PVC / ABS (polyvinyl chloride / acrylonitrile-butadiene-styrene) alloy material as well as preparation method and application thereof

Abstract

The invention provides a PVC / ABS (polyvinyl chloride / acrylonitrile-butadiene-styrene) alloy material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The PVC / ABS alloy material is prepared from the following components in parts by weight: 30 to 60 parts of PVC resin, 30 to 60 parts of ABS resin, 2 to 4 parts of heat stabilizer, 0.5 to 1.5 parts of antioxidant, 0.3 to 0.5 part of triazine anti-ultraviolet absorbent, 0 to 5 parts of lubricant and 0 to 10 parts of filler, wherein the heat stabilizer is a compound of a maleic acid stabilizer and other stabilizers; the antioxidant is a compound of a semi-hindered phenol antioxidant and a phosphite ester antioxidant. According to the PVC / ABS alloy material disclosed by the invention, the PVC resin and the ABS resin are taken as matrixes, and the heat stabilizer, the antioxidant and the triazine ultraviolet screening agent are added, so that the aging resistance and discoloration resistance of the PVC / ABS alloy material are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and particularly relates to a PVC / ABS alloy material, a preparation method thereof and an application thereof. Background Art

[0002] Polyvinyl chloride (PVC) resin is one of the current general plastics with high cost performance. Due to its inherent advantages in flame retardant performance, PVC can be applied to many scenarios requiring high flame retardancy, such as the electronic and electrical, security, and household appliance industries. However, there are unstable groups in the structure of PVC material itself, such as allyl chloride, carbonyl group, peroxy group, etc., which are prone to induce dehydrochlorination reaction during processing and long-term use, generate conjugated double bonds, and thus cause problems such as yellowing of color. And the impact strength of PVC material is poor, and it is generally alloyed with ABS and then applied in commercial applications with high heat resistance requirements.

[0003] ABS is a ternary polymer of acrylonitrile-butadiene-styrene, which has good toughness and processability. However, there are unsaturated double bonds in the structure of ABS material, which are prone to oxidation reaction during long-term outdoor use. The weather resistance is a major shortcoming of ABS in outdoor applications. Therefore, although the alloying of PVC / ABS can achieve complementary advantages, the PVC / ABS alloy has poor aging resistance, is prone to oxidation discoloration, and problems such as rapid attenuation of impact performance. Summary of the Invention

[0004] The purpose of the present disclosure is to overcome the deficiencies of the prior art and provide a PVC / ABS alloy material, a preparation method thereof and an application thereof.

[0005] In order to solve the problems of poor aging resistance, easy oxidation discoloration, and rapid attenuation of impact performance of the PVC / ABS alloy material in the prior art.

[0006] In the first aspect of the present invention, a PVC / ABS alloy material is provided, which comprises the following components in parts by weight: 30-60 parts of PVC resin, 30-60 parts of ABS resin, 2-4 parts of heat stabilizer, 0.5-1.5 parts of antioxidant, 0.3-0.5 parts of triazine ultraviolet absorber, 0-5 parts of lubricant, and 0-10 parts of filler;

[0007] Among them, the heat stabilizer is a compound of maleic stabilizer and other stabilizers; the antioxidant is a compound of semi-hindered phenolic antioxidant and phosphite antioxidant.

[0008] In different embodiments, the parts by weight of the PVC resin can be, but are not limited to, 30 parts, 32 parts, 35 parts, 37 parts, 40 parts, 45 parts, 50 parts, 53 parts, 55 parts, 58 parts, 60 parts;

[0009] In different embodiments, the weight parts of the ABS resin can be, but are not limited to, 30 parts, 33 parts, 35 parts, 38 parts, 40 parts, 45 parts, 50 parts, 52 parts, 55 parts, 57 parts, 60 parts;

[0010] In different embodiments, the weight parts of the heat stabilizer can be, but are not limited to, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, 3 parts, 3.2 parts, 3.4 parts, 3.6 parts, 3.8 parts, 4 parts;

[0011] In different embodiments, the weight parts of the antioxidant can be, but are not limited to, 0.7 parts, 0.8 parts, 0.9 parts, 1.0 parts, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts;

[0012] In different embodiments, the weight parts of the triazine ultraviolet absorber can be, but are not limited to, 0.3 parts, 0.32 parts, 0.35 parts, 0.37 parts, 0.4 parts, 0.43 parts, 0.45 parts, 0.48 parts, 0.5 parts;

[0013] In different embodiments, the weight parts of the lubricant can be, but are not limited to, 0 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts;

[0014] In different embodiments, the weight parts of the filler can be, but are not limited to, 0 parts, 3 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts.

[0015] The PVC / ABS alloy material of the present invention is based on PVC resin and ABS resin, and a heat stabilizer, an antioxidant and a triazine ultraviolet absorber are added. Among them, the maleic acid heat stabilizer in the heat stabilizer can, on the one hand, undergo a D-A addition reaction with the conjugated double bonds generated by the thermal decomposition of the PVC resin to inhibit the yellowing of PVC. On the other hand, the double bond with relatively high reactivity in the maleic acid heat stabilizer can be the reaction object of peroxy radicals, consuming part of the peroxy radicals generated by oxidation and playing a certain protective role for the double bonds of ABS, thereby improving the aging resistance and discoloration resistance of the PVC / ABS alloy material; the compound of semi-hindered phenol antioxidant and phosphite antioxidant is used as an antioxidant to capture peroxy radicals and primary radicals, reducing the generation of quinone coloring groups, thereby playing a role in inhibiting the discoloration of the PVC / ABS alloy material; the triazine ultraviolet absorber can reduce the direct oxidative damage of ultraviolet rays to double bonds, further improving the aging resistance and discoloration resistance of the PVC / ABS alloy material.

[0016] In some embodiments, the maleic acid content of the maleic acid stabilizer is 20-65%, for example, it can be but not limited to 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%; preferably 25-43%.

[0017] In the present invention, when the maleic acid content of the maleic acid stabilizer is within the above range, the PVC / ABS alloy material has better aging resistance and discoloration resistance. If the content of maleic acid is too low, the improvement of the aging resistance and discoloration resistance of the PVC / ABS alloy material is not obvious; if the content of maleic acid is too high, the reaction probability with the double bond in ABS increases, which may lead to a decrease in the impact performance of the PVC / ABS alloy material.

[0018] Specifically, in the present invention, the maleic acid content of the maleic acid stabilizer is obtained by testing with pyrolysis-gas chromatography-mass spectrometry (PY-GC-MS). The specific steps are as follows: Take a small amount of sample, add it to the PY-GC-MS equipment, quickly heat it in an inert atmosphere to generate pyrolysis products, directly introduce the pyrolysis products into the gas chromatography system for separation, and then enter the mass spectrometer for detection. By qualitatively and quantitatively analyzing the characteristic fragment ions after high-temperature pyrolysis, the content of maleic acid is determined.

[0019] In some embodiments, the maleic acid stabilizer is at least one of alkyltin maleate, calcium maleate, zinc maleate, and antimony maleate.

[0020] Specific examples of alkyltin maleate can be dimethyltin maleate, dibutyltin maleate, and dioctyltin maleate.

[0021] In some embodiments, the other stabilizers are at least one of organic antimony stabilizers, calcium-zinc stabilizers, and organic tin stabilizers other than alkyltin maleate.

[0022] Specifically, the organic antimony stabilizer is at least one of tris(dodecyl mercaptan)antimony, tris(n-butyl mercaptoacetate)antimony, pentathiol antimony, and tris(isooctyl mercaptoacetate)antimony.

[0023] Specifically, specific examples of the calcium-zinc stabilizer are at least one of calcium stearate and zinc stearate.

[0024] Specifically, the organic tin stabilizer other than alkyltin maleate is at least one of methyl mercaptan tin, butyl mercaptan tin, octyl mercaptan tin, and dibutyltin laurate.

[0025] In some embodiments, the heat stabilizer is a compound of dimethyltin maleate and / or dibutyltin maleate and / or dioctyltin maleate and pentathiol antimony.

[0026] In some embodiments, the mass ratio of the maleic acid stabilizer to other stabilizers is 1:(0.1 - 10); preferably, the mass ratio of the maleic acid stabilizer to other stabilizers is 1:(0.5 - 3); for example, it can be but is not limited to 1:0.1, 1:0.2, 1:0.5, 1:0.8, 1:1, 1:1.5, 1:2, 1:2.5, 1:3, 1:5, 1:7, 1:10.

[0027] In some embodiments, the mass ratio of the semi - hindered phenol antioxidant to the phosphite antioxidant is 1:(0.1 - 5); preferably, the mass ratio of the semi - hindered phenol antioxidant to the phosphite antioxidant is 1:(0.3 - 1.5); for example, it can be but is not limited to 1:0.1, 1:0.3, 1:0.5, 1:1, 1:1.3, 1:1.5, 1:2, 1:3, 1:5.

[0028] In some embodiments, the semi - hindered phenol antioxidant is at least one of bis[3 - (3 - tert - butyl - 5 - methyl - 4 - hydroxyphenyl)propionate] of triethylene glycol, 1,3,5 - tris(4 - tert - butyl - 3 - hydroxy - 2,6 - dimethylbenzyl)-1,3,5 - triazine - 2,4,6 - (1H,3H,5H)-trione; the phosphite antioxidant is at least one of tris(2,4 - di - tert - butylphenyl) phosphite, bis(2,4 - di - tert - butylphenyl)pentaerythritol diphosphite.

[0029] In some embodiments, specific examples of the triazine ultraviolet absorber are 2,4 - bis(2,4 - dimethylphenyl)-6-(2 - hydroxy - 4 - n - octyloxyphenyl)-1,3,5 - triazine, 2-(4,6 - diphenyl - 1,3,5 - triazin - 2 - yl)-5 - hexyloxy - phenol, 2 - [4 - [2 - hydroxy - 3 - tridecyloxypropyl]oxy]-2 - hydroxyphenyl]-4,6 - bis(2,4 - dimethylphenyl)-1,3,5 - triazine, 2 - [2 - hydroxy - 4 - [3-(2 - ethylhexyloxy)-2 - hydroxypropoxy]phenyl]-4,6 - bis(2,4 - dimethylphenyl)-1,3,5 - triazine, 2,4 - bis[2 - hydroxy - 4 - butoxyphenyl]-6-(2,4 - dibutoxyphenyl)-1,3,5 - triazine, etc.

[0030] In some embodiments, the degree of polymerization of the PVC resin is 400 - 700; for example, it can be but is not limited to 400, 450, 500, 550, 600, 650, 700.

[0031] Specifically, the degree of polymerization of the PVC resin is obtained by the following test method, and the specific steps are:

[0032] The degree of polymerization of the polymer was measured by an Agilent Technologies gel permeation chromatograph PL-GPC 220 using 1,2,4-trichlorobenzene as the eluent solvent at a high temperature of 150 °C, with a standard narrow distribution polystyrene calibration curve.

[0033] In some embodiments, the melt flow rate of the ABS resin is 15 - 45 g / 10 min (220 °C, 10 kg), and the test method reference standard is GB / T3682.1 - 2018.

[0034] In some embodiments, in the PVC / ABS alloy material, the total mass of the PVC resin and ABS is not less than 85%.

[0035] In some embodiments, the filler is at least one of calcium carbonate, talcum powder, barium sulfate, and titanium dioxide.

[0036] In some embodiments, the lubricant is at least one of polyethylene wax, oxidized polyethylene wax, paraffin wax, calcium stearate, and acrylate.

[0037] The production method of the PVC / ABS alloy material of the present invention is not particularly strictly limited and is carried out using a blending device such as a mixer, single-screw or twin-screw extruder. The addition order of the components is not particularly strictly limited, and they can be added simultaneously or in a certain order. Two or more components can be selected from all components for pre-mixing or mixing. For example, the filler can be pre-formed into a masterbatch and then added to the melt of other components in the form of the masterbatch according to a set ratio for extrusion. Under the condition that the mixing capacity of the equipment permits, when molding or producing parts, the masterbatch and the particles formed by other components can also be mixed and melt-processed according to a set ratio. The resin used in the masterbatch can be the PVC resin and ABS resin described in the present invention.

[0038] Specifically, the preparation method of the PVC / ABS alloy material includes the following steps: mixing each component evenly according to a ratio to obtain a premix; adding the premix into a screw extruder for melt extrusion granulation to obtain the PVC / ABS alloy material.

[0039] In some embodiments, the temperature of the melt extrusion granulation is 160 - 180 °C; for example, it can be but is not limited to 160 °C, 165 °C, 170 °C, 175 °C, 180 °C.

[0040] In some embodiments, the rotation speed of the mixing is 300 - 500 rpm.

[0041] In a third aspect, applications of the described PVC / ABS alloy material in the fields of electronic and electrical engineering, security, and household appliances are provided, such as electric control boxes, socket strips, wall switches, smoke alarms, etc.

[0042] Compared with the prior art, the beneficial effects of the present disclosure are as follows: The PVC / ABS alloy material of the present invention is based on PVC resin and ABS resin, and a heat stabilizer, an antioxidant, and a triazine-based ultraviolet absorber are added. Among them, the maleic acid heat stabilizer in the heat stabilizer can, on the one hand, undergo a D-A addition reaction with the conjugated double bonds generated by the thermal decomposition of the PVC resin to inhibit the yellowing of PVC. On the other hand, the double bond with relatively high reactivity in the maleic acid heat stabilizer can serve as the reaction target of peroxy radicals, consume some of the peroxy radicals generated by oxidation, and play a certain protective role for the double bonds of ABS, thereby improving the aging resistance and discoloration resistance of the PVC / ABS alloy material; the compound of a semi-hindered phenol antioxidant and a phosphite antioxidant is used as an antioxidant to capture peroxy radicals and primary radicals, reduce the generation of quinone coloring groups, and thus play a role in inhibiting the discoloration of the PVC / ABS alloy material; the triazine-based ultraviolet absorber can reduce the direct oxidative damage of ultraviolet rays to double bonds, and further improve the aging resistance and discoloration resistance of the PVC / ABS alloy material. Detailed Embodiments

[0043] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present disclosure more thorough and comprehensive.

[0044] As used herein, the terms:

[0045] "Prepared from..." is synonymous with "comprising". As used herein, the terms "comprising", "including", "having", "containing", or any other variation thereof are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or device containing the listed elements does not necessarily have to be limited to those elements, but may include other elements not explicitly listed or elements inherent to such composition, step, method, article, or device.

[0046] The connecting word "consisting of..." excludes any unstated element, step, or component. If used in a claim, this phrase will make the claim closed, excluding materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of..." appears in a clause of the claim body rather than immediately following the subject, it only limits the elements described in that clause; other elements are not excluded from the claim as a whole.

[0047] When an equivalent, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values and lower preferred values, this should be understood to specifically disclose all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is disclosed individually. For example, when the range "1-5" is disclosed, the described range should be interpreted to include ranges such as "1-4", "1-3", "1-2", "1-2 and 4-5", "1-3 and 5", etc. When a numerical range is described herein, unless otherwise stated, the range is intended to include its end values and all integers and fractions within the range.

[0048] In these examples, unless otherwise specified, the parts and percentages are by mass.

[0049] "Parts by mass" refers to the basic measurement unit representing the mass ratio relationship of multiple components. 1 part can represent any unit mass, such as 1 g or 2.689 g, etc. If we say that the mass of component A is a parts by mass and the mass of component B is b parts by mass, it means the mass ratio of component A to component B is a:b. Or, it means the mass of component A is aK and the mass of component B is bK (K is any number representing a multiple factor). It should not be misunderstood that, different from the number of parts by mass, the sum of the parts by mass of all components is not limited to 100 parts.

[0050] "And / or" is used to indicate that either or both of the stated situations may occur. For example, A and / or B includes (A and B) and (A or B).

[0051] The raw materials used in the examples and comparative examples are described as follows, but are not limited to these materials:

[0052] PVC resin: The degree of polymerization is 500, PVC S-50, Ningbo Formosa Plastics Chemical Industry;

[0053] ABS resin: ABS 745N, Kumho Petrochemical, South Korea;

[0054] Maleic stabilizer 1: Dimethyltin maleate, the maleic acid content is 43%, commercially available;

[0055] Maleic stabilizer 2: Dibutyltin maleate, the maleic acid content is 33%, commercially available;

[0056] Maleic stabilizer 3: Dioctyltin maleate, the maleic acid content is 25%, commercially available;

[0057] Maleic stabilizer 4: Zinc maleate, the maleic acid content is 63.5%, commercially available;

[0058] Antimony pentathiolate: Commercially available;

[0059] Antimony tri(dodecyl mercaptan): commercially available;

[0060] Methyltin mercaptan: commercially available;

[0061] Zinc stearate: commercially available;

[0062] Antioxidant 1: triethylene glycol bis[3-(3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate], 245, BASF;

[0063] Antioxidant 2: tris[2,4-di-tert-butylphenyl]phosphite, antioxidant 168, commercially available;

[0064] Antioxidant 3: 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,2H,5H)-trione, antioxidant 1790, commercially available;

[0065] Antioxidant 4: bis(2,4-di-tert-butylphenol) pentaerythritol diphosphite, antioxidant 626, commercially available;

[0066] Antioxidant 5: pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, antioxidant 1010, commercially available;

[0067] Antioxidant 6: tris(nonylphenyl)phosphite, Antioxidant 1178, Changchun, Taiwan, China;

[0068] Anti-ultraviolet agent 1: triazine ultraviolet absorber, 2,4-bis[2-hydroxy-4-butoxyphenyl]-6-(2,4-dibutoxyphenyl)-1,3,5-triazine, Chiguard 460, Qitai Chemical;

[0069] Anti-ultraviolet agent 2: triazine ultraviolet absorber, 2,4-bis(2,4-xylyl)-6-(2-hydroxy-4-n-octyloxyphenyl)-1,3,5-triazine, Chiguard 1064, Qitai Chemical;

[0070] Anti-ultraviolet agent 3: 2-hydroxy-4-octyloxybenzophenone, RIASORB UV-531, Tianjin Li'anlong;

[0071] Anti-ultraviolet agent 4: 2-(2ˊ-hydroxy-5ˊ-methylphenyl)benzotriazole, RIASORB UV-P, Tianjin Li'anlong;

[0072] Lubricant: a compound of oxidized polyethylene wax and polyethylene wax in a mass ratio of 1:1, wherein the oxidized polyethylene wax and polyethylene wax are both commercially available;

[0073] Filler: A compound mixture of titanium dioxide and calcium carbonate with a mass ratio of 2:1. Both titanium dioxide and calcium carbonate are commercially available.

[0074] Examples and Comparative Examples

[0075] The components and weight parts of the PVC / ABS alloy materials in the examples and comparative examples are selected as shown in Table 1 and Table 2. Among them, the preparation method of the PVC / ABS alloy materials in the examples and comparative examples includes the following steps:

[0076] Add each component into a high-speed mixer according to the ratios in Table 1 and Table 2, and mix at a temperature of 90 °C for 10 min to obtain a premix.

[0077] Add the premix into a twin-screw extruder for melt extrusion granulation to obtain the PVC / ABS alloy material. Among them, when performing melt extrusion granulation, the temperature of each section of the twin-screw extruder is 160 - 180 °C.

[0078] Table 1

[0079]

[0080]

[0081] Table 2

[0082]

[0083]

[0084] Performance Testing

[0085] Perform performance testing on the PVC / ABS alloy materials obtained in the examples and comparative examples. The testing method is as follows:

[0086] Inject the PVC / ABS alloy material into a standard spline according to the test standard ASTM D256, and test the notched impact strength of the standard spline, which is recorded as the initial notched impact strength.

[0087] (1) Retention rate of notched impact strength after thermal-oxidative aging (%): According to the test standard GB / T 7141-2008, age the standard spline in a high-temperature oven at 120 °C for 2000 h, cool it naturally, let it stand for 48 h, and then test the notched impact strength of the standard spline after thermal-oxidative aging according to ASTM D256. The ratio of the notched impact strength of the standard spline after thermal-oxidative aging to the initial notched impact strength is the retention rate of notched impact strength after thermal-oxidative aging.

[0088] (2) Retention rate of notched impact strength after UVA aging (%): According to the test standard ISO 4892-3, standard specimens are subjected to UVA ultraviolet aging, with the conditions: UVA340, method A, cycle 1, 1000 h; after aging, let it stand for 48 h, and then according to ASTM D256, test the notched impact strength of the standard specimens after UVA aging. The ratio of the notched impact strength of the standard specimens after UVA aging to the initial notched impact strength is the retention rate of notched impact strength after UVA aging.

[0089] (3) Color difference ΔE after UVA aging: Inject the PVC / ABS alloy material into a standard color plate, denoted as the initial color plate, and then according to the test standard ISO 4892-3, subject the standard specimens to UVA ultraviolet aging, with the conditions: UVA340, method A, cycle 1, 1000 h; after aging, let it stand for 48 h, use the initial color plate as the standard sample, and use a color difference meter to test the color difference of the standard color plate after UVA aging, which is the color difference ΔE after UVA aging. The test results are shown in Table 3.

[0090] Table 3

[0091]

[0092]

[0093] From the experimental data in Table 1, it can be seen that for the PVC / ABS alloy material of the present invention, the retention rate of notched impact strength after thermal-oxidative aging ≥ 85%, the retention rate of notched impact strength after UVA aging ≥ 80%, and the color difference ΔE after UVA aging ≤ 7, indicating that the PVC / ABS alloy material of the present invention has good heat aging resistance and light aging resistance.

[0094] From Examples 2 and 4-6, it can be seen that when the maleic acid content in the maleic acid stabilizer is 25-43%, the retention rate of notched impact strength after thermal-oxidative aging of the obtained PVC / ABS alloy material ≥ 87%, the retention rate of notched impact strength after UVA aging ≥ 83%, and the color difference ΔE after UVA aging ≤ 5.7, indicating that when the maleic acid content in the maleic acid stabilizer is 25-43%, the PVC / ABS alloy material has better heat aging resistance and light aging resistance.

[0095] From Examples 2 and 7-10, it can be seen that when the mass ratio of the maleic acid stabilizer to the first stabilizer is 1:1 - 1:3, the retention rate of notched impact strength after thermal-oxidative aging of the obtained PVC / ABS alloy material ≥ 91%, the retention rate of notched impact strength after UVA aging ≥ 85%, and the color difference ΔE after UVA aging ≤ 5.1, indicating that when the mass ratio of the maleic acid stabilizer to other stabilizers is 1:1 - 1:3, the PVC / ABS alloy material has better heat aging resistance and light aging resistance.

[0096] As can be seen from Example 2, Example 11 and Comparative Examples 10-11, the retention rate of notched impact strength after thermal-oxidative aging of the PVC / ABS alloy material prepared with triazine ultraviolet stabilizers is ≥89%, the retention rate of notched impact strength after UVA aging is ≥80%, and the color difference ΔE after UVA aging is ≤7, indicating that the PVC / ABS alloy material prepared with triazine ultraviolet stabilizers has better heat-aging resistance and light-aging resistance.

[0097] As can be seen from Example 2 and Examples 15-17, when the heat stabilizer is a complex of dimethyltin maleate and / or dibutyltin maleate and / or dioctyltin maleate and antimony pentathiolate, the retention rate of notched impact strength after thermal-oxidative aging of the obtained PVC / ABS alloy material is ≥89%, the retention rate of notched impact strength after UVA aging is ≥85%, and the color difference ΔE after UVA aging is ≤5.1, indicating that when the heat stabilizer is a complex of dimethyltin maleate and / or dibutyltin maleate and / or dioctyltin maleate and antimony pentathiolate, the PVC / ABS alloy material has better heat-aging resistance and light-aging resistance.

[0098] As can be seen from Example 2 and Comparative Examples 1-9, when at least one of the heat stabilizer, antioxidant, and triazine ultraviolet stabilizer is missing, or other types of antioxidants are used to replace the antioxidant of the present invention, the retention rate of notched impact strength after thermal-oxidative aging of the obtained PVC / ABS alloy material is ≤72%, the retention rate of notched impact strength after UVA aging is ≤65%, and the color difference ΔE after UVA aging is ≥10, indicating that only by compounding and using the heat stabilizer, antioxidant, and triazine ultraviolet stabilizer of the present invention can a PVC / ABS alloy material with good light-aging resistance and heat-aging resistance be obtained.

[0099] Finally, it should be noted that the above examples are used to illustrate the technical solutions of the present disclosure rather than to limit the protection scope of the present disclosure. Although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present disclosure.

Claims

1. A PVC / ABS alloy material, characterized in that: The invention comprises the following components in parts by weight: 30-60 parts of PVC resin, 30-60 parts of ABS resin, 2-4 parts of heat stabilizer, 0.5-1.5 parts of antioxidant, 0.3-0.5 parts of triazine anti-ultraviolet agent, 0-5 parts of lubricant and 0-10 parts of filler; The heat stabilizer is a compound of a maleic acid stabilizer and other stabilizers; and the antioxidant is a compound of a semi-hindered phenol antioxidant and a phosphite antioxidant.

2. The PVC / ABS alloy material according to claim 1, characterized in that: The maleic acid content of the maleic acid stabilizer is 20-65%.

3. The PVC / ABS alloy material according to claim 1, characterized in that: The maleic acid stabilizer is at least one of alkyl tin maleate, calcium maleate, zinc maleate, and antimony maleate; preferably, the alkyl tin maleate is at least one of dimethyl tin maleate, dibutyl tin maleate, and dioctyl tin maleate.

4. The PVC / ABS alloy material according to claim 1, characterized in that: The other stabilizer is at least one of an organic antimony stabilizer, a calcium zinc stabilizer, and an organic tin stabilizer other than alkyl tin maleate; preferably, the other stabilizer is at least one of tri(dodecyl mercaptan) antimony, pentathiolate antimony, zinc stearate, and methyl tin mercaptan.

5. The PVC / ABS alloy material according to claim 1, characterized in that: The heat stabilizer is a compound of dimethyltin maleate and / or dibutyltin maleate and / or dioctyltin maleate and antimony pentathiolate.

6. The PVC / ABS alloy material according to claim 1, characterized in that: The mass ratio of the maleic acid stabilizer to the other stabilizer is 1:(0.1-10); preferably, the mass ratio of the maleic acid stabilizer to the other stabilizer is 1:(0.5-3); And / or, the mass ratio of the semi-hindered phenol antioxidant to the phosphite antioxidant is 1:(0.1-5); preferably, the mass ratio of the semi-hindered phenol antioxidant to the phosphite antioxidant is 1:(0.3-1.5).

7. The PVC / ABS alloy material according to claim 1, characterized in that: The semi-hindered phenol antioxidant is at least one of triethylene glycol bis[3-(3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate] and 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione; the phosphite antioxidant is at least one of tris[2,4-di-tert-butylphenyl] phosphite and bis(2,4-di-tert-butylphenol) pentaerythritol diphosphite.

8. The PVC / ABS alloy material according to claim 1, characterized in that: The degree of polymerization of the PVC resin is 400-700; And / or, the filler is at least one of calcium carbonate, talc, barium sulfate and titanium dioxide; And / or, the lubricant is at least one of polyethylene wax, oxidized polyethylene wax, paraffin, calcium stearate, and acrylate.

9. A method for preparing the PVC / ABS alloy material according to any one of claims 1 to 8, characterized in that: The following steps are involved: The components are mixed uniformly according to a proportion to obtain a premix; the premix is ​​added into a screw extruder for melt extrusion granulation to obtain a PVC / ABS alloy material.

10. Application of the PVC / ABS alloy material according to any one of claims 1 to 8 in the fields of electronics and electrical engineering, security and household appliances.

Images