CN107698900A - 一种低烟无卤阻燃高强度薄壁绝缘料 - Google Patents
一种低烟无卤阻燃高强度薄壁绝缘料 Download PDFInfo
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Abstract
本发明公开了一种低烟无卤阻燃高强度薄壁绝缘料,其特征在于,将功能填料晶须鼓风干燥后滴加六甲基二硅氮烷和二月桂酸二丁基锡,升温回流冷凝反应,得表面接枝改性晶须;将氢氧化镁研磨过筛后烘干,加表面处理剂高速搅拌,与红磷母料混合得复配填料;将三氧化二锑、硼酸锌加入增塑剂中,搅拌成糊状浆料,机械研磨;向高速混合机中通入蒸汽加热,投入PVC树脂,加入所得研磨好的浆料,低速搅拌加环氧大豆油和四溴苯酐酯,当料温升至70‑80℃,高速搅拌加入前面所得改性填料及助剂,当料温为110‑120℃时低速搅拌,当料温降至40‑50℃时出料;将捏合好的物料投入双螺杆挤出机料斗中,挤出造粒,得到所述高强度绝缘料。
Description
技术领域
本发明涉及绝缘料领域,具体涉及一种低烟无卤阻燃高强度薄壁绝缘料。
背景技术
用于电线电缆的绝缘料和护套料大都是有机聚合物,在一定的温度和氧气浓度下会引发燃烧。在电缆给社会提供便利的同时也带来了火灾的风险,电缆因为自身和外在的原因被点燃,就有可能延着电缆铺设的方向从建筑物内到外蔓延,再点燃其他可燃物,引起更大的火灾,同时电缆在燃烧时还会产生各种有毒的烟雾,造成生物财产的损失。为减少火灾隐患,对电线电缆所用的聚合物进行阻燃处理是十分必要的。目前,工业上阻燃聚烯烃电缆料主要是通过添加卤素或金属氢氧化物等阻燃剂制备的。
发明内容
本发明主要解决的技术问题是提供一种低烟无卤阻燃高强度薄壁绝缘料,依照该方法制备的绝缘料阻燃性能好、强度高。
本发明所要解决的技术问题采用以下的技术方案来实现:
一种低烟无卤阻燃高强度薄壁绝缘料,其特征在于,按以下步骤进行:
(1)功能填料晶须的表面处理工艺:
将6-7份晶须在145-150℃鼓风干燥箱中干燥1-2h,机械搅拌下滴加0.5-1份六甲基二硅氮烷和1滴二月桂酸二丁基锡,升温至195-200℃回流冷凝反应1-2h,降至室温,得到表面接枝改性的晶须;
(2)氢氧化镁的表面处理:
将15-20份氢氧化镁研磨过60目筛,在105-110℃下烘2-3h,加入1-2份表面处理剂,用搅拌机高速搅拌10-15min,在105-110℃下烘1-2h,然后与5-10份红磷母料混合,得到复配填料;
(3)阻燃剂的预处理:
将4-6份三氧化二锑、3-5份硼酸锌加入30-32份增塑剂中,搅拌成糊状浆料,用研磨机研磨2-4遍后,持续搅拌;
(4)高强度绝缘料的捏合与造粒工艺:
捏合:向高速混合机中通入0.2MP的蒸汽进行加热,投入100-110份PVC树脂,加入(3)中所得研磨好的浆料,低速搅拌加入3-5份环氧大豆油和8-10份四溴苯酐酯,当料温升至70-80℃,高速搅拌加入(1)(2)中所得改性填料及4-5份助剂,当料温为110-120℃时低速搅拌,当料温降至40-50℃时出料;
造粒:将上述所得捏合好的物料投入双螺杆挤出机料斗中,挤出造粒,得到所述高强度绝缘料。
其中,步骤(1)中晶须为碱式硫酸镁晶须、硼酸镁晶须中的一种或两种任意比例的混合。步骤(2)中表面处理剂为硅烷类偶联剂A151或钛酸酯类偶联剂JN201,红磷母料为RPM650。步骤(3)中增塑剂为DOTP。步骤(4)中助剂为钙锌稳定剂,上阶双螺杆加工温度为150-165℃,下阶单螺杆温度为140-155℃。
本发明的反应机理及有益效果如下:
用六甲基二硅氮烷对晶须进行有效的表面改性处理,晶须表面产生了有机功能基团,更容易混炼,可提高复合材料的拉伸强度,对材料的力学增强效果明显;氢氧化镁经偶联剂处理后能提高复合体系的断裂伸长率,与红磷母料配合使用,可提高体系的阻燃性能、改善力学性能;以三氧化二锑、硼酸锌为阻燃剂、四溴苯酐酯为阻燃增塑剂,三氧化二锑对氧指数的贡献显著,硼酸锌作为协效阻燃剂起作用、抑制发烟效果好,四溴苯酐酯可提高材料的硬度和氧指数;用改性氢氧化镁复配红磷母料填充PVC,加入改性功能填料晶须,捏合后经双螺杆挤出机挤出造粒,采用风冷磨面热切粒方式,粒料经旋风分离器、振动筛进入料仓,得到低烟无卤阻燃高强度薄壁绝缘料。
具体实施方式
为了使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解,下面结合具体实施例,进一步阐述本发明。
实施例
一种低烟无卤阻燃高强度薄壁绝缘料,其特征在于,按以下步骤进行:
(1)功能填料晶须的表面处理工艺:
将6kg晶须在145-150℃鼓风干燥箱中干燥1h,机械搅拌下滴加0.5kg六甲基二硅氮烷和1滴二月桂酸二丁基锡,升温至195-200℃回流冷凝反应2h,降至室温,得到表面接枝改性的晶须;
(2)氢氧化镁的表面处理:
将15kg氢氧化镁研磨过60目筛,在105-110℃下烘2h,加入1kg表面处理剂,用搅拌机高速搅拌15min,在105-110℃下烘1h,然后与5kg红磷母料混合,得到复配填料;
(3)阻燃剂的预处理:
将4kg三氧化二锑、3kg硼酸锌加入30kg增塑剂中,搅拌成糊状浆料,用研磨机研磨4遍后,持续搅拌;
(4)高强度绝缘料的捏合与造粒工艺:
捏合:向高速混合机中通入0.2MP的蒸汽进行加热,投入110kg PVC树脂,加入(3)中所得研磨好的浆料,低速搅拌加入3kg环氧大豆油和8kg四溴苯酐酯,当料温升至70-80℃,高速搅拌加入(1)(2)中所得改性填料及4kg助剂,当料温为110-120℃时低速搅拌,当料温降至40-50℃时出料;
造粒:将上述所得捏合好的物料投入双螺杆挤出机料斗中,挤出造粒,得到所述高强度绝缘料。
其中,步骤(1)中晶须为碱式硫酸镁晶须、硼酸镁晶须中的一种或两种任意比例的混合。步骤(2)中表面处理剂为硅烷类偶联剂A151或钛酸酯类偶联剂JN201,红磷母料为RPM650。步骤(3)中增塑剂为DOTP。步骤(4)中助剂为钙锌稳定剂,上阶双螺杆加工温度为150-160℃,下阶单螺杆温度为140-150℃。
Claims (6)
1.一种低烟无卤阻燃高强度薄壁绝缘料,其特征在于:将功能填料晶须鼓风干燥后滴加六甲基二硅氮烷和二月桂酸二丁基锡,升温回流冷凝反应,得表面接枝改性晶须;将氢氧化镁研磨过筛后烘干,加表面处理剂高速搅拌,与红磷母料混合得复配填料;将三氧化二锑、硼酸锌加入增塑剂中,搅拌成糊状浆料,机械研磨;向高速混合机中通入蒸汽加热,投入PVC树脂,加入所得研磨好的浆料,低速搅拌加环氧大豆油和四溴苯酐酯,当料温升至70-80℃,高速搅拌加入前面所得改性填料及助剂,当料温为110-120℃时低速搅拌,当料温降至40-50℃时出料;将捏合好的物料投入双螺杆挤出机料斗中,挤出造粒,得到所述高强度绝缘料。
2.一种低烟无卤阻燃高强度薄壁绝缘料,其特征在于,按以下步骤进行:
(1)功能填料晶须的表面处理工艺:
将6-7份晶须在145-150℃鼓风干燥箱中干燥1-2h,机械搅拌下滴加0.5-1份六甲基二硅氮烷和1滴二月桂酸二丁基锡,升温至195-200℃回流冷凝反应1-2h,降至室温,得到表面接枝改性的晶须;
(2)氢氧化镁的表面处理:
将15-20份氢氧化镁研磨过60目筛,在105-110℃下烘2-3h,加入1-2份表面处理剂,用搅拌机高速搅拌10-15min,在105-110℃下烘1-2h,然后与5-10份红磷母料混合,得到复配填料;
(3)阻燃剂的预处理:
将4-6份三氧化二锑、3-5份硼酸锌加入30-32份增塑剂中,搅拌成糊状浆料,用研磨机研磨2-4遍后,持续搅拌;
(4)高强度绝缘料的捏合与造粒工艺:
捏合:向高速混合机中通入0.2MP的蒸汽进行加热,投入100-110份PVC树脂,加入(3)中所得研磨好的浆料,低速搅拌加入3-5份环氧大豆油和8-10份四溴苯酐酯,当料温升至70-80℃,高速搅拌加入(1)(2)中所得改性填料及4-5份助剂,当料温为110-120℃时低速搅拌,当料温降至40-50℃时出料;
造粒:将上述所得捏合好的物料投入双螺杆挤出机料斗中,挤出造粒,得到所述高强度绝缘料。
3.根据权利要求2所述的一种低烟无卤阻燃高强度薄壁绝缘料,其特征在于,步骤(1)中晶须为碱式硫酸镁晶须、硼酸镁晶须中的一种或两种任意比例的混合。
4.根据权利要求2所述的一种低烟无卤阻燃高强度薄壁绝缘料,其特征在于,步骤(2)中表面处理剂为硅烷类偶联剂A151或钛酸酯类偶联剂JN201,红磷母料为RPM650。
5.根据权利要求2所述的一种低烟无卤阻燃高强度薄壁绝缘料,其特征在于,步骤(3)中增塑剂为DOTP。
6.根据权利要求2所述的一种低烟无卤阻燃高强度薄壁绝缘料,其特征在于,步骤(4)中助剂为钙锌稳定剂,上阶双螺杆加工温度为150-165℃,下阶单螺杆温度为140-155℃。
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CN111363267B (zh) * | 2020-03-16 | 2022-02-15 | 哈尔滨理工大学 | 一种氢氧化镁/氢氧化铝/硼酸锌协效阻燃光缆pvc阻燃护套料的制备方法 |
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