HFC-365mfc/227ea替代HCFC-141b在硬质聚氨酯泡沫喷涂中的应用  

Application of HFC-365mfc/227ea Instead of HCFC-141b in Rigid Polyurethane Foam Spray

作　　者：闫红英 鹿毅力 杨瑾 杨斌[2] 赵义秋 YAN Hongying;LU Yii;YANG Jin;YANG Bin;ZHAO Yiqiu(Military Accessories Department,Xi'an Carbon Materials Co.,Ltd.;Laboratory of Resin-Based Thermal Insulation Materials,Xi'an Institute of Aerospace Composites,Xi'an,Shaanxi Province,710025 China)

机构地区：[1]西安康本材料有限公司军品配套事业部 [2]西安航天复合材料研究所树脂基绝热材料研究室,陕西西安710025

出　　处：《科技资讯》2024年第8期116-119,共4页Science & Technology Information

摘　　要：以HFC-365mfc/227ea混合发泡剂替代HCFC-141b,采用喷涂工艺进行低密度硬质聚氨酯泡沫外绝热防护层的生产,对发泡剂用量、泡沫性能、泡沫尺寸稳定性等进行了研究。结果表明:当泡沫的密度、机械强度和导热系数满足外绝热防护层技术要求时,HFC-365mfc/227ea混合发泡剂用量为38~44 g;采用HFC-365mfc/227ea混合发泡剂制备的泡沫密度与HCFC-141b相近时,发泡剂用量比HCFC-141b多25%左右,泡沫的压缩强度和模量高15%、剪切强度和模量比HCFC-141b高50%,导热系数低10%。在不超过80℃的使用温度范围内,HFC-365mfc/227ea混合发泡剂制备的泡沫具有良好的尺寸稳定性,尺寸变化率不超过1%。This paper uses the HFC-365mfc/227ea mixed foaming agent to replace HCFC-141b,produces a low-density external adiabatic protective layer of rigid polyurethane foam by spraying technology,and studies the dosage of the foaming agent,foam performance and foam dimension stability.The results are as follows.When the density,me-chanical strength and thermal conductivity of foam meet the technical requirements of the outer adiabatic protective layer,the dosage of the HFC-365mfc/227ea mixed foaming agent is 38~44 g.When the density of the foam prepared by the HFC-365mfc/227ea mixed foaming agent is similar to that of HCFC-141b,the dosage of the foaming agent is about 25%higher than that of HCFC-141b,with the compressive strength and modulus of the foam 15%higher than those of HCFC-141b,its shear strength and modulus 50%higher,and its thermal conductivity 10%lower.The foam prepared by the HFC-365mfc/227ea mixed foaming agent has good dimensional stability and the dimensional change rate does not exceed 1%in the service temperature temperature range of no more than 80℃.

关 键 词：HFC-365mfc/227ea HCFC-141B 硬质聚氨酯泡沫 发泡剂 喷涂 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]