CN111635602B - 一种耐热性和分散性高的色母粒 - Google Patents
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Abstract
公开了一种色母粒,所述色母粒包括:PVC树脂;EVA蜡;黄色有机颜料;复合分散剂;所述复合分散剂选自丙烯海松酸接枝聚‑(12‑羟基硬脂酸)和月桂酸二乙醇酰胺。所述色母粒不仅在高温下具有较低的色差即较高的耐热性,同时具有较高的分散性。
Description
技术领域
本发明属于塑料颜料技术领域;涉及一种色母粒,尤其是一种耐热性和分散性高的色母粒。
背景技术
SPC地板,又称石塑地板。SPC地板的主要成分是PVC(聚氯乙烯)和大理石粉。SPC地板绿色环保,通常采取锁扣方式进行安装,不使用含甲醛的胶粘剂,因此无毒无害,无放射性污染,对环境无污染,属绿色环保产品,可循环使用。SPC地板表面有一层特殊的经高科技加工的透明耐磨层,具有超强的耐磨性,在人流量较大的医院、商场和高铁站等场所,越来越受到人们的欢迎。此外,SPC地板防水防潮,遇水不变形;同时绝缘阻燃,耐酸碱腐蚀,安全性高。
SPC地板花色新颖,多种花色可供选择,色彩绚丽,自然逼真,任意拼组花色造型,突出个性色彩。为了赋予地板不同的花色和颜色,通常需要选择各种不同性能的色母粒。色母粒是将一定量的颜料均匀地分散于载体树脂中所得到的颜料浓缩物。随着色母粒工业的不断发展,色母粒越来越向颜料高浓度化方向发展。但是,色母粒中颜料含量越高,色母粒的分散性越差。此外,当色母粒与树脂混合时,通常在高温下进行注塑,又要求色母粒具有较高的耐热性,尤其是要求其在高温下具有较低的色差。
张作才等人(塑料科技,2019,47(7),111)公开了一种木塑复合材料,包括剑麻纤维素微晶MCF和非极性树脂PP。为了提高该类复合材料的界面黏接强度,使用了松香酸改性的RA-g-PEPA超分散剂。结果表明:PP/MCF木塑复合材料的冲击强度最大可达16.8kJ/m2,且表现出较好的力学性能和加工流动性能。微观形貌分析表明,添加RA-g-PEPA超分散剂后,MCF与PP树脂的界面黏结力增强,木塑复合材料的断裂方式有所改变。上述文献未记载该超分散剂是否可应用于PVC树脂。
众所周知,SPC地板的树脂为PVC树脂,其与色母粒的相容性不太好。尤其是,当使用黄色有机颜料时,色母粒的耐热性和分散性仍然不能令人满意。
因此,仍然需要针对现有技术的上述缺陷,提供一种耐热性和分散性高的色母粒。
发明内容
本发明的目的在于提供一种耐热性和分散性高的色母粒。所述色母粒不仅在高温下具有较低的色差即较高的耐热性,同时具有较高的分散性。
为了解决上述技术问题,本发明采用以下技术方案:一种色母粒,所述色母粒包括:
PVC树脂;
EVA蜡;
黄色有机颜料;
复合分散剂;
其特征在于,
所述复合分散剂选自丙烯海松酸接枝聚-(12-羟基硬脂酸)和月桂酸二乙醇酰胺。
根据本发明所述的色母粒,其中,所述PVC树脂选自悬浮法生产的PVC树脂,平均聚合度为1000-1150。
在一个具体的实施方式中,所述PVC树脂选自PVC SG-5树脂(山东信发集团;平均聚合度为1050;CAS:93050-82-9)。
根据本发明所述的色母粒,其中,所述PVC树脂的重量为30-50份。
根据本发明所述的色母粒,其中,所述EVA蜡选自重均分子量为9300且VA含量13-15%的EVA蜡。
在一个具体的实施方式中,所述EVA蜡选自Luwax EVA3(BASF;CAS号:111-46-6)。
根据本发明所述的色母粒,其中,所述EVA蜡的重量为4-6份。
根据本发明所述的色母粒,其中,所述黄色有机颜料选自C.I.颜料黄139(CAS:36888-99-0)。
根据本发明所述的色母粒,其中,所述黄色有机颜料的重量为40-60份。
根据本发明所述的色母粒,其中,所述丙烯海松酸接枝聚-(12-羟基硬脂酸)与月桂酸二乙醇酰胺的重量比(3-4):1。
在本发明中,丙烯海松酸接枝聚-(12-羟基硬脂酸)按照张作才等人(塑料科技,2019,47(7),111)进行合成和表征。
根据本发明所述的色母粒,其中,所述复合分散剂的重量为4-5份。
根据本发明所述的色母粒,其中,所述色母粒进一步含有任选的其它助剂。
作为助剂,可以举出:抗氧化剂,紫外吸收剂,阻燃剂,硬脂酸钙;等等。
本发明的色母粒按照本领域的常规工艺进行制备。
在一个具体的实施方式中,按照配方,先将PVC树脂、EVA蜡、复合分散剂和任选的其它助剂加入高速混合机中,搅拌混合;然后加入黄色有机颜料,使其搅拌均匀;再将物料加入双螺杆挤出机中熔融,塑化,切粒。
发明人发现,使用本发明所述的复合分散剂制备色母粒,不仅在高温下具有较低的色差即较高的耐热性,同时具有较高的分散性。
具体实施方式
下面结合具体实施方式,进一步阐述本发明。
应理解,本发明的具体实施方式仅用于阐释本发明的精神和原则,而不用于限制本发明的范围。此外应理解,在阅读了本发明的内容之后,本领域技术人员可以对本发明的技术方案作出各种改动、替换、删减、修正或调整,这些等价技术方案同样落于本发明权利要求书所限定的范围。
在本发明中,如无其它说明,所有份数均为重量份。
在本发明中,丙烯海松酸接枝聚-(12-羟基硬脂酸)按照如下方法制备:将30重量份松香酸在氮气保护下加热至230℃,滴加8.58重量份丙烯酸溶液;滴加完毕后继续反应2h,自然冷却至200℃。使用酸碱滴定法测定酸值,达到275mgKOH/g左右,即为丙烯海松酸。取30重量份12-羟基硬脂酸在氮气保护下加热至100℃,完全熔融后加入0.375重量份对甲苯磺酸作为催化剂,升温至130℃,保温反应6h,冷却出料,在60℃条件烘10h,得到聚-(12-羟基硬脂酸)。将12.36重量份丙烯海松酸和167.24重量份聚-(12-羟基硬脂酸)加热至130℃,保温反应10h,冷却出料,即得产品。
在本发明中,耐热性试验方法如下:注射成型样片,按照国家标准GB/T 5698-2001中色差公式计算被测样片与标样(200℃)的色差,得到符合色差范围(≤1.0)的耐热温度。
在本发明中,分散性按照压力升指数法进行,分别测定P1(60min内压力升指数)和P2(最后15min内压力升指数)。分散性良好的标准是P1≤0.10,P2≤0.14。二者数值越小越好。
实施例1
色母粒的配方如下,包括:
PVC SG-5树脂40份;
BASF Luwax EVA3蜡5份;
C.I.颜料黄139 48份;
丙烯海松酸接枝聚-(12-羟基硬脂酸)3.5份;
月桂酸二乙醇酰胺1份;
抗氧化剂1010 1份;
硬脂酸钙1.5份;
按照配方,先将PVC树脂、EVA蜡、复合分散剂和其它助剂加入高速混合机中,搅拌混合;再加入黄色有机颜料,使其搅拌均匀;再将物料加入双螺杆挤出机中熔融,塑化,切粒;双螺杆挤出机一区至五区温度分别为170℃、175℃、175℃、175℃、180℃;主机转速为100rpm;喂料转速为20rpm;熔体压强为2MPa。
比较例1
同实施例1,将丙烯海松酸接枝聚-(12-羟基硬脂酸)替换为月桂酸二乙醇酰胺。
比较例2
同实施例1,将月桂酸二乙醇酰胺替换为丙烯海松酸接枝聚-(12-羟基硬脂酸)。
比较例3
同实施例1,将丙烯海松酸接枝聚-(12-羟基硬脂酸)替换为松香酸。
性能测试
按照前述方法测定实施例1和比较例1-3的色差和P1-P2。结果参见表1和表2。
表1
试样 | 200℃ | 210℃ | 220℃ | 230℃ | 240℃ | 250℃ |
实施例1 | 0 | 0.23 | 0.48 | 0.83 | 1.19 | 1.35 |
比较例1 | 0 | 0.37 | 0.69 | 1.07 | 1.41 | 1.72 |
比较例2 | 0 | 0.31 | 0.58 | 0.94 | 1.29 | 1.50 |
比较例3 | 0 | 0.34 | 0.72 | 1.05 | 1.34 | 1.81 |
表2
试样 | P<sub>1</sub> | P<sub>2</sub> |
实施例1 | 0.057 | 0.079 |
比较例1 | 0.082 | 0.141 |
比较例2 | 0.076 | 0.092 |
比较例3 | 0.105 | 0.163 |
由表1可以看出,与比较例1-3相比,本发明实施例1的色母粒不仅在高温下具有较低的色差即较高的耐热性,同时具有较高的分散性。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均包含在本发明的保护范围之内。
Claims (3)
1.一种色母粒,所述色母粒包括:
PVC树脂;
EVA蜡;
黄色有机颜料;
复合分散剂;
其特征在于,
所述复合分散剂选自丙烯海松酸接枝聚-(12-羟基硬脂酸)和月桂酸二乙醇酰胺;
所述PVC树脂选自悬浮法生产的PVC树脂,平均聚合度为1000-1150;
所述PVC树脂的重量为30-50份;
所述EVA蜡的重量为4-6份;
所述黄色有机颜料选自C.I.颜料黄139;
所述黄色有机颜料的重量为40-60份;
所述丙烯海松酸接枝聚-(12-羟基硬脂酸)与月桂酸二乙醇酰胺的重量比(3-4):1;
所述复合分散剂的重量为4-5份。
2.根据权利要求1所述的色母粒,其中,所述EVA蜡选自重均分子量为9300且VA含量13-15%的EVA蜡。
3.根据权利要求1所述的色母粒,其中,所述色母粒进一步含有任选的其它助剂。
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