CN101712793A - 一种耐低温型环保阻燃pc/pet合金及其制备方法 - Google Patents
一种耐低温型环保阻燃pc/pet合金及其制备方法 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
- B29C48/9185—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling in the direction of the stream of the material
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- B29C2948/00—Indexing scheme relating to extrusion moulding
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- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C2948/00—Indexing scheme relating to extrusion moulding
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- B29C2948/92857—Extrusion unit
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- B29C2948/00—Indexing scheme relating to extrusion moulding
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Abstract
本发明提供一种耐低温型环保阻燃PC/PET合金及其制备方法,该合金由PC、PET、相容剂、增韧剂、磷系燃剂、协效阻燃剂、低温改良剂、抗氧剂组分通过干燥、搅拌、在双螺杆挤出机中熔融挤出造粒制备而成。本发明耐低温型环保阻燃PC/PET合金具有优异的耐低温性能、冲击强及热变形温度高、阻燃性能、力学性能及尺寸稳定性好的特点,可广泛应用于家电、电子电器、建材、汽车等领域。
Description
技术领域
本发明涉及高分子材料技术领域,具体涉及一种耐低温型环保阻燃PC/PET合金的制备方法。
背景技术
PC/PET合金可以克服PC材料的熔体粘度高、成型加工难、不耐油和溶剂等缺点,是一款性能优异的合金材料。目前国内对PC/PET复合材料研究不多,尤其关于耐低温型阻燃PC/PET复合材料几乎没有。如,中国专利《一种PC/PET合金及其制备方法》,专利申请号:200710074569.2,报道了一种PC/PET复合材料的制备方法;中国专利《一种PC/PET合金及其制备方法》,专利申请号:200710019829.6,报道一种PC/PET合金片材的制备方法。以上两发明均没有涉及到PC/PET复合材料的阻燃性研究。中国专利《一种无卤阻燃PC/PET复合材料及其制备方法》,专利申请号:200910130822.0,报道了一种环保阻燃PC/PET复合材料的制备方法,该材料虽能实现环保阻燃,但在低温下复合材料的力学强度大大降低,不能满足低温环境下的使用要求。因此,如何通过配方设计制备出可以在低温环境下使用的、力学强度优良的环保阻燃PC/PET合金,以替代PC或PC/ABS用于对耐低温性、阻燃性、耐油耐溶剂性、耐热性较高的领域,将具有重要的实际应用价值,相关途径还未见报道。
发明内容
本发明的目的是针对现有技术的不足而提供一种制备容易、低成本、耐低温性好、阻燃性好、耐油耐溶剂好、耐热性佳、力学性能优异的耐低温型环保阻燃PC/PET合金及其制备方法。
本发明的上述目的可以通过以下技术方案实现:
一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:包括如下步骤,
(1)将PC、PET树脂于110℃-120℃鼓风干燥3-6小时;
(2)将干燥好的PC和PET树脂、相容剂、增韧剂、磷系阻燃剂、协效阻燃剂、低温改良剂、抗氧剂依次加入搅拌机中,在300-500转/分的转速下搅拌混合3-5分钟;
(3)将上述混合物加入双螺杆挤出机中,经熔融挤出造粒即得成品。加工工艺如下:双螺杆挤出机一区温度200-215℃,二区温度220-235℃,三区温度220-235℃,四区温度220-235℃,五区温度200-215℃,六区温度220-240℃,机头温度225-240℃,压力为11-17MPa,螺杆转速为250-400rpm;水槽温度20-40℃;切粒机转速为600-1000rpm;
上述组分按重量百分比为:
(1)PC 55-85%;
(2)PET 9-25%;
(3)相容剂 0-5%;
(4)增韧剂 0-6%;
(5)磷系阻燃剂 5-9%;
(6)协效阻燃剂 0.3-1%;
(7)低温改良剂 0.5-2%;
(8)抗氧剂 0-0.5%。
上述各组分配方比例总和为100%。
所述的PC分子量为20000-30000g/mol。
所述PET的特性粘度为0.6-1.0dl/g。
所述相容剂为乙烯-马来酸酐-缩水甘油酯共聚物、丙烯酸酯-缩水甘油酯-乙烯共聚物、苯乙烯-马来酸酐共聚物、丙烯酸酯类聚合物中的至少一种,如丙烯酸酯-缩水甘油酯-乙烯类相容剂KT-22。
所述的增韧剂为甲基丙烯酸-丁二烯-苯乙烯共聚物、乙烯-丙烯酸酯共聚物、丙烯腈-丙烯酸-苯乙烯共聚物、丙烯腈-丁二烯-苯乙烯共聚物、丙烯腈-乙烯-苯乙烯共聚物中的至少一种,如甲基丙烯酸-丁二烯-苯乙烯类增韧剂罗门哈斯2691。
所述的磷系阻燃剂为无机磷系类阻燃剂、有机磷系类阻燃剂的至少一种,如有机磷系类阻燃剂缩聚芳基磷酸酯PX-200。
所述的协效阻燃剂为为聚四氟乙烯类抗滴落剂、硅氧烷类聚合物的至少一种,如聚四氟乙烯PTFE-66。
所述的低温改良剂为聚硅氧烷共聚物、有机硅氧烷、苯甲基硅酮、硅酮的至少一种,如有机硅氧烷类低温改良剂道康宁MB50-007。
所述的抗氧剂为为酚类抗氧剂、亚磷酸酯类抗氧剂、金属钝化剂中的任一种或两种以上的混合物,如酚类抗氧化剂1010。
本发明所述配方及工艺制得的无卤阻燃PC/PET复合材料采用ASTM标准检测,性能如下:
密度: 1.20-1.24g/cm3
断裂伸长率: >200%
拉伸强度: 50-65MPa
弯曲模量: 2000-2400MPa
23℃悬臂梁缺口冲击强度: 500-750J/m
-30℃悬臂梁缺口冲击强度: 450-690J/m
熔融指数: 20-40g/10min(265℃,2.16Kg)
热变形温度(0.45MPa) >100℃
阻燃性(UL94): V-0,1.5mm
耐油性(花生油48h浸泡) 不变色,不开裂
其有益效果是:常规PC/PET合金具有流动性好、耐溶剂性、耐热性好的特点,然而由于PET的加入,降低了复合材料的阻燃性,同时其低温下力学强度较差,限制了该材料的应用范围。本发明通过磷系阻燃剂和协效阻燃剂的阻燃成炭作用,以及硅橡胶的低温改良,提供一种耐低温型环保阻燃PC/PET合金,可替代PC或PC/ABS用于对环保阻燃材料的耐低温、耐油、耐溶剂、耐热等要求较高的领域。
具体实施方式
实施例1:
下述组分按重量百分比为:
(1)PC 77%;
(2)PET 9%;
(3)相容剂:KT-22 3%;
(4)增韧剂:罗门哈斯2678 4%;
(5)磷系阻燃剂:
缩聚芳基磷酸酯PX-200 5%;
(6)协效阻燃剂:
PTFE-66 0.5%;
(7)低温改良剂:
有机硅氧烷道康宁MB50-007 1%
(8)抗氧化剂:1010 0.5%;
先将PC、PET树脂于110℃鼓风干燥4小时,将干燥好的PC和PET树脂、相容剂、增韧剂、磷系阻燃剂、协效阻燃剂、低温改良剂、抗氧剂依次加入搅拌机中,在500转/分的转速下搅拌混合3分钟。然后将上述混合物加入双螺杆挤出机中,经熔融挤出造粒即得成品。加工工艺如下:双螺杆挤出机一区温度210℃,二区温度230℃,三区温度230℃,四区温度230℃,五区温度200℃,六区温度230℃,机头温度235℃,压力为15MPa,螺杆转速为300rpm;水槽温度40℃;切粒机转速为800rpm;
所得耐低温型环保阻燃PC/PET合金经检测性能如下:
密度: 1.21g/cm3
断裂伸长率: 215%
拉伸强度: 61MPa
弯曲模量: 2300MPa
23℃悬臂梁缺口冲击强度: 710J/m
-30℃悬臂梁缺口冲击强度: 660J/m
熔融指数: 30g/10min(265℃,2.16Kg)
热变形温度(0.45MPa) 105℃
阻燃性(UL94): V-0,1.5mm
耐油性(花生油48h浸泡) 不变色,不开裂。
实施例2:
下述组分按重量百分比为:
(1)PC 67%;
(2)PET 16%;
(3)相容剂:KT-22 4%;
(4)增韧剂:罗门哈斯2691 4%;
(5)磷系阻燃剂:
缩聚芳基磷酸酯PX-200 7%;
(6)协效阻燃剂:
PTFE-66 0.5%;
(7)低温改良剂:
有机硅氧烷道康宁MB50-007 1%
(8)抗氧化剂:1010 0.5%;
先将PC、PET树脂于110℃鼓风干燥4小时,将干燥好的PC和PET树脂、相容剂、增韧剂、磷系阻燃剂、协效阻燃剂、低温改良剂、抗氧剂依次加入搅拌机中,在500转/分的转速下搅拌混合3分钟。然后将上述混合物加入双螺杆挤出机中,经熔融挤出造粒即得成品。加工工艺如下:双螺杆挤出机一区温度210℃,二区温度230℃,三区温度230℃,四区温度230℃,五区温度200℃,六区温度230℃,机头温度235℃,压力为15MPa,螺杆转速为300rpm;水槽温度40℃;切粒机转速为800rpm;
所得耐低温型环保阻燃PC/PET合金经检测性能如下:
密度: 1.22g/cm3
断裂伸长率: 205%
拉伸强度: 57MPa
弯曲模量: 2180MPa
23℃悬臂梁缺口冲击强度: 705J/m
-30℃悬臂梁缺口冲击强度: 655J/m
熔融指数: 32g/10min(265℃,2.16Kg)
热变形温度(0.45MPa) 102℃
阻燃性(UL94): V-0,1.5mm
耐油性(花生油48h浸泡) 不变色,不开裂。
Claims (10)
1.一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:包括如下步骤,
(1)将PC、PET树脂于110℃-120℃鼓风干燥3-6小时;
(2)将干燥好的PC和PET树脂、相容剂、增韧剂、磷系阻燃剂、协效阻燃剂、低温改良剂、抗氧剂依次加入搅拌机中,在300-500转/分的转速下搅拌混合3-5分钟;
(3)将上述混合物加入双螺杆挤出机中,经熔融挤出造粒即得成品;加工工艺如下:双螺杆挤出机一区温度200-215℃,二区温度220-235℃,三区温度220-235℃,四区温度220-235℃,五区温度200-215℃,六区温度220-240℃,机头温度225-240℃,压力为11-17MPa,螺杆转速为250-400rpm,水槽温度20-40℃,切粒机转速为600-1000rpm;
上述组分按重量百分比为:
(1)PC 55-85%;
(2)PET 9-25%;
(3)相容剂 0-5%;
(4)增韧剂 0-6%;
(5)磷系阻燃剂 5-9%
(6)协效阻燃剂 0.3-1%;
(7)低温改良剂 0.5-2%;
(8)抗氧剂 0-0.5%;
上述各组分配方比例总和为100%。
2.根据权利要求1所述的一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:所述的PC分子量为20000-30000g/mol。
3.根据权利要求1所述的一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:所述PET的特性粘度为0.6-1.0dl/g。
4.根据权利要求1所述的一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:所述相容剂为乙烯-马来酸酐-缩水甘油酯共聚物、丙烯酸酯-缩水甘油酯-乙烯共聚物、苯乙烯-马来酸酐共聚物、丙烯酸酯类聚合物中的至少一种。
5.根据权利要求1所述的一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:所述的增韧剂为甲基丙烯酸-丁二烯-苯乙烯共聚物、乙烯-丙烯酸酯共聚物、丙烯腈-丙烯酸-苯乙烯共聚物、丙烯腈-丁二烯-苯乙烯共聚物、丙烯腈-乙烯-苯乙烯共聚物中的至少一种。
6.根据权利要求1所述的一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:所述的磷系阻燃剂为无机磷系类阻燃剂、有机磷系类阻燃剂中的至少一种。
7.根据权利要求1所述的一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:所述的协效阻燃剂为聚四氟乙烯类抗滴落剂、硅氧烷类聚合物中的至少一种。
8.根据权利要求1所述的一种耐低温PC/PET复合材料及其制备方法,其特征在于:所述的低温改良剂为聚硅氧烷共聚物、有机硅氧烷、苯甲基硅酮、硅酮中的至少一种。
9.根据权利要求1所述的一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:所述的抗氧剂为酚类抗氧剂、亚磷酸酯类抗氧剂、金属钝化剂中的任一种或两种以上的混合物。
10.根据权利要求1所述的一种耐低温型环保阻燃PC/PET合金及其制备方法,其特征在于:所述相容剂为丙烯酸酯-缩水甘油酯-乙烯类相容剂KT-22;增韧剂为甲基丙烯酸-丁二烯-苯乙烯类增韧剂罗门哈斯2691;磷系阻燃剂为有机磷系类阻燃剂缩聚芳基磷酸酯PX-200;协效阻燃剂为聚四氟乙烯PTFE-66;低温改良剂为有机硅氧烷类低温改良剂道康宁MB50-007;抗氧剂为酚类抗氧化剂1010。
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