do not reduce the influence on the mechanical properties, especially the toughness, of the main material substrate on the basis of ensuring the advantages of low smoke density, no environmental hazard and the like.
Disclosure of Invention
The flame-retardant board for space renting contains a flame-retardant smoke suppressant, and the flame-retardant smoke suppressant can improve the flame-retardant performance of the flame-retardant smoke suppressant in application materials on the basis of keeping the advantages of low smoke density, no environmental hazard and the like of phosphinate, does not generate fragile substances, does not reduce the influence on the mechanical properties of main material matrixes, and is more economical in used auxiliaries.
In order to realize the purpose, the invention provides a preparation method of a flame-retardant plate for space leasing, which comprises the steps of mixing polyvinyl chloride, a filling agent, a stabilizing agent, stearic acid, an ACR modifier and a flame-retardant smoke suppressant, and then carrying out extrusion molding; wherein the flame-retardant smoke suppressant is prepared by reacting a compound having R as shown in formula (I)1And R2The substituted phosphinate, tributyltin and tri-n-octylphosphine oxide were heated at 200 ℃ and 300 ℃After contacting, preparing; wherein, in formula (I): r1Is C1-C6 alkyl or phenyl; r2Is C1-C6 alkyl or phenyl; m is a metal and n is a number from 1 to 4, such that Mn+Is a metal cation, where n + represents the charge formally assigned to the cation, and n is a number from 1 to 4.
The invention also provides the flame-retardant sheet material for space leasing, which is prepared by the preparation method.
The flame-retardant smoke suppressant in the flame-retardant sheet material for space leasing does not lose flame-retardant property in the high-temperature processing process, and the generation of fragile substances is not found, so that the obtained flame-retardant sheet material has good mechanical property, is flame-retardant and is environment-friendly. The flame-retardant sheet for space leasing can be used for dividing space to manufacture leased office space, and can greatly meet the requirements of the existing leasing space on flame retardance, environmental protection and durability. The flame-retardant sheet material for space leasing is low in cost, and can indirectly reduce the manufacturing cost of the leasing space, so that the flame-retardant sheet material has high popularization and application values.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a flame-retardant smoke suppressant which is represented by the formula (I) and has the R1And R2The substituted phosphinate, tributyltin and tri-n-octylphosphine oxide are prepared after heating and contacting at the temperature of 200-300 ℃; wherein, in formula (I): r1Is C1-C6 alkyl or phenyl; r2Is C1-C6 alkyl or phenyl; m is a metal and n is a number from 1 to 4, such that Mn+Is a metal cation, where n + represents the charge formally assigned to the cation, and n is a number from 1 to 4.
According to the selection of the raw material types and the preparation process of the technical scheme, the flame-retardant smoke suppressant can be obtained by a person skilled in the art. The flame-retardant smoke suppressant provided by the invention can improve the flame retardant property of phosphinate in application materials on the basis of keeping the advantages of low smoke density, no environmental hazard and the like of the phosphinate, does not generate fragile substances, and does not reduce the influence on the mechanical properties of main material matrixes. The flame retardant performance of the flame retardant and smoke suppressant can be improved by the melamine. The preparation raw materials of the flame-retardant smoke suppressant are low in price and easy to obtain, so that the flame-retardant smoke suppressant has higher popularization and application values.
In the above technical scheme, the compound shown as the formula (I) has R1And R2The substituted phosphinate has a relatively mature synthesis method at present, such as a Grignard reagent method, an aluminum chloride catalytic reaction, a free radical addition method, a metal complex catalytic addition method and the like, and all the substituted phosphinate products are commercially available products. Phosphinates having R1 and R2 substituents as shown in the examples hereinafter of the present invention are all available from Deqing Sihai chemical Co., Ltd.
The flame retardant smoke suppressant of the present invention can be added to various raw materials for producing polymers such as plastics or rubbers to obtain target materials for improving the flame retardancy of the materials, for example, to materials in which polyolefin homopolymers and copolymers, rubbers, polyesters, epoxy resins, polyurethanes, polyalkylene terephthalates, polysulfones, polyimides, polyphenylene ethers, styrene polymers and copolymers, polycarbonates, acrylic polymers, polyamides, polyacetals, epoxy resins are main substrates.
In the process, the phosphinate with R1 and R2 substituents in the flame-retardant smoke suppressant disclosed by the invention as shown in the formula (I) does not lose the flame-retardant property in the high-temperature processing process, and no brittle substances are generated in the applied materials. Hereinafter, the application of the flame retardant and smoke suppressant of the present invention to a material mainly composed of polyvinyl chloride will be described.
In the present invention, in order to obtain the flame retardant and smoke suppressant with excellent flame retardant property, less fragile substances in the processed material and good mechanical properties of the processed material, the temperature of the heating contact is preferably 240-280 ℃.
In order to obtain the flame retardant and smoke suppressant with excellent flame retardant property, less fragile substances in the processed material and good mechanical property of the processed material, more preferably, the heating and contacting conditions comprise: having R as shown in formula (I)1And R2The substituted phosphinate, tributyltin and tri-n-octylphosphine oxide are mixed for 20-30min at the temperature of 240-280 ℃, and then are subjected to heat preservation for 1.5-2.5h at the temperature of 260-280 ℃.
In the present invention, R in the formula (I)1And/or R2May be an alkyl group or a phenyl group substituted with one of various substituents such as one or more of nitro, halo, hydroxy, amino, and the like.
In the present invention, preferably, the alkyl group is an alkyl group which is unsubstituted or substituted by one or more of halogen, hydroxyl, amino.
In the above technical scheme, the type of the alkyl group can be selected in various ways, and can be a straight chain alkyl group or a branched chain alkyl group. The position of the alkyl group substituted by the substituent may be variously selected, and may be substituted at the 1-position or the 2-6-position. And the number of the substituted substituents can be selected in various ways, for example, the invention can be realized by single substitution or multiple substitution.
The position of the phenyl substituted by the substituent can be selected in various ways, and ortho-substitution, meta-substitution and para-substitution can all realize the invention. And the number of the substituted substituents can be selected in various ways, for example, the invention can be realized by single substitution or multiple substitution.
In order to reduce the production of toxic gases containing halogens by high-temperature combustion, it is more preferable that the alkyl group is free of halogen substituents, and the alkyl group is unsubstituted or substituted by one or more of hydroxyl and amino.
In the present invention, preferably, the phenyl group is a phenyl group which is unsubstituted or substituted by one or more of halogen, hydroxyl, amino.
In order to reduce the production of toxic gases containing halogens during high-temperature combustion, it is more preferable that the alkyl group does not contain a halogen substituent, and the phenyl group is an alkyl group which is unsubstituted or substituted by one or more of a hydroxyl group and an amino group.
M in formula (I) may be a conventional metal element, preferably M in formula (I) is L i, K, Na, Mg, Ca, Ba, Zn, Zr, B, Al, Si, Ti, Sn or Sb, in order to make the phosphinate salt having R1 and R2 substituents shown in formula (I) inexpensive and readily available.
In the present invention, more preferably, M is Ca or Al in order to make the phosphinate having R1 and R2 substituents shown in formula (I) inexpensive and readily available.
In the present invention, the compound represented by the formula (I) has R1And R2The weight ratio of the substituted phosphinate, tributyltin and tri-n-octylphosphine oxide can be adjusted in a wide range, and the flame-retardant smoke suppressant can be obtained. In order to obtain the material with excellent flame retardant property after processingThe flame-retardant smoke suppressant has less fragile substances and good mechanical properties of the processed material, and is represented by the formula (I) and R1And R2The weight ratio of substituted phosphinate, tributyltin and tri-n-octylphosphine oxide is 10: 1-3: 8-10.
The invention also provides a flame-retardant smoke suppressant prepared according to the preparation method of the flame-retardant smoke suppressant.
Through the technical scheme, the flame-retardant smoke suppressant provided by the invention can improve the flame-retardant property of the phosphinate in application materials on the basis of keeping the advantages of low smoke density, no environmental hazard and the like of the phosphinate, does not generate fragile substances, and does not reduce the influence on the mechanical property of a main material matrix. The preparation raw materials of the flame-retardant smoke suppressant are cheap and easy to obtain, so that the flame-retardant smoke suppressant has higher popularization and application values.
The invention also provides a preparation method of the flame-retardant plate for space leasing, which comprises the steps of mixing the polyvinyl chloride, the filling agent, the stabilizing agent, the stearic acid, the ACR modifier and the flame-retardant smoke suppressant, and then carrying out extrusion molding; wherein, the flame-retardant smoke-suppressing agent is the flame-retardant smoke-suppressing agent provided by the invention.
In the process, the flame-retardant smoke suppressant in the flame-retardant sheet for space renting disclosed by the invention cannot lose flame-retardant property in a high-temperature processing process, and the generation of fragile substances is not found, so that the obtained flame-retardant sheet is good in mechanical property, flame-retardant and environment-friendly.
Aiming at the current situation, the flame-retardant sheet material for space leasing can be used for dividing space to manufacture leased office space, and can greatly meet the requirements of the existing leased space on flame retardance, environmental protection and durability. The flame-retardant sheet material for space leasing is low in cost, and can indirectly reduce the manufacturing cost of the leasing space, so that the flame-retardant sheet material has high popularization and application values.
The raw materials in the flame-retardant sheet material for space lease can be adjusted in a wide range, and in order to obtain a sheet material with good mechanical properties and good flame-retardant effect, the flame-retardant sheet material is preferably composed of, by weight, 75-120 parts of polyvinyl chloride, 100 parts of a filler, 150 parts of a stabilizer, 2-7 parts of stearic acid, 0.5-1.2 parts of an ACR modifier and 15-25 parts of a flame-retardant smoke inhibitor.
The mixing conditions of the polyvinyl chloride, the filler, the stabilizer, the stearic acid, the ACR modifier and the flame-retardant smoke suppressant can be adjusted within a wide range by those skilled in the art, and in order to obtain a board material with good mechanical properties and flame retardance, the polyvinyl chloride, the filler, the stabilizer, the stearic acid, the ACR modifier and the flame-retardant smoke suppressant are preferably mixed under the following conditions: firstly, hot mixing at the temperature of 120 ℃ and 140 ℃, and then cold mixing at the temperature of 60-80 ℃. The mixing time of the materials can be adjusted within a wide range by those skilled in the art, and more preferably, the materials are firstly hot mixed at 120-140 ℃ for 1.5-2h and then cold mixed at 60-80 ℃ for 20-40 min.
The extrusion conditions can be adjusted within wide limits by the person skilled in the art, and the extrusion temperature is preferably 160 ℃ to 210 ℃.
And adjusting the size of the roller gap according to the thickness required by processing. And after the screw is fully plasticized, the sheet blank is extruded into the sheet blank by a narrow-seam machine head. And then the three-roller calender cools and shapes the product, and further cools the product by a guide roller at a certain distance, and then the product can be cut, rolled and molded. The extrusion molding machine is not particularly limited herein, and a conventional extrusion molding machine can be used.
The trade mark for polyvinyl chloride can be adjusted within wide limits by those skilled in the art, and in order to improve the processing effect, it is preferred that the polyvinyl chloride is of the type PVC-SG 5.
The filler can be adjusted within wide range by those skilled in the art, and in order to improve the processing effect, the filler is preferably one or more of heavy calcium carbonate, nano calcium carbonate, perlite, titanium dioxide and light calcium carbonate.
The stabilizer can be adjusted within a wide range by those skilled in the art, and in order to improve the thermal stability of the sheet, it is preferably a lead salt composite stabilizer, an organotin-based stabilizer, a calcium zinc composite stabilizer or a potassium zinc composite stabilizer.
The invention also provides the flame-retardant sheet for space renting, which is prepared according to the preparation method of the flame-retardant sheet for space renting.
In the process, the flame-retardant smoke suppressant in the flame-retardant sheet for space renting disclosed by the invention cannot lose flame-retardant property in a high-temperature processing process, and the generation of fragile substances is not found, so that the obtained flame-retardant sheet is good in mechanical property, flame-retardant and environment-friendly.
Furthermore, the flame-retardant sheet for space renting can be used for dividing space to manufacture rented office space, and can greatly meet the requirements of the existing rented space on flame retardance, environmental protection and durability. The flame-retardant sheet material for space leasing is low in cost, and can indirectly reduce the manufacturing cost of the leasing space, so that the flame-retardant sheet material has high popularization and application values.
The present invention will be described in detail below by way of examples.
Example 1
Preparing a flame-retardant plate for space leasing:
(1) preparing a flame-retardant smoke inhibitor: 10 parts by weight of phosphinates having substituents R1 and R2, as shown in formula (I), 1 part of tributyltin and 6 parts of tri-n-octylphosphine oxide are mixed at 240 ℃ for 20min, and then the mixture is kept at 260 ℃ for 1.5h, wherein R1Is methyl; r2Is phenyl, M is Al, n is 3, thus obtaining the flame-retardant smoke suppressant A1;
(2) according to parts by weight, 75 parts of PVC-SG5 type polyvinyl chloride, 100 parts of nano calcium carbonate, 2 parts of dimethyl tin oxide PVC stabilizer, 0.5 part of stearic acid, 2 parts of ACR K-123 modifier and 115 parts of flame-retardant smoke inhibitor A are hot-mixed for 1.5h at 120 ℃, then cold-mixed for 20min at 60 ℃, and then extruded and molded at 160 ℃.
Example 2
Preparing a flame-retardant plate for space leasing:
(1) preparing a flame-retardant smoke inhibitor: 10 parts by weight of phosphinates having substituents R1 and R2, as shown in formula (I), 2 parts by weight of tributyltin and 8 parts by weight of tri-n-octylphosphine oxide are mixed at 245 ℃ for 25min, and then the mixture is kept at 270 ℃ for 2h, wherein R is1Is n-propyl; r2Is isopropyl substituted by hydroxyl on 1 position, M is Al, n is 3, and the flame-retardant smoke suppressant A2 is obtained;
(2) based on parts by weight, 100 parts of PVC-SG5 type polyvinyl chloride, 125 parts of nano calcium carbonate, 4.5 parts of dimethyl tin oxide PVC stabilizer, 0.8 part of stearic acid, 2.8 parts of ACR K-123 modifier and 220 parts of flame-retardant smoke suppressant A are firstly hot-mixed for 1.2 hours at 130 ℃, then cold-mixed for 30 minutes at 70 ℃, and then extruded and molded at 180 ℃.
Example 3
Preparing a flame-retardant plate for space leasing:
(1) preparing a flame-retardant smoke inhibitor: 10 parts by weight of phosphinates having substituents R1 and R2, as shown in formula (I), 3 parts by weight of tributyltin and 10 parts by weight of tri-n-octylphosphine oxide are mixed at 250 ℃ for 30min, and then the mixture is kept at 280 ℃ for 2.5h, wherein R1Is n-hexyl substituted in position 6 by chlorine; r2Is methyl substituted by amino, M is Al, and n is 3, thus obtaining the flame-retardant smoke-suppressant A3.
(2) According to parts by weight, 120 parts of PVC-SG5 type polyvinyl chloride, 150 parts of nano calcium carbonate, 7 parts of dimethyl tin oxide PVC stabilizer, 1.2 parts of stearic acid, 3.5 parts of ACR K-123 modifier and 325 parts of flame-retardant smoke inhibitor A are firstly hot-mixed for 2 hours at 140 ℃, then cold-mixed for 40 minutes at 80 ℃ and then extruded and molded at 210 ℃.
Example 4
Preparing a flame-retardant plate for space leasing:
(1) preparing a flame-retardant smoke inhibitor: 10 parts by weight of phosphinates having substituents R1 and R2, as shown in formula (I), 2 parts by weight of tributyltin and 8 parts by weight of tri-n-octylphosphine oxide are mixed at 200 ℃ for 25min, and then the mixture is kept at 200 ℃ for 2h, wherein R1Is n-propyl; r2Is isopropyl substituted by hydroxyl on 1 position, M is Al, n is 3, and the flame-retardant smoke suppressant A4 is obtained;
(2) the procedure was followed as in step (2) of example 2, except that A4 was used as the flame-retardant smoke-suppressing agent.
Example 5
Preparing a flame-retardant plate for space leasing:
(1) preparing a flame-retardant smoke inhibitor: mixing 10 parts by weight of phosphinate with R1 and R2 substituents shown in formula (I), 2 parts by weight of tributyltin and 8 parts by weight of tri-n-octylphosphine oxide at 300 ℃ for 25min, and then preserving heat at 300 ℃ for 2h, wherein R1 is n-propyl; r2 is isopropyl substituted by hydroxyl on 1 position, M is Al, n is 3, and the flame-retardant smoke suppressant A5 is obtained;
(2) the procedure was followed as in step (2) of example 2, except that A5 was used as the flame-retardant smoke-suppressing agent.
Comparative example 1
A flame-retardant smoke suppressant was prepared according to the step (1) of example 2, except that the mixing temperature and the holding temperature were both 150 ℃, to obtain flame-retardant smoke suppressant B1. Flame retardant B1 flame retardant boards for space renting were prepared according to the step (2) in example 2.
Comparative example 2
A flame-retardant smoke suppressant was prepared according to the step (1) of example 2, except that the mixing temperature and the holding temperature were both 350 ℃, to obtain flame-retardant smoke suppressant B2. Flame retardant B2 flame retardant boards for space renting were prepared according to the step (2) in example 2.
Comparative example 3
10 parts of phosphinate with R1 and R2 substituents shown in the formula (I) in the step (1) of the example 2 are subjected to heat preservation at 270 ℃ for 2.4 hours to obtain the flame-retardant smoke suppressant B3. Flame retardant B3 flame retardant boards for space renting were prepared according to the step (2) in example 2.
Comparative example 4
10 parts of the phosphinate salt having R1 and R2 substituents of formula (I) in step (1) of example 2 was numbered as flame retardant and smoke suppressant B4. Flame retardant B4 flame retardant boards for space renting were prepared according to the step (2) in example 2.
Blank control
The flame-retardant sheet for space renting was prepared only according to the step (2) in example 2 without performing the step (1), except that no flame retardant was added to obtain a blank control polyvinyl chloride sheet.
Detection example 1
The flame-retardant plates for space renting obtained in examples 1-5 and comparative examples 1-4 are respectively numbered a1-a5 and b1-b4, the tensile strength and the impact toughness of the flame-retardant polyvinyl chloride plates a1-a5 and b1-b4 and the blank control polyvinyl chloride plates are analyzed, and the detection standards are as follows: samples were prepared and tested for tensile strength according to GB/T1040.3-2006, and impact toughness was tested using GB/T1043.1-2008.
The detection shows that the trend of the tensile strength and the impact toughness of each plate is not obviously changed relative to the trend of other plates, namely the tensile strength is high and the impact toughness is also high. Among them, significant brittle fracture occurred in b3 and b4, resulting in poor tensile strength and impact toughness, with b4 being the worst, only 20% of the blank; the tensile strength and the impact toughness of the b1 and the b2 are both better than those of the b3, no obvious brittle fracture occurs, but the tensile strength and the impact toughness are different from those of the blank control sample by about 50 percent.
The order of the tensile strength and impact toughness of the other samples from good to bad was: blank control, a2, a1, a3, a4 and a5, wherein a2 is close to the blank control, and the tensile strength and the impact toughness of the blank control are more than 98 percent of those of the blank control sample; the tensile strength and the impact toughness of the a1 and the a3 are about 95 percent of those of the blank control sample; the tensile strength and the impact toughness of the a4 and the a5 are more than 88 percent of that of the blank control sample; the tensile strength of the blank control was 62 MPa.
Detection example 2
The flame-retardant plates for space renting obtained in examples 1-5 and comparative examples 1-4 are respectively correspondingly numbered as a1-a5 and b1-b4, and the oxygen index and the smoke density of a1-a5 and b1-b4 flame-retardant polyvinyl chloride plates and blank control polyvinyl chloride plates are analyzed, wherein the standard of the oxygen index test is GB/T2406.2-2009; the test standard of the smoke density is GB/T8627-2007.
The results show that the oxygen indexes of a1-a5 are all more than 27 percent and belong to flame retardants. Specifically, the oxygen indexes of a3, a2, a4, a5 and a1 are sequentially from high to low, the oxygen index of a3 reaches 42%, the oxygen index of a1 is 35%, the oxygen indexes of b1-b4 are not greatly different and are all about 29%, and the oxygen index of a blank control sample is 18%.
The results show that the smoke densities of a1-a5 are not very different and are all below 45 SDR, the smoke densities of b1-b4 are between 49 and 58SDR, and the smoke density of the blank control is 67 SDR.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. A preparation method of a flame-retardant plate for space renting is characterized by comprising the steps of mixing polyvinyl chloride, a filling agent, a stabilizing agent, stearic acid, an ACR modifier and a flame-retardant smoke suppressant, and then carrying out extrusion molding;
wherein the flame-retardant smoke suppressant is prepared by reacting a compound having R as shown in formula (I)1And R2The substituted phosphinate, tributyltin and tri-n-octylphosphine oxide are prepared after heating and contacting at the temperature of 200-300 ℃;
wherein, in formula (I): r1Is C1-C6 alkyl or phenyl; r2Is C1-C6 alkyl or phenyl; m is Al, n is 3, such that Mn+Is a metal cation, wherein n + represents a charge formally assigned to the cation, and n is 3;
wherein (I) is represented by the formula1And R2The weight ratio of the substituted phosphinate, tributyltin and tri-n-octylphosphine oxide is10：1-3：8-10；
Wherein, the mixing conditions of the polyvinyl chloride, the filling agent, the stabilizing agent, the stearic acid, the ACR modifier and the flame-retardant smoke suppressant are as follows: firstly, hot mixing at the temperature of 120-140 ℃, and then cold mixing at the temperature of 60-80 ℃; and/or the temperature of extrusion molding is 160-210 ℃;
wherein, the weight portion is 75-120 portions of polyvinyl chloride, 150 portions of filler 100-one, 2-7 portions of stabilizer, 0.5-1.2 portions of stearic acid, 2-3.5 portions of ACR modifier and 15-25 portions of flame retardant and smoke suppressant.
2. The method for preparing the flame-retardant sheet material for space renting according to claim 1, wherein the temperature of the heating contact is 240-280 ℃.
3. The preparation method of the flame-retardant sheet material for space renting according to claim 1 or 2, wherein the heating and contacting conditions comprise: having R as shown in formula (I)1And R2The substituted phosphinate, tributyltin and tri-n-octylphosphine oxide are mixed for 20-30min at the temperature of 240-280 ℃, and then are subjected to heat preservation for 1.5-2.5h at the temperature of 260-280 ℃.
4. The method for preparing the flame retardant sheet material for space renting according to claim 1 or 2, wherein the alkyl is unsubstituted or substituted by one or more of halogen, hydroxyl and amino; and/or the presence of a gas in the gas,
the phenyl is unsubstituted or substituted by one or more of halogen, hydroxyl and amino.
5. The method for preparing a flame retardant panel for space renting of claim 1, wherein the polyvinyl chloride is PVC-SG5 type; and/or;
the filler is one or more of heavy calcium carbonate, nano calcium carbonate, perlite, titanium dioxide and light calcium carbonate; and/or the presence of a gas in the gas,
the stabilizer is a lead salt composite stabilizer, an organic tin stabilizer, a calcium-zinc composite stabilizer or a potassium-zinc composite stabilizer.
6. A flame-retardant sheet for space renting prepared by the preparation method according to any one of claims 1-5.
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