CN117467103A - 一种弹性聚氨酯树脂原料、弹性聚氨酯树脂 - Google Patents
一种弹性聚氨酯树脂原料、弹性聚氨酯树脂 Download PDFInfo
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- CN117467103A CN117467103A CN202311493413.3A CN202311493413A CN117467103A CN 117467103 A CN117467103 A CN 117467103A CN 202311493413 A CN202311493413 A CN 202311493413A CN 117467103 A CN117467103 A CN 117467103A
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- polyurethane resin
- raw material
- elastic polyurethane
- resin raw
- allophanate
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 32
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- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical group O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 claims abstract description 21
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- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 7
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Abstract
本发明提供通过脂肪族多异氰酸酯与聚己内酯多元醇反应得到的弹性聚氨酯树脂原料,其用于制造具有弹性的聚氨酯树脂,所述弹性聚氨酯树脂原料含有氨基甲酸酯、脲基甲酸酯和异氰脲酸酯结构,其中,氨基甲酸酯/脲基甲酸酯的摩尔比率为0.1‑10,以聚己内酯起始剂的羟基形成的脲基甲酸酯/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯的摩尔比率为0.2‑1。本发明的弹性聚氨酯原料制备的聚氨酯涂层具有良好的弹性和耐化性能。
Description
技术领域
本发明属于异氰酸酯领域,尤其涉及一种弹性聚氨酯树脂原料、弹性聚氨酯树脂的制备方法和应用。
背景技术
随着新能源产业的蓬勃发展,催生了功能新材料的广泛需求,如汽车轻量化、风电叶片大型化等趋势加速了塑料基材料和复合材料的发展,相应地,上述材料的涂层解决方案亟待解决。
脂肪族聚异氰酸酯具有耐候、耐磨、耐腐蚀等优良的性能,聚异氰酸酯广泛用于涂料、胶黏剂、弹性体行业。
技术人员基于脂肪族异氰酸酯的弹性涂层材料已经开展了部分研究,US5880215A通过聚酯改性标准型HDI三聚体,实现涂层弹性化的目的,但同时,由于受官能度下降和粘度增长的限制,改性程度并不高,涂层弹性提升并不明显。EP0469389A公开了一种双组份聚氨酯涂层,其中描述了聚醚改性的含氨基甲酸酯结构的固化剂,但由于官能度较低,耐化学性有待进一步提升。
聚己内酯相比传统的聚酯和聚醚,兼顾了柔韧性和机械强度,还具有较好的耐热、耐候性能。CN102292367A描述了一种聚己内酯二元醇改性的多异氰酸酯,其具有较好的弹性,同时官能度较高,但大量的氨酯结构和脲酯结构的引入,导致了产品低温条件下发生结晶、进而流动性变差,影响产品使用。
发明内容
本发明的目的在于,提供一种弹性聚氨酯树脂原料,其制备的聚氨酯涂层不仅能具有良好的弹性和耐化性能,而且解决了产品低温结晶析出的问题。
为了实现上述目的,本发明采用的技术方案如下:
一种弹性聚氨酯树脂原料,所述的弹性聚氨酯树脂原料用于制造具有弹性的聚氨酯树脂;
所述弹性聚氨酯树脂原料是通过脂肪族多异氰酸酯与聚己内酯多元醇反应得到的;
所述弹性聚氨酯树脂原料含有氨基甲酸酯、脲基甲酸酯和异氰脲酸酯结构,其中,氨基甲酸酯/脲基甲酸酯的摩尔比率为0.1-10,以聚己内酯起始剂的羟基形成的脲基甲酸酯(I)/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯(II)的摩尔比率为0.2-1。
本发明中,所述弹性聚氨酯树脂原料含有氨基甲酸酯、脲基甲酸酯和异氰脲酸酯结构,通过上述结构的引入调整聚氨酯树脂的弹性,当氨基甲酸酯/脲基甲酸酯的摩尔比率小于0.1,弹性聚氨酯树脂原料的弹性不佳,而当氨基甲酸酯/脲基甲酸酯的摩尔比率大于10,以该弹性聚氨酯树脂原料形成的弹性聚氨酯耐化性能不佳。
本发明中,所述弹性聚氨酯树脂原料,以聚己内酯起始剂的羟基形成的脲基甲酸酯(I)/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯(II)的摩尔比率为0.2-1,通过控制(I)/(II)的摩尔比率,调整弹性聚氨酯树脂原料的低温结晶性能,当(I)/(II)的摩尔比率小于0.2时,弹性聚氨酯树脂原料容易在低温条件下发生结晶,而当摩尔比率大于1时,弹性聚氨酯树脂原料的弹性不佳。
本发明用于合成弹性聚氨酯树脂原料的脂肪族多异氰酸酯选自碳数为4~30的脂肪族二异氰酸酯,优选自1,4-丁烷二异氰酸酯、1,5-戊烷二异氰酸酯、2,2,4-三甲基-六亚甲基-1,6-二异氰酸酯、赖氨酸二异氰酸酯、异佛尔酮二异氰酸酯、1,3-双(异氰酸根合甲基)环己烷和4,4’-二环己基甲烷二异氰酸酯中的一种或多种,优选六亚甲基二异氰酸酯、异佛尔酮二异氰酸酯、五亚甲基二异氰酸酯中的一种或多种,特别优选六亚甲基二异氰酸酯。
本发明中用于合成弹性聚氨酯树脂原料的聚己内酯多元醇为数均分子量在400-2000且平均官能团数在2-3的多元醇化合物的一种或多种;为由ε-己内酯和简单的多元醇作为起始分子开环制备的酯醇;
用于制备这些酯醇的合适多元醇特别为分子量范围为62-400的那些,例如1,2-乙二醇、1,2-和1,3-丙二醇、一缩二乙二醇、异构的丁二醇、戊二醇、己二醇、庚二醇和辛二醇,1,10-癸二醇、1,2-和1,4-环己二醇、1,4-环己烷二甲醇、4,4'-(1-甲基亚乙基)-双环己醇、1,2,3-丙三醇、1,1,1-三羟甲基乙烷、1,2,6-己三醇、1,1,1-三羟甲基丙烷、2,2-双(羟基甲基)-1,3-丙二醇、双-(2-羟基乙基)氢醌、1,2,4-和1,3,5-三羟基环己烷或1,3,5-三(2-羟基乙基)异氰脲酸酯,特别优选二元醇;
本发明中用于合成弹性聚氨酯树脂原料的聚己内酯多元醇为一种或多种聚己内酯多元醇的混合物,其中包括结构III和任选的IV:
结构III中至少一端含起始剂的羟基,至少一端含ε-己内酯开环形成的羟基,结构IV中羟基均为ε-己内酯开环形成的羟基;
本发明中可通过调整反应工艺等措施调节反应选择性获得含有III和IV的结构的聚己内酯多元醇,也可通过引入保护基团等方式,其中较为有效的方式可举例说明:
(1)将用于合成聚己内酯多元醇的起始分子的简单多元醇中的羟基使用保护基团进行部分保护,所述的保护基团如常见的硅基保护基,可以列举但不仅限于TMS、TES、IPDMS、DEIPS,反应原理如下:
所述的保护基团如常见的羧酸酯或碳酸酯基保护基,可以列举但不仅限于氯代乙酸酯、三氯乙酸酯、三氟乙酸酯、特戊酸酯、苯甲酸酯、叔丁基碳酸酯,反应原理如下:
所述的保护基团如常见的可以醇形成醚键的保护基,反应原理如下:
(2)将上述部分羟基被保护基团保护的起始分子的简单多元醇与ε-己内酯在催化剂例如路易斯或布朗斯台德酸、有机锡或钛化合物的存在下开环聚合,反应温度为20-200℃,优选50-200℃;
(3)将步骤(2)中的开环聚合产物脱保护,常见的方法如水解、加氢等,获得所述用于合成弹性聚氨酯树脂原料的聚己内酯多元醇。
本发明中所述的弹性聚氨酯树脂原料,其在分子末端具有异氰酸酯基。
本发明中所述的弹性聚氨酯树脂原料,相对于所述弹性聚氨酯树脂原料的总量而言,所述异氰酸酯基的含量为1%-15wt%。
本发明中所述的弹性聚氨酯树脂原料,相对于所述弹性聚氨酯树脂原料的总量而言,异氰酸酯三聚体的含量为5-15wt%,当异氰酸酯三聚体含量小于5%时,所述的弹性聚氨酯树脂原料耐化性能不佳,而当异氰酸酯三聚体含量大于15%时,所述的弹性聚氨酯树脂原料的弹性不佳。
本发明中所述的弹性聚氨酯树脂原料,异氰酸酯基的平均官能团数为3.5-5,当异氰酸酯基的平均官能团数小于3.5时,所述的弹性聚氨酯树脂原料耐化性能不佳,而当异氰酸酯基的平均官能团数大于5.0时,所述的弹性聚氨酯树脂原料的弹性不佳。
本发明中所述的弹性聚氨酯树脂原料,在25℃条件下的粘度为4000-15000cP。
本发明还涉及上述弹性聚氨酯树脂原料的制备。
本发明中所述的弹性聚氨酯树脂原料可优选通过脂肪族多异氰酸酯与聚己内酯多元醇配合催化剂而反应得到。
本发明中,所述催化剂包含但不限于金属羧酸盐和/或季铵盐。在一些示例中,所述聚合催化剂可选自(i)四甲基铵、四乙基铵等四烷基铵的氢氧化物、乙酸、癸酸等有机弱酸盐;(ii)三甲基羟基丙基铵、三甲基羟基乙基铵、三乙基羟基丙基铵、三乙基羟基乙基铵等羟基烷基铵的氢氧化物、乙酸、癸酸等的有机弱酸盐;(iii)乙酸、己酸、辛酸、十四烷酸等烷基羧酸的锡、锌、铅、铋等的金属盐;
本发明中,所述催化剂的加入量为脂肪族二异氰酸酯量的0.001wt%-0.1wt%,催化剂可以作为纯物质或者任选地以任意浓度溶解在醇中使用;其中,所述醇为一元醇和/或二元醇;优选的,所述一元醇选自C1-C10的脂肪族醇、芳脂族醇、芳香族醇、脂肪族酚、芳脂族酚和芳香族酚中的一种或多种,所述一元醇优选以直链、支链或环状醇或酚的形式存在;所述的二元醇,不限定于以下,例如可列举出,乙二醇、1,3-丙二醇、1,2-丙二醇、1,3-丁二醇、1,4-丁二醇、2,3-丁二醇、1,5-戊二醇、1,2-戊二醇、1,3-戊二醇、1,4-戊二醇、新戊二醇、1,6-己二醇、1,7-庚二醇、1,8-辛二醇、1,9-壬二醇、1,10-癸二醇、二乙二醇、聚乙二醇、聚丙二醇、聚四亚甲基二醇、2-甲基-1,3-丙二醇、3-甲基-1,5-戊二醇、2-甲基-1,8-辛二醇以及2,2-二乙基-1,3-丙二醇。
本发明中,所述催化反应的反应温度为30-150℃,优选为60-150℃。
本发明中,所述终止催化反应的方法是加入催化剂毒物;
优选的,所述催化剂毒物选自质子酸和/或酰化剂,优选自磷酸、苯甲酸、苯甲酰氯和磷酸二丁酯中的一种或多种。
本领域技术人员可以理解,反应体系中所使用的聚合催化剂种类不同,会导致催化剂毒物用量不同。在本发明反应体系中,所述催化剂毒物的加入量以使体系中聚合催化剂失去活性为准。
在一些实施方案中,催化反应的工艺为:氮气氛围下,将多异氰酸酯和聚己内酯多元醇加入反应容器中进行混合,搅拌下将体系升温,进行氨酯化反应;将温度调整至一定催化反应温度,添加催化剂;跟踪测定反应液的NCO%,当NCO%值降到目标值时,添加催化剂毒物终止反应;过滤反应液后,用薄膜蒸发器去除未反应的二异氰酸酯单体,得到目标弹性聚氨酯原料。
本发明中涉及的所有%,除特别说明外,均为质量%;涉及的所有ppm,除特别说明外,均为质量ppm。
本发明中涉及的压力均为绝对压力。
本发明还涉及弹性聚氨酯树脂。
本发明中所述的弹性聚氨酯树脂,其是通过使上述弹性聚氨酯树脂原料与含有活泼氢基团的化合物进行反应而得到的。
相对于现有技术,本发明技术方案的有益效果在于:
(1)提供一种弹性聚氨酯原料,其制备的聚氨酯涂层具有良好的弹性和耐化性能
(2)提供一种弹性聚氨酯原料,其具有在低温条件下不易发生结晶析出的问题。
具体实施方式
为了能够详细地理解本发明的技术特征和内容,下面将更详细地描述本发明的优选实施方式。虽然实施例中描述了本发明的优选实施方式,然而应该理解,可以以各种形式实现本发明而不应被这里阐述的实施方式所限制。
主要原料来源:
1,6-六亚甲基二异氰酸酯, HDI,万华化学;
异丁醇,纯度≥99%,西格玛奥德里奇;
钯碳,5%钯,40-60%水含量,阿拉丁;
ε-己内酯,纯度≥99.9%,聚仁化工新材料;
3,4-二氢-2H-吡喃,纯度≥98%,阿拉丁;
一缩二乙二醇,纯度>99%,阿拉丁;
新戊二醇,纯度>99%,阿拉丁;
三羟甲基丙烷,纯度>99%,阿拉丁;
PCL2053,纯度>98%,聚仁化工新材料;
四甲基氢氧化铵,40wt%甲醇溶液,阿拉丁;
异辛酸锡,纯度≥97%,西格玛奥德里奇;
磷酸,85%水溶液,西格玛奥德里奇;
检测方法:
本发明按照GB/T 12009.4-1989的方法,使用瑞士万通905电位滴定仪测定NCO含量。
本发明中弹性聚氨酯原料的三聚体含量和官能度可以通过GPC(分子凝胶色谱)测试。具体的测试条件如下:
GPC设备:Agilent1260
GPC柱子:Pl1113-6520和Pl113-6325(Agilent)
样品浓度:3wt%
流动相:四氢呋喃
检测方法:示差检测器
流速:1ml/min
柱温:35℃
标准曲线使用分子量为162-17900的聚苯乙烯;
三聚体含量=(保留时间在23-25min之间的出峰面积积分值)/(所有出峰总面积积分值);
官能度测试=NCO含量*数均分子量/42
本发明涉及的动力学粘度采用BrookField DV-IPrime粘度计,采用S21转子于25℃获得。
氨基甲酸酯/脲基甲酸酯的摩尔比率和以聚己内酯起始剂的羟基形成的脲基甲酸酯/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯的摩尔比率使用BrukerBiospin的AVANCE400,以氘代氯仿CDCl3为溶剂,以试样(多异氰酸酯组合物)浓度60%、100MHz、扫描过夜测定13C核磁共振谱。
需要说明的是,在上述测定中,将以下的信号的积分值除以测定的碳的数量,由其值求出各摩尔比率:
脲基甲酸酯基:154ppm附近,
氨基甲酸酯基:156.5ppm附近,
以聚己内酯起始剂的羟基形成的脲基甲酸酯:153.7ppm附近,
与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯:153.9ppm附近,
氨基甲酸酯/脲基甲酸酯的摩尔比率:(156.5ppm附近的信号面积)/(154ppm附近的信号面积);
以聚己内酯起始剂的羟基形成的脲基甲酸酯/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯的摩尔比率:(153.7ppm附近的信号面积)/(153.9ppm附近的信号面积);
主要设备:
反应釜,容积2L,锚式搅拌桨,旋转直径70mm;
二级薄膜蒸发器:一级蒸发器面积0.1m2,二级蒸发器面积0.05m2。
合成例
聚己内酯多元醇A1的制备
氮气氛围下,一缩二乙二醇106g、3,4-二氢-2H-吡喃50g、对甲苯磺酸0.01g在80℃条件下反应5h。加入570gε-己内酯和0.035g异辛酸锡升温至150℃继续反应4h。冷却至室温后,加入钯碳0.1g,通入0.1Mpa氢气,在120℃条件下反应4h。冷却至室温后过滤,在120℃/20pa经薄膜蒸发器分离得到液体聚己内酯二元醇。
聚己内酯多元醇A2的制备
氮气氛围下,新戊二醇104g、3,4-二氢-2H-吡喃70g、对甲苯磺酸0.01g在85℃条件下反应4.5h。加入440gε-己内酯和0.035g异辛酸锡升温至150℃继续反应4h。冷却至室温后,加入钯碳0.1g,通入0.1Mpa氢气,在120℃条件下反应4h。冷却至室温后过滤,在120℃/20pa经薄膜蒸发器分离得到液体聚己内酯二元醇。
聚己内酯多元醇A3的制备
氮气氛围下,三羟甲基丙烷134g、3,4-二氢-2H-吡喃30g、对甲苯磺酸0.01g在85℃条件下反应4.5h。加入440gε-己内酯和0.035g异辛酸锡升温至150℃继续反应4h。冷却至室温后,加入钯碳0.1g,通入0.1Mpa氢气,在120℃条件下反应4h。冷却至室温后过滤,在120℃/20pa经薄膜蒸发器分离得到液体聚己内酯三元醇。
实施例1
氮气氛围下,将800g起始二异氰酸酯HDI和300g上述聚己内酯二元醇A1加入至2L反应容器中进行混合,搅拌下将体系温度升至90℃,保持3.0h进行氨酯化反应。将反应混合物冷却至65℃,添加2.5%四甲基氢氧化铵异丁醇溶液(40wt%四甲基氢氧化铵甲醇溶液与异丁醇配置而成)6.4g引发脲基甲酸酯化反应,跟踪测定反应液的NCO%。当NCO%值降到22.5%时添加0.20g磷酸终止反应。过滤反应液后,使用薄膜蒸发器,进料温度100℃,分离温度压力130℃,绝对压力50pa,进料量0.5Kg/h,去除未反应的HDI,得到具有以下特征的弹性聚氨酯原料:
氨基甲酸酯/脲基甲酸酯的摩尔比率:1.0
以聚己内酯起始剂的羟基形成的脲基甲酸酯(I)/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯(II)的摩尔比率:0.45
异氰酸酯基的含量:11.4%
异氰酸酯三聚体的含量:10.5%
平均官能团数:4.2
粘度为6700cP/25℃。
实施例2
氮气氛围下,将800g起始二异氰酸酯HDI和120g上述聚己内酯二元醇A1、300gPCL2053加入至2L反应容器中进行混合,搅拌下将体系温度升至90℃,保持3.5h进行氨酯化反应。将反应混合物冷却至70℃,添加2.5%四甲基氢氧化铵异丁醇溶液(40wt%四甲基氢氧化铵甲醇溶液与异丁醇配置而成)11.2g引发脲基甲酸酯化反应,跟踪测定反应液的NCO%。当NCO%值降到23.2%时添加0.35g磷酸终止反应。过滤反应液后,使用薄膜蒸发器,进料温度100℃,分离温度压力130℃,绝对压力50pa,进料量0.5Kg/h,去除未反应的HDI,得到具有以下特征的弹性聚氨酯原料:
氨基甲酸酯/脲基甲酸酯的摩尔比率:3.0
以聚己内酯起始剂的羟基形成的脲基甲酸酯(I)/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯(II)的摩尔比率:0.3
异氰酸酯基的含量:9.3%
异氰酸酯三聚体的含量:7.2%
平均官能团数:3.8
粘度5200cP/25℃
实施例3
氮气氛围下,将800g起始二异氰酸酯HDI和200g上述聚己内酯二元醇A2加入至2L反应容器中进行混合,搅拌下将体系温度升至90℃,保持3.5h进行氨酯化反应。将反应混合物冷却至70℃,添加2.5%四甲基氢氧化铵异丁醇溶液(40wt%四甲基氢氧化铵甲醇溶液与异丁醇配置而成)6.4g引发脲基甲酸酯化反应,跟踪测定反应液的NCO%。当NCO%值降到24.3%时添加0.2g磷酸终止反应。过滤反应液后,使用薄膜蒸发器,进料温度100℃,分离温度压力130℃,绝对压力50pa,进料量0.5Kg/h,去除未反应的HDI,得到具有以下特征的弹性聚氨酯原料:
氨基甲酸酯/脲基甲酸酯的摩尔比率:0.53
以聚己内酯起始剂的羟基形成的脲基甲酸酯(I)/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯(II)的摩尔比率:0.7
异氰酸酯基的含量:14.2%
异氰酸酯三聚体的含量:14.5%
平均官能团数:3.7
粘度10000cP/25℃
实施例4
氮气氛围下,将800g起始二异氰酸酯HDI和500g聚己内酯三元醇A3加入至2L反应容器中进行混合,搅拌下将体系温度升至90℃,保持3.5h进行氨酯化反应。将反应混合物冷却至65℃,添加2.5%四甲基氢氧化铵异丁醇溶液(40wt%四甲基氢氧化铵甲醇溶液与异丁醇配置而成)6.4g引发脲基甲酸酯化反应,跟踪测定反应液的NCO%。当NCO%值降到23.8%时添加0.20g磷酸终止反应。过滤反应液后,使用薄膜蒸发器,进料温度100℃,分离温度压力130℃,绝对压力50pa,进料量0.5Kg/h,去除未反应的HDI,得到具有以下特征的弹性聚氨酯原料:
氨基甲酸酯/脲基甲酸酯的摩尔比率:8.5
以聚己内酯起始剂的羟基形成的脲基甲酸酯(I)/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯(II)的摩尔比率:0.35
异氰酸酯基的含量:3.5%
异氰酸酯三聚体的含量:5.1%
平均官能团数:3.5
粘度:9800cP/25℃
实施例5
氮气氛围下,将800g起始二异氰酸酯HDI和25g上述聚己内酯二元醇A1、225gPCL2053加入至2L反应容器中进行混合,搅拌下将体系温度升至90℃,保持3.0h进行氨酯化反应。将反应混合物冷却至70℃,添加2.5%四甲基氢氧化铵异丁醇溶液(40wt%四甲基氢氧化铵甲醇溶液与异丁醇配置而成)6.4g引发脲基甲酸酯化反应,跟踪测定反应液的NCO%。当NCO%值降到21.5%时添加0.20g磷酸终止反应。过滤反应液后,使用薄膜蒸发器,进料温度100℃,分离温度压力130℃,绝对压力50pa,进料量0.5Kg/h,去除未反应的HDI,得到具有以下特征的弹性聚氨酯原料:
氨基甲酸酯/脲基甲酸酯的摩尔比率:0.12
以聚己内酯起始剂的羟基形成的脲基甲酸酯(I)/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯(II)的摩尔比率:0.23
异氰酸酯基的含量:13.8%
异氰酸酯三聚体的含量:14.8%
平均官能团数:4.8
粘度:14000cP/25℃
对比例1
氮气氛围下,将800g起始二异氰酸酯HDI和200g PCL2053加入至2L反应容器中进行混合,搅拌下将体系温度升至90℃,保持3.0h进行氨酯化反应。将反应混合物冷却至70℃,添加2.5%四甲基氢氧化铵异丁醇溶液(40wt%四甲基氢氧化铵甲醇溶液与异丁醇配置而成)6.4g引发脲基甲酸酯化反应,跟踪测定反应液的NCO%。当NCO%值降到23.2%时添加0.20g磷酸终止反应。过滤反应液后,使用薄膜蒸发器,进料温度100℃,分离温度压力130℃,绝对压力50pa,进料量0.5Kg/h,去除未反应的HDI,得到具有以下特征的弹性聚氨酯原料:氨基甲酸酯/脲基甲酸酯的摩尔比率:0.08
以聚己内酯起始剂的羟基形成的脲基甲酸酯(I)/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯(II)的摩尔比率:0
异氰酸酯基的含量:15.3%
异氰酸酯三聚体的含量:16.8%
平均官能团数:3.7
粘度:12000cP/25℃。
将通过上述实施例1-5、对比例1得到的弹性聚氨酯原料至于0℃条件下存储,结晶析出时间如下:
表1弹性聚氨酯原料结晶析出时间
实施例6(用途实施例)
将实施例1、实施例5和对比实施例1所制得的弹性聚氨酯树脂原料1、弹性聚氨酯树脂原料5和弹性聚氨酯树脂原料1’分别以1:1的NCO/OH摩尔比与羟基丙烯酸树脂混合,再加入乙酸丁酯溶剂进行稀释至40%,最终制得漆料。将弹性聚氨酯树脂原料1和弹性聚氨酯树脂原料5制得的漆料标注为漆料1和漆料5,弹性聚氨酯树脂原料1’制得的漆料标注为漆料1’。对各漆料在抗冲击、柔韧性等方面的性能测试结果如表2所示。
表2漆料各性能测试结果
项目 | 漆料1 | 漆料5 | 漆料1’ |
抗冲击(正冲) | 100cm | 100cm | 90cm |
抗冲击(反冲) | 100cm | 100cm | <10cm |
柔韧性 | 2mm | 2mm | 3mm |
以上已经描述了本发明的各实施例,上述说明是示例性的,并非穷尽性的,并且也不限于所披露的各实施例。在不偏离所说明的各实施例的范围和精神的情况下,对于本技术领域的普通技术人员来说许多修改和变更都是显而易见的。
Claims (9)
1.弹性聚氨酯树脂原料,其特征在于,所述弹性聚氨酯树脂原料是通过脂肪族多异氰酸酯与聚己内酯多元醇反应得到的,
所述弹性聚氨酯树脂原料含有氨基甲酸酯、脲基甲酸酯和异氰脲酸酯结构,其中,氨基甲酸酯/脲基甲酸酯的摩尔比率为0.1-10,以聚己内酯起始剂的羟基形成的脲基甲酸酯(I)/与聚己内酯中己内酯单元键连的羟基形成的脲基甲酸酯(II)的摩尔比率为0.2-1,
2.根据权利要求1所述的弹性聚氨酯树脂原料,其特征在于,其在分子末端具有异氰酸酯基。
3.根据权利要求1-2任一项所述的弹性聚氨酯树脂原料,其特征在于,相对于所述弹性聚氨酯树脂原料的总量,异氰酸酯基的含量为1%-15wt%。
4.根据权利要求1-3任一项所述的弹性聚氨酯树脂原料,其特征在于,相对于所述弹性聚氨酯树脂原料的总量,异氰酸酯三聚体的含量为5-15wt%。
5.根据权利要求1-4任一项所述的弹性聚氨酯树脂原料,其特征在于,异氰酸酯基的平均官能团数为3.5-5。
6.根据权利要求1-5任一项所述的弹性聚氨酯树脂原料,其特征在于,所述弹性聚氨酯树脂原料在25℃条件下的粘度为4000-15000cP。
7.根据权利要求1-6任一项所述的弹性聚氨酯树脂原料,其特征在于,所述脂肪族多异氰酸酯选自选自碳数为4~30的脂肪族二异氰酸酯,优选自1,4-丁烷二异氰酸酯、1,5-戊烷二异氰酸酯、2,2,4-三甲基-六亚甲基-1,6-二异氰酸酯、赖氨酸二异氰酸酯、异佛尔酮二异氰酸酯、1,3-双(异氰酸根合甲基)环己烷和4,4’-二环己基甲烷二异氰酸酯中的一种或多种,更优选1,6-六亚甲基二异氰酸酯。
8.根据权利要求1-7任一项所述的弹性聚氨酯树脂原料,其特征在于,所述聚己内酯多元醇为数均分子量在300-2000且平均官能团数在2-3的多元醇化合物的一种或多种。
9.弹性聚氨酯树脂,其特征在于,其是通过使权利要求1-8任一项所述的弹性聚氨酯树脂原料与含有活泼氢基团的化合物进行反应而得到的。
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