CN109111891B - Htpb改性水性聚氨酯转移胶及其制备方法 - Google Patents

Htpb改性水性聚氨酯转移胶及其制备方法 Download PDF

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CN109111891B
CN109111891B CN201810720003.0A CN201810720003A CN109111891B CN 109111891 B CN109111891 B CN 109111891B CN 201810720003 A CN201810720003 A CN 201810720003A CN 109111891 B CN109111891 B CN 109111891B
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htpb
waterborne polyurethane
byk
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徐勇
赵伟
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Anhui Huiteng Intellectual Property Co ltd
Wuhan Yincaitian Paper Co ltd
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Nanjing University of Science and Technology
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Abstract

本发明公开了一种HTPB改性水性聚氨酯转移胶及其制备方法。所述方法是通过预聚体法将聚合物多元醇、端羟基丁二烯液体橡胶和异氰酸酯反应，加入催化剂，再加入亲水性扩链剂、小分子醇类扩链剂、交联剂、有机溶剂和中和剂，反应后加入去离子水剪切乳化，得到水性聚氨酯乳液；再将该乳液与固化剂、消泡剂、流平剂、润湿剂混合均匀，得到水性聚氨酯转移胶。本发明的HTPB改性水性聚氨酯转移胶具有优异的力学强度，粘结强度大，耐水性、耐酸腐蚀性能好等特点，拉伸强度高达61.2MPa，接触角高到99.4°，剥离强度在195～210N/2.5cm之间，适用于食品、医药、化妆品和办公消费品软包装等领域。

Description

HTPB改性水性聚氨酯转移胶及其制备方法
技术领域
本发明涉及一种HTPB改性水性聚氨酯转移胶及其制备方法，属于水性聚氨酯转移胶技术领域。
背景技术
目前塑料软包装行业在生产过程中，绝大多数都是采用溶剂型聚氨酯，大量的溶剂进入环境中，对操作人员身体造成严重危害，对安全生产构成严重威胁，对环境造成极大危害。
水性聚氨酯转移胶制造的软包装品耐水性、耐酸腐蚀性、低温耐曲折性、力学性能均优于溶剂型，整个制备工艺过程没有溶剂排放，环境友好。水性聚氨酯用于转移胶的制造其技术关键在于开发性能优异的水性聚氨酯来代替溶剂型聚氨酯作为基层、面层和粘接层以及相应的操作控制技术。
中国专利200610032587.X提出了一种水性聚氨酯复合胶的制备方法，采用聚氧化丙烯二醇和聚异氰酸酯作为原料，由于该技术采用的聚氧化丙烯二醇为聚醚，存在结晶性差、粘合强度不高的缺点，不适用于食品包装复合薄膜领域。
中国专利200710133166.0提出了一种水性聚氨酯热溶涂层胶及其制备方法，由于制备的水性聚氨酯没有交联结构，为线型聚合物，且未采用其它树脂改进，存在强度差的缺点。
中国专利200910099528.8提出了一种改性水性聚氨酯树脂及其制备方法，采用聚醚多元醇为原料，存在结晶性差，热熔效果差的缺点，不适合作为粘结层。
中国专利201110027692.5提出了一种耐增塑剂迁移的水性聚氨酯复合胶粘剂及制备方法，主要解决增塑剂的迁移问题，未提及水性聚氨酯的具体制备工艺，对制品粘合牢度、耐水性等方面的改进也未做详细说明。
发明内容
针对目前塑料软包装耐水性、耐酸腐蚀性、粘结力、机械性能差以及不环保等缺点，本发明提供一种端羟基丁二烯液体橡胶(HTPB)改性水性聚氨酯转移胶及其制备方法。
本发明的技术方案如下：
HTPB改性水性聚氨酯转移胶的制备方法，包括如下步骤：
步骤1，HTPB改性水性聚氨酯乳液的合成：
将聚合物多元醇和异氰酸酯混合均匀，以聚合物多元醇、异氰酸酯、亲水性扩链剂、小分子醇类扩链剂、交联剂和中和剂的总质量为总量，按HTPB与总量的质量比为4～8:50，将HTPB加入反应体系，滴加催化剂，在80～90℃下反应2～3h，得到聚氨酯预聚体，降温至70～75℃，加入亲水性扩链剂反应1～2h，升温至80～85℃，加入小分子醇类扩链剂，反应1～1.5h后，加入有机溶剂降低粘度至溶液呈无色，反应1～1.5h，再加入交联剂，反应2～3h，降温至25～30℃，加入中和剂进行中和反应，中和0.5～1h，剪切乳化，反应0.5～1h，旋转蒸发除去有机溶剂后，得到HTPB改性水性聚氨酯乳液；
步骤2，HTPB改性水性聚氨酯转移胶的制备：
在HTPB改性水性聚氨酯乳液中加入固化剂、消泡剂、流平剂和润湿剂，充分分散10～20分钟，得到HTPB改性水性聚氨酯转移胶。
步骤1中，所述的水性聚氨酯乳液按质量百分比包括以下组分：
Figure BDA0001718439860000021
步骤1中，所述的聚合物多元醇选自聚己二酸丁二醇酯二醇、聚己二酸新戊二醇酯二元醇、聚碳酸酯二醇、聚己内酯三醇、聚己二酸乙二醇酯二元醇中的一种。
步骤1中，所述的异氰酸酯选自降冰片烷二异氰酸酯、三甲基-1,6-六亚甲基二异氰酸酯、萘二异氰酸酯、二苯基甲烷-4，4’-二异氰酸酯、四甲基间苯二亚甲基二异氰酸酯、二环己基甲烷二异氰酸酯、二甲基二苯基二异氰酸酯和2-甲基戊烷二异氰酸酯中的一种或几种。
步骤1中，所述的催化剂选自辛酸亚锡或二月桂酸二丁基锡。
步骤1中，所述的有机溶剂选自丙酮或N-甲基吡咯烷酮。
步骤1中，所述的亲水性扩链剂选自二羟甲基丙酸和二羟甲基丁酸中的一种或两种；所述的小分子醇类扩链剂选自螺二醇、二乙基戊二醇、三甲基戊二醇、乙基己二醇、丁基乙基丙二醇和新戊二醇的一种或多种；所述的交联剂选自三乙醇胺、季戊四醇或甘油；所述的中和剂选自三乙胺、氢氧化钠和氨水中的一种。
步骤1中，所述的中和反应的中和度为105％，剪切速度控制在3000r/min。
步骤2中，水性聚氨酯转移胶按质量百分比包括以下组分：
Figure BDA0001718439860000031
步骤2中，所述的固化剂选自型号为Bayhydur3100、Bayhydur XP2487/1、BayhydurXP2547和Bayhydur XP2451中的一种；流平剂选自型号为BYK-361N、BYK-359、BYK-356、BYK-350中的一种；消泡剂选自型号为BYK-110、BYK141、BYK-A530、BYK-019、BYK-021、BYK-024、BYK-093和BYK-1730中的一种；润湿剂选自型号为BYK-W961、BYK-W980、BYK-W985中的一种。
本发明还提供上述制备方法制得的HTPB改性水性聚氨酯转移胶。
与现有技术相比，本发明具有以下优点：
本发明采用HTPB改性水性聚氨酯，解决了水性聚氨酯转移胶结晶性差、粘合牢度不高的问题。同时，提高了水性聚氨酯的交联度，解决了纯线型结构强度不高、耐水、耐酸腐蚀性能差的缺点。本发明加入了润湿剂，解决了现有产品在特殊基材布上润湿性差、粘合力差的缺点。本发明加入的固化剂，后期进一步反应提高了产品的分子量和强度。
综上，本发明制备的HTPB改性水性聚氨酯转移胶具有交联结构，在各种类型基材布上润湿效果好，粘合牢度大，耐水、耐酸腐蚀性能好，拉伸强度高达61.2MPa，接触角高到99.4°，剥离强度在195～210N/2.5cm之间。并且使用起来操作简单，储存稳定，成本较低，可以用于食品、医药、化妆品和办公消费品软包装等领域。
具体实施方式
为更好理解本发明，下面结合实施例对本发明做进一步地详细说明。本发明要求保护的范围并不局限于实施例表示的范围。
对比例1：未改性的水性聚氨转移胶
(1)水性聚氨酯乳液的合成：
原料：
聚己内酯三醇 20.06g
降冰片烷二异氰酸酯 18.94g
二月桂酸二丁基锡 0.2g
二羟甲基丙酸 3g
TCD三环二醇 3.15g
丙酮 10ml
季戊四醇 2.51g
三乙胺 2.34g
去离子水 125g
制备方法：将聚己内酯三元醇和降冰片烷二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到水性聚氨酯乳液。
(2)水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur XP2451、0.2g消泡剂BYK-110、0.1g流平剂BYK-361N和0.5g润湿剂BYK-W961，搅拌20分钟，得到水性聚氨酯转移胶。
对比例2：HTPB改性水性聚氨酯转移胶(HTPB与总量的质量比为2:50)
(1)HTPB改性水性聚氨酯乳液的合成：
原料：
Figure BDA0001718439860000041
Figure BDA0001718439860000051
制备方法：将聚己内酯三元醇和萘二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到HTPB改性水性聚氨酯乳液。
(2)HTPB改性水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur XP2451、0.2g消泡剂BYK-110、0.1g流平剂BYK-361N和0.5g润湿剂BYK-W961，搅拌20分钟，得到HTPB改性水性聚氨酯转移胶。
对比例3：HTPB改性水性聚氨酯转移胶(HTPB与总量的质量比为3:50)
(1)HTPB改性水性聚氨酯乳液的合成：
原料：
Figure BDA0001718439860000052
Figure BDA0001718439860000061
制备方法：将聚己内酯三元醇和二环己基甲烷二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到HTPB改性水性聚氨酯乳液。
(2)HTPB改性水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur XP2451、0.2g消泡剂BYK-110、0.1g流平剂BYK-361N和0.5g润湿剂BYK-W961，搅拌20分钟，得到HTPB改性水性聚氨酯转移胶。
对比例4：HTPB改性水性聚氨酯转移胶(HTPB与总量的质量比为9:50)
(1)HTPB改性水性聚氨酯乳液的合成：
原料：
聚己内酯三醇 21.35g
三甲基-1,6-六亚甲基二异氰酸酯 15.92g
HTPBI 9g
二月桂酸二丁基锡 0.2g
二羟甲基丙酸 3g
TCD三环二醇 4.70g
丙酮 10ml
季戊四醇 2.69g
三乙胺 2.34g
去离子水 125g
制备方法：将聚己内酯三元醇和三甲基-1,6-六亚甲基二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到HTPB改性水性聚氨酯乳液。
(2)HTPB改性水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur XP2451、0.2g消泡剂BYK-110、0.1g流平剂BYK-361N和0.5g润湿剂BYK-W961，搅拌20分钟，得到HTPB改性水性聚氨酯转移胶。
对比例5：HTPB改性水性聚氨酯转移胶(HTPB与总量的质量比为10:50)
(1)HTPB改性水性聚氨酯乳液的合成：
原料：
聚己内酯三醇 14.83g
四甲基间苯二亚甲基二异氰酸酯 23.15g
HTPBI 10g
二月桂酸二丁基锡 0.2g
二羟甲基丙酸 3g
TCD三环二醇 3.46g
丙酮 10ml
季戊四醇 3.22g
三乙胺 2.34g
去离子水 125g
制备方法：将聚己内酯三元醇和四甲基间苯二亚甲基二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到HTPB改性水性聚氨酯乳液。
(2)HTPB改性水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur XP2451、0.2g消泡剂BYK-110、0.1g流平剂BYK-361N和0.5g润湿剂BYK-W961，搅拌20分钟，得到HTPB改性水性聚氨酯转移胶。
实施例1：HTPB改性水性聚氨酯转移胶(HTPB与总量的质量比为4:50)
(1)HTPB改性水性聚氨酯乳液的合成：
原料：
聚己内酯三醇 28.18g
萘二异氰酸酯 10.82g
HTPBI 4g
二月桂酸二丁基锡 0.2g
二羟甲基丙酸 3g
TCD三环二醇 3.35g
丙酮 10ml
季戊四醇 2.31g
三乙胺 2.34g
去离子水 125g
制备方法：将聚己内酯三元醇和二环己基甲烷二异氰酸酯、萘二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到HTPB改性水性聚氨酯乳液。
(2)HTPB改性水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur XP2547、0.2g消泡剂BYK141、0.1g流平剂BYK-359和0.5g润湿剂BYK-W985，搅拌20分钟，得到HTPB改性水性聚氨酯转移胶。
实施例2：HTPB改性水性聚氨酯转移胶(HTPB与总量的质量比为5:50)
(1)HTPB改性水性聚氨酯乳液的合成：
原料：
聚碳酸酯二醇 21.59g
二环己基甲烷二异氰酸酯 16.91g
HTPBI 5g
二月桂酸二丁基锡 0.2g
二羟甲基丙酸 3g
TCD三环二醇 4.05g
丙酮 10ml
季戊四醇 2.11g
三乙胺 2.34g
去离子水 125g
制备方法：将聚己内酯三元醇和二环己基甲烷二异氰酸酯、降冰片烷二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到HTPB改性水性聚氨酯乳液。
(2)HTPB改性水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur XP2487/1、0.2g消泡剂BYK141、0.1g流平剂BYK-350和0.5g润湿剂BYK-W961，搅拌20分钟，得到HTPB改性水性聚氨酯转移胶。
实施例3：HTPB改性水性聚氨酯转移胶(HTPB与总量的质量比为6:50)
(1)HTPB改性水性聚氨酯乳液的合成：
原料：
Figure BDA0001718439860000091
Figure BDA0001718439860000101
制备方法：将聚己内酯三元醇和2-甲基戊烷二异氰酸酯中、萘二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到HTPB改性水性聚氨酯乳液。
(2)HTPB改性水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur3100、0.2g消泡剂BYK-A530、0.1g流平剂BYK-361N和0.5g润湿剂BYK-W961，搅拌20分钟，得到HTPB改性水性聚氨酯转移胶。
实施例4：HTPB改性水性聚氨酯转移胶(HTPB与总量的质量比为7:50)
(1)HTPB改性水性聚氨酯乳液的合成：
原料：
Figure BDA0001718439860000102
Figure BDA0001718439860000111
制备方法：将聚己内酯三元醇和2-甲基戊烷二异氰酸酯中、降冰片烷二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到HTPB改性水性聚氨酯乳液。
(2)HTPB改性水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur XP2451、0.2g消泡剂BYK-1730、0.1g流平剂BYK-356和0.5g润湿剂BYK-W961，搅拌20分钟，得到HTPB改性水性聚氨酯转移胶。
实施例5：HTPB改性水性聚氨酯转移胶(HTPB与总量的质量比为8:50)
(1)HTPB改性水性聚氨酯乳液的合成：
原料：
聚碳酸酯二醇 21.54g
二甲基二苯基二异氰酸酯 16.07g
HTPBI 8g
二月桂酸二丁基锡 0.2g
二羟甲基丙酸 3g
TCD三环二醇 3.58g
丙酮 10ml
季戊四醇 3.47g
三乙胺 2.34g
去离子水 125g
制备方法：将聚己内酯三元醇和二环己基甲烷二异氰酸酯、二甲基二苯基二异氰酸酯混合均匀，加入二月桂酸二丁基锡在88℃下反应3h，得到聚氨酯预聚体，降温至74℃，加入二羟甲基丙酸反应3h，升温至83℃，加入TCD三环二醇，反应1h，加入15ml丙酮来降低反应体系的粘度至溶液呈无色且能顺利搅拌。再加入季戊四醇，反应3h，降温至30℃，加入三乙胺进行中和反应，中和1h，最后加入去离子水剪切乳化，反应1h，旋转蒸发除去丙酮后，得到HTPB改性水性聚氨酯乳液。
(2)HTPB改性水性聚氨酯转移胶的制备：向上述制备的水性聚氨酯乳液中依次加入2.5g固化剂Bayhydur XP2451、0.2g消泡剂BYK-110、0.1g流平剂BYK-361N和0.5g润湿剂BYK-W961，搅拌20分钟，得到HTPB改性水性聚氨酯转移胶。
将对比例1至对比例5和实施例1至实施例5所得的水性聚氨酯转移胶制备成膜。
膜样品的制备：将水性聚氨酯转移胶在聚四氟乙烯模具内流延成膜，膜厚约35μm，自然干燥24h，置于真空烘箱内于50℃真空干燥至恒重，取出置于干燥器内备用。
表1对比例1-5以及实施例1-5胶膜性能测试结果：
Figure BDA0001718439860000121
由上表可以看出，由HTPB改性后的水性聚氨酯转移胶，涂膜后性能得到明显的改善，具有优异的力学性能、耐水性、耐酸腐蚀性和粘结性等。拉伸强度高达61.2MPa，接触角高到99.4°，剥离强度在195～210N/2.5cm之间。
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。

Claims (10)

1.HTPB改性水性聚氨酯转移胶的制备方法，其特征在于，包括如下步骤：
步骤1，HTPB改性水性聚氨酯乳液的合成：
将聚合物多元醇和异氰酸酯混合均匀，以聚合物多元醇、异氰酸酯、亲水性扩链剂、小分子醇类扩链剂、交联剂和中和剂的总质量为总量，按HTPB与总量的质量比为4～8:50，将HTPB加入反应体系，滴加催化剂，在80～90℃下反应2～3h，得到聚氨酯预聚体，降温至70～75℃，加入亲水性扩链剂反应1～2h，升温至80～85℃，加入小分子醇类扩链剂，反应1～1.5h后，加入有机溶剂降低粘度至溶液呈无色，反应1～1.5h，再加入交联剂，反应2～3h，降温至25～30℃，加入中和剂进行中和反应，中和0.5～1h，剪切乳化，反应0.5～1h，旋转蒸发除去有机溶剂后，得到HTPB改性水性聚氨酯乳液；
步骤2，HTPB改性水性聚氨酯转移胶的制备：
在HTPB改性水性聚氨酯乳液中加入固化剂、消泡剂、流平剂和润湿剂，充分分散10～20分钟，得到HTPB改性水性聚氨酯转移胶。
2.根据权利要求1所述的制备方法，其特征在于，步骤1中，所述的水性聚氨酯乳液按质量百分比包括以下组分：
Figure FDA0002732182310000011
3.根据权利要求1所述的制备方法，其特征在于，步骤1中，所述的聚合物多元醇选自聚己二酸丁二醇酯二醇、聚己二酸新戊二醇酯二元醇、聚碳酸酯二醇、聚己内酯三醇、聚己二酸乙二醇酯二元醇中的一种。
4.根据权利要求1所述的制备方法，其特征在于，步骤1中，所述的异氰酸酯选自降冰片烷二异氰酸酯、三甲基-1,6-六亚甲基二异氰酸酯、萘二异氰酸酯、二苯基甲烷-4，4’-二异氰酸酯、四甲基间苯二亚甲基二异氰酸酯、二环己基甲烷二异氰酸酯、二甲基二苯基二异氰酸酯和2-甲基戊烷二异氰酸酯中的一种或几种。
5.根据权利要求1所述的制备方法，其特征在于，步骤1中，所述的催化剂选自辛酸亚锡或二月桂酸二丁基锡；所述的有机溶剂选自丙酮或N-甲基吡咯烷酮；所述的亲水性扩链剂选自二羟甲基丙酸和二羟甲基丁酸中的一种或两种；所述的小分子醇类扩链剂选自螺二醇、二乙基戊二醇、三甲基戊二醇、乙基己二醇、丁基乙基丙二醇和新戊二醇的一种或多种。
6.根据权利要求1所述的制备方法，其特征在于，步骤1中，所述的交联剂选自三乙醇胺、季戊四醇或甘油；所述的中和剂选自三乙胺、氢氧化钠和氨水中的一种。
7.根据权利要求1所述的制备方法，其特征在于，步骤1中，所述的中和反应的中和度为105％，剪切速度控制在3000r/min。
8.根据权利要求1所述的制备方法，其特征在于，步骤2中，水性聚氨酯转移胶按质量百分比包括以下组分：
Figure FDA0002732182310000021
9.根据权利要求1所述的制备方法，其特征在于，步骤2中，所述的固化剂选自型号为Bayhydur3100、Bayhydur XP2487/1、Bayhydur XP2547和Bayhydur XP2451中的一种；流平剂选自型号为BYK-361N、BYK-359、BYK-356、BYK-350中的一种；消泡剂选自型号为BYK-110、BYK141、BYK-A530、BYK-019、BYK-021、BYK-024、BYK-093和BYK-1730中的一种；润湿剂选自型号为BYK-W961、BYK-W980、BYK-W985中的一种。
10.根据权利要求1至9任一所述的制备方法制得的HTPB改性水性聚氨酯转移胶。
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