PVC (polyvinyl chloride) extrusion profile formula capable of improving heat insulation level and processing technology of PVC extrusion profile formula

Abstract

The invention discloses a PVC (Polyvinyl Chloride) extrusion profile formula capable of improving a heat insulation level and a processing technology of the PVC extrusion profile formula. The formula is composed of the following raw materials in parts by weight: 100 parts of PVC resin, 4-25 parts of aerogel powder, 2-6 parts of a calcium-zinc thermal stabilizing aid, 0.5-2.5 parts of a TPA toughening processing aid, 2-4 parts of a silane coupling agent, 5-10 parts of inorganic flame-retardant magnesium hydroxide, 6-30 parts of calcium carbonate, 0.1-0.7 part of ACS resin, 1-8 parts of MBS, 0.1-0.6 part of fatty acid ester and 2-3 parts of a plasticizer. The characteristics of heat insulation, light weight and small aperture of aerogel are utilized, the use amount of calcium carbonate is reduced, and after PVC is cured and extruded, the heat insulation level of an extruded part is improved, the linear weight is reduced, and the sound insulation effect of a cavity is improved. Meanwhile, magnesium hydroxide is added, so that a reinforced empty carbon layer is formed during combustion of the profile, and the flame-retardant and smoke-suppression effects are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical strength and thermal insulation performance of PVC products, and in particular to a PVC extrusion profile formula with improved thermal insulation level and a processing technology thereof. Background Art

[0002] PVC is one of the most produced general-purpose plastics in the world. Its excellent mechanical properties, corrosion resistance and electrical insulation properties, coupled with its low production cost, make it widely used in the electrical, construction and automotive fields.

[0003] Since the molecular chain of PVC plastic has high polarity and poor plasticity, it is necessary to add more than 40% of plasticizers and fillers (calcium carbonate) and other materials to make its thermal conductivity as high as 0.31-0.45W / (m*K). The plasticizer added to PVC greatly weakens the flame retardant performance of PVC, and a large amount of black smoke is generated in the combustion chamber. Therefore, flame retardancy, smoke suppression, and reduction of thermal conductivity are urgently needed to solve the problems of flame retardancy, smoke suppression, and high thermal conductivity. Summary of the invention

[0004] The main purpose of the invention is to provide a PVC extrusion profile formula with improved thermal insulation level and a processing technology thereof, aiming to solve the existing technical problems.

[0005] To achieve the above object, the present invention provides a PVC extrusion profile formula with improved thermal insulation level, which is composed of the following raw materials in parts by weight:

[0006] 100 parts of PVC resin, 4-25 parts of aerogel powder, 2-6 parts of calcium zinc heat stabilizer, 0.5-2.5 parts of TPA toughening processing aid, 2-4 parts of silane coupling agent, 5-10 parts of inorganic flame retardant magnesium hydroxide, 6-30 parts of calcium carbonate, 0.1-0.7 parts of ACS resin, 1-8 parts of MBS, 0.1-0.6 parts of fatty acid ester, and 2-3 parts of plasticizer.

[0007] Furthermore, the following components are included in the proportion by weight:

[0008] 100 parts of PVC resin, 8 parts of aerogel powder, 2.5 parts of calcium zinc heat stabilizing agent, 0.8 parts of TPA toughening processing aid, 2.5 parts of silane coupling agent, 7 parts of inorganic flame retardant magnesium hydroxide, 10 parts of calcium carbonate, 0.3 parts of ACS resin, 2 parts of MBS, 0.2 parts of fatty acid ester, and 2 parts of plasticizer.

[0009] Furthermore, the following components are included in the proportion by weight:

[0010] 100 parts of PVC resin, 15 parts of aerogel powder, 4 parts of calcium zinc heat stabilizer, 1.5 parts of TPA toughening processing aid, 3.5 parts of silane coupling agent, 9 parts of inorganic flame retardant magnesium hydroxide, 25 parts of calcium carbonate, 0.6 parts of ACS resin, 7 parts of MBS, 0.4 parts of fatty acid ester, and 3 parts of plasticizer.

[0011] Furthermore, the ACS resin is obtained by combining CPE rubber and AS plastic through graft copolymerization of acrylonitrile and styrene.

[0012] Furthermore, the MBS is any one of terpolymers of methyl methacrylate, butadiene and styrene.

[0013] Furthermore, the plasticizer is any one of DOTP and dioctyl terephthalate.

[0014] A processing technology for the PVC extrusion profile formula with improved thermal insulation level as described above specifically comprises the following steps:

[0015] Raw material metering and batching: the raw materials are batched according to the formula components to obtain a mixture;

[0016] Hot mixing: put the prepared mixture into a hot mixer and hot mix it for 5 to 6.5 minutes;

[0017] Cold mixing: cold mixing in a cold mixer for 1 to 2 minutes;

[0018] Ripening: 6 to 8 hours;

[0019] Extrusion traction molding: PVC products are extruded through an extruder;

[0020] Profile cooling and cutting: Cool the profile to 25-35°C and then cut it into the required size;

[0021] Clean and air dry: Clean and air dry with an air gun.

[0022] Furthermore, the temperature of the hot mixing is 95°C to 110°C.

[0023] Furthermore, the temperature of the cold mix is ​​35°C to 50°C.

[0024] Furthermore, the temperature of the extrusion traction molding is 35° C. to 50° C. and the rotation speed is 28 to 35 r / min.

[0025] The beneficial effects of the present invention are embodied in:

[0026] The present invention utilizes the thermal insulation, light weight and small pore size characteristics of aerogel to reduce the amount of calcium carbonate used, improve the thermal insulation level of the extruded part after PVC ripening and extrusion, reduce the line weight, and improve the sound insulation effect of the cavity. At the same time, magnesium hydroxide is added to form a reinforced carbon layer during the combustion of the profile, achieving a flame retardant and smoke suppression effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a schematic diagram of the processing process of the PVC extrusion profile formulation of the present invention. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] The present invention provides a PVC extrusion profile formula with improved thermal insulation level, which is composed of the following raw materials in parts by weight:

[0030] 100 parts of PVC resin, 4-25 parts of aerogel powder, 2-6 parts of calcium zinc heat stabilizer, 0.5-2.5 parts of TPA toughening processing aid, 2-4 parts of silane coupling agent, 5-10 parts of inorganic flame retardant magnesium hydroxide, 6-30 parts of calcium carbonate, 0.1-0.7 parts of ACS resin, 1-8 parts of MBS, 0.1-0.6 parts of fatty acid ester, and 2-3 parts of plasticizer.

[0031] The following components are included in the proportion by weight:

[0032] 100 parts of PVC resin, 8 parts of aerogel powder, 2.5 parts of calcium zinc heat stabilizing agent, 0.8 parts of TPA toughening processing aid, 2.5 parts of silane coupling agent, 7 parts of inorganic flame retardant magnesium hydroxide, 10 parts of calcium carbonate, 0.3 parts of ACS resin, 2 parts of MBS, 0.2 parts of fatty acid ester, and 2 parts of plasticizer.

[0033] The following components are included in the proportion by weight:

[0034] 100 parts of PVC resin, 15 parts of aerogel powder, 4 parts of calcium zinc heat stabilizer, 1.5 parts of TPA toughening processing aid, 3.5 parts of silane coupling agent, 9 parts of inorganic flame retardant magnesium hydroxide, 25 parts of calcium carbonate, 0.6 parts of ACS resin, 7 parts of MBS, 0.4 parts of fatty acid ester, and 3 parts of plasticizer.

[0035] Among them, calcium zinc heat stabilizing additives: such as Maike MK-W5035, MK-F6005, play a role in processing heat stability and fluidity; improve low-temperature impact performance without reducing strength; plasticization is more uniform;

[0036] TPA toughening processing aid: such as Maike TPA-107; sulfur-containing functional groups can participate in the vulcanization process, and the mercapto group has active hydrogen, which can be used for end-capping modification. The dual reactivity allows it to improve the bonding, adhesion and compatibility between inorganic materials (glass, metal, filler) and organic polymers (thermosetting resins, plastics, elastomers) through a two-way chemical reaction, thereby improving the mechanical properties of resin-based composite materials or improving the bonding strength and water resistance of resin coatings.

[0037] Silane coupling agent: such as Dow Corning silane coupling agent KH-580; increase the flame retardant and smoke suppression of the composite structure between magnesium hydroxide and aerogel powder, and use the low thermal conductivity and reinforced carbon layer characteristics of aerogel powder to achieve synergistic flame retardant and smoke suppression effects;

[0038] Inorganic flame retardant magnesium hydroxide (Mg(OH)2): Zehui brand of Zemei Technology;

[0039] Calcium carbonate: inorganic filler

[0040] ACS resin: CPE rubber body and AS plastic are combined and made by grafting acrylonitrile and styrene. It is impact-resistant, resistant to static pollution, flame-retardant, and weather-resistant;

[0041] MBS: impact modified;

[0042] Fatty acid esters: surfactants;

[0043] Plasticizer: Improves processing performance.

[0044] ACS resin is a combination of CPE rubber and AS plastic, which is grafted and copolymerized with acrylonitrile and styrene.

[0045] MBS is any one of the terpolymers of methyl methacrylate, butadiene and styrene.

[0046] The plasticizer is any one of DOTP and dioctyl terephthalate.

[0047] See also Figure 1 The processing technology of the PVC extrusion profile formula with improved thermal insulation level specifically comprises the following steps:

[0048] Raw material metering and batching: the raw materials are batched according to the formula components to obtain a mixture;

[0049] Hot mixing: put the prepared mixture into a hot mixer and hot mix it for 5 to 6.5 minutes;

[0050] Cold mixing: cold mixing in a cold mixer for 1 to 2 minutes;

[0051] Ripening: 6 to 8 hours;

[0052] Extrusion traction molding: PVC products are extruded through an extruder;

[0053] Profile cooling and cutting: Cool the profile to 25-35°C and then cut it into the required size;

[0054] Clean and air dry: Clean and air dry with an air gun.

[0055] The temperature of the hot mixing is 95°C to 110°C.

[0056] The temperature of the cold mix is ​​35°C to 50°C.

[0057] The temperature of the extrusion traction molding is 35°C to 50°C and the rotation speed is 28 to 35 r / min.

[0058] Embodiment 1:

[0059] The formula of PVC extrusion profile with improved insulation level includes the following components in parts by weight:

[0060] 100 parts of PVC resin, 10 parts of aerogel powder, 3 parts of calcium zinc heat stabilizer, 1 part of TPA toughening processing aid, 2 parts of silane coupling agent, 8 parts of inorganic flame retardant magnesium hydroxide, 20 parts of calcium carbonate, 0.2 parts of ACS resin, 5 parts of MBS, 0.5 parts of fatty acid ester, and 3 parts of plasticizer.

[0061] The processing technology of PVC extrusion profile formula specifically includes the following steps:

[0062] Raw material metering and batching: the raw materials are batched according to the formula components to obtain a mixture;

[0063] Hot mixing: the prepared mixture was placed in a hot mixer and hot mixed at 100°C for 5.5 min;

[0064] Cold mixing: cold mixing in a cold mixer at 50°C for 1.5 min;

[0065] Maturation: 8 hours;

[0066] Extrusion traction molding: PVC products are extruded through an extruder at 170°C and 35r / min;

[0067] Profile cooling and cutting: Cool the profile to 35°C and then cut it into the required size;

[0068] Clean and air dry: Clean and air dry with an air gun.

[0069] Embodiment 2:

[0070] The formula of PVC extrusion profile with improved insulation level includes the following components in parts by weight:

[0071] 100 parts of PVC resin, 20 parts of aerogel powder, 5 parts of calcium zinc heat stabilizer, 1 part of TPA toughening processing aid, 3 parts of silane coupling agent, 10 parts of inorganic flame retardant magnesium hydroxide, 15 parts of calcium carbonate, 0.5 parts of ACS resin, 3 parts of MBS, 0.3 parts of fatty acid ester, and 3 parts of plasticizer.

[0072] The processing technology of PVC extrusion profile formula specifically includes the following steps:

[0073] Raw material metering and batching: the raw materials are batched according to the formula components to obtain a mixture;

[0074] Hot mixing: the prepared mixture was placed in a hot mixer and hot mixed at 105°C for 6.5 min;

[0075] Cold mixing: cold mixing in a cold mixer at 35°C for 2 minutes;

[0076] Maturation: 8 hours;

[0077] Extrusion traction molding: PVC products are extruded through an extruder at 200°C and 28r / min;

[0078] Profile cooling and cutting: Cool the profile to 35°C and then cut it into the required size;

[0079] Clean and air dry: Clean and air dry with an air gun.

[0080] Comparative Example:

[0081] The formula of PVC extrusion profile with improved insulation level includes the following components in parts by weight:

[0082] 100 parts of PVC resin, 0 parts of aerogel powder, 3 parts of calcium zinc heat stabilizer, 1 part of TPA toughening processing aid, 2 parts of silane coupling agent, 8 parts of inorganic flame retardant magnesium hydroxide, 20 parts of calcium carbonate, 0.2 parts of ACS resin, 5 parts of MBS, 0.5 parts of fatty acid ester, and 3 parts of plasticizer.

[0083] The formula and processing technology of the PVC extrusion profile of the comparative example are the same as those of comparative example 1.

[0084] Performance comparison:

[0085]

[0086]

[0087] From the parameters in the above table, it can be seen that: aerogel powder is used as filler to replace part of the calcium carbonate usage, improve the insulation level and reduce the line weight; aerogel powder and magnesium hydroxide form a composite flame retardant to increase the oxygen index and reduce the smoke density; TPA toughening processing aid and silane coupling agent are used to improve the plasticization level and improve low-temperature impact resistance; ACS resin and MBS resin are used to improve impact resistance, electrostatic pollution resistance, weather resistance, and flame retardancy.

[0088] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A PVC extrusion profile formula with improved thermal insulation level, characterized in that: It is composed of the following raw materials in parts by weight: 100 parts of PVC resin, 4-25 parts of aerogel powder, 2-6 parts of calcium zinc heat stabilizer, 0.5-2.5 parts of TPA toughening processing aid, 2-4 parts of silane coupling agent, 5-10 parts of inorganic flame retardant magnesium hydroxide, 6-30 parts of calcium carbonate, 0.1-0.7 parts of ACS resin, 1-8 parts of MBS, 0.1-0.6 parts of fatty acid ester, and 2-3 parts of plasticizer.

2. A PVC extrusion profile formula for improving thermal insulation level as claimed in claim 1, characterized in that: The following components are included in the proportion by weight: 100 parts of PVC resin, 8 parts of aerogel powder, 2.5 parts of calcium zinc heat stabilizing agent, 0.8 parts of TPA toughening processing aid, 2.5 parts of silane coupling agent, 7 parts of inorganic flame retardant magnesium hydroxide, 10 parts of calcium carbonate, 0.3 parts of ACS resin, 2 parts of MBS, 0.2 parts of fatty acid ester, and 2 parts of plasticizer.

3. A PVC extrusion profile formula for improving thermal insulation level as claimed in claim 1, characterized in that: The following components are included in the proportion by weight: 100 parts of PVC resin, 15 parts of aerogel powder, 4 parts of calcium zinc heat stabilizer, 1.5 parts of TPA toughening processing aid, 3.5 parts of silane coupling agent, 9 parts of inorganic flame retardant magnesium hydroxide, 25 parts of calcium carbonate, 0.6 parts of ACS resin, 7 parts of MBS, 0.4 parts of fatty acid ester, and 3 parts of plasticizer.

4. A PVC extrusion profile formula for improving thermal insulation level as claimed in claim 1, characterized in that: The ACS resin is a combination of CPE rubber and AS plastic, which is obtained by graft copolymerization of acrylonitrile and styrene.

5. A PVC extrusion profile formula for improving thermal insulation level as claimed in claim 1, characterized in that: The MBS is any one of terpolymers of methyl methacrylate, butadiene and styrene.

6. A PVC extrusion profile formula for improving thermal insulation level as claimed in claim 1, characterized in that: The plasticizer is any one of DOTP and dioctyl terephthalate.

7. A processing technology for improving the thermal insulation level of a PVC extrusion profile formulation according to any one of claims 1 to 6, characterized in that: The specific steps include: Raw material metering and batching: the raw materials are batched according to the formula components to obtain a mixture; Hot mixing: Place the prepared mixture in a hot mixer and heat mix it at 95°C to 110°C for 5 to 6.5 minutes; Cold mixing: cold mixing in a cold mixer at 35℃~50℃ for 1~2min; Ripening: 6 to 8 hours; Extrusion traction molding: PVC products are extruded through an extruder at 170℃~200℃ and 28~35r / min; Profile cooling and cutting: Cool the profile to 25-35°C and then cut it into the required size; Clean and air dry: Clean and air dry with an air gun.

8. The processing technology of the PVC extrusion profile formula with improved thermal insulation level as claimed in claim 7, characterized in that: The temperature of the thermal mixing is 95°C to 110°C.

9. The processing technology of the PVC extrusion profile formula with improved thermal insulation level as claimed in claim 7, characterized in that: The temperature of the cold mix is ​​35°C to 50°C.

10. The processing technology of the PVC extrusion profile formula with improved thermal insulation level as claimed in claim 7, characterized in that: The temperature of the extrusion traction molding is 35° C. to 50° C. and the rotation speed is 28 to 35 r / min.

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