WO2021232514A1 - 一种汽车后视镜外壳材料的制备方法 - Google Patents
一种汽车后视镜外壳材料的制备方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions 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 an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/12—Copolymers of styrene with unsaturated nitriles
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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
- B29B7/005—Methods for mixing in batches
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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
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- the invention relates to a method for preparing an automobile rearview mirror shell material.
- the car rearview mirror shell is used as a shell to protect and support the internal rearview mirror. It needs to have high weather resistance; in addition, the car rearview mirror is exposed to the atmosphere all the year round, wind and sun, and is easily exposed to ultraviolet rays. The shell is aging and cracking; thereby increasing the user's use cost.
- the main purpose of the present invention is to overcome the shortcomings of the prior art, and discloses a method for preparing an automobile rearview mirror housing material, which is characterized in that it includes the following steps:
- raw materials include:
- Weather-resistant additives 0.1-1%
- the high damping elastomer is ethylene-methyl acrylate-glycidyl methacrylate or/and ethylene-butyl acrylate-glycidyl methacrylate.
- the low-temperature modifier is a silicone toughening agent.
- the antioxidant is bis(2.4-di-tert-butylphenyl) pentaerythritol or/and 2,6-di-tert-butyl-4-4 cresol or/and dioctadecyl alcohol pentaerythritol diphosphorous acid ester.
- the compatibilizer is ASA grafted maleic anhydride.
- weather resistance auxiliary agent is benzotriazole or/and benzotriazine.
- the mass ratio of the SAS:PBT is 8:3 to 3:1.
- the double cone dryer is used for pre-mixing first, and then the high-speed mixer is used for mixing.
- the double-cone dryer uses heat-conducting oil for heat conduction.
- the extrudate is cooled by water cooling, and is dried in a blast drying box after pelletizing.
- the invention adds a low-temperature modifier and polycarbonate to toughen by adding a small amount of polycarbonate, which effectively improves the low-temperature impact strength and maintains the original weather resistance and processing performance of the material.
- the addition of PBT and high damping elastomer makes the material have better resistance to environmental cracking and increase the service life.
- ASA has strong weather resistance and can resist degradation, aging and fading caused by ultraviolet radiation.
- the raw materials are stirred at 95-98°C, so that the raw materials can be quickly dispersed and evenly distributed, and the raw materials are dried at the same time.
- the heat-conducting oil-type double-cone dryer is used for pre-mixing, so that the material in the double-cone drying cylinder is heated more evenly.
- Fig. 1 is a flow chart of a method for preparing a housing material for an automobile rearview mirror according to the present invention.
- a method for preparing an automobile rearview mirror housing material includes the following steps:
- raw materials include:
- the high damping elastomer is ethylene-methyl acrylate-glycidyl methacrylate.
- the low-temperature modifier is a silicone toughening agent.
- the antioxidant is bis(2.4-di-tert-butylphenyl)pentaerythritol.
- the compatibilizer is ASA grafted maleic anhydride.
- the weathering aid is benzotriazole.
- a method for preparing an automobile rearview mirror housing material includes the following steps:
- raw materials include:
- the high damping elastomer is ethylene-methyl acrylate-glycidyl methacrylate.
- the low-temperature modifier is a silicone toughening agent.
- the antioxidant is 2,6-di-tert-butyl-4-4 cresol.
- the compatibilizer is ASA grafted maleic anhydride.
- the weathering aid is benzotriazole.
- a method for preparing an automobile rearview mirror housing material includes the following steps:
- raw materials include:
- the high damping elastomer is ethylene-butyl acrylate-glycidyl methacrylate.
- the low-temperature modifier is a silicone toughening agent.
- the antioxidant is dioctadecyl alcohol pentaerythritol diphosphite.
- the compatibilizer is ASA grafted maleic anhydride.
- the weathering aid is benzotriazine.
- a method for preparing an automobile rearview mirror housing material includes the following steps:
- raw materials include:
- the high damping elastomer is ethylene-methyl acrylate-glycidyl methacrylate and ethylene-butyl acrylate-glycidyl methacrylate, and the weight ratio is 1:1.
- the low-temperature modifier is a silicone toughening agent.
- Antioxidants are bis(2.4-di-tert-butylphenyl) pentaerythritol and 2,6-di-tert-butyl-4-4 cresol and dioctadecyl alcohol pentaerythritol diphosphite, and the weight ratio is 1:1 :1.
- the compatibilizer is ASA grafted maleic anhydride.
- the weathering aids are benzotriazole: and benzotriazine, and the weight ratio is 1:1.
- a method for preparing an automobile rearview mirror housing material includes the following steps:
- raw materials include:
- the high damping elastomer is ethylene-methyl acrylate-glycidyl methacrylate and ethylene-butyl acrylate-glycidyl methacrylate, and the weight ratio is 1:1.
- the low-temperature modifier is a silicone toughening agent.
- Antioxidant is bis(2.4-di-tert-butylphenyl) pentaerythritol and 2,6-di-tert-butyl-4-4 cresol and dioctadecyl alcohol pentaerythritol diphosphite, and the weight ratio is 1:1 .
- the compatibilizer is ASA grafted maleic anhydride.
- the weathering aids are benzotriazole and benzotriazine, and the weight ratio is 1:1.
- the material of the present invention has good low-temperature impact strength and strong UV aging resistance. While ensuring strong weather resistance, it also improves environmental cracking resistance and cold resistance. It is especially suitable for car rearview mirrors that are exposed to the atmosphere all the year round. In, greatly improve its service life.
- the invention adds a low-temperature modifier and polycarbonate to toughen by adding a small amount of polycarbonate, which effectively improves the low-temperature impact strength and maintains the original weather resistance and processing performance of the material.
- Squeeze in PBT and high-damping elastomer so that the material has better resistance to environmental cracking and improves service life.
- ASA has strong weather resistance and can resist degradation, aging and fading caused by ultraviolet radiation.
- the raw materials are stirred at 95-98°C, so that the raw materials can be quickly dispersed and evenly distributed, and the raw materials are dried at the same time.
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
本发明公开了一种汽车后视镜外壳材料的制备方法,其原料包括SAN树脂:30-40%;SAS:20-30%;PBT:8-10%;聚碳酸酯:5-10%;高阻尼弹性体:9-10%;低温改性剂:7-10%;抗氧剂:0.1-1%;相容剂:4-8%;耐候助剂:0.1-1%;本发明添加低温改性剂和聚碳酸酯,通过添加少量聚碳酸酯进行增韧,有效提高了低温冲击强度,并且保持材料原有的耐候性以及加工性能。加入PBT和高阻尼弹性体,使得材料具有较好的耐环境开裂性能,提高使用寿命。另外,ASA具有很强的耐候性,能够抵抗紫外线照射引起的降解、老化、褪色。对原料在95-98℃下进行搅拌,使得原料之间能够快速的分散均匀,同时对原料进行干燥。采用导热油型双锥干燥机进行预混合,使得双锥干燥筒内的物料受热更加均匀。
Description
本发明涉及一种汽车后视镜外壳材料的制备方法。
汽车后视镜外壳作为保护和支撑内部后视镜的壳体,其需要有较高的耐候性;另外,汽车后视镜常年暴露在大气中,风吹日晒,容易受到紫外线使得后视镜壳体老化开裂;进而增加用户的使用成本。
发明内容
针对以上现有技术存在的缺陷,本发明的主要目的在于克服现有技术的不足之处,公开了一种汽车后视镜外壳材料的制备方法,其特征在于,包括以下步骤:
S1,按质量分数准备原料;原料包括:
SAN树脂 30-40%;
SAS 20-30%;
PBT 8-10%;
聚碳酸酯 5-10%;
高阻尼弹性体 9-10%;
低温改性剂 7-10%;
抗氧剂 0.1-1%;
相容剂 4-8%;
耐候助剂 0.1-1%;
S2,将原料进行充分混合,并且环境温度为95-98℃;
S3,将混合后的原料通过双螺杆挤出机挤出,得到挤出料,并对挤出料进行冷却、切粒存储。
进一步地,所述高阻尼弹性体为乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯或/和乙烯-丙烯酸丁酯-甲基丙烯酸缩水甘油酯。
进一步地,所述低温改性剂为有机硅增韧剂。
进一步地,所述抗氧化剂为双(2.4-二叔丁基苯基)季戊四醇或/和2,6-二叔丁基-4-4甲酚或/和双十八烷基醇季戊四醇二亚磷酸酯。
进一步地,所述相容剂为ASA接枝马来酸酐。
进一步地,所述耐候助剂为苯并三唑或/和苯并三嗪。
进一步地,所述SAS:PBT的质量比为8:3~3:1。
进一步地,S2中,先采用双锥干燥机中进行预混合,而后通过高速混合机进行混合。
进一步地,双锥干燥机采用导热油进行导热。
进一步地,S3中,挤出料采用水冷的方式进行冷却,并在切粒后通过鼓风干燥箱进行干燥。
本发明取得的有益效果:
本发明添加低温改性剂和聚碳酸酯,通过添加少量聚碳酸酯进行增韧,有效提高了低温冲击强度,并且保持材料原有的耐候性以及加工性能。加入PBT和高阻尼弹性体,使得材料具有较好的耐环境开裂性能,提高使用寿命。另外,ASA具有很强的耐候性,能够抵抗紫外线照射引起的降解、老化、褪色。对原料在95-98℃下进行搅拌,使得原料之间能够快速的分散均匀,同时对原料进行干燥。采用导热油型双锥干燥机进行预混合,使得双锥干燥筒内的物料受热更加均匀。
图1为本发明的一种汽车后视镜外壳材料的制备方法的流程图。
为了使本发明的目的、技术方案及优点更加清楚明白,下面结合附图及实施例对本发明作进一步详细说明。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
一种汽车后视镜外壳材料的制备方法,包括以下步骤:
S1,按质量分数准备原料;原料包括:
SAN树脂 36.8%;
SAS 20-30%;
PBT 8%;
聚碳酸酯 5%;
高阻尼弹性体 9%;
低温改性剂 7%;
抗氧剂 0.1%;
相容剂 4%;
耐候助剂 0.1%;
S2,将原料投放入导热油加热的双锥干燥机中进行预混合,筒内温度95℃,混合时间20分钟,而后再通过高速混合机混合10分钟;其中,双锥干燥机使用导热油传导热量,使得双锥干燥筒内均匀受热,并且通过双锥干燥筒不断的翻转,同时吸走蒸发出来的水汽,得到干燥并且混合均匀的原料。
S3,将混合后的原料通过双螺杆挤出机挤出,得到挤出料,将挤出料浸入水中进行冷却、切粒,最后通过鼓风干燥箱对颗粒进行干燥,然后存储。
其中,高阻尼弹性体为乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯。低温改性剂为有机硅增韧剂。抗氧化剂为双(2.4-二叔丁基苯基)季戊四醇。相容剂为ASA接枝马来酸酐。耐候助剂为苯并三唑。
实施例2
一种汽车后视镜外壳材料的制备方法,包括以下步骤:
S1,按质量分数准备原料;原料包括:
SAN树脂 40%;
SAS 20.6%;
PBT 9%;
聚碳酸酯 7%;
高阻尼弹性体 9%;
低温改性剂 8%;
抗氧剂 0.2%;
相容剂 6%;
耐候助剂 0.2%;
S2,将原料投放入导热油加热的双锥干燥机中进行预混合,筒内温度95℃,混合时间20分钟,而后再通过高速混合机混合10分钟;
S3,将混合后的原料通过双螺杆挤出机挤出,得到挤出料,将挤出料浸入水中进行冷却、切粒,最后通过鼓风干燥箱对颗粒进行干燥,然后存储。
其中,高阻尼弹性体为乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯。低温改性剂为有机硅增韧剂。抗氧化剂为2,6-二叔丁基-4-4甲酚。相容剂为ASA接枝马来酸酐。耐候助剂为苯并三唑。
实施例3
一种汽车后视镜外壳材料的制备方法,包括以下步骤:
S1,按质量分数准备原料;原料包括:
SAN树脂 30%;
SAS 28.5%;
PBT 9%;
聚碳酸酯 8%;
高阻尼弹性体 9.5%;
低温改性剂 8%;
抗氧剂 0.5%;
相容剂 6%;
耐候助剂 0.5%;
S2,将原料投放入导热油加热的双锥干燥机中进行预混合,筒内温度95℃,混合时间20分钟,而后再通过高速混合机混合10分钟;
S3,将混合后的原料通过双螺杆挤出机挤出,得到挤出料,将挤出料浸入水中进行冷却、切粒,最后通过鼓风干燥箱对颗粒进行干燥,然后存储。
其中,高阻尼弹性体为乙烯-丙烯酸丁酯-甲基丙烯酸缩水甘油酯。低温改性剂为有机硅增韧剂。抗氧化剂为双十八烷基醇季戊四醇二亚磷酸酯。相容剂为ASA接枝马来酸酐。耐候助剂为苯并三嗪。
实施例4
一种汽车后视镜外壳材料的制备方法,包括以下步骤:
S1,按质量分数准备原料;原料包括:
SAN树脂 30%;
SAS 21.4%;
PBT 10%;
聚碳酸酯 9%;
高阻尼弹性体 10%;
低温改性剂 10%;
抗氧剂 0.8%;
相容剂 8%;
耐候助剂 0.8%;
S2,将原料投放入导热油加热的双锥干燥机中进行预混合,筒内温度95℃,混合时间20分钟,而后再通过高速混合机混合10分钟;
S3,将混合后的原料通过双螺杆挤出机挤出,得到挤出料,将挤出料浸入水中进行冷却、切粒,最后通过鼓风干燥箱对颗粒进行干燥,然后存储。
其中,高阻尼弹性体为乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯和乙烯-丙烯酸丁酯-甲基丙烯酸缩水甘油酯,且重量比为1:1。低温改性剂为有机硅增韧剂。抗氧化剂为双(2.4-二叔丁基苯基)季戊四醇和2,6-二叔丁基-4-4甲酚和双十八烷基醇季戊四醇二亚磷酸酯,且重量比为1:1:1。相容剂为ASA接枝马来酸酐。耐候助剂为苯并三唑:和苯并三嗪,且重量比为1:1。
实施例5
一种汽车后视镜外壳材料的制备方法,包括以下步骤:
S1,按质量分数准备原料;原料包括:
SAN树脂 32%;
SAS 20%;
PBT 10%;
聚碳酸酯 10%;
高阻尼弹性体 10%;
低温改性剂 8%;
抗氧剂 1%;
相容剂 8%;
耐候助剂 1%;
S2,将原料投放入导热油加热的双锥干燥机中进行预混合,筒内温度95℃,混合时间20分钟,而后再通过高速混合机混合10分钟;
S3,将混合后的原料通过双螺杆挤出机挤出,得到挤出料,将挤出料浸入水中进行冷却、切粒,最后通过鼓风干燥箱对颗粒进行干燥,然后存储。
其中,高阻尼弹性体为乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯和乙烯-丙烯酸丁酯-甲基丙烯酸缩水甘油酯,且重量比为1:1。低温改性剂为有机硅增韧剂。抗氧化剂为双(2.4-二叔丁基苯基)季戊四醇和2,6-二叔丁基-4-4甲酚和双十八烷基醇季戊四醇二亚磷酸酯,且重量比为1:1。相容剂为ASA接枝马来酸酐。耐候助剂为苯并三唑和苯并三嗪,且重量比为1:1。
实施例1-5的测试结果如表1所示。
表1
基于上述,本发明的材料低温冲击强度好,抗紫外老化能力强,在保证很强耐候性的同时,提高耐环境开裂性能和抗寒性能,特别适用于汽车后视镜这种常年暴露在大气中,大大提高了其使用寿命。
本发明添加低温改性剂和聚碳酸酯,通过添加少量聚碳酸酯进行增韧,有效提高了低温冲击强度,并且保持材料原有的耐候性以及加工性能。挤入PBT和高阻尼弹性体,使得材料具有较好的耐环境开裂性能,提高使用寿命。另外,ASA具有很强的耐候性,能够抵抗紫外线照射引起的降解、老化、褪色。对原料在95-98℃下进行搅拌,使得原料之间能够快速的分散均匀,同时对原料进行干燥。
以上仅为本发明的较佳实施例,并非用来限定本发明的实施范围;如果不脱离本发明的精神和范围,对本发明进行修改或者等同替换,均应涵盖在本发明权利要求的保护范围当中。
Claims (10)
- 根据权利要求1所述的一种汽车后视镜外壳材料的制备方法,其特征在于,所述高阻尼弹性体为乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯或/和乙烯-丙烯酸丁酯-甲基丙烯酸缩水甘油酯。
- 根据权利要求1所述的一种汽车后视镜外壳材料的制备方法,其特征在于,所述低温改性剂为有机硅增韧剂。
- 根据权利要求1所述的一种汽车后视镜外壳材料的制备方法,其特征在于,所述抗氧化剂为双(2.4-二叔丁基苯基)季戊四醇或/和2,6-二叔丁基-4-4甲酚或/和双十八烷基醇季戊四醇二亚磷酸酯。
- 根据权利要求1所述的一种汽车后视镜外壳材料的制备方法,其特征在于,所述相容剂为ASA接枝马来酸酐。
- 根据权利要求1所述的一种汽车后视镜外壳材料的制备方法,其特征在于,所述耐候助剂为苯并三唑或/和苯并三嗪。
- 根据权利要求1所述的一种汽车后视镜外壳材料的制备方法,其特征在于,所述SAS:PBT的质量比为8:3~3:1。
- 根据权利要求1所述的一种汽车后视镜外壳材料的制备方法,其特征在于,S2中,先采用双锥干燥机中进行预混合,而后通过高速混合机进行混合。
- 根据权利要求8所述的一种汽车后视镜外壳材料的制备方法,其特征在于,双锥干燥机采用导热油进行导热。
- 根据权利要求1所述的一种汽车后视镜外壳材料的制备方法,其特征在于,S3中,挤出料采用水冷的方式进行冷却,并在切粒后通过鼓风干燥箱进行干燥。
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