CN111793202A - 强力手感改善型聚氨酯改性免烫树脂的制备方法 - Google Patents

强力手感改善型聚氨酯改性免烫树脂的制备方法 Download PDF

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CN111793202A
CN111793202A CN202010756535.7A CN202010756535A CN111793202A CN 111793202 A CN111793202 A CN 111793202A CN 202010756535 A CN202010756535 A CN 202010756535A CN 111793202 A CN111793202 A CN 111793202A
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张怀迁
王艾德
齐鹏举
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Zibo Lurui Fine Chemical Co ltd
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Abstract

本发明属于纺织助剂的制备技术领域,具体涉及一种强力手感改善型聚氨酯改性免烫树脂的制备方法。首先采用尿素和甲醛制得二羟甲基脲,然后采用脂肪族二异氰酸酯和封闭剂制得聚氨酯预聚体,将丙二醇聚氧乙烯聚氧丙烯醚、聚氨酯预聚体和催化剂进行反应后,加入二羟甲基脲和二氧六环进行反应,最后加入乙二醛继续反应,反应结束后,加水调整水含量,即得。本发明使用聚氧乙烯聚氧丙烯醚嵌段共聚物和异氰酸酯反应的产物与传统2D树脂交联,聚醚嵌段附着在纤维表面,增强了纤维的润滑性,提高了织物手感,并使纤维在受力时能在有限范围内滑移,从而实现减少强力损失的目的,同时两端多羟基结构确保了树脂与纤维素交联的有效性,仍具有较好的免烫性。

Description

强力手感改善型聚氨酯改性免烫树脂的制备方法
技术领域
本发明属于纺织助剂的制备技术领域,具体涉及一种强力手感改善型聚氨酯改性免烫树脂的制备方法。
背景技术
免烫树脂被广泛应用在衬衣面料、牛仔面料等棉质面料中,能赋予成衣免烫抗皱性能。但传统免烫树脂多采用2D脲醛树脂(二羟甲基二羟基乙烯脲),该种树脂中的羟基能与纤维素羟基反应,在面料表面形成交联网状结构,阻止纤维素的相对滑移,使褶皱不易形成。但纤维素在受到外力时无法通过相对滑移分散力的作用,造成织物强力的降低。同时刚性的脲醛树脂覆盖在织物表面造成手感偏硬,降低了服用性能。
发明内容
本发明要解决的技术问题是:克服现有技术的不足,提供一种强力手感改善型聚氨酯改性免烫树脂的制备方法,使用聚氨酯对2D树脂进行改性,克服现有醚化2D树脂的缺陷,赋予织物相对柔软的手感和更好的强力,同时具有传统树脂的免烫效果。
本发明所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,具体包括以下步骤:
(1)将尿素和甲醛在40~60℃、pH 7.5~9的条件下反应3~5小时,得到无色溶液,将该溶液低温结晶,除去上层溶液后烘干结晶,得到二羟甲基脲;
(2)将脂肪族二异氰酸酯和封闭剂于丙酮中溶解混合后,50℃反应3~5小时,得到聚氨酯预聚体;
(3)将丙二醇聚氧乙烯聚氧丙烯醚加热至160℃并真空蒸馏水分2~4小时,冷却后加入聚氨酯预聚体和催化剂辛酸亚锡在80℃反应2小时,得到脂肪族二异氰酸酯-封闭剂-丙二醇聚氧乙烯聚氧丙烯醚复合物反应液;
(4)向反应液中加入二羟甲基脲和二氧六环,然后120~135℃回流反应3小时,反应结束后真空蒸馏二氧六环,冷却至50℃;
(5)加入乙二醛,在50~60℃、pH 5~7的条件下反应2~3小时,加水调整溶液水含量,即得改性免烫树脂。
优选地,步骤(1)中所述的甲醛为37%的甲醛水溶液,所述的尿素和甲醛的摩尔比为1:2。
优选地,步骤(2)中所述的脂肪族二异氰酸酯为六亚甲基二异氰酸酯或异佛尔酮二异氰酸酯中的一种或两种。
优选地,步骤(2)中所述的封闭剂为甲乙酮肟、甲基异丁基酮肟或3,5-二甲基吡唑中的一种或一种以上。
优选地,步骤(2)中所述的脂肪族二异氰酸酯和封闭剂的摩尔比为1:1.02。
优选地,步骤(3)中所述的丙二醇聚氧乙烯聚氧丙烯醚分子量为5000~8000,其中,聚氧乙烯醚部分占总聚醚摩尔数的50~80%,聚氨酯预聚体与丙二醇聚氧乙烯聚氧丙烯醚的摩尔比为2:1。
优选地,所述的脂肪族二异氰酸酯-封闭剂-丙二醇聚氧乙烯聚氧丙烯醚复合物与二羟甲基脲和乙二醛的摩尔比为1:1.02:1.02。
优选地,步骤(5)中所述的乙二醛为40%的乙二醛水溶液。
优选地,所述的改性免烫树脂产品的水含量为30~50%。
在本发明中,脂肪族二异氰酸酯通过使用封闭剂封闭,控制与丙二醇聚氧乙烯聚氧丙烯醚的反应程度,得到两端是封闭的异氰酸酯集团中间为聚醚的分子,然后在120~135℃封闭剂解封,释放的异氰酸酯集团与二羟甲基脲中的羟基反应,而乙二醛可以与二羟甲基脲中氮原子反应,以增加分子中的羟基等官能团,使之更容易与纤维素中羟基醚化结合。
以异佛尔酮二异氰酸酯、甲乙酮肟作原料为例,说明反应过程如下:
步骤1:
Figure BDA0002611770010000021
步骤2-4:
Figure BDA0002611770010000022
步骤5-6:
Figure BDA0002611770010000031
与现有技术相比,本发明的有益效果如下:
1、本发明分子保留了传统2D树脂的结构,两端多羟基结构确保了树脂与纤维素交联的有效性,使产品仍具有较好的免烫性。
2、本发明使用聚氧乙烯聚氧丙烯醚嵌段共聚物和异氰酸酯反应的产物,与传统2D树脂交联。聚醚嵌段附着在纤维表面,增强了纤维的润滑性,提高了织物手感,并使纤维在受力时能在有限范围内滑移,从而实现减少强力损失的目的。
具体实施方式
下面结合实施例对本发明做进一步的说明。
实施例1
(1)在装有温度计、搅拌器、回流装置、pH探头的容器中,加入70.0g尿素和189.2g37%的甲醛,升温并保持在50℃,用20%氢氧化钠溶液4.3g维持pH 7.5~8.0的条件下反应4小时,得到无色溶液;该溶液<10℃低温结晶,过滤烘干,得到二羟甲基脲;
(2)在装有温度计、搅拌器、回流装置的容器中,加入225.0g异佛尔酮二异氰酸酯、89.9g甲乙酮肟、19.2g丙酮,50℃反应5小时,得到聚氨酯预聚体;
(3)在装有温度计、搅拌器、蒸馏装置的容器中,加入2900.0g丙二醇聚氧乙烯聚氧丙烯醚(聚氧乙烯醚部分占总聚醚摩尔数的60%),加热至160℃并真空蒸馏4小时,然后降温到80℃;
(4)加入330.6g聚氨酯预聚体和0.63g辛酸亚锡到蒸馏后的丙二醇聚氧乙烯聚氧丙烯醚中,80℃反应2小时;
(5)上述反应液中加入122.5g二羟甲基脲、2100.0g二氧六环,然后120℃回流反应3小时,随着反应的进行二羟甲基脲逐渐溶解并参与反应。反应结束后相同温度真空蒸馏二氧六环,冷却至50℃。
(6)加入148.0g 40%乙二醛,在50℃、pH 5.5~6.0的条件下反应3小时,加水调整水含量为38.5±1.5%。
实施例2
(1)在装有温度计、搅拌器、回流装置、pH探头的容器中,加入70.0g尿素和189.2g37%的甲醛,升温并保持在45℃,用20%氢氧化钠溶液4.6g维持pH 8.0~8.5的条件下反应5小时,得到无色溶液;该溶液<10℃低温结晶,过滤烘干,得到二羟甲基脲;
(2)在装有温度计、搅拌器、回流装置的容器中,加入170.0g六亚甲基二异氰酸酯、99.1g 3,5-二甲基吡唑、33.2g丙酮,50℃反应4小时,得到聚氨酯预聚体;
(3)在装有温度计、搅拌器、蒸馏装置的容器中,加入4000.0g丙二醇聚氧乙烯聚氧丙烯醚(聚氧乙烯醚部分占总聚醚摩尔数的70%),加热至160℃并真空蒸馏3小时,然后降温到80℃;
(4)加入299.1g聚氨酯预聚体和0.58g辛酸亚锡到蒸馏后的丙二醇聚氧乙烯聚氧丙烯醚中,80℃反应2小时;
(5)上述反应液中加入122.5g二羟甲基脲、2100.0g二氧六环,然后130℃回流反应3小时,随着反应的进行二羟甲基脲逐渐溶解并参与反应。反应结束后相同温度真空蒸馏二氧六环,冷却至50℃。
(6)加入148.0g40%乙二醛,在55℃、pH 6.0~6.2的条件下反应2小时,加水调整含水量31±1.5%。
本产品的应用性能评价参考如下工艺:
配制如下整理液:树脂100g/L,六水合氯化镁30g/L,渗透剂JFC 1g/L。
纯棉织物在以上整理液中二浸二轧,110℃烘干1分钟,然后150℃烘培3分钟。
免烫效果的测定依据GB/T 3819-1997《纺织品织物折痕回复性的测定——回复角法》;强力的测定依据ASTM D 1424-2009《纺织品的撕破强度标准测试方法》;柔软级别使用Handle-O-Meter柔软度测试仪进行测试。测试结果见表1。
表1实施例1~2制备的改性免烫树脂产品市售醚化2D树脂性能指标对比
项目 折皱回复角 强力(N) 柔软程度
实施例1 227° 8.37 3级
实施例2 232° 8.22 3级
市售醚化2D树脂 239° 6.98 1级
空白样 62° 15.40 4级
由表1可知,折皱回复角数据表明,经过本发明整理的织物,仍能达到与市售树脂相当的免烫水平。织物经过树脂整理后手感都会变硬、柔软程度和强力都会降低,但使用本发明整理后的织物,柔软程度和强力相比市售树脂大大提高,这表面本发明能大大提高免烫织物服用效果。
当然,上述内容仅为本发明的较佳实施例,不能被认为用于限定对本发明的实施例范围。本发明也并不仅限于上述举例,本技术领域的普通技术人员在本发明的实质范围内所做出的均等变化与改进等,均应归属于本发明的专利涵盖范围内。

Claims (10)

1.一种强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:包括以下步骤:
(1)将尿素和甲醛反应后进行结晶,得到二羟甲基脲;
(2)将脂肪族二异氰酸酯和封闭剂于丙酮中溶解混合后进行反应,得到聚氨酯预聚体;
(3)将丙二醇聚氧乙烯聚氧丙烯醚真空蒸馏水分后,加入聚氨酯预聚体和催化剂进行反应,得到脂肪族二异氰酸酯-封闭剂-丙二醇聚氧乙烯聚氧丙烯醚复合物反应液;
(4)向反应液中加入二羟甲基脲和二氧六环进行反应,反应结束后真空蒸馏二氧六环;
(5)加入乙二醛继续反应,反应结束后,加水调整溶液水含量,即得改性免烫树脂。
2.根据权利要求1所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:步骤(1)中所述的尿素和甲醛的摩尔比为1:2。
3.根据权利要求1所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:步骤(2)中所述的脂肪族二异氰酸酯为六亚甲基二异氰酸酯或异佛尔酮二异氰酸酯中的一种或两种。
4.根据权利要求1所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:步骤(2)中所述的封闭剂为甲乙酮肟、甲基异丁基酮肟或3,5-二甲基吡唑中的一种或一种以上。
5.根据权利要求1所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:步骤(2)中所述的脂肪族二异氰酸酯和封闭剂的摩尔比为1:1.02。
6.根据权利要求1所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:步骤(3)中所述的丙二醇聚氧乙烯聚氧丙烯醚分子量为5000~8000,其中,聚氧乙烯醚部分占总聚醚摩尔数的50~80%,聚氨酯预聚体与丙二醇聚氧乙烯聚氧丙烯醚的摩尔比为2:1。
7.根据权利要求1所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:所述的脂肪族二异氰酸酯-封闭剂-丙二醇聚氧乙烯聚氧丙烯醚复合物与二羟甲基脲和乙二醛的摩尔比为1:1.02:1.02。
8.根据权利要求1所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:所述的改性免烫树脂产品的水含量为30~50%。
9.根据权利要求1所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:所述的甲醛为37%的甲醛水溶液,乙二醛为40%的乙二醛水溶液。
10.根据权利要求1所述的强力手感改善型聚氨酯改性免烫树脂的制备方法,其特征在于:包括以下步骤:
(1)将尿素和甲醛在40~60℃、pH 7.5~9的条件下反应3~5小时,得到无色溶液,将该溶液低温结晶,除去上层溶液后烘干结晶,得到二羟甲基脲;
(2)将脂肪族二异氰酸酯和封闭剂于丙酮中溶解混合后,50℃反应3~5小时,得到聚氨酯预聚体;
(3)将丙二醇聚氧乙烯聚氧丙烯醚加热至160℃并真空蒸馏水分2~4小时,冷却后加入聚氨酯预聚体和催化剂辛酸亚锡在80℃反应2小时,得到脂肪族二异氰酸酯-封闭剂-丙二醇聚氧乙烯聚氧丙烯醚复合物反应液;
(4)向反应液中加入二羟甲基脲和二氧六环,然后120~135℃回流反应3小时,反应结束后真空蒸馏二氧六环,冷却至50℃;
(5)加入乙二醛,在50~60℃、pH 5~7的条件下反应2~3小时,加水调整溶液水含量,即得改性免烫树脂。
CN202010756535.7A 2020-07-31 2020-07-31 强力手感改善型聚氨酯改性免烫树脂的制备方法 Withdrawn CN111793202A (zh)

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CN113372562A (zh) * 2021-06-30 2021-09-10 淄博鲁瑞精细化工有限公司 棉织物用高效阳离子改性剂的制备方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113372562A (zh) * 2021-06-30 2021-09-10 淄博鲁瑞精细化工有限公司 棉织物用高效阳离子改性剂的制备方法
CN113372562B (zh) * 2021-06-30 2022-11-22 淄博鲁瑞精细化工有限公司 棉织物用高效阳离子改性剂的制备方法

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