CN111518260A - 一种新型的聚氨酯泡棉组合物 - Google Patents
一种新型的聚氨酯泡棉组合物 Download PDFInfo
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Abstract
本发明提供一种新型的聚氨酯泡棉组合物,包括A组分和B组分,其中A组分为异氰酸酯,重量份数为100份,B组分为白料,包括以下重量份的组分:多元醇组合物75~110份;聚二甲基硅氧烷5~25份;第一交联剂二丙二醇DPG 1~2份;第二交联剂过氧化二异丙苯DCP 2~5份;纳米矿晶10~21份;催化剂辛酸亚锡0.3~1份;发泡剂水5~15份;匀泡剂硅油1~4份。本发明制备的聚氨酯泡棉产品具有更好的延伸性和密封性,能够满足电子产品的更新升级的需要。
Description
技术领域
本发明涉及一种聚氨酯泡棉产品,尤其涉及一种新型的聚氨酯泡棉组合物。
背景技术
消费市场对电子产品的需求日益增加。特别是对便携电子设备(如电话、游戏控制器、音乐播放机、平板电视、笔记本电脑、以及平板电脑)的需求愈加普遍。随着便携电子设备的更新换代,新产品被设计的越来越薄,对于超薄电子产品,由于其内部空间有限,更需要使用超薄的密封垫片和粘合胶带。
与聚乙烯或丙烯酸泡棉垫片和粘合胶带相比,聚氨酯泡棉垫片和粘合胶带具有更好的拉伸延展性能,从而具有更好的分散应力和吸收振动的能力,当与垫片和粘合胶带相连接的其他元件因温度或外力发生变形时,聚氨酯泡棉垫片和粘合胶带能够具有更好的密封性能,且不易断裂变形。
因此,实有必要提供一种性能更好的聚氨酯泡棉产品以满足电子产品更新升级的需求。
发明内容
本发明通过提供一种新型的聚氨酯泡棉组合物,使得制备得到的聚氨酯泡棉产品具有更好的延伸性和密封性,能够满足电子产品的更新升级的需要。
本发明实施例提供一种新型的聚氨酯泡棉组合物,包括A组分和B组分,其中所述A组分为异氰酸酯,重量份数为100份;所述B组分为白料,其组分以及重量份配比如下:
多元醇组合物75~110份;
聚二甲基硅氧烷5~25份;
第一交联剂二丙二醇(DPG)1~2份;
第二交联剂过氧化二异丙苯(DCP)2~5份;
纳米矿晶10~21份;
催化剂辛酸亚锡(T9)0.3~1份;
发泡剂水5~15份;
匀泡剂硅油(CGY-3)1~4份。
优选的,所述异氰酸酯包括80~90wt%的二苯基甲烷二异氰酸酯和10~20wt%的甲苯二异氰酸酯。
优选的,所述多元醇组合物包含:羟值为150~300、官能度为3~8的聚醚多元醇和羟值为20~500、官能度为2~3的聚酯多元醇,其中所述聚醚多元醇的重量百分比为60~75%,所述聚酯多元醇的重量百分比为25~40wt%。
其中:
本发明通过控制异氰酸酯、多元醇组合物的组成,以及两者与第一交联剂和第二交联剂、发泡剂水、纳米矿晶、催化剂T9等的加入量,使得凝胶速率和发泡速率达到一个平衡值,泡沫尺寸稳定,光滑度好。
通过加入所述聚二甲基硅氧烷可以提升聚氨酯泡棉的延伸性能,同时协同阻燃。
所述纳米矿晶的作用表现在三方面,第一方面为将异氰酸酯与水生成的二氧化碳气体分割为纳米气泡,使得泡孔更均匀;第二方面为,纳米矿晶的纳米孔可以延缓气体的释放速度,从而降低发泡的速率;第三方面为,纳米矿晶的纳米孔可以容纳部分二氧化碳气体,协同阻燃。
所述匀泡剂用于稳定泡沫性能。
优选的,所述纳米矿晶的粒径为20~50nm。
当所述纳米矿晶尺寸小于20nm时,会使得发泡反应速率降低凝胶反应速度,进而导致发泡时间较长,成型高度降低;当所述纳米矿晶尺寸大于50nm时,会使得泡孔壁的凝胶固化速率远小于泡孔的扩张速度,可能会出现大面积塌泡现象,不利于泡孔形态的稳定性。
更为优选的,所述纳米矿晶为同一尺寸,其粒径为30nm,这样可以进一步保证泡孔的均匀性和光滑度。
优选的,所述第一交联剂、所述第二交联剂、所述纳米矿晶的重量比值为1:(2~5):(10~20)。
优选的,所述第二交联剂和发泡剂水的重量比值为1:(2~5)。
实验证明,通过加入第二交联剂,并控制其与第一交联剂、纳米矿晶和水的比值可使得发泡熔体量的气体和熔体的黏度达到一个较佳的平衡值,可形成分布均匀且较小的气体,使材料具有较好的拉伸性能。
优选的,所述聚氨酯泡棉组合物还包括以下材料的一种或其任何组合:阻燃剂、颜料、防老化剂。
优选的,所述阻燃剂为磷酸三(1-氯-乙丙基)酯(TCPP)。
通过加入阻燃剂TCPP,使得聚氨酯材料具有优异的阻燃性能,避免了在物品燃烧中产生的危害性。
优选的,所述颜料为黑色颜料。
优选的,所述防老剂包括紫外线吸收剂和受阻胺光稳定的抗氧化剂。
在本发明中,所述紫外线吸收剂为UV-312,所述抗氧化剂为癸二酸(1,2,2,6,6-五甲基-4-哌啶醇甲酯)。
本发明具有以下有益效果:
水作为发泡剂参与反应放出大量的热量,通过加入一定量的交联剂DCP,使得共混发泡材料在熔融状态下发生交联,使熔体黏度增大,可包裹住气体,同时因为发泡体系中存在纳米矿晶,可以通过纳米矿晶的纳米孔将反应生成的气体分割为纳米气泡,使得整个体系的泡孔均匀,且较小,使材料具有较好拉伸性能和密封性能,在温度变化或结构变形的情况下确保对间隙的密封效果。但是因为熔体黏度增大,存在流动性差的问题,可能会造成气泡破裂现象,使得体系的拉伸性能下降,因此,在反应体系中通过加入适量的聚二甲基硅氧烷以提高体系的拉伸性能。另外,聚二甲基硅氧烷能够协同阻燃。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明的一种新型的聚氨酯泡棉组合物,包括A组分和B组分,其中所述A组分为异氰酸酯,重量份数为100份,所述B组分为白料,其组分以及重量份配比如下:多元醇组合物75~110份;聚二甲基硅氧烷5~25份;第一交联剂二丙二醇(DPG)1~2份;第二交联剂过氧化二异丙苯(DCP)2~5份;纳米矿晶10~21份;催化剂辛酸亚锡(T9)0.3~1份;发泡剂水5~15份;匀泡剂硅油(CGY-3)1~4份。首先按配方称取白料中的各组分,并通过搅拌使其混合均匀,搅拌速度控制在800~1200r/min,再将搅拌均匀的白料加入到预先预热的模具中,所述模具的表面温度为40~45℃,然后通过高压枪将异氰酸酯加入到所述白料中,本发明中预先将模具加热至40~45℃,以使发泡反应发生后,发泡材料能够在熔融状态材料发生交联。
其中,
所述异氰酸酯包括80~90wt%的二苯基甲烷二异氰酸酯和10~20wt%的甲苯二异氰酸酯。
所述多元醇组合物包含:羟值为150~300、官能度为3~8的聚醚多元醇,60~75wt%;羟值为20~500、官能度为2~3的聚酯多元醇,25~40wt%。
所述纳米矿晶的粒径为20~50nm。
所述第一交联剂、所述第二交联剂、所述纳米矿晶的重量比值为1:(2~5):(10~20)。
所述第二交联剂和发泡剂水的重量比值为1:(2~5)。
本发明通过控制异氰酸酯、多元醇组合物的组成,以及两者与第一交联剂和第二交联剂、发泡剂水、纳米矿晶等的加入量,使得凝胶速率和发泡速率达到一个平衡值,泡沫尺寸稳定,光滑度好。
通过加入所述聚二甲基硅氧烷可以提升聚氨酯泡棉的延伸性能,同时协同阻烯。
所述纳米矿晶的作用表现在三方面,第一方面为将异氰酸酯与水生成的二氧化碳气体分割为纳米气泡,使得泡孔更均匀;第二方面为,纳米矿晶的纳米孔可以延缓气体的释放速度,从而降低发泡的速率;第三方面为,纳米矿晶的纳米孔可以容纳部分二氧化碳气体,协同阻燃。
进一步地,所述纳米矿晶的粒径为20~50nm。当所述纳米矿晶尺寸小于20nm时,会使得发泡反应速率降低凝胶反应速度,进而导致发泡时间较长,成型高度降低;当所述纳米矿晶尺寸大于50nm时,会使得泡孔壁的凝胶固化速率远小于泡孔的扩张速度,容出现大面积塌泡现象,不利于泡孔形态的稳定性。
更进一步地,所述纳米矿晶为同一尺寸,其粒径为30nm,这样可以进一步保证泡孔的均匀性和光滑度。
所述匀泡剂用于稳定泡沫性能。
另外,所述聚氨酯泡棉组合物还包括以下材料的一种或其任何组合:阻燃剂、颜料、防老化剂。
具体地,所述阻燃剂为磷酸三(1-氯-乙丙基)酯(TCPP),其重量份数为4~6份,所述颜料为黑色颜料,其重量份数为2~6份,所述紫外线吸收剂为紫外线吸收剂UV-312,其重量份数为2.5~4.5份,所述抗氧化剂为癸二酸(1,2,2,6,6-五甲基-4-哌啶醇甲酯),其重量份数为1.5~3.4份。通过加入上述功能助剂,可使得使得聚氨酯产品具有优异的阻燃性能和更长的使用寿命。
上述功能试剂直接加入到B组分中混合均匀后,再加入异氰酸酯。
一、对比例1~5和实施例1~7的聚氨酯泡棉组合物的配方组成
对比例1
对比例1中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯80份;甲苯二异氰酸酯20份;羟值为150~300,官能度为3~8的聚醚多元醇45份;羟值为20~500,官能度为2~3的聚酯多元醇30份;聚二甲基硅氧烷5份;第一交联剂DPG1份;第二交联剂DCP5份;催化剂T9 1份;发泡剂水10份;匀泡剂硅油CGY-3 1份。
对比例2
对比例2中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯85份;甲苯二异氰酸酯15份;羟值为150~300,官能度为3~8的聚醚多元醇50份;羟值为20~500,官能度为2~3的聚酯多元醇30份;聚二甲基硅氧烷8份;交联剂DPG 6.0份;粒径为30nm的纳米矿晶12份;催化剂T9 0.7份;发泡剂水12份;匀泡剂硅油CGY-3 2份。
对比例3
对比例3中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯100份;羟值为150~300,官能度为3~8的聚醚多元醇80份;第一交联剂DPG 1.8份;第二交联剂DCP 4.0份;粒径为20~50nm的纳米矿晶19份;催化剂T9 0.9份;发泡剂水12份;匀泡剂硅油CGY-3 3份;阻燃剂TCPP 4份;颜料2份;紫外吸收剂UV-312 2.5份;抗氧化剂1.5份。
对比例4
对比例4中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯80份;甲苯二异氰酸酯20份;羟值为150~300,官能度为3~8的聚醚多元醇45份;羟值为20~500,官能度为2~3的聚酯多元醇30份;聚二甲基硅氧烷5份;第一交联剂DPG 1份;第二交联剂DCP 5份;粒径为10~15nm的纳米矿晶30份;催化剂T91份;发泡剂水20份;匀泡剂硅油CGY-3 1份。
对比例5
对比例5中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯85份;甲苯二异氰酸酯15份;羟值为150~300,官能度为3~8的聚醚多元醇50份;羟值为20~500,官能度为2~3的聚酯多元醇30份;聚二甲基硅氧烷8份;第一交联剂DPG 1.5份;第二交联剂DCP 1.5份;粒径为20~50nm的纳米矿晶12份;催化剂T9 0.7份;发泡剂水12份;匀泡剂硅油CGY-3 2份;阻燃剂TCPP 4份;颜料2份;紫外吸收剂UV-312 2.5份;抗氧化剂1.5份。
实施例1
本实施例中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯80份;甲苯二异氰酸酯20份;羟值为150~300,官能度为3~8的聚醚多元醇45份;羟值为20~500,官能度为2~3的聚酯多元醇30份;聚二甲基硅氧烷5份;第一交联剂DPG1份;第二交联剂DCP5份;粒径为20~50nm的纳米矿晶10份;催化剂T9 1份;发泡剂水10份;匀泡剂硅油CGY-3 1份。
实施例2
本实施例中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯85份;甲苯二异氰酸酯15份;羟值为150~300,官能度为3~8的聚醚多元醇50份;羟值为20~500,官能度为2~3的聚酯多元醇30份;聚二甲基硅氧烷8份;第一交联剂DPG 1.5份;第二交联剂DCP 4.5份;粒径为20~50nm的纳米矿晶12份;催化剂T9 0.7份;发泡剂水12份;匀泡剂硅油CGY-3 2份。
实施例3
本实施例中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯90份;甲苯二异氰酸酯10份;羟值为150~300,官能度为3~8的聚醚多元醇60份;羟值为20~500,官能度为2~3的聚酯多元醇20份;聚二甲基硅氧烷12份;第一交联剂DPG 1.8份;第二交联剂DCP 4.0份;粒径为20~50nm的纳米矿晶19份;催化剂T9 0.9份;发泡剂水12份;匀泡剂硅油CGY-3 3份;阻燃剂TCPP 4份;颜料2份;紫外吸收剂UV-312 2.5份;抗氧化剂1.5份。
实施例4
本实施例中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯83份;甲苯二异氰酸酯17份;羟值为150~300,官能度为3~8的聚醚多元醇58份;羟值为20~500,官能度为2~3的聚酯多元醇27份;聚二甲基硅氧烷15份;第一交联剂DPG 2份;第二交联剂DCP 5份;粒径为20~50nm的纳米矿晶21份;催化剂T9 1.2份;发泡剂水15份;匀泡剂硅油CGY-3 4份;阻燃剂TCPP 5份;颜料4份;紫外吸收剂UV-312 3.0份;抗氧化剂3.2份。
实施例5
本实施例中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯88份;甲苯二异氰酸酯12份;羟值为150~300,官能度为3~8的聚醚多元醇55份;羟值为20~500,官能度为2~3的聚酯多元醇35份;聚二甲基硅氧烷20份;第一交联剂DPG 1.4份;第二交联剂DCP 4.0份;粒径为20~50nm的纳米矿晶18份;催化剂T9 1份;发泡剂水12份;匀泡剂硅油CGY-3 4份;阻燃剂TCPP 4份;颜料6份;紫外吸收剂UV-312 2.5份;抗氧化剂3.4份。
实施例6
本实施例中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯90份;甲苯二异氰酸酯10份;羟值为150~300,官能度为3~8的聚醚多元醇70份;羟值为20~500,官能度为2~3的聚酯多元醇30份;聚二甲基硅氧烷25份;第一交联剂DPG 1份;第二交联剂DCP 3份;粒径为30nm的纳米矿晶15份;催化剂T90.8份;发泡剂水12份;匀泡剂硅油CGY-3 3.5份;阻燃剂TCPP5份;颜料3份;紫外吸收剂UV-312 3.5份;抗氧化剂2.5份。
实施例7
本实施例中聚氨酯泡棉组合物包括如下重量份的组分:
二苯基甲烷二异氰酸酯80份;甲苯二异氰酸酯20份;羟值为150~300,官能度为3~8的聚醚多元醇70份;羟值为20~500,官能度为2~3的聚酯多元醇30份;聚二甲基硅氧烷20份;第一交联剂DPG 1.5份;第二交联剂DCP 5份;粒径为30nm的纳米矿晶20份;催化剂T90.6份;发泡剂水15份;匀泡剂硅油CGY-3 4份;阻燃剂TCPP 6份;颜料4份;紫外吸收剂UV-312 3.0份;抗氧化剂2.0份。
对比例1~5及实施例1~7制备的聚氨酯泡棉组合物的制备方法均为:
首先按配方称取白料中的各组分,并通过搅拌使其混合均匀,搅拌速度控制在800~1200r/min,再将搅拌均匀的白料加入到预先预热的模具中,所述模具的表面温度为40~45℃,然后通过高压枪将异氰酸酯加入到所述白料中,本发明中预先将模具加热至40~45℃,以使发泡反应发生后,发泡材料能够在熔融状态材料发生交联。
将发泡后的聚氨酯泡棉组合物处理成0.1mm的聚氨脂膜,然后进行性能测试。
二、性能测试
拉伸性能测试方法:将制得的聚氨酯薄膜,用哑铃型裁刀切成约80mm×15mm×0.1mm,随后用Instron万能试验机在试温下以200mm/min的拉伸速度测试拉伸强度。
超薄产品拉伸回弹测试方法:在进行超薄产品拉伸回弹测试前,条状样品的初如长度为L1,然后施加压力,使该样品在15分钟内持续地缓慢地纵向伸展至其未伸展长度的3倍,然后立即撤除应力,30分钟后进行测量,所测量样品的长度为L2。样品的永久变形率等于(L2-L1)/L1。
表1展示了本发明的7个聚氨酯泡棉组合物和对比例5个实施例聚氨酯泡棉组合物制备的聚氨酯薄膜的性能测试结果。
表1对比例1~5和实施例1~7的性能测试结果
组别 | 拉伸强度MPA | 断裂伸长率 | 永久变形率 |
对比例1 | 5.4 | 152% | - |
对比例2 | 6.2 | 175% | - |
对比例3 | 5.8 | 158% | - |
对比例4 | 8.4 | 318% | 56% |
对比例5 | 9.3 | 358% | 34% |
实施例1 | 13.8 | 539% | 小于2% |
实施例2 | 12.9 | 522% | 小于2% |
实施例3 | 14.3 | 583% | 小于2% |
实施例4 | 14.8 | 536% | 小于2% |
实施例5 | 13.1 | 496% | 小于2% |
实施例6 | 15.2 | 598% | 小于2% |
实施例7 | 15.4 | 562% | 小于2% |
从表1的实验结果可以得出,采用本发明配方制备的聚氨酯薄膜(厚度0.1mm)拉伸强度大、断裂伸长率大、且永久变形率小,不易发生形变和断裂,适合在电子产品中使用,能够延长电子产品的使用寿命。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以权利要求的保护范围为准。
Claims (10)
1.一种新型的聚氨酯泡棉组合物,其特征在于,包括A组分和B组分,其中,所述A组分为异氰酸酯,重量份数为100份;所述B组分为白料,其组分以及重量份配比如下:
多元醇组合物 75~110份;
聚二甲基硅氧烷 5~25份;
第一交联剂二丙二醇DPG 1~2份;
第二交联剂过氧化二异丙苯DCP 2~5份;
纳米矿晶 10~21份;
催化剂辛酸亚锡 0.3~1份;
发泡剂水 5~15份;
匀泡剂硅油 1~4份。
2.根据权利要求1所述的新型的聚氨酯泡棉组合物,其特征在于,所述异氰酸酯包括80~90wt%的二苯基甲烷二异氰酸酯和10~20wt%的甲苯二异氰酸酯。
3.根据权利要求1所述的新型的聚氨酯泡棉组合物,其特征在于,所述多元醇组合物包含羟值为150~300且官能度为3~8的聚醚多元醇和羟值为20~500且官能度为2~3的聚酯多元醇,其中所述聚醚多元醇的重量百分比为60~75%,所述聚酯多元醇的重量百分比为25~40%。
4.根据权利要求1所述的新型的聚氨酯泡棉组合物,其特征在于,所述纳米矿晶的粒径为20~50nm。
5.根据权利要求4所述的新型的聚氨酯泡棉组合物,其特征在于,所述第一交联剂、所述第二交联剂、所述纳米矿晶的重量比值为1:(2~5):(10~15)。
6.根据权利要求5所述的新型的聚氨酯泡棉组合物,其特征在于,所述第二交联剂和所述发泡剂水的重量比值为1:(2~5)。
7.根据权利要求1至6任一项所述的新型的聚氨酯泡棉组合物,其特征在于,所述聚氨酯泡棉组合物还包括以下材料的一种或其任意组合:阻燃剂、颜料、防老化剂。
8.根据权利要求7所述的新型的聚氨酯泡棉组合物,其特征在于,所述阻燃剂为磷酸三(1-氯-乙丙基)酯TCPP。
9.根据权利要求7所述的新型的聚氨酯泡棉组合物,其特征在于,所述颜料为黑色颜料。
10.根据权利要求7所述的新型的聚氨酯泡棉组合物,其特征在于,所述防老化剂包括紫外线吸收剂和受阻胺光稳定的抗氧化剂。
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