CN116462827A - 一种软质聚氨酯泡沫塑料及其制备方法和应用 - Google Patents
一种软质聚氨酯泡沫塑料及其制备方法和应用 Download PDFInfo
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- CN116462827A CN116462827A CN202310447048.6A CN202310447048A CN116462827A CN 116462827 A CN116462827 A CN 116462827A CN 202310447048 A CN202310447048 A CN 202310447048A CN 116462827 A CN116462827 A CN 116462827A
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- polyurethane foam
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- toluene diisocyanate
- foam plastic
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- 229920005830 Polyurethane Foam Polymers 0.000 title claims abstract description 58
- 239000011496 polyurethane foam Substances 0.000 title claims abstract description 58
- 229920003023 plastic Polymers 0.000 title claims abstract description 31
- 239000004033 plastic Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title description 7
- 239000006260 foam Substances 0.000 claims abstract description 68
- 239000002994 raw material Substances 0.000 claims abstract description 48
- 229920005862 polyol Polymers 0.000 claims abstract description 43
- 150000003077 polyols Chemical class 0.000 claims abstract description 42
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 35
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 34
- 229920000570 polyether Polymers 0.000 claims abstract description 34
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005187 foaming Methods 0.000 claims abstract description 26
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims abstract description 26
- 229920000642 polymer Polymers 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 239000004088 foaming agent Substances 0.000 claims abstract description 17
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- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 239000000985 reactive dye Substances 0.000 claims abstract description 14
- 239000004094 surface-active agent Substances 0.000 claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000010703 silicon Substances 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 28
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 14
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 12
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 3
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 239000001273 butane Substances 0.000 claims description 2
- UQPLHNSUEYQHEZ-UHFFFAOYSA-N cyclopentane dichloromethane Chemical group C(Cl)Cl.C1CCCC1 UQPLHNSUEYQHEZ-UHFFFAOYSA-N 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
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- 229920002635 polyurethane Polymers 0.000 abstract description 46
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- 238000007493 shaping process Methods 0.000 abstract 1
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 24
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
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- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 239000012467 final product Substances 0.000 description 1
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- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
本发明属于聚氨酯制品技术领域,公开了一种软质聚氨酯泡沫塑料及其制作方法。该软质聚氨酯泡沫塑料是将填料、聚醚多元醇、聚合物多元醇、聚醚改性有机硅表面活性剂和水倒入发泡模具中,再添加三乙烯二胺和反应型染料,然后加入物理发泡剂并搅拌均匀,接着同时加入辛酸亚锡和甲苯二异氰酸酯,在所有原料加入模具后,对模具内的物料进行搅拌,直至混合物颜色出现发白时停止搅拌,然后将发泡模具转移至生产温度监测平台,然后待泡沫发起定型,静置熟化后进行脱模制得。本发明按照指定的原料添加顺序操作,可有效降低软质聚氨酯泡沫塑料的生产温度,并得到形貌质量良好的软质聚氨酯泡沫塑料,该泡沫塑料可应用在沙发家具、床铺衬垫或车辆座椅等领域。
Description
技术领域
本发明属于聚氨酯制品的技术领域,更具体地,涉及一种软质聚氨酯泡沫塑料及其制备方法和应用。
背景技术
软质聚氨酯泡沫塑料,简称聚氨酯软泡,是一种易燃的固体聚合物,由于其生产反应释放的热量能够借助自身的低导热性积蓄在泡沫内部,致使聚氨酯软泡长时间处于高温状态。如果聚氨酯软泡配方存在聚醚多元醇用量不足或多异氰酸酯与水用量同时增加(TDI指数不变)的情况,聚氨酯软泡生产温度会显著升高,极易引发聚氨酯软泡热解。由于聚氨酯软泡还具备良好的透气性,其在生产过程中存在自燃的可能。针对这一问题,之前大多数研究提出在配方中添加阻燃剂或使用阻燃多元醇的方法,虽然能提高聚氨酯软泡的阻燃性能,但也会对泡沫的质量与物理性能造成负面影响。
发明内容
为了改进聚氨酯软泡生产温度较高的问题,本发明的目的在于提供一种软质聚氨酯泡沫塑料。通过改变聚氨酯软泡的原料用量比例来减少生产反应放热,并加入物理发泡剂、聚合物多元醇等维持原本的发泡效果与性能,从而可以抑制聚氨酯软泡生产过程中温度过高,又能得到形貌质量良好的聚氨酯软泡。
本发明的另一目的在于提供上述软质聚氨酯泡沫塑料的制备方法。该方法按照原料的添加顺序和正确的操作步骤,可降低甲苯二异氰酸酯、辛酸亚锡等不稳定原料所带来的影响,得到形貌质量良好的聚氨酯软泡。
本发明的再一目的在于提供上述软质聚氨酯泡沫塑料的应用。
本发明的目的通过下述技术方案来实现:
一种软质聚氨酯泡沫塑料,所述软质聚氨酯泡沫塑料是将填料、聚醚多元醇、聚合物多元醇、聚醚改性有机硅表面活性剂和水倒入发泡模具中,再添加三乙烯二胺和反应型染料,然后加入物理发泡剂并搅拌均匀,接着同时加入辛酸亚锡和甲苯二异氰酸酯,在所有原料加入模具后,对模具内的物料进行搅拌,直至混合物颜色出现发白时停止搅拌,然后将发泡模具转移至生产温度监测平台,然后待泡沫发起定型,静置熟化后进行脱模制得;所述甲苯二异氰酸酯为质量比为4:1的2,4-甲苯二异氰酸酯和2,6-甲苯二异氰酸酯;所述聚醚多元醇的相对分子质量为2500~3500g/moL,官能度为2~3,羟值为52.8~58.5mgKOH/g;所述聚合物多元醇的羟值为28.0~32.0mgKOH/g;所述三乙烯二胺溶液为由33%的三乙烯二胺和67%的一缩二丙二醇配置成的醇溶液;为降低原料温度对软泡发泡过程与制品质量造成的影响,每一种原料在生产前根据各自的贮存条件进行密封恒温干燥保存,生产开始时周边环境温度与湿度分别控制在25℃左右和40~45%左右。
所述软质聚氨酯泡沫塑料由下列各组分按质量份混合反应制成:甲苯二异氰酸酯46~48份、聚醚多元醇78~90份、聚合物多元醇22~26份、辛酸亚锡0.165~0.193份、三乙烯二胺溶液0.145~0.165份、物理发泡剂6.19~7.57份、反应型染料0.022~0.028份、聚醚改性有机硅表面活性剂1~1.2份、填料9~12份和水3.4~3.7份。
优选地,原料用量由各组分按下列质量份组成:甲苯二异氰酸酯46.5~47份、聚醚多元醇80~88份、聚合物多元醇23~25.5份、辛酸亚锡0.17~0.18份、三乙烯二胺溶液0.148~0.16份、物理发泡剂6.4~7份、反应型染料0.023~0.026份、聚醚改性有机硅表面活性剂1.1~1.15份、填料9.5~11份和水3.5~3.6份。
更为优选地,原料用量由各组分按下列质量份组成:甲苯二异氰酸酯46.58份、聚醚多元醇86.58份、聚合物多元醇25份、辛酸亚锡0.175份、三乙烯二胺溶液0.15份、物理发泡剂6.88份、反应型染料0.025份、聚醚改性有机硅表面活性剂1.12份、填料10份和水3.55份。本发明在根据此比例,可使生产温度处于较低水平。
在进行更为优选的具体配方调整时,只对其中一种原料(除聚酯多元醇和聚合物多元醇外)的使用份数根据对应原料的使用范围进行控制,其他物质使用份数不变;同时需注意,聚酯多元醇和聚合物多元醇的使用份数需在其使用范围内进行同时控制,每减少使用0.528份聚醚多元醇,对应需增加使用1份聚合物多元醇。根据此调整准则,可使生产温度仍旧处于较低水平。
优选地,所述物理发泡剂为二氯甲烷、环戊烷或质量比为19:1的1,1,1,3,3-五氟丁烷与1,1,1,2,3,3,3-七氯丙烷混合物。
优选地,所述反应型染料为含有反应型羟基的高分子链连接于发色基团的染料(如蓝色BlueX3LV、黑色BlackX41LV、橙色OrangX96、红色RedX64、黄色YellowX15或紫色VioletX80LT),其羟值为50~300mgKOH/g。
优选地,所述填料为碳酸钙、高岭土或硅灰石粉。
所述的软质聚氨酯泡沫塑料的制备方法,包括如下具体步骤:
S1.将填料、聚醚多元醇、聚合物多元醇、聚醚改性有机硅表面活性剂和水倒入发泡模具中,再添加三乙烯二胺和反应型染料;
S2.然后加入物理发泡剂并搅拌均匀,接着同时加入辛酸亚锡和甲苯二异氰酸酯,在所有原料加入模具后,对模具内的物料进行搅拌,直至混合物颜色出现发白时停止搅拌;
S3.将发泡模具转移至生产温度监测平台,待泡沫发起定型,静置熟化后进行脱模,制得软质聚氨酯泡沫塑料。
所述的软质聚氨酯泡沫塑料在沙发家具、床铺衬垫或车辆座椅领域中的应用。
与现有技术相比,本发明具有以下有益效果:
1.本发明采用的配方在生产软质聚氨酯泡沫塑料过程中反应释放的热量较少,小型实验发现泡沫内部最高温度约为129~130℃,与目前常见的中高密度聚氨酯软泡的生产温度相比降低约7~8℃。另外,该配方制得的聚氨酯软泡塑料内部并没有明显的裂痕或收缩现象,虽然聚氨酯软泡侧面表皮较为粗糙,但经过切割工序后仍能继续加工成指定商品。
2.本发明的软质聚氨酯泡沫塑料制作方法,按照原料的添加顺序和正确的操作步骤,可降低甲苯二异氰酸酯、辛酸亚锡等不稳定原料所带来的影响,得到形貌质量良好的聚氨酯软泡。
3.本发明添加了聚合物多元醇、物理发泡剂和填料,这些原料价格低廉,能够减少聚醚多元醇、甲苯二异氰酸酯等价格较高的原料的用量,并且能够增强聚氨酯软泡的承载性。
4.本发明从与反应热最为相关的原料着手,通过改变软质聚氨酯泡沫塑料生产原料用量比例,减少生产反应放热以抑制生产过程中温度过高,并使用物理发泡剂、聚合物多元醇等原料来达到原本的发泡效果与性能。
附图说明
图1为本发明的软质聚氨酯泡沫塑料手工发泡过程的示意图。
图2为实施例6制得的软质聚氨酯泡沫塑料的侧面图与剖面图。
图3为实施例7制得的软质聚氨酯泡沫塑料的侧面图与剖面图。
图4为实施例8制得的软质聚氨酯泡沫塑料的侧面图与剖面图。
图5为实施例6-8制得的软质聚氨酯泡沫塑料和对比例1-3的泡沫塑料的配方的泡内中心最高温度对比图。
具体实施方式
下面结合具体实施例进一步说明本发明的内容。但不应理解为对本发明的限制。若未特别指明,实施例中所用的技术手段为本领域技术人员所熟知的常规手段。
下述实施案例中具体使用原料型号和参数如下:
甲苯二异氰酸酯(上海麦克林生化科技公司的TDI-80,纯度为98%,提供质量比为4:1的2,4-甲苯二异氰酸酯和2,6-甲苯二异氰酸酯);聚醚多元醇(DowChemical公司的VORANOL3010,羟基为52.8-58.5mgKOH/g,酸值为0.03mgKOH/g,最大水含量为0.08wt%,并含有10~15wt%EO,起始剂为聚醚三醇,其官能度为3);聚合物多元醇(山东摩尔化工公司的POP2045,羟值为28.0~32.0mgKOH/g,酸值为0.1mgKOH/g,最大水含量为0.08wt%,固体颗粒含量约为45%);水使用实验室的净水系统(上海芷昂仪器有限公司制造)的去离子水;二氯甲烷(天津致远化学试剂公司,纯度在99%以上);聚醚改性有机硅表面活性剂(Momentive公司的L580);辛酸亚锡(上海泰坦科技公司,其有效成分含量约为95%,密度为1.251kg/m3);三乙烯二胺(上海振贵新材料科技公司的A-33,由33%的三乙烯二胺与67%的一缩二丙二醇配置成的溶液,密度为1.04kg/m3);碳酸钙(天津致远化学试剂公司的轻质碳酸钙,纯度在99.0%以上,为了防止水分的影响,填料在使用前进行干燥处理);反应型染料(Milliken公司的BlueX3LV,颜色为蓝色,色强度为25,羟值为168mgKOH/g)。
实施例1
将碳酸钙、聚醚多元醇、聚合物多元醇、聚醚改性有机硅表面活性剂和水倒入发泡模具中,再添加三乙烯二胺和反应型染料(蓝色BlueX3LV),然后加入物理发泡剂二氯甲烷并搅拌均匀,接着同时加入辛酸亚锡和甲苯二异氰酸酯(也可以先滴加辛酸亚锡,然后快速倒入甲苯二异氰酸酯),整个过程动作要迅速,以减小原料挥发、水解、反应所带来的影响。在所有原料加入模具后,对模具内的物料进行搅拌,直至混合物颜色出现发白时停止搅拌,然后将发泡模具转移至生产温度监测平台,然后待泡沫发起定型,静置熟化后进行脱模,制得软质聚氨酯泡沫塑料。
表1为实施例1中软质聚氨酯泡沫塑料配方各原料的比例,实施例6-8与实施例1各原料的比例相同。
表1实施例1中软质聚氨酯泡沫塑料选用各原料的配方比例
注:实际应用过程中,只需按照比例进行添加,质量单位份可以根据需要进行变换。
实施例2
与实施例1不同的在于:各原料的比例不同,如表2所示。
表2实施例2中软质聚氨酯泡沫塑料选用各原料的配方比例
注:实际应用过程中,只需按照比例进行添加,质量单位份可以根据需要进行变换。
实施例3
与实施例1不同的在于:各原料的比例不同,如表3所示。
表3实施例3中软质聚氨酯泡沫塑料选用各原料的配方比例
注:实际应用过程中,只需按照比例进行添加,质量单位份可以根据需要进行变换。
实施例4
与实施例1不同的在于:各原料的比例不同,如表4所示。
表4实施例4中软质聚氨酯泡沫塑料选用各原料的配方比例
注:实际应用过程中,只需按照比例进行添加,质量单位份可以根据需要进行变换
实施例5
与实施例1不同的在于:各原料的比例不同,如表5所示。
表5实施例5中软质聚氨酯泡沫塑料选用各原料的配方比例
注:实际应用过程中,只需按照比例进行添加,质量单位份可以根据需要进行变换
实施例6
本实施例与实施例1中各原料的比例相同,软质聚氨酯泡沫塑料具体由以下重量的原料组分制成:18.63gTDI-80,34.63gVORANOL3010,10.00gPOP 2045,1.42g水,2.75g二氯甲烷,0.070g辛酸亚锡,0.060gA-33,0.45gL580,4.00g碳酸钙和0.01gBlueX3LV。
图1为软质聚氨酯泡沫塑料手工发泡过程的示意图,其制备步骤包括:
1.打开多路温度测试仪及其配套软件,检测各组热电偶与软件是否处于正常工作状态。同时记录当天的环境温度与湿度,由于夏季温度较高,对原料料温与品质的影响较大。因此,通常会将实验平台的周边环境温度和湿度分别控制在25℃附近和湿度40~50%RH范围内,以降低外界环境所带来的影响。
2.选取热电偶Ⅰ、Ⅱ、Ⅲ,分别监测实验平台环境温度、恒温恒湿箱内温度、聚氨酯软泡泡内温度。其中,聚氨酯软泡泡内温度的监测位置位于聚氨酯软泡最大发泡高度的1/2处;恒温恒湿箱的预设温度为28~30℃,预设湿度为40%RH。
3.在发泡模具中依次加入4.00g碳酸钙、34.63gVORANOL3010、10.00gPOP2045、0.45gL580和1.42g水,滴加0.060gA-33和0.01gBlueX3LV进行搅拌,直至物料颜色均匀;加入2.75g二氯甲烷并搅拌均匀,接着同时加入0.070g辛酸亚锡和18.63gTDI-80(也可以先滴加辛酸亚锡,然后快速倒入TDI-80),对摸具内的物料按0.5~1rps的转速搅拌10~15秒,混合物颜色出现发白后停止搅拌,将搅拌工具缓慢抽离出物料并使物料表面尽可能平整。
4.将发泡模具平稳地转移至恒温恒湿箱中,将预设的热电偶Ⅲ插入到聚氨酯软泡的中心位置,监测聚氨酯软泡制作过程的温度变化。待聚氨酯软泡发起完毕并静置熟化1.5~2h后,制得软质聚氨酯泡沫塑料。对其进行脱模并采用刀具进行切割,观察聚氨酯软泡内部是否出现明显的裂痕、闭孔等情况。
图2为实施例6制得的软质聚氨酯泡沫塑料的侧面图与剖面图。从图2可知,由该配方比例制得的聚氨酯软泡内部没有出现明显的裂痕、闭孔等情况。
实施例7
本实施例与实施例1中各原料的比例相同,软质聚氨酯泡沫塑料具体由以下重量的原料组分制成:20.98gTDI-80,38.96gVORANOL3010,11.25gPOP2045,1.60g水,3.10g二氯甲烷,0.079g辛酸亚锡,0.068gA-33,0.51gL580,4.50g碳酸钙和0.01gBlueX3LV。其制备步骤包括:
1.打开多路温度测试仪及其配套软件,通过多组热电偶同时监测聚氨酯软泡的实验平台环境温度、恒温恒湿箱内温度,并提前预设好聚氨酯软泡泡内温度的监测位置。其中恒温恒湿箱预设温度为28~30℃,预设湿度为40%。
2.在发泡模具中依次加入4.50g碳酸钙、38.96gVORANOL3010、11.25gPOP2045、0.51gL580和1.60g水,滴加0.068gA-33和0.01gBlueX3LV,将混合物进行搅拌,直至混合物颜色均匀,加入3.10g二氯甲烷并搅拌均匀,再加入0.079g辛酸亚锡和20.98gTDI-80,对摸具内的物料按0.5~1rps的转速搅拌10~15秒,混合物颜色出现发白后停止搅拌,将搅拌工具缓慢抽离出物料并使物料表面尽可能平整。
3.将发泡模具平稳地转移至恒温恒湿箱中,将预设的热电偶插入到聚氨酯软泡的中心位置,监测聚氨酯软泡制作过程的温度变化。聚氨酯软泡发起完毕并静置熟化1.5~2h后,制得软质聚氨酯泡沫塑料。将聚氨酯软泡进行脱模并采用刀具进行切割,观察聚氨酯软泡内部是否出现明显的裂痕、闭孔等情况。
图3为实施例7制得的软质聚氨酯泡沫塑料的侧面图与剖面图。从图3可知,在实施例6各原料比例不变的基础上通过增大原料用量,由该配方比例制得的聚氨酯软泡内部任然没有出现明显的裂痕、闭孔等情况,体积相应变大(图片由于拍摄视角问题,显得比实施例6小,实际为用同一模具进行制作,观察泡沫溢出体积即可比较实际体积)。
实施例8
本实施例与实施例1中各原料的比例相同,软质聚氨酯泡沫塑料具体由以下重量的原料组分制成:23.33gTDI-80,43.29gVORANOL3010,12.50gPOP 2045,1.78g水,3.44g二氯甲烷,0.088g辛酸亚锡,0.075gA-33,0.56gL580,5.00g碳酸钙和0.01gBlueX3LV。其制备步骤包括:
1.打开多路温度测试仪及其配套软件,通过多组热电偶同时监测聚氨酯软泡的实验平台环境温度、恒温恒湿箱内温度,并提前预设好聚氨酯软泡泡内温度的监测位置。其中恒温恒湿箱预设温度为28~30℃,预设湿度为40%。
2.在发泡模具中依次加入5.00g碳酸钙、43.29gVORANOL3010、12.50gPOP2045、0.56gL580和1.78g水,再滴加0.075gA-33和0.01gBlueX3LV,将混合物进行搅拌,直至混合物颜色均匀;再加入3.44g二氯甲烷并搅拌均匀,加入0.088g辛酸亚锡和23.33gTDI-80,对摸具内的物料按0.5~1rps的转速搅拌10~15秒,混合物颜色出现发白后停止搅拌,将搅拌工具缓慢抽离出物料并使物料表面尽可能平整。
3.将发泡模具平稳地转移至恒温恒湿箱中,将预设的热电偶插入到聚氨酯软泡的中心位置,监测聚氨酯软泡制作过程的温度变化。聚氨酯软泡发起完毕并静置熟化1.5~2h后,制得软质聚氨酯泡沫塑料。对聚氨酯软泡进行脱模并采用刀具进行切割,观察聚氨酯软泡内部是否出现明显的裂痕、闭孔等情况。
图4为实施例8制得的软质聚氨酯泡沫塑料的侧面图与剖面图。从图4可知,在实施例7各原料比例不变的基础上通过增大原料用量,由该配方比例制得的聚氨酯软泡内部任然没有出现明显的裂痕、闭孔等情况,体积相应变大(图片由于拍摄视角问题,显得比实施例6小,实际为用同一模具进行制作,观察泡沫溢出体积即可比较实际体积)。
对比例1
为当前某聚氨酯软泡工业生产配方等比例简化所得到的配方(配方A):19.23gTDI-80,35.70gVORANOL3010,8.00gPOP2045,1.48g水,2.20g二氯甲烷,0.070g辛酸亚锡,0.060gA-33,0.45gL580,4.00g碳酸钙和0.01gBlue X3LV。
对比例2
由配方A调整所得的配方B,其采用聚醚多元醇和水作为多元醇和发泡剂。配方B:24.54gTDI-80,40.00gVORANOL3010,2.00g水,0.070g辛酸亚锡,0.060gA-33,0.45gL580,4.00g碳酸钙和0.01gBlueX3LV。
对比例3
改变配方B中甲苯二异氰酸酯与水用量的比例所得配方C。配方C:30.70gTDI-80,40.00gVORANOL3010,2.60g水,0.070g辛酸亚锡,0.060gA-33,0.45gL580,4.00g碳酸钙和0.01gBlueX3LV。
图5为实施例6-8制得的软质聚氨酯泡沫塑料和对比例1-3的泡沫塑料的配方的泡内中心最高温度对比图。从图5中可知,实施例6配方制得的泡沫泡内的中心最高温度为128.2~129.6℃,实施例7配方制得的泡沫泡内的中心最高温度为130.9~131.9℃,实施例8配方制得的泡沫泡内的中心最高温度为130.7~133.8℃,对比例1配方制得的泡沫泡内的中心最高温度为136.5~137.4℃,对比例2配方制得的泡沫泡内的中心最高温度为161.0~163.2℃,对比例3配方制得的泡沫泡内的中心最高温度为170.3~173.5℃。实施例6-8温度相对较低,而对比例1-3在聚醚多元醇用量不变(提供的羟值不变)的情况下,泡内中心最高温度增加明显。一般而言,生产温度会在原料用量增加时温度随之升高,且当温度突破200℃,软泡就会出现热分解的现象。因此,在原料使用量达到工业生产用量时,本发明的软泡配方相对其他技术有更多的安全温度的增长空间,能够有效保证生产安全。由此可知,实施例6-8的泡内中心最高温度比对比例1-3的更低、更稳定。本发明提供的一种软质聚氨酯泡沫塑料配方可有效减少生产中的自燃风险,提供的生产配方具有更好的生产安全温度。
上述实施例为本发明较佳的实施方式,但本发明的实施方式并不受上述实施例的限制,其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化,均应为等效的置换方式,都包含在本发明的保护范围之内。
Claims (8)
1.一种软质聚氨酯泡沫塑料,其特征在于,所述软质聚氨酯泡沫塑料是将填料、聚醚多元醇、聚合物多元醇、聚醚改性有机硅表面活性剂和水倒入发泡模具中,再添加三乙烯二胺和反应型染料,然后加入物理发泡剂并搅拌均匀,接着同时加入辛酸亚锡和甲苯二异氰酸酯,在所有原料加入模具后,对模具内的物料进行搅拌,直至混合物颜色出现发白时停止搅拌,然后将发泡模具转移至生产温度监测平台,然后待泡沫发起定型,静置熟化后进行脱模制得;所述甲苯二异氰酸酯为质量比为4:1的2,4-甲苯二异氰酸酯和2,6-甲苯二异氰酸酯;所述聚醚多元醇的相对分子质量为2500~3500g/moL,官能度为2~3,羟值为52.8~58.5mgKOH/g;所述聚合物多元醇的羟值为28.0~32.0mgKOH/g;所述三乙烯二胺溶液为由33%的三乙烯二胺和67%的一缩二丙二醇配置成的醇溶液;
所述软质聚氨酯泡沫塑料由下列各组分按质量份混合反应制成:甲苯二异氰酸酯46~48份、聚醚多元醇78~90份、聚合物多元醇22~26份、辛酸亚锡0.165~0.193份、三乙烯二胺溶液0.145~0.165份、物理发泡剂6.19~7.57份、反应型染料0.022~0.028份、聚醚改性有机硅表面活性剂1~1.2份、填料9~12份和水3.4~3.7份。
2.根据权利要求1所述的软质聚氨酯泡沫塑料,其特征在于,原料用量由各组分按下列质量份组成:甲苯二异氰酸酯46.5~47份、聚醚多元醇80~88份、聚合物多元醇23~25.5份、辛酸亚锡0.17~0.18份、三乙烯二胺溶液0.148~0.16份、物理发泡剂6.4~7份、反应型染料0.023~0.026份、聚醚改性有机硅表面活性剂1.1~1.15份、填料9.5~11份和水3.5~3.6份。
3.根据权利要求2所述的软质聚氨酯泡沫塑料,其特征在于,原料用量由各组分按下列质量份组成:甲苯二异氰酸酯46.58份、聚醚多元醇86.58份、聚合物多元醇25份、辛酸亚锡0.175份、三乙烯二胺溶液0.15份、物理发泡剂6.88份、反应型染料0.025份、聚醚改性有机硅表面活性剂1.12份、填料10份和水3.55份。
4.根据权利要求1-3任一项所述的软质聚氨酯泡沫塑料,其特征在于,所述物理发泡剂为二氯甲烷、环戊烷或质量比为19:1的1,1,1,3,3-五氟丁烷与1,1,1,2,3,3,3-七氯丙烷混合物。
5.根据权利要求1-3任一项所述的软质聚氨酯泡沫塑料,其特征在于,所述反应型染料为含有反应型羟基的高分子链连接于发色基团的染料,其羟值为50~300mgKOH/g。
6.根据权利要求1-3任一项所述的软质聚氨酯泡沫塑料,其特征在于,所述填料为碳酸钙、高岭土或硅灰石粉。
7.根据权利要求1-6任一项所述的软质聚氨酯泡沫塑料的制备方法,其特征在于,包括如下具体步骤:
S1.将填料、聚醚多元醇、聚合物多元醇、聚醚改性有机硅表面活性剂和水倒入发泡模具中,再添加三乙烯二胺和反应型染料;
S2.然后加入物理发泡剂并搅拌均匀,接着同时加入辛酸亚锡和甲苯二异氰酸酯,在所有原料加入模具后,对模具内的物料进行搅拌,直至混合物颜色出现发白时停止搅拌;
S3.将发泡模具转移至生产温度监测平台,待泡沫发起定型,静置熟化后进行脱模,制得软质聚氨酯泡沫塑料。
8.权利要求1-6任一项所述的软质聚氨酯泡沫塑料在沙发家具、床铺衬垫或车辆座椅领域中的应用。
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