CN104448222A - 超薄冰箱冷柜用低导型聚氨酯保温材料及其制备方法 - Google Patents
超薄冰箱冷柜用低导型聚氨酯保温材料及其制备方法 Download PDFInfo
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Abstract
本发明属于聚氨酯泡沫塑料领域,具体涉及一种超薄冰箱冷柜用低导型聚氨酯保温材料及其制备方法。所述的低导型聚氨酯保温材料由A组分和B组分组成,A组分与B组分的重量比为1:1.05-1.25,其中A组分由聚醚多元醇A、聚醚多元醇B、聚醚多元醇C、聚醚多元醇D、泡沫稳定剂、化学发泡剂、催化剂、物理发泡剂组成;B组分为聚合二苯基甲烷二异氰酸酯。所述的低导型聚氨酯保温材料,具有导热系数低、尺寸稳定性好、流动性好、粘结力强等特点,同时该聚氨酯保温材料泡沫的泡孔结构微细化,可有效降低保温层泡沫的厚度;本发明的制备方法,工艺简单,易操作。
Description
技术领域
本发明属于聚氨酯泡沫塑料领域,具体涉及一种超薄冰箱冷柜用低导型聚氨酯保温材料及其制备方法。
背景技术
聚氨酯泡沫是目前所有隔热保温材料中的领导者,广泛用于冰箱冰柜、太阳能热水器、管道建筑保温、冷库板、交通运输、航空军用等诸多绝热保温领域。由于能源价格不断上涨,家电节能的呼声越来越高,而且现今冰箱或冷柜保温层厚度约在50-70mm之间,为达到很好的保温效果,厚度甚至高达100mm以上,此种冰箱、冷柜产品体积大,比较笨重,设想将硬质聚氨酯泡沫的泡孔微细化制得一种微孔泡沫塑料,用此种泡沫作为冰箱或冷柜产品的保温层,要达到同样的保温效果,泡沫保温层厚度可有效降低。聚氨酯硬泡作为冰箱冷柜的隔热保温材料,是直接影响冰箱冷柜重要使用性能指标的关键原料之一,对单台冰箱的生产效率、电能消耗起到举足轻重的作用,因此降低聚氨酯泡沫塑料的导热系数及保温层厚度是未来家电行业的一个重要发展趋势。聚氨酯硬质泡沫的导热系数、泡沫孔径及其结构与所使用的聚醚体系、催化体系等均有很大关系,例如不同起始剂聚醚体系的选择与搭配、发泡反应和凝胶反应催化剂的合理选择及其用量的协调搭配等,都会对聚氨酯硬质泡沫的孔径大小和泡孔结构造成影响。
发明内容
针对现有技术的不足,本发明的目的是提供一种超薄冰箱冷柜用低导型聚氨酯保温材料,具有导热系数低、流动性好、粘结力强的特点;本发明同时提供其制备方法。
本发明所述的超薄冰箱冷柜用低导型聚氨酯保温材料,由A组分和B组分构成,A组分与B组分的重量比为1:1.05-1.25,其中,
A组分为,以重量份数计:
其中,物理发泡剂为环戊烷(韩国LG公司)与HFC-245fa(美国的霍尼韦尔公司)的混合发泡体系,环戊烷与HFC-245fa的质量比为65-75:25-35;
聚醚多元醇A、聚醚多元醇B、聚醚多元醇C和聚醚多元醇D四种原料总重量份数为100份;
所述聚醚多元醇A为4-5官能度,羟值为430±10mgKOH/g的聚醚多元醇;
所述聚醚多元醇B为4-5官能度,羟值为425±25mgKOH/g的聚醚多元醇;
所述聚醚多元醇C为4官能度,羟值为770±35mgKOH/g的聚醚多元醇;
所述聚醚多元醇D为3官能度,羟值为168±5mgKOH/g的聚醚多元醇;
B组分为:
聚合二苯基甲烷二异氰酸酯,优选PM200(烟台万华聚氨酯股份有限公司)或者M20S(巴斯夫公司)。
其中,
聚醚多元醇A优选YNW-5114(山东一诺威新材料有限公司);聚醚多元醇B优选YNW-5110(山东一诺威新材料有限公司);聚醚多元醇C优选NT-403A(山东蓝星东大化工有限责任公司);聚醚多元醇D优选NJ-310(句容宁武新材料发展有限公司)。
泡沫稳定剂为Niax*硅L-6866(美国迈图高新材料公司)。
化学发泡剂为水。
催化剂为五甲基二亚乙基三胺、三乙烯二胺和2,4,6-三(二甲氨基甲基)苯酚三者的复配体系,五甲基二亚乙基三胺、三乙烯二胺和2,4,6-三(二甲氨基甲基)苯酚的质量比为0.2-0.4:0.5-1.5:0.5-1.5。其中,五甲基二亚乙基三胺优选PC5(美国空气化工公司)、三乙烯二胺优选A-33、2,4,6-三(二甲氨基甲基)苯酚优选Dabco TMR-30(美国空气化工公司)。
所述的超薄冰箱冷柜用低导型聚氨酯保温材料的制备方法,包括以下步骤:
首先,将称量好的聚醚多元醇A、聚醚多元醇B、聚醚多元醇C和聚醚多元醇D搅拌均匀,然后加入称量好的泡沫稳定剂、催化剂、化学发泡剂、物理发泡剂,常温下搅拌1.0-1.5h,得到A组分;
将A组分与B组分按照重量比1:1.05-1.25混合均匀,制备出超薄冰箱冷柜用低导型聚氨酯保温材料。
本发明采用环戊烷与新型低导发泡剂HFC-245fa的混合物作为物理发泡剂,低导硅油L-6866作为泡沫稳定剂,有效降低了聚氨酯泡沫的导热系数,采用复合聚醚体系的协调搭配,同时选择合适的催化剂及用量进行细化泡孔,协调发泡速度和凝胶速度阻止泡孔的过度长大和并泡,形成具有微细化泡孔结构的泡沫塑料,有效降低了保温层的泡沫厚度。
有现有技术相比,本发明具有以下有益效果:
(1)本发明制备的聚氨酯硬质泡沫保温材料,泡沫的导热系数在18.5-19.0mW/m·K范围,有效降低了冰箱冷柜产品长期使用过程中的能耗问题,节约了能源,同时泡孔结构微细化可使保温层厚度有效降低;
(2)泡沫密度与纯环戊烷体系相比,抗压强度更高、耐低温尺寸稳定性更好,可降低泡沫整体密度5-10%;
(3)本发明生成的泡沫体系自身具有较高的强度与韧性,与冷柜箱体的粘结强度较高,不会出现脱壳分层问题,泡沫的尺寸稳定性和流动性好,可满足长期低温条件下的使用要求;
(4)本发明制备方法简便、易操作,生产过程无三废污染,安全环保。
具体实施方式
下面结合实施例对本发明做进一步说明。
实施例中用到的所有原料除特殊说明外,均为市购。
实施例1
超薄冰箱冷柜用低导型聚氨酯保温材料由A组分和B组分组成,A组分与B组分的重量比为1:1.15,其中:
A组分为,以重量份数计:
将称量好的YNW-5114、YNW-5110、NT-403A和NJ310加入反应釜中搅拌均匀,然后加入称量好的其它组分,常温下搅拌1.0h,得到A组分;将A组分与异氰酸酯(PM200)混合均匀,得到超薄冰箱冷柜用低导型聚氨酯保温材料。具体指标如下:
模塑芯密度 33.0kg/m3
导热系数 18.7mW/m·K
压缩强度 189.3kPa
尺寸稳定性
实施例2
超薄冰箱冷柜用低导型聚氨酯保温材料由A组分和B组分组成,A组分与B组分的重量比为1:1.05,其中:
A组分为,以重量份数计:
将称量好的YNW-5114、YNW-5110、NT-403A和NJ310加入反应釜中搅拌均匀,然后加入称量好的其它组分,常温下搅拌1.2h,得到A组分;将A组分与异氰酸酯(PM200)混合均匀,得到超薄冰箱冷柜用低导型聚氨酯保温材料。具体指标如下:
模塑芯密度 32.5kg/m3
导热系数 18.5mW/m·K
压缩强度 183.7kPa
尺寸稳定性
实施例3
超薄冰箱冷柜用低导型聚氨酯保温材料由A组分和B组分组成,A组分与B组分的重量比为1:1.2,其中:
A组分为,以重量份数计:
将称量好的YNW-5114、YNW-5110、NT-403A和NJ310加入反应釜中搅拌均匀,然后加入称量好的其它组分,常温下搅拌1.3h,得到A组分;将A组分与异氰酸酯(PM200)混合均匀,得到超薄冰箱冷柜用低导型聚氨酯保温材料。具体指标如下:
模塑芯密度 33.2kg/m3
导热系数 18.9mW/m·K
压缩强度 192.1kPa
尺寸稳定性
实施例4
超薄冰箱冷柜用低导型聚氨酯保温材料由A组分和B组分组成,A组分与B组分的重量比为1:1.25,其中:
A组分为,以重量份数计:
将称量好的YNW-5114、YNW-5110、NT-403A和NJ310加入反应釜中搅拌均匀,然后加入称量好的其它组分,常温下搅拌1.5h,得到A组分;将A组分与异氰酸酯(PM200)混合均匀,得到超薄冰箱冷柜用低导型聚氨酯保温材料。具体指标如下:
模塑芯密度 33.5kg/m3
导热系数 18.6mW/m·K
压缩强度 195.7kPa
尺寸稳定性
Claims (6)
1.一种超薄冰箱冷柜用低导型聚氨酯保温材料,其特征在于:由A组分和B组分组成,A组分与B组分的重量比为1:1.05-1.25,其中,
A组分为,以重量份数计:
其中,物理发泡剂为环戊烷与HFC-245fa的混合发泡体系,环戊烷与HFC-245fa的质量比为65-75:25-35;
聚醚多元醇A、聚醚多元醇B、聚醚多元醇C和聚醚多元醇D四种原料总重量份数为100份;
聚醚多元醇A为4-5官能度,羟值为430±10mgKOH/g的聚醚多元醇;
聚醚多元醇B为4-5官能度,羟值为425±25mgKOH/g的聚醚多元醇;
聚醚多元醇C为4官能度,羟值为770±35mgKOH/g的聚醚多元醇;
聚醚多元醇D为3官能度,羟值为168±5mgKOH/g的聚醚多元醇;
B组分为:
聚合二苯基甲烷二异氰酸酯。
2.根据权利要求1所述的超薄冰箱冷柜用低导型聚氨酯保温材料,其特征在于:泡沫稳定剂为Niax*硅L-6866。
3.根据权利要求1所述的超薄冰箱冷柜用低导型聚氨酯保温材料,其特征在于:化学发泡剂为水。
4.根据权利要求1所述的超薄冰箱冷柜用低导型聚氨酯保温材料,其特征在于:催化剂为五甲基二亚乙基三胺、三乙烯二胺和2,4,6-三(二甲氨基甲基)苯酚三者的复配体系,五甲基二亚乙基三胺、三乙烯二胺和2,4,6-三(二甲氨基甲基)苯酚的质量比为0.2-0.4:0.5-1.5:0.5-1.5。
5.根据权利要求4所述的超薄冰箱冷柜用低导型聚氨酯保温材料,其特征在于:五甲基二亚乙基三胺为PC5;三乙烯二胺为A-33;2,4,6-三(二甲氨基甲基)苯酚为Dabco TMR-30。
6.一种权利要求1-5任一所述的超薄冰箱冷柜用低导型聚氨酯保温材料的制备方法,其特征在于:包括以下步骤:
首先,将称量好的聚醚多元醇A、聚醚多元醇B、聚醚多元醇C和聚醚多元醇D搅拌均匀,然后加入称量好的泡沫稳定剂、催化剂、化学发泡剂、物理发泡剂,常温下搅拌1.0-1.5h,得到A组分;
将A组分与B组分按照重量比1:1.05-1.25混合均匀,制备出超薄冰箱冷柜用低导型聚氨酯保温材料。
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