WO2021012896A1 - 一种低温耐磨汽车内饰材料 - Google Patents

一种低温耐磨汽车内饰材料 Download PDF

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WO2021012896A1
WO2021012896A1 PCT/CN2020/098906 CN2020098906W WO2021012896A1 WO 2021012896 A1 WO2021012896 A1 WO 2021012896A1 CN 2020098906 W CN2020098906 W CN 2020098906W WO 2021012896 A1 WO2021012896 A1 WO 2021012896A1
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parts
weight
low
styrene
temperature
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French (fr)
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朱建良
朱伟
曹丽秋
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苏州爱得华塑化有限公司
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/002—Methods
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
    • C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
    • C08F279/04—Vinyl aromatic monomers and nitriles as the only monomers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014—Use of organic additives
    • C08J9/0023—Use of organic additives containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C08J9/0071—Nanosized fillers, i.e. having at least one dimension below 100 nanometers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2451/04—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to rubbers

Definitions

  • the present invention generally relates to the field of automotive materials, and more specifically to a low-temperature wear-resistant automotive interior material.
  • the present invention provides a low-temperature wear-resistant automotive interior material.
  • the material still has good wear resistance when used at minus 40°C.
  • a low-temperature wear-resistant automotive interior material which comprises the following components: PVC resin powder, styrene-butadiene rubber (SBR) grafted styrene-acrylonitrile (SAN), heat stabilizer, Plasticizers, inorganic fillers, colorants, foaming agents, lubricants and flame retardants.
  • the proportion of each component is: 80-100 parts by weight of PVC resin powder, 10-20 parts by weight of styrene-butadiene rubber grafted styrene-acrylonitrile, 6-8 parts by weight of heat stabilizer, 80-100 parts by weight of plasticizer, 10-20 parts by weight of inorganic filler, 6-10 parts by weight of coloring agent, 2-4 parts by weight of foaming agent, 4-6 parts by weight of lubricant, 4-8 parts by weight of flame retardant .
  • styrene-butadiene rubber grafted with styrene-acrylonitrile is prepared by seed emulsion polymerization. Specifically prepared by the following methods:
  • Step 1 preparing seed latex; adding 50-80 parts by weight of SBR composite particles, 1-10 parts by weight of cross-linking agent and 20-60 parts by weight of deionized water into the reactor to prepare cross-linked seed latex;
  • Step 2 preparation of grafted SAN shell layer; continuously adding shell layer mixture to the rubber core prepared in step 1; the shell layer mixture consists of 24-80 parts by weight deionized water, 0.2-3 parts by weight emulsifier, It is composed of 24-54 parts by weight of a blend of arylethylene compound and acrylonitrile and 0.01-0.1 parts by weight of molecular weight regulator, the reaction temperature is 60°C-90°C, and the stirring speed is 100-500RPM.
  • the plasticizer includes one or more of DOS, DPHP or 911P.
  • the blowing agent is azodicarbonamide.
  • the heat stabilizer is a calcium zinc heat stabilizer.
  • the degree of polymerization of PVC resin powder is above 1000, preferably SG-3 with a degree of polymerization of 1300.
  • the inorganic filler is nano calcium carbonate.
  • the lubricant is zinc stearate.
  • the colorant includes one or more of titanium dioxide, permanent yellow, phthalocyanine blue, and iron oxide red.
  • the flame retardant is antimony trioxide and/or aluminum hydroxide.
  • the first temperature is 120-150°C
  • the first time is 10-20 minutes
  • the second temperature is 60-80°C
  • the second time is 30-50 minutes.
  • SBR styrene-butadiene rubber
  • SAN styrene-acrylonitrile
  • Grafting SAN on SBR can improve the compatibility of SBR and PVC matrix, making the material's low-temperature toughness and The abrasion resistance has been significantly improved, which meets the requirements for use at minus 40°C;
  • the core-shell type SBR grafted SAN is prepared by seed emulsion polymerization to improve the ability of the material to absorb impact energy, thereby improving the wear resistance of the material;
  • the preparation method of the present invention adopts a two-stage mixing method of first high temperature and then low temperature, which reduces the volatilization of the plasticizer at high temperature and at the same time allows the raw materials to be uniformly mixed.
  • SBR styrene-butadiene rubber
  • SAN styrene-acrylonitrile
  • Step 1 preparing seed latex; adding 50-80 parts by weight of SBR composite particles, 1-10 parts by weight of cross-linking agent and 20-60 parts by weight of deionized water into the reactor to prepare cross-linked seed latex.
  • Step 2 preparation of grafted SAN shell layer; continuously adding shell layer mixture to the rubber core prepared in step 1; the shell layer mixture consists of 24-80 parts by weight deionized water, 0.2-3 parts by weight emulsifier, It is composed of 24-54 parts by weight of a blend of arylethylene compound and acrylonitrile and 0.01-0.1 parts by weight of molecular weight regulator, the reaction temperature is 60°C-90°C, and the stirring speed is 100-500RPM.
  • SBR styrene-butadiene rubber
  • SAN styrene-acrylonitrile
  • the PVC resin powder, styrene-butadiene rubber grafted styrene-acrylonitrile, DOS, and nano calcium carbonate are added to a high-speed mixer and mixed, and the temperature is raised to 120° C. and mixed for 10 minutes, and then discharged.
  • the above-mentioned mixed materials are put into a twin-screw extruder, extruded and cooled, and then pelletized and packaged.
  • the PVC resin powder, styrene-butadiene rubber grafted styrene-acrylonitrile, DPHP, and nano calcium carbonate are added to a high-speed mixer and mixed, and the temperature is raised to 130°C and mixed for 15 minutes, and then discharged.
  • the above-mentioned mixed materials are put into a twin-screw extruder, extruded and cooled, and then pelletized and packaged.
  • the PVC resin powder, styrene-butadiene rubber grafted styrene-acrylonitrile, 911P, and nano calcium carbonate are added to a high-speed mixer and mixed, and the temperature is raised to 150°C and mixed for 20 minutes, and then discharged.
  • the above-mentioned mixed materials are put into a twin-screw extruder, extruded and cooled, and then pelletized and packaged.
  • the PVC material prepared according to the components and methods disclosed in the present invention meets the requirements of various indicators such as hardness, tensile strength, and elongation at break, and has been tested in the 500-rpm friction test at minus 40 degrees Celsius It is still qualified, and its low temperature performance is significantly improved.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Nanotechnology (AREA)
  • Emergency Medicine (AREA)
  • General Chemical & Material Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

一种低温耐磨汽车内饰材料及其制备方法。该材料包括以下组分：PVC树脂粉、丁苯橡胶（SBR）接枝苯乙烯-丙烯睛（SAN）、热稳定剂、增塑剂、无机填料、着色剂、发泡剂、润滑剂和阻燃剂。通过对材料的组分进行优化，提高了PVC的低温耐磨性，同时提高了其冲击吸收能力，使得材料的低温韧性和耐磨性得到明显改善，其满足在零下40℃的使用需求。

Description

一种低温耐磨汽车内饰材料 技术领域
本发明总体涉及汽车材料领域，并且更具体地涉及一种低温耐磨汽车内饰材料。
背景技术
汽车内饰材料越来越向着高档化发展，手感柔软，耐磨是基本要求，但是，普通PVC材料的柔软性随着温度的变化性能会发生很大改变。在常温下正常使用的材料，在低温状态下，产品会变硬，柔韧性降低，同时使用寿命也降低。通常的做法是添加增塑剂和丁腈橡胶来增加产品的柔韧性，不过在实际使用过程中还是差强人意。因此，仍需研究改善PVC材料低温韧性和耐磨性的方法。
发明内容
针对上述问题，本发明提供一种低温耐磨汽车内饰材料。该材料在零下40℃使用时仍具有良好的耐磨性。
根据本发明的一方面，提供一种低温耐磨汽车内饰材料，该材料包括以下组分：PVC树脂粉、丁苯橡胶(SBR)接枝苯乙烯-丙烯腈(SAN)、热稳定剂、增塑剂、无机填料、着色剂、发泡剂、润滑剂和阻燃剂。
根据本发明的一个实施例，各组分的配比为：PVC树脂粉80-100重量份、丁苯橡胶接枝苯乙烯-丙烯腈10-20重量份、热稳定剂6-8重量份、增塑剂80-100重量份、无机填料10-20重量份、着色剂6-10重量份、发泡剂2-4重量份、润滑剂4-6重量份、阻燃剂4-8重量份。
根据本发明的一个实施例，丁苯橡胶接枝苯乙烯-丙烯腈通过种子乳液 聚合法制得。具体通过以下方法制备：
步骤1，制备种子胶乳；向反应器中加入SBR复合粒子50-80重量份、交联剂1-10重量份和去离子水20-60重量份进行反应制备交联的种子胶乳；
步骤2，接枝SAN壳层的制备；向步骤1制备的橡胶核中连续加入壳层混合液；所述壳层混合液由24-80重量份去离子水、0.2-3重量份乳化剂、24-54重量份芳基乙烯化合物和丙烯腈的共混物、0.01-0.1重量份分子量调节剂构成，反应温度为60℃-90℃，搅拌转速为100-500RPM。
根据本发明的一个实施例，增塑剂包括DOS、DPHP或911P中的一种或多种。
根据本发明的一个实施例，发泡剂为偶氮二甲酰胺。
根据本发明的一个实施例，热稳定剂是钙锌热稳定剂。
根据本发明的一个实施例，PVC树脂粉聚合度在1000以上，优选聚合度为1300的SG-3。
根据本发明的一个实施例，无机填料为纳米碳酸钙。
根据本发明的一个实施例，润滑剂为硬脂酸锌。
根据本发明的一个实施例，着色剂包括钛白粉、永固黄、酞青蓝、氧化铁红中的一种或多种。
根据本发明的一个实施例，阻燃剂为三氧化二锑和/或氢氧化铝。
根据本发明的另一方面，提供一种用于制备上述低温耐磨汽车内饰材料的方法，该方法包括下列步骤：
按配比称取PVC树脂粉、丁苯橡胶接枝苯乙烯-丙烯腈、热稳定剂、增塑剂、无机填料、着色剂、发泡剂、润滑剂和阻燃剂；
将PVC树脂粉、丁苯橡胶接枝苯乙烯-丙烯腈、增塑剂、无机填料加入高速混合机上混合，待混合机的温度升温至第一预定温度并混合第一预定时间后卸料；
转移至低速混合机中并加入剩余的热稳定剂、着色剂、发泡剂、润滑剂和阻燃剂，待混合料降温至第二预定温度并混合第二预定时间后卸料；
将混合好的物料放入挤出机中挤出并进行包装。
根据本发明的一个实施例，第一温度为120-150℃，第一时间为10-20分钟，第二温度为60-80℃，第二时间为30-50分钟。
本发明所公开的低温耐磨汽车内饰材料和方法可以获得以下多种有益效果：
(1)通过对材料的组分进行优化，尤其是采用了丁苯橡胶(SBR)接枝苯乙烯-丙烯腈(SAN)，SBR为玻璃转化温度较低的橡胶弹性体，其具有较好的流动性，能够用于改善PVC树脂的低温韧性；SAN为塑料，与PVC的相容性好，将SAN接枝在SBR上，能够改善SBR与PVC基体的相容性，使得材料的低温韧性和耐磨性得到明显改善，其满足在零下40℃的使用需求；
(2)采用种子乳液聚合法制备核壳型SBR接枝SAN，提高材料吸收冲击能量的能力，进而提高了材料的耐磨性；
(3)本发明的制备方法采用先高温后低温的两段式混料方式，降低了增塑剂在高温的挥发，同时也使得原料能够混合均匀。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合具体实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
实施例1
通过种子乳液聚合法制备丁苯橡胶(SBR)接枝苯乙烯-丙烯腈(SAN)。
步骤1，制备种子胶乳；向反应器中加入SBR复合粒子50-80重量份、交联剂1-10重量份和去离子水20-60重量份进行反应制备交联的种子胶乳。
步骤2，接枝SAN壳层的制备；向步骤1制备的橡胶核中连续加入壳层混合液；所述壳层混合液由24-80重量份去离子水、0.2-3重量份乳化剂、24-54重量份芳基乙烯化合物和丙烯腈的共混物、0.01-0.1重量份分子量调节剂构成，反应温度为60℃-90℃，搅拌转速为100-500RPM。
实施例2
首先按以下配比分别称取：聚合度为1000的PVC树脂粉80重量份、由实施例1制备的丁苯橡胶(SBR)接枝苯乙烯-丙烯腈(SAN)10重量份、钙锌热稳定剂6重量份、DOS 80重量份、纳米碳酸钙10重量份、钛白粉6重量份、偶氮二甲酰胺2重量份、硬脂酸锌4重量份、三氧化二锑4重量份。
将PVC树脂粉、丁苯橡胶接枝苯乙烯-丙烯腈、DOS、纳米碳酸钙加入高速混合机上混合，待温度升高至120℃并混合10分钟后卸料。
转移至低速混合机中，并加入剩余的钙锌热稳定剂、钛白粉、偶氮二甲酰胺、硬脂酸锌、三氧化二锑，低速混合至温度降低至60℃，继续混合50分钟后卸料。
将上述混合好的物料投入双螺杆挤出机，挤出冷却后，进行切粒包装。
实施例3
首先按以下配比分别称取：聚合度为1100的PVC树脂粉90重量份、由实施例1制备的丁苯橡胶(SBR)接枝苯乙烯-丙烯腈(SAN)15重量份、钙锌热稳定剂7重量份、DPHP 90重量份、纳米碳酸钙15重量份、永固黄8重量份、偶氮二甲酰胺3重量份、硬脂酸锌5重量份、氢氧化铝6重量份。
将PVC树脂粉、丁苯橡胶接枝苯乙烯-丙烯腈、DPHP、纳米碳酸钙加入高速混合机上混合，待温度升高至130℃并混合15分钟后卸料。
转移至低速混合机中，并加入剩余的钙锌热稳定剂、永固黄、偶氮二甲酰胺、硬脂酸锌、氢氧化铝，低速混合至温度降低至70℃，继续混合40分钟后卸料。
将上述混合好的物料投入双螺杆挤出机，挤出冷却后，进行切粒包装。
实施例4
首先按以下配比分别称取：聚合度为1300的PVC树脂粉100重量份、由实施例1制备的丁苯橡胶(SBR)接枝苯乙烯-丙烯腈(SAN)20重量份、钙锌热稳定剂8重量份、911P 100重量份、纳米碳酸钙20重量份、酞青蓝10重量份、偶氮二甲酰胺4重量份、硬脂酸锌6重量份、三氧化二锑3重量份、氢氧化铝3重量份。
将PVC树脂粉、丁苯橡胶接枝苯乙烯-丙烯腈、911P、纳米碳酸钙加入高速混合机上混合，待温度升高至150℃并混合20分钟后卸料。
转移至低速混合机中，并加入剩余的钙锌热稳定剂、酞青蓝、偶氮二甲酰胺、硬脂酸锌、三氧化二锑、氢氧化铝，低速混合至温度降低至80℃，继续混合30分钟后卸料。
将上述混合好的物料投入双螺杆挤出机，挤出冷却后，进行切粒包装。
上述实施例的性能测试结果如下：
Figure PCTCN2020098906-appb-000001
由上述测试结果可以看出，按照本发明公开的组分和方法制备的PVC材料满足硬度、拉伸强度、及断裂伸长率等各项指标的要求，并且在零下 40摄氏度500转摩擦测试中依然是合格的，其低温性能显著提高。
以上所述实施例仅表达了本发明的实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。

Claims (10)

  1. 一种低温耐磨汽车内饰材料，其特征在于，所述材料包括以下组分：PVC树脂粉、丁苯橡胶(SBR)接枝苯乙烯-丙烯腈(SAN)、热稳定剂、增塑剂、无机填料、着色剂、发泡剂、润滑剂和阻燃剂。
  2. 根据权利要求1所述的低温耐磨汽车内饰材料，其特征在于，各组分的配比为：PVC树脂粉80-100重量份、丁苯橡胶接枝苯乙烯-丙烯腈10-20重量份、热稳定剂6-8重量份、增塑剂80-100重量份、无机填料10-20重量份、着色剂6-10重量份、发泡剂2-4重量份、润滑剂4-6重量份、阻燃剂4-8重量份。
  3. 根据权利要求1所述的低温耐磨汽车内饰材料，其特征在于，所述丁苯橡胶接枝苯乙烯-丙烯腈通过种子乳液聚合法制得。
  4. 根据权利要求1所述的低温耐磨汽车内饰材料，其特征在于，所述增塑剂包括DOS、DPHP或911P中的一种或多种。
  5. 根据权利要求1所述的低温耐磨汽车内饰材料，其特征在于，所述热稳定剂是钙锌热稳定剂。
  6. 根据权利要求1所述的低温耐磨汽车内饰材料，其特征在于，所述PVC树脂粉聚合度在1000以上。
  7. 根据权利要求1所述的低温耐磨汽车内饰材料，其特征在于，所述阻燃剂为三氧化二锑和/和氢氧化铝。
  8. 根据权利要求1所述的低温耐磨汽车内饰材料，其特征在于，所述着色剂包括钛白粉、永固黄、酞青蓝、氧化铁红中的一种或多种。
  9. 一种用于制备根据权利要求1-8中任一项所述的低温耐磨汽车内饰材料的方法，其特征在于，所述方法包括下列步骤：
    按配比称取PVC树脂粉、丁苯橡胶接枝苯乙烯-丙烯腈、热稳定剂、增塑剂、无机填料、着色剂、发泡剂、润滑剂和阻燃剂；
    将PVC树脂粉、丁苯橡胶接枝苯乙烯-丙烯腈、增塑剂、无机填料加入高 速混合机上混合，待混合机的温度升温至第一预定温度并混合第一预定时间后卸料；
    转移至低速混合机中并加入剩余的热稳定剂、着色剂、发泡剂、润滑剂和阻燃剂，待混合料降温至第二预定温度并混合第二预定时间后卸料；
    将混合好的物料放入挤出机中挤出并进行包装。
  10. 根据权利要求9所述的方法，其特征在于，所述第一预定温度为120-150℃，所述第一预定时间为10-20分钟，所述第二预定温度为60-80℃，所述第二预定时间为30-50分钟。
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