CN112194891A - 一种低成本高强tpu薄膜及其制备方法 - Google Patents
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Abstract
本发明公开一种低成本高强TPU薄膜及其制备方法,该薄膜由聚碳酸亚已酯二醇PCDL、二苯基甲烷二异氰酸酯MDI、催化剂、阻燃剂、扩链剂、热塑性聚氨酯TPU、聚醚多元醇组成。该发明选用一种新型多元醇树脂‑聚碳酸亚内酯PPC与热塑性聚氨酯TPU为原料,制备出PPC‑TPU混合膜,该工艺原料成本低,且能对CO2综合利用,制备过程简单,制备出的TPU薄膜,具有较好耐低温、耐磨、抗静电性能,并赋予柔软性、耐气候性能,提升了TPU薄膜的升值空间,同时节约了资源,又保护了环境。
Description
技术领域
本发明涉及一种TPU薄膜制品及其制备技术领域,特别是涉及一种低成本高强度TPU薄膜及其制备方法。
背景技术
热塑性聚氨酯(TPU)是由二苯甲烷二异氰酸酯、甲苯二异氰酸酯和大分子多元醇、扩链剂共同反应聚合二次的线性高分子材料。在应用于汽车的塑料中, TPU薄膜用量和应用范围时最大的,包括车漆、汽车座椅、天窗、隔音降噪材料等,但制造的成本较高。同时虽然TPU具有橡胶和塑料的优良特性,即耐低温、耐磨、易熔接、气密性好以及较低的吸水性。然而,由于TPU摩擦阻力强,其产品手感较为粗糙,且成型性较差,强度低。故有待解决。
发明内容
针对上述现有技术存在的问题,本发明提供一种TPU薄膜制品及其制备技术领域,通过加入聚碳酸亚内酯(PPC),改变TPU各个反应组分的比例,采用流延工艺,获得具有互补特性的车用TPU薄膜。
为了实现上述目的,本发明采用的技术方案是:一种低成本高强TPU薄膜,所述的TPU薄膜由以下质量份的原料组成:聚碳酸亚已酯二醇PCDL 20-35份、二苯基甲烷二异氰酸酯MDI 18-30份、催化剂0.005-0.01份、阻燃剂0.01-0.02份、扩链剂0.04-0.06份、热塑性聚氨酯TPU 35-50份、聚醚多元醇5-8份。
进一步的,所述催化剂为辛酸亚锡。
进一步的,所述阻燃剂为甲基磷酸二甲酯。
进一步的,所述扩链剂为1-4-丁二醇.
一种低成本高强TPU薄膜的制备方法,包括以下步骤;
步骤一:PPC弹性体制备:将PCDL真空干燥,随后与MDI以及催化剂在一定温度下保温反应2-3小时;随后加入阻燃剂以及扩链剂,真空脱气反应3-5 分钟,倒入预热好的模具,烘箱固化熟化16-24小时后,破碎造粒,制得PPC弹性体;
步骤二:PPC-TPU熔融共混:将TPU及PPC弹性体真空干燥,按照一定比例加入到高速混合机,并加入一定量的聚醚多元醇,高速混合2-5分钟,随后加入到密炼机,熔融混合,冷却粉碎,得到PPC-TPU共混物;
步骤三:TPU薄膜制备:将PPC-TPU共混物熔融挤出,并加入适量的稀释剂、成膜助剂,搅拌均匀,倒入流延机装置中,并设置好胶辊温度,对PPC-TPU共混粒子进行辊压成型,得到TPU薄膜成品。
进一步的,所述步骤一种的聚碳酸亚已酯二醇PCDL数均分子量Mn为2000~3000;步骤一种的真空脱气反应的压力为-0.4 — -0.2Kpa;步骤一所述的固化熟化工艺为70-85℃固化8-12小时,随后100℃熟化8-12小时。
进一步的,所述步骤二所述的热塑性聚氨酯TPU的分子量为23000-33000;步骤二所述的聚醚多元醇为聚氧化丙烯三醇或聚四氢呋喃二醇的一种或两种的组合,聚醚多元醇数均分子量Mn为1500-2000;步骤二所述的密炼机参数:密炼温度130-150℃,转速35-50 r/min,搅拌反应3-8分钟。
进一步的,步骤三所述的PPC-TPU共混物、甲乙酮、乙二醇苯醚质量比为75-85:15-25:1-2;步骤三所述的流延机内部温度为175-205℃,胶辊温度为35-40℃;步骤三所述的TPU薄膜成品厚度为0.06毫米。
进一步的,步骤三所述稀释剂为丁酮、丙酮、甲乙酮、四氢呋喃、甲苯其中的一种或者多种组合。
进一步的,步骤三所述成膜助剂为乙二醇苯醚或者丙二醇苯醚其中的一种。
本发明的有益效果是:该发明选用一种新型多元醇树脂-聚碳酸亚内酯(PPC)与热塑性聚氨酯(TPU)为原料,制备出PPC-TPU混合膜,该工艺原料成本低,且能对CO2综合利用,制备过程简单,制备出的TPU薄膜,具有较好耐低温、耐磨、抗静电性能,并赋予柔软性、耐气候性能,提升了TPU薄膜的升值空间,同时节约了资源,又保护了环境。
附图说明
图1为本发明的TPU薄膜质量参数表;
图2为本发明的红外光谱图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明了,下面通过附图及实施例,对本发明进行进一步详细说明。但是应该理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限制本发明的范围。
除非另有定义,本文所使用的所有的技术术语和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同,本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本发明。
实施例一,参照图1和图2,一种低成本高强TPU薄膜及其制备方法,所述的TPU薄膜由以下质量份的原料组成:聚碳酸亚已酯二醇(PCDL) 20份、二苯基甲烷二异氰酸酯(MDI)20份、催化剂0.008份、阻燃剂0.01份、扩链剂0.05份、热塑性聚氨酯(TPU) 40份、聚醚多元醇6份。所述催化剂为辛酸亚锡,所述阻燃剂为甲基磷酸二甲酯,起到阻燃、抗紫外老化功能,所述扩链剂为1-4-丁二醇,所述低成本高强TPU薄膜的具体制备过程为:
(1)PPC弹性体制备:将PCDL真空干燥,随后与MDI以及辛酸亚锡在75℃下保温反应2小时,搅拌速率为400 r/min;随后加入甲基磷酸二甲酯以及1-4-丁二醇,真空脱气反应5分钟,倒入预热好的模具, 75℃固化8小时,100℃熟化12小时后,破碎造粒,制得PPC弹性体。
(2)PPC-TPU熔融共混:将TPU及PPC弹性体真空干燥,确保无水分,按照1:1的比例加入到高速混合机,并加入6个质量份的聚醚多元醇,高速混合3分钟,随后加入到密炼机,熔融混合,冷却粉碎,得到PPC-TPU共混物。
(3)TPU薄膜制备:将PPC-TPU共混物熔融挤出,并加入适量的甲乙酮以及乙二醇苯醚,搅拌均匀,倒入流延机装置中,并设置好胶辊温度,对PPC-TPU共混粒子进行辊压成型,得到TPU薄膜成品。
步骤一所述聚碳酸亚已酯二醇(PCDL)数均分子量Mn为2000;步骤一所述的真空脱气反应,压力为-0.4 Kpa。
步骤二中所述的TPU分子量为33000;步骤二中所述的聚醚多元醇为聚氧化丙烯三醇,数均分子量Mn为2000;步骤二中所述的密炼机参数:密炼温度130℃,转速40 r/min,搅拌反应5分钟。
步骤三中所述的PPC-TPU共混物、甲乙酮、乙二醇苯醚质量比为:80:18:2;步骤三中所述的流延机内部温度为175-205℃,胶辊温度为35-40℃;步骤三中所述的TPU薄膜成品厚度为0.06毫米。
该发明选用一种新型多元醇树脂-聚碳酸亚内酯(PPC)与热塑性聚氨酯(TPU)为原料,制备出PPC-TPU混合膜,该工艺原料成本低,且能对CO2综合利用,制备过程简单,制备出的TPU薄膜,具有较好耐低温、耐磨、抗静电性能,并赋予柔软性、耐气候性能,提升了TPU薄膜的升值空间,同时节约了资源,又保护了环境
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换或改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种低成本高强TPU薄膜,其特征在于,所述的TPU薄膜由以下质量份的原料组成:聚碳酸亚已酯二醇PCDL 20-35份、二苯基甲烷二异氰酸酯MDI 18-30份、催化剂0.005-0.01份、阻燃剂0.01-0.02份、扩链剂0.04-0.06份、热塑性聚氨酯TPU 35-50份、聚醚多元醇5-8份。
2.根据权利要求1所述的一种低成本高强TPU薄膜,其特征在于,所述催化剂为辛酸亚锡。
3.根据权利要求1所述的一种低成本高强TPU薄膜,其特征在于,所述阻燃剂为甲基磷酸二甲酯。
4.根据权利要求1所述的一种低成本高强TPU薄膜,其特征在于,所述扩链剂为1-4-丁二醇。
5.一种低成本高强TPU薄膜的制备方法,其特征在于,包括以下步骤;
步骤一:PPC弹性体制备:将PCDL真空干燥,随后与MDI以及催化剂在一定温度下保温反应2-3小时;随后加入阻燃剂以及扩链剂,真空脱气反应3-5 分钟,倒入预热好的模具,烘箱固化熟化16-24小时后,破碎造粒,制得PPC弹性体;
步骤二:PPC-TPU熔融共混:将TPU及PPC弹性体真空干燥,按照一定比例加入到高速混合机,并加入一定量的聚醚多元醇,高速混合2-5分钟,随后加入到密炼机,熔融混合,冷却粉碎,得到PPC-TPU共混物;
步骤三:TPU薄膜制备:将PPC-TPU共混物熔融挤出,并加入适量的稀释剂、成膜助剂,搅拌均匀,倒入流延机装置中,并设置好胶辊温度,对PPC-TPU共混粒子进行辊压成型,得到TPU薄膜成品。
6.根据权利要求5所述的一种低成本高强TPU薄膜的制备方法,其特征在于,所述步骤一种的聚碳酸亚已酯二醇PCDL数均分子量Mn为2000~3000;步骤一种的真空脱气反应的压力为-0.4 — -0.2Kpa;步骤一所述的固化熟化工艺为70-85℃固化8-12小时,随后100℃熟化8-12小时。
7.根据权利要求5所述的一种低成本高强TPU薄膜的制备方法,其特征在于,所述步骤二所述的热塑性聚氨酯TPU的分子量为23000-33000;步骤二所述的聚醚多元醇为聚氧化丙烯三醇或聚四氢呋喃二醇的一种或两种的组合,聚醚多元醇数均分子量Mn为1500-2000;步骤二所述的密炼机参数:密炼温度130-150℃,转速35-50 r/min,搅拌反应3-8分钟。
8.根据权利要求5所述的一种低成本高强TPU薄膜的制备方法,其特征在于,步骤三所述的PPC-TPU共混物、甲乙酮、乙二醇苯醚质量比为75-85:15-25:1-2;步骤三所述的流延机内部温度为175-205℃,胶辊温度为35-40℃;步骤三所述的TPU薄膜成品厚度为0.06毫米。
9.根据权利要求5所述的一种低成本高强TPU薄膜的制备方法,其特征在于,步骤三所述稀释剂为丁酮、丙酮、甲乙酮、四氢呋喃、甲苯其中的一种或者多种组合。
10.根据权利要求5所述的一种低成本高强TPU薄膜的制备方法,其特征在于,步骤三所述成膜助剂为乙二醇苯醚或者丙二醇苯醚其中的一种。
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