CN106220825A - 冷藏车用聚氨酯大块泡保温材料及其制备方法 - Google Patents

冷藏车用聚氨酯大块泡保温材料及其制备方法 Download PDF

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CN106220825A
CN106220825A CN201610628662.2A CN201610628662A CN106220825A CN 106220825 A CN106220825 A CN 106220825A CN 201610628662 A CN201610628662 A CN 201610628662A CN 106220825 A CN106220825 A CN 106220825A
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insulation material
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徐业峰
念以亭
李明友
朱文静
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Shandong Inov New Material Co Ltd
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Abstract

本发明属于聚氨酯泡沫塑料技术领域,具体涉及一种冷藏车用聚氨酯大块泡保温材料及其制备方法。该保温材料由A组份和B组份构成,其中A组份由以下重量份数的组份组成:聚醚多元醇A:40‑50、聚醚多元醇B:25‑35、聚醚多元醇C:10‑15、聚酯多元醇D:10‑15、泡沫稳定剂:2.0‑4.0、化学发泡剂:1.0‑3.0、催化剂:1.5‑3.5、物理发泡剂25‑35。B组份为聚合二苯基甲烷二异氰酸酯。本发明的保温材料具有更低的注料整体密度及更好的密度分布,同时具有较好的压缩强度及更稳定细腻的泡孔结构,避免了常规大块泡体系在低密度情况下的穿孔及内部缺陷等问题。

Description

冷藏车用聚氨酯大块泡保温材料及其制备方法
技术领域
本发明属于聚氨酯泡沫材料技术领域,具体涉及一种冷藏车用聚氨酯大块泡保温材料及其制备方法。
背景技术
随着社会经济的快速发展和人民生活水平的不断提高,人们对食品的保鲜要求也越来越高,对冷藏食品的需求不断增多,冷链物流应运而生。冷藏保温车主要用于生鲜农副产品和食品饮料的储运,由于其具有冷藏、保温的特殊功能,能满足生鲜食品冷藏运输中的保鲜和冷冻要求,使其在冷链物流中起着重要的作用,成为冷链物流中的非常重要的一个环节。据公安部全国机动车上牌数据,2015年我国累计完成冷藏车销售17452辆,与2014年的15916辆相比,上升9.65%。
现阶段冷藏车一般采用全封闭聚氨酯板块粘结玻璃钢结构。内外蒙皮均采用不需打磨喷漆处理的玻璃钢板,内衬为硬质聚氨酯隔热材料、玻璃纤维和金属加强筋,用不饱和聚酯树脂作粘结剂,另加垫层,保温材料用硬质聚氨酯泡沫,导热系数低,强度高,板块粘结用高强度、高密封性胶合剂,形成一个整体。这种结构的冷藏车在国内外市场占主导地位,也是我国冷藏车制造企业所使用的工艺。其中的硬质聚氨酯板块隔热材料就是用大块泡按照需要的尺寸进行切割而来的,现在一般厂家生产的大块泡由于需要达到较高的压缩强度和较好的高低温尺寸稳定性,注料整体密度较高,整个泡沫上下密度差别较大且顶部泡沫容易出现偏软收缩变形的现象,同时泡孔粗大内部缺陷较多,导致保温效果严重下降。因此开发一种低密度、高强度及具有较好保温效果的聚氨酯大块泡产品显得尤为必要。
发明内容
本发明的目的是提供一种冷藏车用聚氨酯大块泡保温材料,有效降低了聚氨酯大块泡的整体密度及上下层的密度分布差,且具有较高的压缩强度及稳定细腻的泡孔结构,避免穿孔及内部缺陷问题,保温效果好,环境友好,能够满足长期低温冷藏运输条件下使用;本发明同时提供其制备方法。
本发明所述的冷藏车用聚氨酯大块泡保温材料,由A组份和B组份构成,A组份与B组份的重量比为1:1.0-1.2,其中:
A组份为,以重量份数计:
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5-6官能度,羟值为440±20mgKOH/g的聚醚多元醇;
所述聚醚多元醇B为4-5官能度,羟值为450±20mgKOH/g的聚醚多元醇;
所述聚醚多元醇C为3-4官能度,羟值为440±20mgKOH/g的聚醚多元醇;
所述聚醚多元醇D为3-4官能度,羟值为380±20mgKOH/g的聚醚多元醇;
B组份为:
聚合二苯基甲烷二异氰酸酯。
其中:
所述聚醚多元醇A优选YNW-5112,生产厂家为山东一诺威新材料有限公司;聚醚多元醇B优选YNW-8110,生产厂家为山东一诺威新材料有限公司;聚醚多元醇C优选YNW-5110,生产厂家为山东一诺威新材料有限公司;聚醚多元醇D优选YNW-3001,生产厂家为山东一诺威新材料有限公司。
所述的泡沫稳定剂为硅油B8534,生产厂家为赢创德固赛特种化学有限公司。
所述化学发泡剂为水。
所述催化剂为N,N-二甲基乙醇胺(DMEA)、N,N-二甲基苄胺(Y-27)、三乙烯二胺(A-33)和TMR-36(美国空气化工公司)的组合物,四者的质量比为0.2-0.8:0.5-1.5:0.1-0.5:0.3-0.5。
所述物理发泡剂为HCFC-141b,生产厂家为浙江三美化工股份有限公司。
所述的冷藏车用聚氨酯大块泡保温材料的制备方法,包括以下步骤:
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加入反应釜中搅拌,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,在常温下搅拌1.0-1.5小时,得到A组份;
使用时,将A组份与B组份按照重量比1:1.0-1.2混合均匀进行反应,制备出冷藏车用聚氨酯大块泡保温材料。
本发明使用的主体聚醚多元醇均为我公司自主研发生产的,高官能度的聚醚多元醇YNW-5112及YNW-8110保证泡沫体系在较低密度情况下具有较好的强度及尺寸稳定性,YNW-5110具有细化泡孔及增加体系互溶性的作用,增加黑白料反应的乳化性能,反应更加充分,体系流动性更好,更有利于泡沫的填充,低羟值低粘度的聚醚多元醇YNW-3001具有内部反应温度低、释放热量小的特点,这有利于减少泡沫体系的气泡穿孔及内部缺陷、开裂等问题,使泡沫具有更好的保温效果及抗拉强度。
本发明使用的泡沫稳定剂B8534,特别适用于大体积尺寸泡沫的填充,保证泡沫填充及强度的情况下有效降低注料密度。
本发明使用的复合催化体系在平衡泡沫的起发及凝胶时间方面至关重要,由于大块泡体积尺寸的特殊性,需要适当的起发时间及后期泡沫泡孔结构稳定的凝胶时间,使用DMEA催化剂有助于平衡起发时间,Y-27催化剂对泡沫的表面熟化有较大作用,有利于泡沫表皮熟化,而A-33强凝胶性催化剂及后固化催化剂TMR-36有助于后期泡孔结构的稳定形成,增加泡沫强度及闭孔率,提高保温性能。
与现有技术相比,本发明具有如下有益效果:
本发明制备的低密度冷藏车用聚氨酯大块泡保温材料,有效降低了聚氨酯大块泡的整体密度及上下层的密度分布差,具有较高的压缩强度。在保证泡沫填充及泡沫强度的前提下能有效降低注料量5-10%,同时泡孔细腻化,避免了一般大块泡体系在低密度情况下的穿孔及内部缺陷问题,保温效果更好,能够在长期低温冷藏运输条件下使用。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
以下结合实施例对本发明作进一步说明。
实施例1
所述的冷藏车用聚氨酯大块泡保温材料,由A组份和B组份构成,A组份与B组份的重量比为1:1.0,其中:
A组份为,以重量份数计:
制备时,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加入反应釜中搅拌,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,在常温下搅拌1.0小时,得到A组份;将A组份与异氰酸酯(PM200)按照重量比1:1.0混合均匀进行反应,制备出低密度冷藏车用聚氨酯大块泡保温材料。
具体指标如下:
尺寸稳定性
-30℃,24h: -0.11%
100℃,24h: 0.23%
闭孔率 94.1%
实施例2
所述的冷藏车用聚氨酯大块泡保温材料,由A组份和B组份构成,A组份与B组份的重量比为1:1.1,其中:
A组份为,以重量份数计:
制备时,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加入反应釜中搅拌,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,在常温下搅拌1.5小时,得到A组份;将A组份与异氰酸酯(M20S)按照重量比1:1.1混合均匀进行反应,制备出低密度冷藏车用聚氨酯大块泡保温材料。
具体指标如下:
尺寸稳定性
-30℃,24h: -0.17%
100℃,24h: 0.26%
闭孔率 95.2%
实施例3
所述的冷藏车用聚氨酯大块泡保温材料,由A组份和B组份构成,A组份与B组份的重量比为1:1.2,其中:
A组份为,以重量份数计:
制备时,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加入反应釜中搅拌,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,在常温下搅拌1.0小时,得到A组份;将A组份与异氰酸酯(M20S)按照重量比1:1.2混合均匀进行反应,制备出低密度冷藏车用聚氨酯大块泡保温材料。
具体指标如下:
尺寸稳定性
-30℃,24h: -0.09%
100℃,24h: 0.31%
闭孔率 96.1%
实施例4
所述的冷藏车用聚氨酯大块泡保温材料,由A组份和B组份构成,A组份与B组份的重量比为1:1.1,其中:
A组份为,以重量份数计:
制备时,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加入反应釜中搅拌,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,在常温下搅拌1.0小时,得到A组份;将A组份与异氰酸酯(M20S)按照重量比1:1.1混合均匀进行反应,制备出低密度冷藏车用聚氨酯大块泡保温材料。
具体指标如下:
尺寸稳定性
-30℃,24h: -0.12%
100℃,24h: 0.29%
闭孔率 95.1%
与常规大块泡体系相比,本发明泡沫性能如下表1所示:
表1性能数据表
本发明体系 常规体系
模塑芯密度kg/m3 34-36 37-39
导热系数W/m·K 0.0190-0.0198 0.0195-0.0210
压缩强度kPa 230-250 240-260
拉拔强度kPa 260-290 270-300
低温稳定性% ≤0.5 ≤1.0
高温稳定性% ≤1.0 ≤1.5
闭孔率% ≥94 ≥92

Claims (7)

1.一种冷藏车用聚氨酯大块泡保温材料,其特征在于由A组份和B组份构成,A组份与B组份的重量比为1:1.0-1.2,其中:
A组份为,以重量份数计:
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5-6官能度,羟值为440±20mgKOH/g的聚醚多元醇;
所述聚醚多元醇B为4-5官能度,羟值为450±20mgKOH/g的聚醚多元醇;
所述聚醚多元醇C为3-4官能度,羟值为440±20mgKOH/g的聚醚多元醇;
所述聚醚多元醇D为3-4官能度,羟值为380±20mgKOH/g的聚醚多元醇;
B组份为:
聚合二苯基甲烷二异氰酸酯。
2.根据权利要求1所述的冷藏车用聚氨酯大块泡保温材料,其特征在于:所述泡沫稳定剂为B8534。
3.根据权利要求1所述的冷藏车用聚氨酯大块泡保温材料,其特征在于:所述化学发泡剂为水。
4.根据权利要求1所述的冷藏车用聚氨酯大块泡保温材料,其特征在于:所述催化剂为N,N-二甲基乙醇胺、N,N-二甲基苄胺、三乙烯二胺和TMR-36的组合物。
5.根据权利要求4所述的冷藏车用聚氨酯大块泡保温材料,其特征在于:N,N-二甲基乙醇胺、N,N-二甲基苄胺、三乙烯二胺和TMR-36四者的质量比0.2-0.8:0.5-1.5:0.1-0.5:0.3-0.5。
6.根据权利要求1所述的冷藏车用聚氨酯大块泡保温材料,其特征在于:所述物理发泡剂为HCFC-141b。
7.一种权利要求1-6任一所述的冷藏车用聚氨酯大块泡保温材料的制备方法,其特征在于包括以下步骤:
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加入反应釜中搅拌,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,在常温下搅拌1.0-1.5小时,得到A组份;
使用时,将A组份与B组份按照重量比1:1.0-1.2混合均匀进行反应,制备出冷藏车用聚氨酯大块泡保温材料。
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CN107118320A (zh) * 2017-06-28 2017-09-01 山东诺威新材料有限公司 食品/药品保温箱用聚氨酯保温材料及其制备方法
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CN112708093A (zh) * 2020-12-28 2021-04-27 上海东大聚氨酯有限公司 板材用聚氨酯原料组合物、聚氨酯保温材料及其制备方法
CN112708093B (zh) * 2020-12-28 2023-06-09 上海东大聚氨酯有限公司 板材用聚氨酯原料组合物、聚氨酯保温材料及其制备方法

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