CN112457666A - Special material for transparent nylon tube and preparation method thereof - Google Patents
Special material for transparent nylon tube and preparation method thereof Download PDFInfo
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- CN112457666A CN112457666A CN202011326368.9A CN202011326368A CN112457666A CN 112457666 A CN112457666 A CN 112457666A CN 202011326368 A CN202011326368 A CN 202011326368A CN 112457666 A CN112457666 A CN 112457666A
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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Abstract
The invention relates to a special material for a transparent nylon tube and a preparation method thereof, wherein the special material for the transparent nylon tube is prepared from high-viscosity nylon 1012, a high-viscosity nylon elastomer, a plasticizer and an auxiliary agent according to the weight ratio (80-90): (5-10): (5-10): (1-2), the high-viscosity nylon 1012 is prepared from decamethylenediamine, dodecanedioic acid and sebacic acid, the high-viscosity nylon elastomer is prepared from a nylon 1012 monomer, polytetramethylene glycol and dimer acid, the plasticizer is N-ethyl o-p-toluenesulfonamide, the auxiliary agent is an antioxidant, a light stabilizer, a copper resisting agent and a lubricant, and the transparent nylon tube special material is prepared by blending and extruding double screws at a proper screw combination and temperature.
Description
Technical Field
The invention relates to a special material for a transparent nylon tube and a preparation method thereof, belonging to the technical field of high polymer materials.
Background
The nylon tube has the advantages of smooth surface, reduced resistance, rust prevention, scale deposition prevention, convenient processing and installation and the like, and is widely applied to various industries such as air, water and chemical substance lubrication, instrument lines, irrigation control systems, fuel conveying pipes of textile factories, food factories, vehicles and ships, vacuum systems, air conditioning systems, oscillating insulators, electrostatic insulators and the like. The poly omega-aminoundecanoyl of the nylon 11 tube material in the prior art has the advantages of low water absorption, good oil resistance, low temperature resistance, easy processing and the like, the characteristics of the poly dodecalactam of the nylon 12 tube material in the prior art are similar to those of PA11, but the poly dodecalactam has different crystal structures, is a good electrical insulator, does not influence the insulating property due to moisture as other polyamides, has certain impact resistance and chemical stability, and still has the problems of high cost, poor bending deformation resistance within an elastic limit and poor transparency.
The nylon 1012 pipe material in the prior art has low water absorption rate in nylon, is oil-resistant, alkali-resistant and nontoxic, but has the defects of large influence by temperature, poor wear resistance and flexibility, complex modification addition component, stable size, insufficient extrusion processability and poor modification effect, is limited by foreign technologies and raw materials, and is difficult to meet the production and application requirements of automobile brake pipes, oil conveying pipes and the like and transparent nylon pipes requiring low temperature resistance and high toughness in the prior art.
Disclosure of Invention
The invention aims to provide a special material for a transparent nylon pipe and a preparation method thereof aiming at the defects of the prior art, the special material for the transparent nylon pipe, which is prepared from high-viscosity nylon 1012, a high-viscosity nylon elastomer, a plasticizer and an auxiliary agent, has the advantages of high toughness, excellent low temperature property, good wear resistance, low water absorption, stable size, good extrusion processability, obvious cost reduction, and capability of overcoming the defects of dependence on external raw materials and technologies, and can be applied to the preparation of automobile brake pipes, oil pipelines, transparent pipes with the requirements of low temperature resistance, high toughness and the like.
The invention is realized by the following technical scheme:
the special material for the transparent nylon tube comprises the following components in percentage by weight:
the high-viscosity nylon 1012 is prepared from decamethylene diamine, dodecanedioic acid and sebacic acid, and the high-viscosity nylon elastomer is prepared from a nylon 1012 monomer, polybutylene glycol and dimer acid.
The material special for the transparent nylon tube is characterized in that the high-viscosity nylon 1012, the high-viscosity elastomer, the plasticizer and the auxiliary agent are 85: 8.5: 5: 1.5;
the weight ratio of the decamethylene diamine to the dodecanedioic acid to the sebacic acid is 2.5: 3:1, the melt index of the high-viscosity nylon 1012 is 4-6g/10 min; the nylon 1012 monomer is prepared from decamethylene diamine and dodecanedioic acid according to the mass ratio of 25:33, and the nylon 1012 monomer, the PTMG and the dimer acid are calculated according to the mass ratio of 85: 10: 5, the melt index of the high-viscosity nylon elastomer is less than or equal to 10g/10 min;
the plasticizer is N-ethyl o-p-toluenesulfonamide, the auxiliary agent is one or a mixture of an antioxidant, a light stabilizer, a copper inhibitor and a lubricant, the antioxidant is antioxidant 1098 or antioxidant 168, the light stabilizer is light stabilizer UV-622, the copper inhibitor is copper inhibitor 1024, and the lubricant is silicone powder.
A preparation method of a special material for nylon pipes comprises the following steps:
(1) preparation of high viscosity nylon 1012: adding decamethylenediamine, dodecanedioic acid, sebacic acid and distilled water into a kettle, heating and boosting pressure to discharge water vapor, reacting for 2-3h, then reducing to normal pressure, pressurizing and extruding, cooling, granulating, drying and packaging to obtain transparent copolymerized nylon 1012; adding the copolymerized nylon 1012 into a conical vacuum rotary dryer, heating and reacting for 6-8h under negative pressure to obtain high-viscosity nylon 1012;
(2) preparing a high-viscosity nylon elastomer: adding decamethylenediamine, dodecanedioic acid and alcohol into a neutralization kettle, heating, discharging water vapor under normal pressure to maintain the pressure, reacting for 1-2h, filtering, cooling, and centrifuging to obtain a filter cake to obtain a nylon 1012 monomer;
feeding a nylon 1012 monomer, polybutylene glycol and dimer acid into a polymerization kettle, heating and boosting, discharging water vapor, reacting for 2-3h, then reducing the pressure to normal pressure, pressurizing and extruding, cooling, granulating or granulating, drying and packaging to obtain a transparent nylon elastomer; adding the nylon elastomer into a conical vacuum rotary dryer, heating and reacting for 6-8h under negative pressure to obtain the high-viscosity nylon elastomer;
(3) preparing a finished product: high-viscosity nylon 1012 and high-viscosity nylon elastomer are conveyed into respective storage bins through pipelines under negative pressure, plasticizer and assistant are respectively added into corresponding auxiliary bins and assistant bins, and the weight ratio of the high-viscosity nylon 1012, the high-viscosity nylon elastomer, the plasticizer and the assistant is as follows: (80-90): (5-10): (5-10): and (1-2) putting the mixture into a double-screw extruder, extruding, cooling, granulating, drying and packaging to obtain the final special material for the transparent nylon tube finished product.
The preparation method of the special material for the nylon tube comprises the following steps of (1) preparing the copolymerized nylon 1012, wherein the mass ratio of the decamethylene diamine to the dodecanedioic acid to the sebacic acid is 2.5: 3:1, wherein the temperature is 240 ℃ and the pressure is 1.5MPa when the temperature and the pressure are increased, and the temperature is controlled at 240 ℃ and 250 ℃ after the pressure is reduced to the normal pressure; when preparing the high-viscosity nylon 1012, the temperature is raised to 160-165 ℃, the negative pressure is minus 0.098MPa, and the melt index is detected and controlled to be 4-6g/10min after the reaction.
The preparation method of the special material for the nylon tube comprises the following steps of (2) preparing the nylon 1012 monomer by using decamethylenediamine and dodecanedioic acid in a mass ratio of 25:33, and heating to 110-; when the nylon elastomer is prepared, the mass ratio of the nylon 1012 monomer to the polybutylene glycol to the dimer acid is 85: 10: 5, adding a heat stabilizer and a catalyst into the polymerization kettle, heating to 240 ℃, boosting to 1.5MPa, and controlling the temperature to be 250 ℃ after reducing to normal pressure; when preparing the high-viscosity nylon elastomer, the temperature is raised to 160-165 ℃, the negative pressure is-0.098 MPa, and the melt index is detected and controlled to be less than or equal to 10g/10min after the reaction.
The preparation method of the special material for the nylon pipe comprises the following steps of (3) enabling the weight ratio of the high-viscosity nylon 1012 to the high-viscosity elastomer to be 10:1, enabling the auxiliary agent to consist of an antioxidant, a light stabilizer, a copper resisting agent and a lubricating agent, enabling the temperature of a 1-9 area of a double-screw extruder to be 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 245 ℃, 240 ℃, 235 ℃ and 235 ℃, adjusting the feeding of the double-screw extruder to enable the motor current to reach a rated value of 80%, enabling extruded cooling water to pass through a circulating water tank, using water for granulation or grain cutting, screening unqualified products to return to the double-screw extruder for production, and drying and adopting vacuum drying.
The invention has the beneficial effects that:
the preparation method comprises the steps of preparing modified copolymerized nylon 1012 from decamethylenediamine, dodecanedioic acid and sebacic acid, controlling melt index viscosity through a conical vacuum rotary dryer, adding a nylon 1012 monomer generated from the decamethylenediamine and the dodecanedioic acid, adding a high-viscosity nylon elastomer prepared from polytetramethylene glycol and dimer acid, an N-ethyl o-p-toluenesulfonamide plasticizer and an auxiliary agent, further improving the flexibility of the copolymerized nylon 1012, improving the low temperature resistance of the material, and simultaneously keeping the transparency of the material;
the special material for the transparent nylon pipe is prepared by blending and extruding double screws at a proper screw combination and temperature, has high toughness, excellent low temperature property, good wear resistance, low water absorption, stable dimension and good extrusion processability, raw materials and other additives required by the main material can be completely made from China, the performance of the pipe is comparable to that of similar products abroad, the cost is obviously reduced, the defects of foreign raw materials and technical dependence are overcome, and the special material can be applied to manufacturing automobile brake pipes, oil pipelines and transparent pipes with the requirements on low temperature resistance, high toughness and the like.
Drawings
FIG. 1 is a flow chart of the preparation method of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Example 1:
a preparation method of a special material for nylon pipes comprises the following steps:
(1) preparation of high viscosity nylon 1012: decamethylene diamine, dodecanedioic acid and sebacic acid are mixed according to a mass ratio of 2.5: 3:1, adding the mixture and distilled water into a kettle, raising the temperature and the pressure to 240 ℃, discharging water vapor, reducing the pressure to 1.5MPa, reacting for 2 hours, then reducing the pressure to normal pressure, controlling the temperature to 250 ℃, pressurizing, extruding, cooling, granulating, drying and packaging to obtain transparent copolymerized nylon 1012;
adding 100Kg of copolymerized nylon 1012 into a conical vacuum rotary dryer, heating to 165 ℃, reacting for 8 hours under negative pressure of-0.098 MPa, detecting the melt index, and controlling the melt index at 4-6g/10min to obtain high-viscosity nylon 1012;
(2) preparing a high-viscosity nylon elastomer: adding decamethylenediamine and dodecanedioic acid into a neutralization kettle with alcohol according to the mass ratio of 25:33, heating to 110 ℃, discharging water vapor under normal pressure environment to maintain the pressure, reacting for 2 hours, filtering, cooling, and performing centrifugal separation to obtain a filter cake to obtain a nylon 1012 monomer;
nylon 1012 monomer, polybutylene glycol and dimer acid are mixed according to the mass ratio of 85: 10: 5, feeding the mixture into a polymerization kettle, adding a heat stabilizer, namely phosphorous acid and a heat stabilizer HT-26 according to the mass ratio of 0.3 percent and a catalyst, namely sodium ethoxide and ammonium salt according to the mass ratio of 0.05 percent, raising the temperature and the pressure to 240 ℃, discharging water vapor, and controlling the pressure to 1.5MPa, reacting for 3 hours, then reducing the temperature to normal pressure, controlling the temperature to 250 ℃, pressurizing and extruding, cooling, granulating or pelletizing, drying and packaging to obtain a transparent nylon elastomer;
adding 50Kg of nylon elastomer into a conical vacuum rotary dryer, heating to 165 ℃, reacting for 8 hours under negative pressure of-0.098 MPa, detecting the melt index, and controlling the melt index to be less than or equal to 10g/10min to obtain the high-viscosity nylon elastomer;
(3) preparing a finished product: high-viscosity nylon 1012 and high-viscosity nylon elastomer are conveyed into respective storage bins through pipelines under negative pressure, plasticizer and assistant are respectively added into corresponding auxiliary bins and assistant bins, and the weight ratio of the high-viscosity nylon 1012, the high-viscosity nylon elastomer, the plasticizer and the assistant is as follows: 85: 8.5: 5: 1.5 putting the mixture into a double-screw extruder, wherein the auxiliary agents comprise an antioxidant 1098, an antioxidant 168, a light stabilizer UV-622, a copper inhibitor 1024 and a lubricant silicone powder according to the mass ratio of 0.3:0.1:0.5:0.3: 0.3;
the temperature of a heating zone of the double-screw extruder 1-9 is 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 245 ℃, 240 ℃, 235 ℃ and 235 ℃, the feeding of the double-screw extruder is adjusted to ensure that the current of the motor reaches the rated value of 80 percent, water is used for extruding, cooling and extruding cooling water through a circulating water tank, unqualified products are screened and returned to the double-screw extruder for production after granulation or grain cutting, and the special material for the finished transparent nylon tube is obtained by adopting vacuum drying and packaging.
Example 2:
a preparation method of a special material for nylon pipes comprises the following steps:
(1) preparation of high viscosity nylon 1012: decamethylene diamine, dodecanedioic acid and sebacic acid are mixed according to a mass ratio of 2.5: 3:1, adding the mixture and distilled water into a kettle, raising the temperature and the pressure to 240 ℃, discharging water vapor, reducing the pressure to 1.5MPa, reacting for 3 hours, then reducing the pressure to normal pressure, controlling the temperature to 250 ℃, pressurizing, extruding, cooling, granulating, drying and packaging to obtain transparent copolymerized nylon 1012;
adding 100Kg of copolymerized nylon 1012 into a conical vacuum rotary dryer, heating to 165 ℃, reacting for 8 hours under negative pressure of-0.098 MPa, detecting the melt index, and controlling the melt index at 4-6g/10min to obtain high-viscosity nylon 1012;
(2) preparing a high-viscosity nylon elastomer: adding decamethylenediamine and dodecanedioic acid into a neutralization kettle with alcohol according to the mass ratio of 25:33, heating to 110 ℃, discharging water vapor under normal pressure environment to maintain the pressure, reacting for 2 hours, filtering, cooling, and performing centrifugal separation to obtain a filter cake to obtain a nylon 1012 monomer; nylon 1012 monomer, polybutylene glycol and dimer acid are mixed according to the mass ratio of 85: 10: 5, feeding the mixture into a polymerization kettle, adding a heat stabilizer, namely phosphorous acid and a heat stabilizer HT-26 according to the mass ratio of 0.3 percent and a catalyst, namely sodium ethoxide and ammonium salt according to the mass ratio of 0.05 percent, raising the temperature and the pressure to 240 ℃, discharging water vapor, and controlling the pressure to 1.5MPa, reacting for 2 hours, then reducing the temperature to normal pressure, controlling the temperature to 250 ℃, pressurizing and extruding, cooling, granulating or pelletizing, drying and packaging to obtain a transparent nylon elastomer;
adding 50Kg of nylon elastomer into a conical vacuum rotary dryer, heating to 165 ℃, reacting for 8 hours under negative pressure of-0.098 MPa, detecting the melt index, and controlling the melt index to be less than or equal to 10g/10min to obtain the high-viscosity nylon elastomer;
(3) preparing a finished product: high-viscosity nylon 1012 and high-viscosity nylon elastomer are conveyed into respective storage bins through pipelines under negative pressure, plasticizer and assistant are respectively added into corresponding auxiliary bins and assistant bins, and the weight ratio of the high-viscosity nylon 1012, the high-viscosity nylon elastomer, the plasticizer and the assistant is as follows: 85: 8.5: 3:1, putting the mixture into a double-screw extruder, wherein the auxiliary agents comprise an antioxidant 1098, an antioxidant 168, a light stabilizer UV-622, a copper inhibitor 1024 and a lubricant silicone powder according to the mass ratio of 0.3:0.1:0.2:0.2: 0.2;
the temperature of a heating zone of the double-screw extruder 1-9 is 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 245 ℃, 240 ℃, 235 ℃ and 235 ℃, the feeding of the double-screw extruder is adjusted to ensure that the current of the motor reaches the rated value of 80 percent, water is used for extruding, cooling and extruding cooling water through a circulating water tank, unqualified products are screened and returned to the double-screw extruder for production after granulation or grain cutting, and the special material for the finished transparent nylon tube is obtained by adopting vacuum drying and packaging.
Example 3:
a preparation method of a special material for nylon pipes comprises the following steps:
(1) preparation of high viscosity nylon 1012: decamethylene diamine, dodecanedioic acid and sebacic acid are mixed according to a mass ratio of 2.5: 3:1, adding the mixture and distilled water into a kettle, raising the temperature and the pressure to 240 ℃, discharging water vapor, reducing the pressure to 1.5MPa, reacting for 3 hours, then reducing the pressure to normal pressure, controlling the temperature to 250 ℃, pressurizing, extruding, cooling, granulating, drying and packaging to obtain transparent copolymerized nylon 1012;
adding 100Kg of copolymerized nylon 1012 into a conical vacuum rotary dryer, heating to 165 ℃, reacting for 8 hours under negative pressure of-0.098 MPa, detecting the melt index, and controlling the melt index at 4-6g/10min to obtain high-viscosity nylon 1012;
(2) preparing a high-viscosity nylon elastomer: adding decamethylenediamine and dodecanedioic acid into a neutralization kettle with alcohol according to the mass ratio of 25:33, heating to 110 ℃, discharging water vapor under normal pressure environment to maintain the pressure, reacting for 2 hours, filtering, cooling, and performing centrifugal separation to obtain a filter cake to obtain a nylon 1012 monomer;
nylon 1012 monomer, polybutylene glycol and dimer acid are mixed according to the mass ratio of 85: 10: 5, feeding the mixture into a polymerization kettle, adding a heat stabilizer, namely phosphorous acid and a heat stabilizer HT-26 according to the mass ratio of 0.3 percent and a catalyst, namely sodium ethoxide and ammonium salt according to the mass ratio of 0.05 percent, raising the temperature and the pressure to 240 ℃, discharging water vapor, and controlling the pressure to 1.5MPa, reacting for 2 hours, then reducing the temperature to normal pressure, controlling the temperature to 250 ℃, pressurizing and extruding, cooling, granulating or pelletizing, drying and packaging to obtain a transparent nylon elastomer;
adding 50Kg of nylon elastomer into a conical vacuum rotary dryer, heating to 160-165 ℃, reacting for 8 hours under negative pressure of-0.098 MPa, detecting the melt index, and controlling the melt index to be less than or equal to 10g/10min to obtain the high-viscosity nylon elastomer;
(3) preparing a finished product: high-viscosity nylon 1012 and high-viscosity nylon elastomer are conveyed into respective storage bins through pipelines under negative pressure, plasticizer and assistant are respectively added into corresponding auxiliary bins and assistant bins, and the weight ratio of the high-viscosity nylon 1012, the high-viscosity nylon elastomer, the plasticizer and the assistant is as follows: 85: 8.5: 8: 2, putting the mixture into a double-screw extruder, wherein the auxiliary agents comprise an antioxidant 1098, an antioxidant 168, a light stabilizer UV-622, a copper inhibitor 1024 and a lubricant silicone powder according to the mass ratio of 0.5:0.2:0.5:0.3: 0.5;
the temperature of a heating zone of the double-screw extruder 1-9 is 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 245 ℃, 240 ℃, 235 ℃ and 235 ℃, the feeding of the double-screw extruder is adjusted to ensure that the current of the motor reaches the rated value of 80 percent, water is used for extruding, cooling and extruding cooling water through a circulating water tank, unqualified products are screened and returned to the double-screw extruder for production after granulation or grain cutting, and the special material for the finished transparent nylon tube is obtained by adopting vacuum drying and packaging.
The light stabilizer, the antioxidant 1010, the antioxidant 168 and the copper inhibitor in the components are purchased from Rianlong company, and the silicone powder is purchased from Hangzhou Qianje company. The heat stabilizer is any one or combination of phosphorous acid and a heat stabilizer HT-26, and the catalyst is any one or combination of sodium ethoxide and ammonium salt.
Experimental examples 1-3 comparative performance test of the special material for the yarn bobbin;
the special material for nylon tubes prepared by drying in examples 1-3 is special material for No. 1-3, No. 4 PA11 tubes and special material for No. 5 PA12 tubes, and national standard test samples are respectively manufactured by an injection molding machine, and the test performances are shown in the following table:
the preparation method comprises the steps of preparing modified copolymerized nylon 1012 from decamethylenediamine, dodecanedioic acid and sebacic acid, controlling melt index viscosity through a conical vacuum rotary dryer, adding a nylon 1012 monomer generated from the decamethylenediamine and the dodecanedioic acid, adding a high-viscosity nylon elastomer prepared from polytetramethylene glycol and dimer acid, an N-ethyl o-p-toluenesulfonamide plasticizer and an auxiliary agent, and blending and extruding the nylon elastomer and the plasticizer at a proper screw combination and temperature through a double screw, wherein the flexibility of the copolymerized nylon 1012 is further improved through the transparent nylon elastomer, and the low-temperature resistance of the material is improved; meanwhile, the transparency of the material is kept; the plasticizer plays a role in lubrication, lowers the plasticizing temperature of the material, and ensures stable and convenient later processing; the transparent nylon tube special material is prepared by blending and extruding the double screws at a proper screw combination and temperature, has low water absorption, stable size and good extrusion processability, and the raw materials and other additives required by the main material can be all made from domestic products, and the process method is simple and easy to operate;
the above table shows that the special material for the transparent nylon tube prepared by the invention has high toughness, excellent low temperature property and good wear resistance, the performance of the tube is comparable to that of the similar products abroad, the defects of foreign raw materials and technical dependence are overcome, the special material can completely replace foreign PA11 and PA12, the price is far better than that of the foreign products, the transparency is higher, and the special material can be widely applied to manufacturing automobile brake tubes, oil delivery tubes and tubes requiring low temperature resistance, high toughness and the like.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in 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. The special material for the transparent nylon tube is characterized by comprising the following components in parts by weight:
the high-viscosity nylon 1012 is prepared from decamethylene diamine, dodecanedioic acid and sebacic acid, and the high-viscosity nylon elastomer is prepared from a nylon 1012 monomer, polybutylene glycol and dimer acid.
2. The material as claimed in claim 1, wherein the high viscosity nylon 1012, the high viscosity elastomer, the plasticizer and the auxiliary agent are 85: 8.5: 5: 1.5.
3. the material as claimed in claim 1, wherein the mass ratio of decamethylene diamine, dodecanedioic acid, and sebacic acid is 2.5: 3:1, and the melt index of the high-viscosity nylon 1012 is 4-6g/10 min.
4. The material as claimed in claim 1, wherein the nylon 1012 monomer is made of decamethylene diamine and dodecanedioic acid at a mass ratio of 25:33, and the nylon 1012 monomer, PTMG and dimer acid are 85: 10: 5, the melt index of the high-viscosity nylon elastomer is less than or equal to 10g/10 min.
5. The material as claimed in claim 1, wherein the plasticizer is N-ethyl o-p-toluenesulfonamide.
6. The material as claimed in claim 1, wherein the auxiliary agent is one or more of an antioxidant, a light stabilizer, a copper inhibitor and a lubricant.
7. The preparation method of the special material for the nylon pipe as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) preparation of high viscosity nylon 1012: adding decamethylenediamine, dodecanedioic acid, sebacic acid and distilled water into a kettle, heating and boosting pressure to discharge water vapor, reacting for 2-3h, then reducing to normal pressure, pressurizing and extruding, cooling, granulating, drying and packaging to obtain transparent copolymerized nylon 1012; adding the copolymerized nylon 1012 into a conical vacuum rotary dryer, heating and reacting for 6-8h under negative pressure to obtain high-viscosity nylon 1012;
(2) preparing a high-viscosity nylon elastomer: adding decamethylenediamine, dodecanedioic acid and alcohol into a neutralization kettle, heating, discharging water vapor under normal pressure to maintain the pressure, reacting for 1-2h, filtering, cooling, and centrifuging to obtain a filter cake to obtain a nylon 1012 monomer;
feeding a nylon 1012 monomer, polybutylene glycol and dimer acid into a polymerization kettle, heating and boosting, discharging water vapor, reacting for 2-3h, then reducing the pressure to normal pressure, pressurizing and extruding, cooling, granulating or granulating, drying and packaging to obtain a transparent nylon elastomer; adding the nylon elastomer into a conical vacuum rotary dryer, heating and reacting for 6-8h under negative pressure to obtain the high-viscosity nylon elastomer;
(3) preparing a finished product: high-viscosity nylon 1012 and high-viscosity nylon elastomer are conveyed into respective storage bins through pipelines under negative pressure, plasticizer and assistant are respectively added into corresponding auxiliary bins and assistant bins, and the weight ratio of the high-viscosity nylon 1012, the high-viscosity nylon elastomer, the plasticizer and the assistant is as follows: (80-90): (5-10): (5-10): and (1-2) putting the mixture into a double-screw extruder, extruding, cooling, granulating, drying and packaging to obtain the final special material for the transparent nylon tube finished product.
8. The method for preparing the material special for the nylon tube as claimed in claim 7, wherein the mass ratio of the decamethylene diamine, the dodecanedioic acid and the sebacic acid in the preparation of the copolymerized nylon 1012 in the step (1) is 2.5: 3:1, wherein the temperature is 240 ℃ and the pressure is 1.5MPa when the temperature and the pressure are increased, and the temperature is controlled at 240 ℃ and 250 ℃ after the pressure is reduced to the normal pressure; when preparing the high-viscosity nylon 1012, the temperature is raised to 160-165 ℃, the negative pressure is minus 0.098MPa, and the melt index is detected and controlled to be 4-6g/10min after the reaction.
9. The method as claimed in claim 7, wherein the mass ratio of decamethylenediamine to dodecanedioic acid is 25:33, and the temperature is increased to 110-130 ℃ during the preparation of the nylon 1012 monomer in step (2); when the nylon elastomer is prepared, the mass ratio of the nylon 1012 monomer to the polybutylene glycol to the dimer acid is 85: 10: 5, adding a heat stabilizer and a catalyst into the polymerization kettle, heating to 240 ℃, boosting to 1.5MPa, and controlling the temperature to be 250 ℃ after reducing to normal pressure; when preparing the high-viscosity nylon elastomer, the temperature is raised to 160-165 ℃, the negative pressure is-0.098 MPa, and the melt index is detected and controlled to be less than or equal to 10g/10min after the reaction.
10. The method for preparing the material special for the nylon pipe as claimed in claim 7, wherein the weight ratio of the high-viscosity nylon 1012 to the high-viscosity elastomer in the step (3) is 10:1, the auxiliary agent comprises an antioxidant, a light stabilizer, a copper inhibitor and a lubricant, the temperature of a 1-9 zone of the twin-screw extruder is 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 245 ℃, 240 ℃, 235 ℃ and 235 ℃, the feeding of the twin-screw extruder is adjusted to enable the motor current to reach a rated value of 80%, the extruded cooling water is used for water in a circulating water tank, and after granulation or grain cutting, the unqualified product is screened and returned to the twin-screw extruder for production, and vacuum drying is adopted.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115491031A (en) * | 2022-10-27 | 2022-12-20 | 山东东辰瑞森新材料科技有限公司 | Long carbon chain nylon molding compound for preparing non-shrinkage-cavity high-strength thick product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604373A (en) * | 2012-02-23 | 2012-07-25 | 无锡殷达尼龙有限公司 | Formula of nylon hose |
| CN109943069A (en) * | 2019-03-21 | 2019-06-28 | 山东广垠新材料有限公司 | A kind of preparation method of automobile pipeline system long carbon chain nylon material |
| CN111349232A (en) * | 2020-04-22 | 2020-06-30 | 建湖县兴隆尼龙有限公司 | Nylon elastomer material and preparation method thereof |
-
2020
- 2020-11-24 CN CN202011326368.9A patent/CN112457666A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102604373A (en) * | 2012-02-23 | 2012-07-25 | 无锡殷达尼龙有限公司 | Formula of nylon hose |
| CN109943069A (en) * | 2019-03-21 | 2019-06-28 | 山东广垠新材料有限公司 | A kind of preparation method of automobile pipeline system long carbon chain nylon material |
| CN111349232A (en) * | 2020-04-22 | 2020-06-30 | 建湖县兴隆尼龙有限公司 | Nylon elastomer material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115491031A (en) * | 2022-10-27 | 2022-12-20 | 山东东辰瑞森新材料科技有限公司 | Long carbon chain nylon molding compound for preparing non-shrinkage-cavity high-strength thick product |
| CN115491031B (en) * | 2022-10-27 | 2023-08-11 | 山东东辰瑞森新材料科技有限公司 | Long carbon chain nylon molding compound for preparing shrinkage-cavity-free high-strength thick product |
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