CN111518323A - DOP-free rubber and plastic product and preparation method thereof - Google Patents
DOP-free rubber and plastic product and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of rubber and plastic products, and provides a DOP-free rubber and plastic product which comprises, by mass, 15-20 parts of nitrile rubber, 5-7 parts of polyvinyl chloride resin, 3-5 parts of ethylene-vinyl acetate copolymer, 20-30 parts of talcum powder, 13-15 parts of chlorinated paraffin oil, 1-2 parts of epoxy soybean oil, 2-4 parts of protective wax, 3-5 parts of white carbon black, 0.2-0.3 part of an active agent, 0.1-0.3 part of stearic acid, 10-20 parts of a flame retardant, 0.1-0.3 part of an anti-aging agent, 1-3 parts of an accelerator, 0.1-0.3 part of a vulcanizing agent, 0.5-1 part of ethylenediamine di-o-phenyl sodium acetate, 0.8-1.2 part of sodium dipentyl sulfosuccinate, 1-2 parts of di-n-butylamine and 1-1.5 parts of cyclopentylamine. Through the technical scheme, the problem of poor comprehensive performance of the rubber without DOP in the prior art is solved.
Description
Technical Field
The invention belongs to the technical field of rubber and plastic products, and relates to a DOP-free rubber and plastic product and a preparation method thereof.
Background
At present, the rubber and plastic products are generally prepared by taking nitrile rubber and polyvinyl chloride resin as main materials, taking chlorinated paraffin oil and DOP as plasticizers, adding other auxiliary materials, and vulcanizing and foaming. Dioctyl Phthalate (Dioctyl Phthalate), abbreviated as Dioctyl (DOP), is an organic ester compound, is a common plasticizer, can be widely used in all products using plasticizers, such as PVC cable materials, leather, synthetic leather, transparent materials, soft and hard pipes, edge banding, acrylic plates, rubber, polyurethane, foam sandals, soft plates, coatings, glue, adhesives, decorative materials and the like, but the DOP is not environment-friendly and harmful to human bodies, many countries have already prohibited to use the product as a main plasticizer, and other environment-friendly and nontoxic plasticizers cannot achieve the plasticizing effect of the DOP, and the comprehensive performance of the prepared rubber and plastic product cannot meet the requirements of people, so the research on the green and environment-friendly DOP substituting plasticizer is a problem which needs to be solved by people at present.
Disclosure of Invention
The invention provides a DOP-free rubber and plastic product and a preparation method thereof, which solve the problem of poor comprehensive performance of DOP-free rubber in the prior art.
The technical scheme of the invention is realized as follows: the DOP-free rubber and plastic product comprises, by mass, 15-20 parts of nitrile rubber, 5-7 parts of polyvinyl chloride resin, 3-5 parts of ethylene-vinyl acetate copolymer, 20-30 parts of talcum powder, 13-15 parts of chlorinated paraffin oil, 1-2 parts of epoxy soybean oil, 2-4 parts of protective wax, 3-5 parts of white carbon black, 0.2-0.3 part of an active agent, 0.1-0.3 part of stearic acid, 10-20 parts of a flame retardant, 0.1-0.3 part of an anti-aging agent, 1-3 parts of an accelerator, 0.1-0.3 part of a vulcanizing agent, 0.5-1 part of ethylenediamine-o-phenyl sodium acetate, 0.8-1.2 parts of dipentyl sulfosuccinate sodium, 1-2 parts of di-n-butylamine and 1-1.5 parts of cyclopentylamine.
The environment-friendly flame retardant coating further comprises, by mass, 15-18 parts of nitrile rubber, 6-7 parts of polyvinyl chloride resin, 3-4 parts of vinyl acetate copolymer, 25-30 parts of talcum powder, 13-14 parts of chlorinated paraffin oil, 1-2 parts of epoxy soybean oil, 2-3.5 parts of protective wax, 3-5 parts of white carbon black, 0.2-0.3 part of an active agent, 0.1-0.3 part of stearic acid, 10-18 parts of a flame retardant, 0.1-0.25 part of an anti-aging agent, 1-2 parts of a promoter, 0.1-0.25 part of a vulcanizing agent, 0.5-0.8 part of ethylenediamine di-o-phenyl sodium acetate, 0.8-1 part of sodium dipentyl sulfosuccinate, 1-2 parts of di-n-butylamine and 1-1.5 parts of cyclopentylamine.
Further, the flame retardant is selected from one or more of zinc borate, antimony trioxide and aluminum hydroxide.
Further, the active agent is magnesium oxide, calcium oxide or zinc stearate.
Further, the protective wax is selected from one or more of paraffin wax, mixed crystal wax and polyethylene wax.
Further, the vulcanizing agent is sulfur, and the accelerator is N-cyclohexyl-2-benzothiazole sulfonamide.
Further, the content of vinyl acetate in the ethylene-vinyl acetate copolymer is 15-35%, the average polymerization degree of the polyvinyl chloride resin is 600-2000, the average molecular weight is 5-8 ten thousand, and the content of acrylonitrile in the nitrile rubber is 20-30%.
Further, the anti-aging agent is selected from one or more of N-phenyl-2-naphthylamine, 4' -dioctyl diphenylamine, 2-mercaptobenzimidazole and 6-dodecyl-2, 2, 4-trimethyl-1, 2-dihydroquinoline.
The preparation method of the DOP-free rubber and plastic product comprises the following steps:
A. preparing raw materials according to 15-20 parts of nitrile rubber, 5-7 parts of polyvinyl chloride resin, 3-5 parts of ethylene-vinyl acetate copolymer, 20-30 parts of talcum powder, 13-15 parts of chlorinated paraffin oil, 1-2 parts of epoxy soybean oil, 2-4 parts of protective wax, 3-5 parts of white carbon black, 0.2-0.3 part of active agent, 0.1-0.3 part of stearic acid, 10-20 parts of flame retardant, 0.1-0.3 part of anti-aging agent, 1-3 parts of accelerator, 0.1-0.3 part of vulcanizing agent, 0.5-1 part of ethylenediamine di-o-phenyl sodium acetate, 0.8-1.2 parts of dipentyl sulfosuccinate sodium, 1-2 parts of di-n-butylamine and 1-1.5 parts of cyclopentylamine;
B. the preparation method comprises the following steps of blending nitrile rubber, a foaming agent, a flame retardant, talcum powder, white carbon black, chlorinated paraffin oil, epoxy soybean oil, an ethylene-vinyl acetate copolymer, an anti-aging agent, protective wax, an active agent and stearic acid, discharging materials when the temperature reaches 160-170 ℃ to obtain a blended material, reducing the temperature of the blended material to 75-85 ℃, re-refining, cooling and storing for 24-26 hours to obtain a rubber sheet;
C. adding a vulcanizing agent and an accelerant into the rubber sheet, uniformly mixing, and then discharging to obtain rubber strips;
D. and extruding the rubber strip for molding, vulcanizing and foaming, and cooling to obtain the DOP-free rubber and plastic product.
Further, in the step D, the sulfuration foaming is sequentially carried out at 8 stages of increasing temperatures, wherein the 8 stages of increasing temperatures are 120 ℃, 125 ℃, 130 ℃, 135 ℃, 140 ℃, 150 ℃, 165 ℃ and 175 ℃.
The working principle and the beneficial effects of the invention are as follows:
1. according to the invention, through the optimized design of the formula and the preparation method of the rubber and plastic product, the prepared rubber and plastic product has no damage at the temperature of minus 40 ℃, the tensile strength reaches 25.3Mpa, the elongation at break reaches 586%, the oxygen index is 44%, and the solvent extraction rate is only 2.5%. Therefore, the rubber and plastic product has good low temperature resistance, mechanical property and flame retardance, does not have the problems of oil bleeding and solvent molecule migration out of the surface, and is suitable for popularization and use.
2. The rubber and plastic product adopts di-n-butylamine and cyclopentylamine, so that the mechanical property of the rubber and plastic product is improved, the compatibility of epoxy soybean oil is improved, and the solvent extraction rate is reduced. During the vulcanization process, di-n-butylamine and cyclopentylamine are decomposed to release hydrogen protons, the hydrogen protons attack epoxy groups of the epoxidized soybean oil, the epoxy groups are subjected to ring opening to become active centers and are crosslinked with rubber molecules, so that the epoxidized soybean oil is more difficult to move in the rubber, the epoxidized soybean oil cannot migrate out of the rubber surface to form an oil bleeding phenomenon, and meanwhile, the epoxidized soybean oil is wound with a rubber matrix molecular chain, so that the mechanical property of the rubber is improved.
3. In the rubber and plastic product, the ethylenediamine-dipolyphenyl sodium acetate, the sodium dipentyl sulfosuccinate and other components are compounded, so that the mechanical property of the rubber and plastic product and the compatibility of epoxy soybean oil are improved. The reason is that the surface of the white carbon black has silicon hydroxyl, so that the white carbon black has stronger hydrogen bond function, and simultaneously has great difference with rubber macromolecules in chemical structure and physical form, so that the white carbon black is difficult to be well dispersed in a rubber matrix, one end of the added ethylenediamine di-o-phenyl sodium acetate and the added sodium dipentyl sulfosuccinate is long-chain alkyl, and the other end of the added ethylenediamine di-o-phenyl sodium acetate and the added sodium dipentyl sulfosuccinate is carboxyl, namely has certain compatibility with the rubber macromolecules, and is combined with the hydroxyl on the surface of the white carbon black, so that the polarity of the white carbon black is reduced, the compatibility of the white carbon black and the rubber matrix is improved, the white carbon black. In addition, the ethylene diamine dipolyphenyl sodium acetate and the sodium dipentyl sulfosuccinate are compounded, can be combined with a hydroxyl bond formed after an epoxy group of the epoxy soybean oil is subjected to ring opening, participate in a crosslinking reaction of the epoxy soybean oil and a rubber matrix, and improve the crosslinking strength, so that the compatibility of the epoxy soybean oil and a rubber and plastic product is further improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The content of vinyl acetate in the ethylene-vinyl acetate copolymer is 15-35%, the average polymerization degree of the polyvinyl chloride resin is 600-2000-one-year-old, the average molecular weight is 5-8-ten-thousand, and the content of acrylonitrile in the nitrile rubber is 20-30%.
Example 1
A DOP-free rubber and plastic product comprises, by mass, 15 parts of nitrile rubber, 7 parts of polyvinyl chloride resin, 3 parts of ethylene-vinyl acetate copolymer, 30 parts of talcum powder, 13 parts of chlorinated paraffin oil, 2 parts of epoxy soybean oil, 2 parts of protective wax, 5 parts of white carbon black, 0.2 part of an active agent, 0.3 part of stearic acid, 10 parts of a flame retardant, 0.3 part of an anti-aging agent, 1 part of an accelerator, 0.3 part of sulfur, 0.5 part of ethylenediamine di-o-phenyl sodium acetate, 1.2 parts of dipentyl sulfosuccinate sodium, 1 part of di-n-butylamine and 1.5 parts of cyclopentylamine.
The accelerant is N-cyclohexyl-2-benzothiazole sulfonamide; the flame retardant is antimony trioxide; the active agent is magnesium oxide; the protective wax is paraffin; the anti-aging agent is N-phenyl-2-naphthylamine.
The preparation method of the DOP-free rubber and plastic product comprises the following steps:
A. preparing raw materials according to the mass parts;
B. putting nitrile rubber, a foaming agent, a flame retardant, talcum powder, white carbon black, chlorinated paraffin oil, epoxy soybean oil, an ethylene-vinyl acetate copolymer, an anti-aging agent, protective wax, an active agent and stearic acid into an internal mixer for blending, discharging when the temperature reaches 160 ℃ to obtain a blended material, reducing the temperature of the blended material to 85 ℃, remixing, cooling and storing for 24 hours to obtain a rubber sheet;
C. adding a vulcanizing agent and an accelerant into the rubber sheet, uniformly mixing, and then discharging to obtain rubber strips;
D. the adhesive tape is extruded and molded by an extruder and sent into an oven for vulcanization foaming, and the temperature of the oven is 8 sections of increasing temperature: cooling at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 150 deg.C, 165 deg.C, 175 deg.C to obtain the DOP-free rubber-plastic product.
Example 2
A DOP-free rubber and plastic product comprises, by mass, 17 parts of nitrile rubber, 6.5 parts of polyvinyl chloride resin, 3.5 parts of vinyl acetate copolymer, 28 parts of talcum powder, 13.5 parts of chlorinated paraffin oil, 1.5 parts of epoxy soybean oil, 3 parts of protective wax, 4 parts of white carbon black, 0.25 part of an active agent, 0.2 part of stearic acid, 15 parts of a flame retardant, 0.2 part of an anti-aging agent, 1.5 parts of an accelerator, 0.2 part of a vulcanizing agent, 0.6 part of ethylenediamine-di-o-phenyl sodium acetate, 0.9 part of dipentyl sulfosuccinate sodium, 1.5 parts of di-n-butylamine and 1.2 parts of cyclopentylamine.
The accelerant is N-cyclohexyl-2-benzothiazole sulfonamide; the flame retardant is antimony trioxide and aluminum hydroxide with the mass ratio of 1: 1; the active agent is magnesium oxide and calcium oxide with the mass ratio of 2: 1; the protective wax is polyethylene wax; the anti-aging agent is 6-dodecyl-2, 2, 4-trimethyl-1, 2-dihydroquinoline.
The preparation method of the DOP-free rubber and plastic product comprises the following steps:
A. preparing raw materials according to the mass parts;
B. putting nitrile rubber, a foaming agent, a flame retardant, talcum powder, white carbon black, chlorinated paraffin oil, epoxy soybean oil, an ethylene-vinyl acetate copolymer, an anti-aging agent, protective wax, an active agent and stearic acid into an internal mixer for blending, discharging when the temperature reaches 165 ℃ to obtain a blended material, reducing the temperature of the blended material to 80 ℃, re-refining, cooling and storing for 24-26h to obtain a rubber sheet;
C. adding a vulcanizing agent and an accelerant into the rubber sheet, uniformly mixing, and then discharging to obtain rubber strips;
D. the adhesive tape is extruded and molded by an extruder and sent into an oven for vulcanization foaming, and the temperature of the oven is 8 sections of increasing temperature: cooling at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 150 deg.C, 165 deg.C, 175 deg.C to obtain the DOP-free rubber-plastic product.
Example 3
A DOP-free rubber and plastic product comprises, by mass, 20 parts of nitrile rubber, 5 parts of polyvinyl chloride resin, 5 parts of ethylene-vinyl acetate copolymer, 20 parts of talcum powder, 15 parts of chlorinated paraffin oil, 1 part of epoxy soybean oil, 4 parts of protective wax, 3 parts of white carbon black, 0.3 part of an active agent, 0.1 part of stearic acid, 20 parts of a flame retardant, 0.1 part of an anti-aging agent, 3 parts of an accelerator, 0.1 part of sulfur, 1 part of ethylenediamine di-o-phenyl sodium acetate, 0.8 part of sodium dipentyl sulfosuccinate, 2 parts of di-n-butylamine and 1 part of cyclopentylamine.
The accelerant is N-cyclohexyl-2-benzothiazole sulfonamide; the flame retardant is selected from aluminum hydroxide; the active agent is zinc stearate; the protective wax is mixed crystal wax; the anti-aging agent is 4,4' -dioctyl diphenylamine.
The preparation method of the DOP-free rubber and plastic product comprises the following steps:
A. preparing raw materials according to the mass parts;
B. putting nitrile rubber, a foaming agent, a flame retardant, talcum powder, white carbon black, chlorinated paraffin oil, epoxy soybean oil, an ethylene-vinyl acetate copolymer, an anti-aging agent, protective wax, an active agent and stearic acid into an internal mixer for blending, discharging when the temperature reaches 170 ℃ to obtain a blended material, reducing the temperature of the blended material to 75 ℃, re-refining, cooling and storing for 26 hours to obtain a rubber sheet;
C. adding a vulcanizing agent and an accelerant into the rubber sheet, uniformly mixing, and then discharging to obtain rubber strips;
D. the adhesive tape is extruded and molded by an extruder and sent into an oven for vulcanization foaming, and the temperature of the oven is 8 sections of increasing temperature: cooling at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 150 deg.C, 165 deg.C, 175 deg.C to obtain the DOP-free rubber-plastic product.
Example 4
A DOP-free rubber and plastic product comprises, by mass, 18 parts of nitrile rubber, 7 parts of polyvinyl chloride resin, 4 parts of ethylene-vinyl acetate copolymer, 25 parts of talcum powder, 13 parts of chlorinated paraffin oil, 2 parts of epoxy soybean oil, 4 parts of protective wax, 3 parts of white carbon black, 0.3 part of an active agent, 0.2 part of stearic acid, 15 parts of a flame retardant, 0.1 part of an anti-aging agent, 1 part of an accelerator, 0.3 part of sulfur, 0.5 part of ethylenediamine di-o-phenyl sodium acetate, 0.8 part of dipentyl sulfosuccinate sodium, 1.8 parts of di-n-butylamine and 1.4 parts of cyclopentylamine.
The accelerant is N-cyclohexyl-2-benzothiazole sulfonamide; the flame retardant is selected from zinc borate and antimony trioxide with the mass ratio of 1: 1; the active agent is zinc stearate; the protective wax is mixed crystal wax; the anti-aging agent is N-phenyl-2-naphthylamine and 2-mercaptobenzimidazole in a mass ratio of 1: 1.
The preparation method of the DOP-free rubber and plastic product comprises the following steps:
A. preparing raw materials according to the mass parts;
B. putting nitrile rubber, a foaming agent, a flame retardant, talcum powder, white carbon black, chlorinated paraffin oil, epoxy soybean oil, an ethylene-vinyl acetate copolymer, an anti-aging agent, protective wax, an active agent and stearic acid into an internal mixer for blending, discharging when the temperature reaches 165 ℃ to obtain a blended material, reducing the temperature of the blended material to 80 ℃, re-refining, cooling and storing for 24 hours to obtain a rubber sheet;
C. adding a vulcanizing agent and an accelerant into the rubber sheet, uniformly mixing, and then discharging to obtain rubber strips;
D. the adhesive tape is extruded and molded by an extruder and sent into an oven for vulcanization foaming, and the temperature of the oven is 8 sections of increasing temperature: cooling at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 150 deg.C, 165 deg.C, 175 deg.C to obtain the DOP-free rubber-plastic product.
Example 5
A DOP-free rubber and plastic product comprises, by mass, 20 parts of nitrile rubber, 5 parts of polyvinyl chloride resin, 3 parts of ethylene-vinyl acetate copolymer, 20 parts of talcum powder, 15 parts of chlorinated paraffin oil, 1 part of epoxy soybean oil, 2 parts of protective wax, 3 parts of white carbon black, 0.2 part of an active agent, 0.1 part of stearic acid, 10 parts of a flame retardant, 0.1 part of an anti-aging agent, 1 part of an accelerator, 0.1 part of sulfur, 0.5 part of ethylenediamine di-o-phenyl sodium acetate, 0.8 part of dipentyl sulfosuccinate sodium, 1 part of di-n-butylamine and 1.5 parts of cyclopentylamine.
The accelerant is N-cyclohexyl-2-benzothiazole sulfonamide; the flame retardant is selected from antimony trioxide; the active agent is calcium oxide; the protective wax is paraffin; the anti-aging agent is 4,4' -dioctyl diphenylamine.
The preparation method of the DOP-free rubber and plastic product comprises the following steps:
A. preparing raw materials according to the mass parts;
B. putting nitrile rubber, a foaming agent, a flame retardant, talcum powder, white carbon black, chlorinated paraffin oil, epoxy soybean oil, an ethylene-vinyl acetate copolymer, an anti-aging agent, protective wax, an active agent and stearic acid into an internal mixer for blending, discharging when the temperature reaches 160 ℃ to obtain a blended material, reducing the temperature of the blended material to 85 ℃, remixing, cooling and storing for 24 hours to obtain a rubber sheet;
C. adding a vulcanizing agent and an accelerant into the rubber sheet, uniformly mixing, and then discharging to obtain rubber strips;
D. the adhesive tape is extruded and molded by an extruder and sent into an oven for vulcanization foaming, and the temperature of the oven is 8 sections of increasing temperature: cooling at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 150 deg.C, 165 deg.C, 175 deg.C to obtain the DOP-free rubber-plastic product.
Comparative example 1
The difference compared to example 2 is that di-n-butylamine is not included in the composition of the rubber-plastic product.
Comparative example 2
Compared with example 2, the difference is that the composition of the rubber-plastic product does not include cyclopentylamine.
Comparative example 3
Compared with the example 2, the difference is that the rubber and plastic product does not comprise di-n-butylamine and cyclopentylamine.
Comparative example 4
Compared with example 2, the difference is that the rubber-plastic product does not contain the sodium ethylenediamine-diphenylphthalate.
Comparative example 5
The difference compared to example 2 is that sodium dipentyl sulfosuccinate is not included in the composition of the rubber plastic product.
Comparative example 6
Compared with example 2, the difference is that the rubber and plastic product does not comprise the sodium ethylenediamine-diphenylphthalate and the sodium dipentyl sulfosuccinate.
Application test
The rubber and plastic products obtained in examples 1 to 5 and comparative examples 1 to 6 were tested as follows:
1. low-temperature brittleness: testing the low-temperature brittleness of the sample according to a testing method specified in GB/T1682-1994 single sample method for testing the low-temperature brittleness of vulcanized rubber;
2. tensile strength: testing the tensile strength of the sample according to a testing method specified in GB/T528-2009 determination of tensile stress strain performance of vulcanized rubber or thermoplastic rubber;
3. flame retardancy: part 2 of the combustion behaviour was determined according to GB/T2406.2-2009 "oxygen index for plastics: test samples for flame retardancy according to the method specified in Room temperature test;
4. according to GB-T3516 & 2006 determination of rubber solvent extract, extracting a sample in a Soxhlet extractor for 24 hours by using isopropanol as a solvent, drying the extracted sample in a vacuum oven at 50 ℃ to constant weight, and calculating the solvent extraction rate of the sample;
5. the compatibility of the epoxy soybean oil in the samples was observed according to ASTM D2383-97 "procedure for determination of compatibility of PVC plasticizers under humid conditions".
The test results are shown in table 1 below.
TABLE 1 rubber-plastic products Performance test results
As can be seen from the above Table 1, the rubber-plastic products prepared in examples 1-5 have no damage at-40 ℃, the tensile strength is as high as 25.3MPa, the elongation at break is 586%, the oxygen index is 44%, the solvent extraction rate is only 2.5%, and in the determination of compatibility of epoxy soybean oil, the surface of the sample is dry and no oil precipitation phenomenon occurs. Therefore, the rubber and plastic product has good low temperature resistance, mechanical property and flame retardance, does not have the problems of oil bleeding and solvent molecule migration out of the surface, and is suitable for popularization and use.
Compared with the rubber product of the embodiment 2, the rubber product of the comparative examples 1-3 has obviously reduced mechanical property and epoxy soybean oil compatibility, the rubber product of the embodiment 2 adopts di-n-butylamine and cyclopentylamine to be compounded with other components, the tensile strength is up to 25.3Mpa, the elongation at break is up to 586%, the solvent extraction rate is only 2.5%, and in the determination of epoxy soybean oil compatibility, the surface of a sample is dry and no oil precipitation and oil bleeding phenomenon occurs. The rubber and plastic product of the invention adopts the di-n-butylamine and the cyclopentylamine, so that the mechanical property of the rubber and plastic product is improved, the compatibility of epoxy soybean oil is improved, and the solvent extraction rate is reduced. During the vulcanization process, di-n-butylamine and cyclopentylamine are decomposed to release hydrogen protons, the hydrogen protons attack epoxy groups of the epoxidized soybean oil, the epoxy groups are subjected to ring opening to become active centers and are crosslinked with rubber molecules, so that the epoxidized soybean oil is more difficult to move in the rubber, the epoxidized soybean oil cannot migrate out of the rubber surface to form an oil bleeding phenomenon, and meanwhile, the epoxidized soybean oil is wound with a rubber matrix molecular chain, so that the mechanical property of the rubber is improved.
It can be seen from comparative examples 4, 5 and 6 of the present invention that the rubber and plastic product is prepared by compounding ethylenediamine sodium dipentyl acetate or sodium dipentyl sulfosuccinate with other components alone or without the ethylenediamine sodium dipentyl acetate or sodium dipentyl sulfosuccinate with other components, and the mechanical properties and the compatibility with epoxy soybean oil of the obtained rubber and plastic product are also poor, and it can be seen that the rubber and plastic product of example 2 of the present invention is prepared by compounding ethylenediamine sodium dipentyl acetate, sodium dipentyl sulfosuccinate with other components, and the mechanical properties and the compatibility with epoxy soybean oil of the rubber and plastic product are improved. The reason is that the surface of the white carbon black has silicon hydroxyl, so that the white carbon black has stronger hydrogen bond function, and simultaneously has great difference with rubber macromolecules in chemical structure and physical form, so that the white carbon black is difficult to be well dispersed in a rubber matrix, one end of the added ethylenediamine di-o-phenyl sodium acetate and the added sodium dipentyl sulfosuccinate is long-chain alkyl, and the other end of the added ethylenediamine di-o-phenyl sodium acetate and the added sodium dipentyl sulfosuccinate is carboxyl, namely has certain compatibility with the rubber macromolecules, and is combined with the hydroxyl on the surface of the white carbon black, so that the polarity of the white carbon black is reduced, the compatibility of the white carbon black and the rubber matrix is improved, the white carbon black. In addition, the ethylene diamine dipolyphenyl sodium acetate and the sodium dipentyl sulfosuccinate are compounded, can be combined with a hydroxyl bond formed after an epoxy group of the epoxy soybean oil is subjected to ring opening, participate in a crosslinking reaction of the epoxy soybean oil and a rubber matrix, and improve the crosslinking strength, so that the compatibility of the epoxy soybean oil and a rubber and plastic product is further improved.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The DOP-free rubber and plastic product is characterized by comprising, by mass, 15-20 parts of nitrile rubber, 5-7 parts of polyvinyl chloride resin, 3-5 parts of ethylene-vinyl acetate copolymer, 20-30 parts of talcum powder, 13-15 parts of chlorinated paraffin oil, 1-2 parts of epoxy soybean oil, 2-4 parts of protective wax, 3-5 parts of white carbon black, 0.2-0.3 part of active agent, 0.1-0.3 part of stearic acid, 10-20 parts of flame retardant, 0.1-0.3 part of anti-aging agent, 1-3 parts of accelerator, 0.1-0.3 part of vulcanizing agent, 0.5-1 part of ethylenediamine di-o-phenyl sodium acetate, 0.8-1.2 parts of sodium dipentyl sulfosuccinate, 1-2 parts of di-n-butylamine and 1-1.5 parts of cyclopentylamine.
2. The DOP-free rubber and plastic product according to claim 1, comprising 15-18 parts of nitrile rubber, 6-7 parts of polyvinyl chloride resin, 3-4 parts of vinyl acetate copolymer, 25-30 parts of talcum powder, 13-14 parts of chlorinated paraffin oil, 1-2 parts of epoxy soybean oil, 2-3.5 parts of protective wax, 3-5 parts of white carbon black, 0.2-0.3 part of active agent, 0.1-0.3 part of stearic acid, 10-18 parts of flame retardant, 0.1-0.25 part of anti-aging agent, 1-2 parts of accelerator, 0.1-0.25 part of vulcanizing agent, 0.5-0.8 part of ethylenediamine sodium diphophthalate, 0.8-1 part of sodium sulfosuccinate, 1-2 parts of di-n-butylamine and 1-1.5 parts of cyclopentylamine.
3. The DOP-free rubber-plastic product according to claim 1, wherein the flame retardant is selected from one or more of zinc borate, antimony trioxide and aluminum hydroxide.
4. The DOP-free rubber plastic product as claimed in claim 1, wherein the active agent is magnesium oxide, calcium oxide or zinc stearate.
5. The DOP-free rubber-plastic product according to claim 1, wherein the protective wax is one or more selected from paraffin wax, mixed crystal wax and polyethylene wax.
6. The DOP-free rubber-plastic product according to claim 1, wherein the vulcanizing agent is sulfur and the accelerator is N-cyclohexyl-2-benzothiazolesulfenamide.
7. The DOP-free rubber and plastic product as claimed in claim 1, wherein the ethylene-vinyl acetate copolymer contains vinyl acetate 15-35%, the polyvinyl chloride resin has an average degree of polymerization of 600-2000 and an average molecular weight of 5-8 ten thousand, and the acrylonitrile-butadiene rubber contains acrylonitrile 20-30%.
8. The DOP-free rubber and plastic product as claimed in claim 1, wherein the antioxidant is selected from one or more of N-phenyl-2-naphthylamine, 4' -dioctyldiphenylamine, 2-mercaptobenzimidazole, and 6-dodecyl-2, 2, 4-trimethyl-1, 2-dihydroquinoline.
9. The preparation method of the DOP-free rubber and plastic product is characterized by comprising the following steps of:
A. preparing raw materials according to the mass portion of claim 1;
B. the preparation method comprises the following steps of blending nitrile rubber, a foaming agent, a flame retardant, talcum powder, white carbon black, chlorinated paraffin oil, epoxy soybean oil, an ethylene-vinyl acetate copolymer, an anti-aging agent, protective wax, an active agent and stearic acid, discharging materials when the temperature reaches 160-170 ℃ to obtain a blended material, reducing the temperature of the blended material to 75-85 ℃, re-refining, cooling and storing for 24-26 hours to obtain a rubber sheet;
C. adding a vulcanizing agent and an accelerant into the rubber sheet, uniformly mixing, and then discharging to obtain rubber strips;
D. and extruding the rubber strip for molding, vulcanizing and foaming, and cooling to obtain the DOP-free rubber and plastic product.
10. The method according to claim 9, wherein the vulcanization foaming in step D is performed at 8 stages of increasing temperatures, wherein the 8 stages of increasing temperatures are 120 ℃, 125 ℃, 130 ℃, 135 ℃, 140 ℃, 150 ℃, 165 ℃, 175 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114434923A (en) * | 2022-03-10 | 2022-05-06 | 神州节能科技集团有限公司 | Environment-friendly flame-retardant rubber-plastic composite shed quilt |
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