CN104927242B - 一种高耐热抗冲pvc管材及其制备方法 - Google Patents
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 20
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 14
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- 150000003983 crown ethers Chemical class 0.000 claims abstract description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims abstract description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 239000008117 stearic acid Substances 0.000 claims abstract description 5
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- 238000003756 stirring Methods 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 4
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical group C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 3
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
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- 238000001125 extrusion Methods 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 abstract description 36
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Abstract
本发明属于PVC管材及其制备方法技术领域，具体公开了一种高耐热抗冲PVC管材及其制备方法。该PVC管材，由下列重量份配比的原料制成：PVC？100份，热稳定剂4份，硬脂酸1份，石蜡1份，钛白粉5份，液态丁腈橡胶4份，纳米碳酸钙16份，甲基丙烯酸羟乙酯1份，N,N-二羟乙基对甲基苯胺0.25份，过氧化苯甲酰0.25份。本发明制备的PVC管材具有优良的耐热性能和优异的抗冲击性能，且易于加工，作为一种高性能PVC管材可推广使用，具有良好的市场竞争力。
Description
技术领域
本发明涉及PVC管材及其制备方法技术领域，具体涉及一种高耐热抗冲PVC管材及其制备方法。
背景技术
PVC管材因具有价格低廉、综合性能优良、加工安装方便等诸多优点而得到广泛的应用。作为下水管的PVC管材以硬质PVC用量最多，但是硬质PVC存在耐热性差和抗冲击性能差的缺点。通常，对PVC的耐热改性一定程度上劣化了PVC材料的加工性能和力学性能，而PVC的增韧改性尽管提高了PVC材料韧性，却往往牺牲了PVC材料的耐热性、拉伸强度和模量。由此可见，PVC材料的耐热改性与增韧改性存在一定的对立性。与此同时，随着科技水平的快速发展，对PVC管材性能的要求愈来愈高。如何同时提高PVC管材的耐热性和抗冲性能，这是一个值得去探讨和研究的问题。
发明内容
本发明有效克服了现有技术中存在的不足，提供了一种高耐热抗冲PVC管材及其制备方法，该PVC管材具有良好的耐热性能的同时，还具有优异的抗冲击性能。
为实现上述目的，本发明采用的技术方案如下：
一种高耐热抗冲PVC管材，由下列重量份配比的原料制成：
上述方案中所述的PVC树脂为SG5型，其k值为66。
上述方案中所述的热稳定剂为钙锌复合热稳定剂，优选STA-302PR钙锌稳定剂；
上述方案中所述的石蜡为PVC塑料专用石蜡，优选昆仑板蜡，牌号58#；
上述方案中所述的钛白粉为金红石型钛白粉。
上述方案中所述的液态丁腈橡胶为丙烯腈含量为28％的端羧基液态丁腈橡胶。
上述方案中所述纳米碳酸钙的平均粒径为40nm。
一种上述方案中所述原料配方的高耐热抗冲PVC管材的制备方法，依次包括以下步骤：
(1)称取配方量一半的液态丁腈橡胶溶于配方量一半的甲基丙烯酸羟乙酯中，同时添加N,N-二羟乙基对甲基苯胺搅拌均匀，然后加入到装有纳米碳酸钙的高速混合机中，高速混合5min，得A组分；
另外称取配方量一半的液态丁腈橡胶溶于配方量一半的甲基丙烯酸羟乙酯中，与此同时加入过氧化苯甲酰一起搅拌均匀，得B组分；
将B组分添加到A组分中，继续高速混合5min，取出粉体，于80℃真空干燥4h，得到改性纳米碳酸钙；
(2)将PVC、钙锌复合热稳定剂、硬脂酸、石蜡、钛白粉及改性纳米碳酸钙用高速搅拌机进行混合，设定其料筒初始温度为105℃并开始加热，当料筒中混合料温度达到120℃时，放入低速混合机中冷混搅拌，当混合料温度降至45℃时，卸料，并投入锥形双螺杆挤出机中挤出成型得管材，双螺杆挤出机加工温度范围为150-190℃。
所述锥形双螺杆挤出机中优选的参数设置为：螺杆转速为45r/min，螺杆三段温度分别为150℃、175℃、185℃，口模温度为190℃。
本发明的优点和有益效果：
本发明制备的PVC管材具有优良的耐热性能和优异的抗冲击性能，且易于加工，作为一种高性能PVC管材可推广使用，具有良好的市场竞争力。
具体实施方式
下面申请人将结合具体的实施例对本发明的技术方案做进一步的详细说明。
以下实施例中钙锌复合热稳定剂为东莞市三盛实业有限公司生产的STA-302PR钙锌稳定剂；
石蜡为PVC塑料专用石蜡：昆仑板蜡，牌号58#；
PVC为SG5型，其k值为66；
钛白粉为金红石型钛白粉；
液态丁腈橡胶为丙烯腈含量为28％的端羧基液态丁腈橡胶；
纳米碳酸钙的平均粒径为40nm。
实施例：
一种高耐热抗冲PVC管材，其制备方法包括以下步骤：
(1)称取2phr液态丁腈橡胶溶于0.5phr甲基丙烯酸羟乙酯中，同时添加0.25phrN,N-二羟乙基对甲基苯胺搅拌均匀，然后加入到装有16phr纳米碳酸钙的高速混合机中，高速混合5min，得A组分；
另外称取2phr液态丁腈橡胶溶于0.5phr甲基丙烯酸羟乙酯中，与此同时加入0.25phr过氧化苯甲酰一起搅拌均匀，得B组分；
将B组分添加到A组分中，继续高速混合5min，取出粉体，于80℃真空干燥4h，得到改性纳米碳酸钙；
所述高速混合的速度在1500r/min以上。
(2)将100phrPVC、4phr钙锌复合热稳定剂、1phr硬脂酸、1phr石蜡、5phr钛白粉及步骤(1)所得改性纳米碳酸钙用高速搅拌机进行混合，设定其料筒初始温度为105℃并开始加热，当料筒中混合料温度达到120℃时，放入低速混合机中冷混搅拌，当混合料温度降至45℃时，卸料，并投入锥形双螺杆挤出机中，在螺杆转速为45r/min，螺杆三段温度分别为150℃、175℃、185℃，口模温度为190℃的条件下，按照常规方法依次进行挤出加工成型、真空定径、牵引、最后冷却至室温后根据所需长度切断并进行管材扩口即得。
上述制得的PVC管材性能检测如下表所示：
| 检测项目 | 检测结果 | 检测标准 |
| 拉伸强度(MPa) | 46 | GB/T1040-2006 |
| 断裂伸长率(％) | 119 | GB/T1040-2006 |
| 25℃缺口冲击强度(kJ/m2) | 9.8 | GB/T1043-2008 |
| 0℃缺口冲击强度(kJ/m2) | 5.6 | GB/T1043-2008 |
| 弹性模量(GPa) | 1.37 | GB/T1040-2006 |
| 纵向回缩率(％) | 2.3 | GB/T6671-2001 |
| 维卡软化点温度(℃) | 102.4 | GB/T1633-2000 |
Claims (7)
1.一种高耐热抗冲PVC管材，由下列重量份配比的原料制成：
原料重量份
PVC100，
热稳定剂4，
硬脂酸1，
石蜡1，
钛白粉5，
液态丁腈橡胶4，
纳米碳酸钙16，
甲基丙烯酸羟乙酯1，
N,N-二羟乙基对甲基苯胺0.25，
过氧化苯甲酰0.25；
所述的PVC为SG5型，其k值为66；
所述的热稳定剂为钙锌复合热稳定剂；
所述的钛白粉为金红石型钛白粉。
2.根据权利要求1所述的高耐热抗冲PVC管材，其特征在于：所述热稳定剂为STA-302PR钙锌稳定剂。
3.根据权利要求1所述的高耐热抗冲PVC管材，其特征在于：所述石蜡为昆仑板蜡，牌号58#。
4.根据权利要求1所述的高耐热抗冲PVC管材，其特征在于：所述液态丁腈橡胶为丙烯腈含量为28%的端羧基液态丁腈橡胶。
5.根据权利要求1所述的高耐热抗冲PVC管材，其特征在于：所述纳米碳酸钙的平均粒径为40nm。
6.一种权利要求1-5中任一所述的高耐热抗冲PVC管材的制备方法，依次包括以下步骤：
称取配方量一半的液态丁腈橡胶溶于配方量一半的甲基丙烯酸羟乙酯中，同时添加N,N-二羟乙基对甲基苯胺搅拌均匀，然后加入到装有纳米碳酸钙的高速混合机中，高速混合5min，得A组分；
另外称取配方量一半的液态丁腈橡胶溶于配方量一半的甲基丙烯酸羟乙酯中，与此同时加入过氧化苯甲酰一起搅拌均匀，得B组分；
将B组分添加到A组分中，继续高速混合5min，取出粉体，于80℃真空干燥4h，得到改性纳米碳酸钙；
将PVC、钙锌复合热稳定剂、硬脂酸、石蜡、钛白粉及改性纳米碳酸钙用高速搅拌机进行混合，设定其料筒初始温度为105℃并开始加热，当料筒中混合料温度达到120℃时，放入低速混合机中冷混搅拌，当混合料温度降至45℃时，卸料，并投入锥形双螺杆挤出机中挤出成型得管材，双螺杆挤出机加工温度范围为150-190℃。
7.根据权利要求6所述的制备方法，其特征在于：所述锥形双螺杆挤出机中参数设置为：螺杆转速为45r/min，螺杆三段温度分别为150℃、175℃、185℃，口模温度为190℃。
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