原材料对聚氨酯硬泡抗压性能的影响

Effect of raw materials on the compressive properties of rigid polyurethane foam

以环氧丙烷聚醚多元醇、苯酐聚酯多元醇、多苯基甲烷多异氰酸酯PM-200、发泡剂一氟二氯乙烷(HCFC-141b)、泡沫稳定剂硅油AK-8801等为主要原料,采用一步法合成了聚氨酯硬泡,考察了不同种类多元醇及其配比、发泡剂、泡沫稳定剂种类及用量等对聚氨酯硬泡抗压性能的影响。结果表明:高羟值、高官能度的环氧丙烷聚醚多元醇可提高泡沫的压缩强度,且当环氧丙烷聚醚多元醇4110为100份,并加入20份左右苯酐聚酯多元醇580及10份左右聚醚403,泡沫稳定剂用量1～2份,发泡剂水用量0.5～1份,HCFC-141b用量30～35份,催化剂用量0.5～1.5份时,所得聚氨酯硬泡性能较好。

The polyurethane rigid foam was prepared by one step method using propylene oxide polyether polyol,polyester polyol of phthalic anhydride,multi-diphenylmethane diisocyanate PM-200,foaming agents 1,1-dichloro-1-fluoroethane（HCFC-141b） and foam stabilizer silicon oil AK-8801 as main raw materials.The effect of different polyols and their mass ratio,types and contents of blowing agent and foam stabilizer on the compressive properties of rigid polyurethane foam were investigated.The results showed that the high hydroxyl value and high functionality of propylene oxide polyether polyol could improve the compressive strength of the material.The polyurethane foam had good performance with parts by weight as follows：propylene oxide polyether polyols 4110 100,phthalic anhydride polyester polyol 580 20,polyether 403 10,foam stabilizer 1 ～ 2,foaming agents water 0.5 ～ 1,HCFC-141b 30 ～ 35 and catalyst 0.5 ～ 1.5.