CN113292700A - 废旧聚氨酯回收制备聚氨酯保温材料的方法 - Google Patents

废旧聚氨酯回收制备聚氨酯保温材料的方法 Download PDF

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CN113292700A
CN113292700A CN202110774235.6A CN202110774235A CN113292700A CN 113292700 A CN113292700 A CN 113292700A CN 202110774235 A CN202110774235 A CN 202110774235A CN 113292700 A CN113292700 A CN 113292700A
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polyurethane
degradation product
mixing
waste
thermal insulation
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CN113292700B (zh
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顾晓华
王肖尧
刘思雯
陈泓宇
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Zibo Huashiyuan Environmental Protection Technology Co ltd
Donghua University
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Zibo Huashiyuan Environmental Protection Technology Co ltd
Donghua University
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Abstract

本发明涉及废旧聚氨酯回收技术领域，具体涉及一种废旧聚氨酯回收制备聚氨酯保温材料的方法。所述的废旧聚氨酯回收制备聚氨酯保温材料的方法，将废旧聚氨酯硬质泡沫与醇解剂、助醇解剂、改性剂混合反应，得到降解产物A；将废旧聚氨酯弹性体与醇解剂、助醇解剂、改性剂混合反应，得到降解产物B；将降解产物A和降解产物B混合作为降解产物C；将降解产物C与发泡剂、催化剂、稳定剂混合均匀后作为A组分，B组分为异氰酸酯，将A组分和B组分混合搅拌发泡，即得到聚氨酯保温材料。本发明以废旧聚氨酯的降解产物为主要原料制备聚氨酯保温材料，废弃物达到了百分百利用，制备的聚氨酯保温材料性能良好，符合国家标准和行业要求。

Description

废旧聚氨酯回收制备聚氨酯保温材料的方法
技术领域
本发明涉及废旧聚氨酯回收技术领域，具体涉及一种废旧聚氨酯回收制备聚氨酯保温材料的方法。
背景技术
聚氨酯材料作为一种性能较优越的高分子材料在各行各业中被广泛应用，与此同时聚氨酯废弃物的数量也在日渐增多，废旧聚氨酯制品在我国属于大量堆积的废弃物，不溶不熔，在自然界很难降解，难于处理，严重污染环境，对于其废弃物，现阶段一般采取填埋或焚烧的方法进行处理，这样不但浪费了大量的工业资源，而且会造成土地浪费和空气污染。我国现今的聚氨酯产业链尚不完善，使得其发展受到一定的制约，更加严重的是到目前还没有相应成熟的高新技术使得聚氨酯产业链中废旧聚氨酯制品从下游产品经过处理再应用于聚氨酯原料的再生产。
目前，对聚氨酯废弃物进行合理回收再利用，成为了当前聚氨酯工业发展的重大研究热点。专利CN202010892951.X中公开了一种聚氨酯泡沫降解回收后亲水改性制备水性聚氨酯的方法，先将聚氨酯泡沫的降解剂和亲水改性功能单体投入反应釜，升温至80-200℃；再将回收的废旧聚氨酯泡沫碎块加入反应釜中降解，至块状的聚氨酯泡沫消失为止；然后加入水性润湿分散剂与蒸馏水乳化，所得乳化液减压蒸馏后再添加蒸馏水得固含量30-50％的水性聚氨酯乳液产品。本发明在聚氨酯降解回收过程中引入亲水性功能单体，亲水性功能单体作为聚氨酯泡沫降解的组分之一，在引入后将有效提高聚氨酯泡沫降解产物的亲水性，具备反应效率高、亲水改性功能好等特点。此方法降解产品不具备增强效果而导致泡沫性能较差，不能用于聚氨酯泡沫的应用。
专利CN201310094979.9公开了一种建筑用保温聚氨酯泡沫材料降解回收多元醇的方法，利用建筑用保温材料降解回收多元醇直接代替质量分数20-50％聚醚多元醇再生产聚氨酯泡沫。然而，该专利涉及到的回收降解产物需要增加中间的处理过程，提纯工艺，蒸馏处理，浪费能源，不能百分之百用于制备聚氨酯发泡材料中，有“三废”的排放、利用率低，具有二次废物排出造成污染，破坏了环境。
由于目前对于聚氨酯硬泡材料固体废弃物中含有大量的聚酯多元醇，带来回收再利用后产品性能的下降，我们因此提出了一种新的废旧聚氨酯泡沫回收制备聚氨酯保温材料的方法。
发明内容
本发明要解决的技术问题是提供一种废旧聚氨酯回收制备聚氨酯保温材料的方法，以废旧聚氨酯泡沫的降解产物为主要原料制备聚氨酯保温材料，克服了聚氨酯硬泡材料固体废弃物中含有大量的聚酯多元醇，带来回收再利用后产品性能的下降的缺点，使废弃物达到了百分之百的利用，减少了资源浪费，极大的降低了成本，达到了保护环境、绿色环保、循环经济的目的，而且制备的聚氨酯保温材料性能良好，符合国家标准要求。
本发明所述的废旧聚氨酯回收制备聚氨酯保温材料的方法，包括以下步骤：
(1)将废旧聚氨酯硬质泡沫与醇解剂、助醇解剂、改性剂混合，在110-170℃下进行降解反应1-5h，得到降解产物A；将废旧聚氨酯弹性体与醇解剂、助醇解剂、改性剂混合，在120-190℃下进行降解反应1-8h，得到降解产物B；将降解产物A和降解产物B混合作为降解产物C；
(2)将降解产物C与发泡剂、催化剂、稳定剂混合均匀后作为A组分，B组分为异氰酸酯，将A组分和B组分按质量比0.8-1:1-2.0混合搅拌发泡，即得到聚氨酯保温材料。
步骤(1)中，醇解剂、助醇解剂、改性剂的加入量分别为废旧聚氨酯硬质泡沫质量的10-120％、5-75％、1-15％。
废旧聚氨酯泡沫为聚氨酯保温泡沫材料的废料。
醇解剂、助醇解剂、改性剂的加入量分别为废旧聚氨酯弹性体质量的10-120％、5-25％、1-15％。
废旧聚氨酯弹性体为聚醚型弹性体。
降解产物A和降解产物B的混合质量比为0.7-1.5:0.5-1.3。
醇解剂为乙二醇、1,3-丁二醇、1,4-丁二醇、1,5-戊二醇、1,6-己二醇、1,8-辛二醇、1,9-壬二醇、1,3-丙二醇、二乙二醇、三乙二醇、三丙二醇、1,2-丙二醇、戊二醇、GR-635C、GR-4110A、GR-4110G、GR-450A、GR-649、PBA-1000、PEG-200、GR-8340A、GR-835G、GRA-6360、PEDA-1500中的一种或多种。
助醇解剂为二乙醇胺、三乙醇胺、单异丙醇胺、二异丙醇胺、三异丙醇胺、N,N-二甲基乙醇胺、N,N-二乙基乙醇胺、环己胺、叔胺中的一种或多种。
改性剂为接枝型聚醚多元醇改性剂或杂环型聚醚多元醇改性剂。
接枝型聚醚多元醇改性剂优选为甘油、马来酸酐、淀粉、壳聚糖中的一种或多种。
杂环型聚醚多元醇改性剂优选为环氧乙烷、环氧丙烷、环氧氯丙烷、莫卡、木质素的一种或多种。
步骤(3)中，发泡剂、催化剂、稳定剂的加入量分别为降解产物C质量的5-20％、0.5-10％、0.1-5％。
其中，发泡剂为HCFC-141b(一氟二氯乙烷)、HCFC-142b(二氯氟乙烷)、HCFC-123(1,1,1-三氟二氯乙烷)、HCFC-22(一氯二氟甲烷)、环戊烷、异戊烷、HFC-245fa、HFC-365mfc(1,1,1,3,3-五氟丁烷)、HFC-334a(1,1,1,2-四氟乙烷)、水中的一种或多种。
催化剂为三(二甲氨基丙基)六氢三嗪(PC-41)、二甲基乙醇胺、N,N,N′,N",N"-五甲基二乙烯三胺、三亚乙基二胺、环已胺、N,N-二甲基哌嗪、三乙烯二胺、二甲氨基乙基醚、五甲基二亚乙基三胺、2,2′-二吗啉二乙醚(DMDEE)、N,N-二甲基苄胺(BDMA)、N,N′,N"-四甲基-1,6己二胺(TMHDA)、甲基二乙醇胺、N,N,N′-三甲氨基乙基乙醇胺、三乙胺、1,2-二甲基咪唑、四甲基乙二胺、N,N-二甲基乙醇胺(DMEA)、N,N-二乙基乙醇胺、二甲氨基乙氧基乙醇、N,N,N′,N′-四甲基-1,3-丙胺(TMPDA)、1,3,5-三(二甲氨基丙基)六氢三嗪、有机锡催化剂中的一种或多种。
稳定剂为硅油L-600、硅油SE-232、硅油CGY-5、硅油DC-193、硅油SC-154、硅油SC-155、硅油SD-601、C12叔胺、十二/十四烷基二甲基叔胺、二甲基硅氧烷中的一种或多种。
异氰酸酯为二苯基甲烷二异氰酸酯(MDI)、甲苯二异氰酸酯(TDI)、六亚甲基二异氰酸酯(HDI)、多苯基多亚甲基多异氰酸酯(PAPI)中的一种。
二苯基甲烷二异氰酸酯(MDI)优选MDI-100LL、MDI-100HL、MR-200、M200、44V20，M20S，5005。
甲苯二异氰酸酯(TDI)优选TDI-80/20、TDI-100。
与现有技术相比，本发明有以下有益效果：
(1)本发明将废旧聚氨酯硬泡与废旧聚氨酯弹性体分别与接枝型或杂环型聚醚多元醇改性剂、醇解剂和助醇解剂混合，采用组合醇降解方法，接枝型或杂环型聚醚多元醇改性剂在降解过程中加入相应的添加剂以促进和增强其再生聚醚交联结构，同时聚氨酯弹性体为聚醚型弹性体，增加了降解产物中聚醚的组分的比例，在一定工艺条件下反应后得到自增强型降解产物，利用废旧聚氨酯泡沫的降解产物为原料，代替传统制备聚氨酯保温材料的原料，采用组合醇方法直接制备出满足要求的聚氨酯保温材料，生产工艺简单易操作，可投入生产；
(2)本发明降解得到的降解产物分子量分布较窄(分子量分布指数D＝M(w)/M(n)≈1.2～1.6)，各性能参数良好且符合标准；
(3)本发明将废旧聚氨酯经降解后，降解产物不需要进行任何中间处理，就可百分之百用于制备聚氨酯发泡材料中，减少“三废”的排放，极大的提高了降解料的回收利用率，降低了工艺生产成本和现有发泡材料产品成本，同时也降低了二次废物排出造成的环境影响，绿色环保、形成封闭式循环经济圈；
(4)本发明制备的聚氨酯保温材料保温性能优良、符合国家标准(如埋地钢质管道硬质聚氨酯泡沫塑料：表观密度40～60kg/m3，压缩强度≥0.2MPa，导热系数≤0.03W/m·K，吸水率≤4％)，本发明制备的聚氨酯产品表观密度：30～60kg/m3；压缩强度为0.34MPa左右，导热系数≤0.018W/m·K，闭孔率98％以上，吸水率≤2％，在达到国家标准及降低成本的基础上，极大的提高其性能指标。
具体实施方式
下面结合具体实施例，通过利用两种或两种以上的组合醇进行改性降解，并在降解过程中加入相应的改性剂以促进和增强其交联结构，针对本发明进一步阐述。
实施例1
(1)将废旧聚氨酯硬质泡沫、1,3-丙二醇、二乙醇胺按质量比50:40:10混合，并加入占废旧聚氨酯硬质泡沫质量4％的甘油，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、1,3-丙二醇、二乙醇胺按质量比50:40:10混合，并加入占废旧聚氨酯弹性体质量4％的甘油，在165℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比1:1混合作为降解产物C；
(2)将降解产物C与HCFC-141b、二甲基乙醇胺、硅油L-600按质量比15:2:1:0.7混合均匀后作为A组分，B组分为二苯基甲烷二异氰酸酯MDI-100LL，将A组分和B组分按质量比1:1混合搅拌15s进行发泡，得到聚氨酯保温材料。
实施例2
(1)将废旧聚氨酯硬质泡沫、1,3-丙二醇、三异丙醇胺按质量比50:35:10混合，并加入占废旧聚氨酯硬质泡沫质量4％的淀粉，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、1,3-丙二醇、二乙醇胺按质量比50:35:10混合，并加入占废旧聚氨酯弹性体质量4％的淀粉，在170℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比1.1:0.9混合作为降解产物C；
(2)将降解产物C与HCFC-141b、三亚乙基二胺、硅油SE-232按质量比15:2:1:0.7混合均匀后作为A组分，B组分为二苯基甲烷二异氰酸酯MR-200，将A组分和B组分按质量比0.9:1.1混合搅拌15s进行发泡，得到聚氨酯保温材料。
实施例3
将废旧聚氨酯硬质泡沫、乙二醇、三乙醇胺按质量比50:25:20混合，并加入占废旧聚氨酯硬质泡沫质量5％的马来酸酐，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、乙二醇、三乙醇胺按质量比50:25:20混合，并加入占废旧聚氨酯弹性体质量5％的马来酸酐，在155℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比1.2:0.8混合作为降解产物C；
(2)将降解产物C与环戊烷、环已胺、硅油CGY-5按质量比15:2:1:0.7混合均匀后作为A组分，B组分为二苯基甲烷二异氰酸酯M20S，将A组分和B组分按质量比1:1.3混合搅拌15s进行发泡，得到聚氨酯保温材料。
实施例4
(1)将废旧聚氨酯硬质泡沫、1,3-丙二醇、环己胺按质量比40:20:25混合，并加入占废旧聚氨酯硬质泡沫质量4.5％的壳聚糖，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、1,3-丙二醇、环己胺按质量比40:20:25混合，并加入占废旧聚氨酯弹性体质量4.5％的壳聚糖，在180℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比1.2:0.7混合得到降解产物C；
(2)将降解产物C与HFC-245fa、三乙烯二胺、硅油SD-601按质量比15:2:1:0.5混合均匀后作为A组分，B组分为甲苯二异氰酸酯TDI-80/20，将A组分和B组分按质量比1:1.1混合搅拌15s进行发泡，得到聚氨酯保温材料。
实施例5
(1)将废旧聚氨酯硬质泡沫、1,4-丁二醇、二乙醇胺按质量比50:15:35混合，并加入占废旧聚氨酯硬质泡沫质量4.5％的环氧丙烷，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、1,4-丁二醇、二乙醇胺按质量比50:15:35混合，并加入占废旧聚氨酯弹性体质量4.5％的环氧丙烷，在175℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比1.4:0.6混合得到降解产物C；
(2)将降解产物C与HFC-365mfc、二甲氨基乙基醚、C12叔胺按质量比12:2:1:0.6混合均匀后作为A组分，B组分为甲苯二异氰酸酯TDI-100，将A组分和B组分按质量比0.8:1.2混合搅拌15s进行发泡，得到聚氨酯保温材料。
实施例6
(1)将废旧聚氨酯硬质泡沫、乙二醇、二乙醇胺按质量比40:38:12混合，并加入占废旧聚氨酯硬质泡沫质量4.5％的莫卡，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、乙二醇、二乙醇胺按质量比40:38:12混合，并加入占废旧聚氨酯弹性体质量4.5％的莫卡，在175℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比1.5:0.5混合得到降解产物C；
(2)将降解产物C与N,N-偶氮二异丁腈、N,N-二甲基苄胺、十二/十四烷基二甲基叔胺按质量比14:2:1:0.7混合均匀后作为A组分，B组分为多苯基多亚甲基多异氰酸酯PAPI-27，将A组分和B组分按质量比1:1.4混合搅拌15s进行发泡，得到聚氨酯保温材料。
实施例7
(1)将废旧聚氨酯硬质泡沫、乙二醇、二异丙醇胺按质量比50:36:24混合，并加入占废旧聚氨酯泡沫质量5％的木质素，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、乙二醇、二异丙醇胺按质量比50:36:24混合，并加入占废旧聚氨酯弹性体质量5％的木质素，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比0.8:1.2混合得到降解产物C；
(2)将降解产物C与1,1-二氯-1-氟代乙烷、1,2-二甲基咪唑、硅油SC-154按质量比15:2:1:0.7混合均匀后作为A组分，B组分为多苯基多亚甲基多异氰酸酯PAPI-135C，将A组分和B组分按质量比1:1.5混合搅拌15s进行发泡，得到聚氨酯保温材料。
实施例8
(1)将废旧聚氨酯硬质泡沫、乙二醇、三乙醇胺按质量比50:15:35混合，并加入占废旧聚氨酯泡沫质量4％的环氧氯丙烷，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、乙二醇、三乙醇胺按质量比50:10:35混合，并加入占废旧聚氨酯弹性体质量4％的环氧氯丙烷，在180℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比0.9:1.1混合得到降解产物C；
(2)将降解产物C与水、有机锡催化剂、二甲基硅氧烷按质量比13:2:1:0.6混合均匀后作为A组分，B组分为六亚甲基二异氰酸酯HDI，将A组分和B组分按质量比1:1.6混合搅拌15s进行发泡，得到聚氨酯保温材料。
对比例1
(1)将废旧聚氨酯泡沫、1,3-丙二醇、二乙醇胺按质量比50:40:10混合，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、1,3-丙二醇、二乙醇胺按质量比50:40:10混合，在165℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比1:1混合得到降解产物C；
(2)将降解产物C与HCFC-141b、二甲基乙醇胺、硅油L-600按质量比15:2:1:0.7混合均匀后作为A组分，B组分为二苯基甲烷二异氰酸酯MDI-100LL，将A组分和B组分按质量比1:1混合搅拌15s进行发泡，得到聚氨酯保温材料。
对比例2
(1)将废旧聚氨酯硬质泡沫、1,3-丙二醇、三异丙醇胺按质量比50:35:10混合，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；将废旧聚氨酯弹性体、1,3-丙二醇、二乙醇胺按质量比50:35:10混合，在170℃下搅拌3h，完全降解后冷却至室温，得到降解产物B；然后将降解产物A和降解产物B按质量比1.1:0.9混合作为降解产物C；
(2)将降解产物C与HCFC-141b、三亚乙基二胺、硅油SE-232按质量比15:2:1:0.7混合均匀后作为A组分，B组分为二苯基甲烷二异氰酸酯MR-200，将A组分和B组分按质量比0.9:1.1混合搅拌15s进行发泡，得到聚氨酯保温材料。
对比例3
(1)将废旧聚氨酯硬质泡沫、乙二醇、三乙醇胺按质量比50:10:35混合，并加入占废旧聚氨酯泡沫质量4％的环氧氯丙烷，在150℃下搅拌3h，完全降解后冷却至室温，得到降解产物A；
(2)将降解产物A与水、有机锡催化剂、二甲基硅氧烷按质量比13:2:1:0.6混合均匀后作为A组分，B组分为六亚甲基二异氰酸酯HDI，将A组分和B组分按质量比1:1.6混合搅拌15s进行发泡，得到聚氨酯保温材料。
将实施例1-8和对比例1-3制备的降解产物和聚氨酯保温材料分别进行性能测试，其中泡沫密度参考GB/T6343进行测试，压缩强度参考GB/T8813进行测试，开孔率参考GB/T10799进行测试，导热系数参考GB/T3399进行测试。测试结果如表1所示。
表1实施例1-8和对比例1-3制备的降解产物和聚氨酯保温材料的性能测试结果
Figure BDA0003153868080000071
从表1可以看出，本发明的实施例1-8分别利用废旧聚氨酯硬质泡沫和废旧聚氨酯弹性体作为降解原料，在降解过程中加入醇解剂、助醇解剂和相应的接枝型和杂环改性型添加剂，得到的降解产物制备得到聚氨酯保温材料在压缩强度、吸水率、导热系数等性能均满足国标要求的前提下极大的提高了各项指标。

Claims (9)

1.一种废旧聚氨酯回收制备聚氨酯保温材料的方法，其特征在于：包括以下步骤：
(1)将废旧聚氨酯硬质泡沫与醇解剂、助醇解剂、改性剂混合，在110-170℃下进行降解反应1-5h，得到降解产物A；将废旧聚氨酯弹性体与醇解剂、助醇解剂、改性剂混合，在120-190℃下进行降解反应1-8h，得到降解产物B；将降解产物A和降解产物B混合作为降解产物C；
(2)将降解产物C与发泡剂、催化剂、稳定剂混合均匀后作为A组分，B组分为异氰酸酯，将A组分和B组分按质量比0.8-1:1-2.0混合搅拌发泡，即得到聚氨酯保温材料；
所述改性剂为接枝型聚醚多元醇改性剂或杂环型聚醚多元醇改性剂。
2.根据权利要求1所述的废旧聚氨酯回收制备聚氨酯保温材料的方法，其特征在于：步骤(1)中，醇解剂、助醇解剂、改性剂的加入量分别为废旧聚氨酯弹性体质量的10-120％、5-75％、1-15％。
3.根据权利要求1所述的废旧聚氨酯回收制备聚氨酯保温材料的方法，其特征在于：降解产物A和降解产物B的混合质量比为0.7-1.5:0.5-1.3。
4.根据权利要求1所述的废旧聚氨酯回收制备聚氨酯保温材料的方法，其特征在于：醇解剂为乙二醇、1,3-丁二醇、1,4-丁二醇、1,5-戊二醇、1,6-己二醇、1,8-辛二醇、1,9-壬二醇、1,3-丙二醇、二乙二醇、三乙二醇、三丙二醇、1,2-丙二醇、戊二醇、GR-635C、GR-4110A、GR-4110G、GR-450A、GR-649、PBA-1000、PEG-200、GR-8340A、GR-835G、GRA-6360、PEDA-1500中的一种或多种。
5.根据权利要求1所述的废旧聚氨酯回收制备聚氨酯保温材料的方法，其特征在于：助醇解剂为二乙醇胺、三乙醇胺、单异丙醇胺、二异丙醇胺、三异丙醇胺、N,N-二甲基乙醇胺、N,N-二乙基乙醇胺、环己胺、叔胺中的一种或多种。
6.根据权利要求1所述的废旧聚氨酯回收制备聚氨酯保温材料的方法，其特征在于：接枝型聚醚多元醇改性剂优选为甘油、马来酸酐、淀粉、壳聚糖中的一种或多种；杂环型聚醚多元醇改性剂优选为环氧乙烷、环氧丙烷、环氧氯丙烷、莫卡、木质素的一种或多种。
7.根据权利要求1所述的废旧聚氨酯泡沫回收制备聚氨酯保温材料的方法，其特征在于：步骤(2)中，发泡剂、催化剂、稳定剂的加入量分别为降解产物C质量的5-20％、0.5-10％、0.1-5％。
8.根据权利要求1所述的废旧聚氨酯泡沫回收制备聚氨酯保温材料的方法，其特征在于：发泡剂为HCFC-141b、HCFC-142b、HCFC-123、HCFC-22、环戊烷、异戊烷、HFC-245fa、HFC-365mfc、HFC-334a、水中的一种或多种；
催化剂为三(二甲氨基丙基)六氢三嗪、二甲基乙醇胺、N,N,N′,N",N"-五甲基二乙烯三胺、三亚乙基二胺、环已胺、N,N-二甲基哌嗪、三乙烯二胺、二甲氨基乙基醚、五甲基二亚乙基三胺、2,2′-二吗啉二乙醚、N,N-二甲基苄胺、N,N′,N"-四甲基-1,6己二胺、甲基二乙醇胺、N,N,N′-三甲氨基乙基乙醇胺、三乙胺、1,2-二甲基咪唑、四甲基乙二胺、N,N-二甲基乙醇胺、N,N-二乙基乙醇胺、二甲氨基乙氧基乙醇、N,N,N′,N’-四甲基-1,3-丙胺、1,3,5-三(二甲氨基丙基)六氢三嗪、有机锡中的一种或多种；
稳定剂为硅油L-600、硅油SE-232、硅油CGY-5、硅油DC-193、硅油SC-154、硅油SC-155、硅油SD-601、C12叔胺、十二/十四烷基二甲基叔胺、二甲基硅氧烷中的一种或多种。
9.根据权利要求1所述的废旧聚氨酯回收制备聚氨酯保温材料的方法，其特征在于：异氰酸酯为二苯基甲烷二异氰酸酯、甲苯二异氰酸酯、六亚甲基二异氰酸酯、多苯基多亚甲基多异氰酸酯中的一种。
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