CN112442330A - 一种合成革面用热熔胶及其制备方法与应用 - Google Patents

一种合成革面用热熔胶及其制备方法与应用 Download PDF

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CN112442330A
CN112442330A CN202011367282.0A CN202011367282A CN112442330A CN 112442330 A CN112442330 A CN 112442330A CN 202011367282 A CN202011367282 A CN 202011367282A CN 112442330 A CN112442330 A CN 112442330A
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melt adhesive
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陈丙山
王延森
陈勇
蔡玉
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Shandong Huacheng High Tech Adhesive Co ltd
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Abstract

本发明属于化工合成技术领域，具体涉及一种合成革面用单组分聚氨酯热熔胶及其制备方法与应用。本发明提供的合成革面用热熔胶，加入聚酯多元醇，保证后期胶的结晶度，通过聚醚多元醇与异氰酸酯共同作用，保证胶的柔软度；通过异氰酸酯的加入量调控整个胶体系的硬段强度。具有无毒、无污染，能耗小，施工方便，且环保的特点；且合成革面耐磨耐刮、耐酸碱、耐溶剂，机械强度高。

Description

一种合成革面用热熔胶及其制备方法与应用
技术领域
本发明属于化工合成技术领域，具体涉及一种合成革面用单组分聚氨酯热熔胶及其制备方法与应用。
背景技术
我国是世界合成革生产和消费大国。目前全国人造革规模性企业1000多家，主要分布在长江三角洲和珠江三角洲沿海大中型城市，人造革已经成为一些地方的经济支柱性产业。近几年，随着人们生活水平和环保意识的不断提高，消费者对于高性能、高品质、高环保的生态合成革的需求持续上升，然而目前国内合成革的制造主要采用溶剂型聚氨酯或水性聚氨酯，这些表处树脂的制作和使用过程中多少混入有机溶剂，如二甲基甲酰胺、甲苯、丁酮、丙酮等溶剂，造成严重的资源浪费和环境污染。另外，有机溶剂易燃易爆、毒性大、气味大、危害劳动者的身心健康。因此，合成革行业的清洁化生产势在必行。
中国专利CN105401460 A公开了一种无溶剂合成革及其制造方法，其特征是先将由无溶剂聚氨酯、助剂和无溶剂交联剂组成的混合浆料直接涂覆于经预处理的基布上，经热烘箱固化，制得半成品；然后将水性聚氨酯作为面层树脂涂覆于离型纸上，烘干后将其转移到半成品上，再经水性表面处理即可获得环境友好的无溶剂聚氨酯合成革产品。中国专利105401460B以聚氨酯为基础，但制备过程较复杂，施工不方便。
发明内容
针对现阶段合成革工艺复杂等问题，本发明提供了一种合成革面用热熔胶，加入聚酯多元醇，保证后期胶的结晶度，听过聚醚多元醇与异氰酸酯共同作用，保证胶的柔软度；通过异氰酸酯的加入量调控整个胶体系的硬段强度。具有无毒、无污染，能耗小，施工方便，且环保的特点；且合成革面耐磨耐刮、耐酸碱、耐溶剂，机械强度高。
本发明的技术方案如下：
一种合成革面用热熔胶，包括以下重量份数原料：聚酯多元醇100份；聚醚多元醇100—110份；颜料3—4份；手感剂4—5份；抗氧剂0.2—0.4份；催化剂0.3—0.5份；异氰酸酯55—60份。
优选地，所述的聚酯多元醇为乙二醇、丙二醇、己二酸脱水缩合生成的官能度为2、分子量为2000左右的多元醇。
优选地，所述的聚醚多元醇为PTMEG1000和PPG1000。
优选地，所述的颜料为800目—1200目的颜料粉末；所述的手感剂为道康宁羟基硅油8427或DC-51。
优选地，所述的抗氧剂为2,6-二叔丁基-4-甲基苯酚或抗氧剂BHT或抗氧剂T501或抗氧剂264。
优选地，所述的催化剂为吗啉二乙基醚；所述的异氰酸酯为纯MDI。
上述合成革面用热熔胶的制备方法，其特征在于，包括以下步骤：
（1）聚酯多元醇、聚醚多元醇、手感剂和颜料混合，于100—110℃，真空度-0.1—-0.5MPa条件下，脱水1—2小时，至水分含量低于0.1％；
（2）降温至50—55℃，加入抗氧剂、异氰酸酯，升温70—80℃，真空度为-0.5—-0.8MPa条件下反应1.5—2h；
（3）升温至85±10℃，加入催化剂，搅拌10—15min，停止搅拌，充氮气，制得产品。
本发明的另一目的，提供了上述热熔胶在制备合成革上的应用。
优选地，上述热熔胶的使用方法，其特征在于，将所述热熔胶加热至100-110℃涂刮在离型纸上，涂层厚度为0.3—0.4 mm后分别于110 ℃—120℃的烘箱中流平50 s—30s；将基布贴合热压于胶面层上，经湿气固化革纸分离制得成品革。
本申请通过加入聚酯多元醇，保证后期胶的结晶度；聚醚多元醇主要与异氰酸酯共同作用，保证胶的柔软度；另外PTMEG1000的主链是由碳链和醚链组成，柔顺性好，有较好的耐老化性能、力学性能和较好的耐水解性能；PPG1000常温为液态可降低整的胶体系的粘度。颜料建议使用单一色；手感助剂优选含硅油的助剂，可提供革面的爽滑度和亮度。抗氧剂主要是防止胶在加热生产和使用过程中氧化作用。催化剂主要缩短胶的表面干燥时间；通过异氰酸酯的加入量调控整个胶体系的硬段强度。
本发明与现有技术相比，具有如下有益效果：
本发明因使用环保型聚氨酯热熔胶避免了有机溶剂等刺激性气味危害健康的问题，操作过程简便，降低生产线长度；革面层用料为柔软性及好的材料且一步成型，离型纸可以反复使用，大幅度节约成本。
具体实施方式
以下结合实施例对本发明做进一步描述。
实施例1
革面用热熔胶制备：将配方量的聚酯多元醇（乙二醇、丙二醇、己二酸脱水缩合生成的官能度为 2、分子量为2000左右的多元醇）1113g，PTMEG1000 669g ，PPG1000 447g，颜料(炭黑) 42g，手感剂（道康宁羟基硅油8427）51 g，常温加到反应釜中，升温至80℃开启搅拌,升温到110℃，脱水1小时(-0.1MPa真空度)，水分低于0.1％，降温至50℃，加入异氰酸酯(纯MDI) 669 g、抗氧剂 (2,6-二叔丁基-4-甲基苯酚) 3g，升温76℃条件下反应 2h，升温至85℃左右，加入催化剂(吗啉二乙基醚)6 g，搅拌15min，停止搅拌，反应釜充氮气放热熔胶桶（套铝箔纸内袋）制得产品。
合成革的制备：将热熔胶产品烘箱加热至110℃左右涂刮在离型纸上，涂层厚度为0.3 mm后分别于120℃的烘箱中流平30 s；将基布贴合热压于胶面层上，经湿气固化革纸分离制得成品革。
实施例2
革面用热熔胶制备：将配方量的聚酯多元醇（乙二醇、丙二醇、己二酸脱水缩合生成的官能度为 2、分子量为2000左右的多元醇）981g，PTMEG1000 648 g ，PPG1000 492g，颜料(炭黑) 39g，手感剂（道康宁羟基硅油8427）45 g，常温加到反应釜中，升温至80℃开启搅拌,升温到110℃，脱水1小时(-0.1MPa真空度)，水分低于0.1％，降温至50℃，加入异氰酸酯(纯MDI) 786 g、抗氧剂 (2,6-二叔丁基-4-甲基苯酚) 3g，升温76℃条件下反应 2h，升温至85℃左右，加入催化剂(吗啉二乙基醚) 3g，搅拌15min，停止搅拌，反应釜充氮气放热熔胶桶（套铝箔纸内袋）制得产品。
合成革的制备：将热熔胶产品烘箱加热至110℃左右涂刮在离型纸上，涂层厚度为0.3 mm后分别于120℃的烘箱中流平30 s；将基布贴合热压于胶面层上，经湿气固化革纸分离制得成品革。
实施例3
革面用热熔胶制备：制备革面用热熔胶3000g，将配方量的聚酯多元醇（乙二醇、丙二醇、己二酸脱水缩合生成的官能度为 2、分子量为2000左右的多元醇）1074g，PTMEG1000753 g ，PPG1000 375g，颜料(炭黑)42g，手感剂（道康宁羟基硅油8427）48g，常温加到反应釜中，升温至80℃开启搅拌,升温到110℃，脱水1小时(-0.1MPa真空度)，水分低于0.1％，降温至50℃，加入异氰酸酯(纯MDI) 699 g、抗氧剂 (2,6-二叔丁基-4-甲基苯酚)3 g，升温76℃条件下反应 2h，升温至85℃左右，加入催化剂(吗啉二乙基醚)6g，搅拌15min，停止搅拌，反应釜充氮气放热熔胶桶（套铝箔纸内袋）制得产品。
合成革的制备：将热熔胶产品烘箱加热至110℃左右涂刮在离型纸上，涂层厚度为0.3 mm后分别于120℃的烘箱中流平30 s；将基布贴合热压于胶面层上，经湿气固化革纸分离制得成品革。
将实施例1-3得到的产品进行物理性能测试，结果见表1。
表1实施例1-3制品的物理性能表
Figure DEST_PATH_IMAGE001
。

Claims (9)

1.一种合成革面用热熔胶，其特征在于，包括以下重量份数原料：聚酯多元醇100份；聚醚多元醇100—110份；颜料3—4份；手感剂4—5份；抗氧剂0.2—0.4份；催化剂0.3—0.5份；异氰酸酯55—60份。
2.根据权利要求1所述的合成革面用热熔胶，其特征在于，所述的聚酯多元醇为乙二醇、丙二醇、己二酸脱水缩合生成的官能度为 2、分子量为2000左右的多元醇。
3.根据权利要求1所述的合成革面用热熔胶，其特征在于，所述的聚醚多元醇为PTMEG1000和PPG1000。
4.根据权利要求1所述的合成革面用热熔胶，其特征在于，所述的颜料为800目—1200目的颜料粉末；所述的手感剂为道康宁羟基硅油8427或DC-51。
5.根据权利要求1所述的合成革面用热熔胶，其特征在于，所述的抗氧剂为2,6-二叔丁基-4-甲基苯酚或抗氧剂BHT或抗氧剂T501或抗氧剂264。
6.根据权利要求1所述的合成革面用热熔胶，其特征在于，所述的催化剂为吗啉二乙基醚；所述的异氰酸酯为纯MDI。
7.权利要求1所述的合成革面用热熔胶的制备方法，其特征在于，包括以下步骤：
（1）聚酯多元醇、聚醚多元醇、手感剂和颜料混合，于100—110℃，真空度-0.1—-0.5MPa条件下，脱水1—2小时，至水分含量低于0.1％；
（2）降温至50—55℃，加入抗氧剂、异氰酸酯，升温70—80℃，真空度为-0.5—-0.8MPa条件下反应1.5—2h；
（3）升温至85±10℃，加入催化剂，搅拌10—15min，停止搅拌，充氮气，制得产品。
8.权利要求1所述的合成革面用热熔胶或权利要求7的制备方法制备的热熔胶在制备合成革上的应用。
9.根据权利要求8所述的热熔胶在制备合成革上的应用，其特征在于，方法为：将所述热熔胶加热至100—110℃涂刮在离型纸上，涂层厚度为0.3—0.4 mm后分别于110—120℃的烘箱中流平50 s—30 s；将基布贴合热压于胶面层上，经湿气固化革纸分离制得成品革。
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