CN111763344A - 一种阻燃聚氨酯发泡材料生产方法 - Google Patents
一种阻燃聚氨酯发泡材料生产方法 Download PDFInfo
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Abstract
本发明实施例公开了一种阻燃聚氨酯发泡材料生产方法,将聚酯多元醇、淀粉、聚磷酸铵、季戊四醇以及水加入到反应釜中,混合均匀;将异氰酸酯加入到上述反应釜,在氮气保护下加热反应;将上述反应釜降温,加入催化剂、以及扩链剂,保温;将稳定剂加入到上述反应釜,搅拌均匀后装入到喷射机一中,并加热备用;准备粉煤灰和陶瓷粉装入喷射机二中混匀;准备酚醛树脂、三聚氰胺溶于乙醇中,装入喷射机三中;喷射机一和喷射机二设置在模具上方,且喷射机一和喷射机二间隔设置,喷射机三对称设于模具两侧,喷射机一、喷射机二和喷射机三均加热并朝向模具喷射,模具压力为0.5‑3MPa;将模具在2min内急速降温至30℃,并保温,固化得到聚氨酯发泡材料。
Description
技术领域
本发明实施例涉及聚氨酯发泡材料生产技术领域,具体涉及一种阻燃聚氨酯发泡材料生产方法。
背景技术
聚氨酯为主链含-NHCOO-重复结构单元的一类聚合物,英文缩写PU,由异氰酸酯(单体)与羟基化合物聚合而成。聚氨酯含有强极性的氨基甲酸酯基,不溶于非极性基团,具有良好的耐油性、韧性、耐磨性、耐老化性和粘合性。用不同原料可制得适应较宽温度范围(-50-150℃)的材料,包括泡棉、胶粘剂、热塑性树脂和热固性树脂等。
现有技术中,随着电子产品和汽车产品等的不断发展,对聚氨酯发泡材料的应用越来越多,特别是对具有一定机械强度的聚氨酯发泡材料的需求不断增大。专利号为201710322608.X的授权发明专利,研究了高密度聚氨酯泡棉的配方和生产方法,并且制得了具有密度均匀性好,减震缓冲性能优越得高密度聚氨酯泡棉,解决了现有技术中聚氨酯泡棉机械性能差的问题。但是,随着产品的不断发展,对聚氨酯发泡材料的阻燃性的要求也在不断提高,现有的配方和生产方法,仅能够达到暂时阻燃的效果,随着长时间在高温环境下,其阻燃性能逐渐降低,难以达到特殊环境下的使用要求。
因此,申请人在专利号为201710322608.X的授权发明专利基础上进行配方和工艺的改进,经过验证,在保持原有特性的基础上,进一步提高了聚氨酯发泡材料的阻燃性能,扩大了产品的应用范围。
发明内容
为此,本发明实施例提供一种阻燃聚氨酯发泡材料生产方法,以解决现有技术中存在的相关技术问题。
为了实现上述目的,本发明实施例提供如下技术方案:
一种阻燃聚氨酯发泡材料生产方法,包括以下步骤:
步骤一:将60-80重量份聚酯多元醇、20-40重量份淀粉、1-5重量份聚磷酸铵、1-3重量份季戊四醇以及2-5重量份水加入到反应釜中,混合均匀,其中聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的混合物,且聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的质量比为3:1;
步骤二:将15-25重量份异氰酸酯加入到步骤一中所述反应釜,在氮气保护下加热80-90℃反应2-4小时,所述异氰酸酯为1,5-萘二异氰酸酯;
步骤三:将步骤二中所述反应釜降温至50-60℃,加入0.5-2重量份催化剂、以及4-8重量份扩链剂,保温3-5小时;
步骤四:将1-3重量份稳定剂加入到步骤三中反应釜,搅拌均匀后装入到喷射机一中,并加热至100℃备用;
步骤五:准备2-5重量份粉煤灰和2-5重量份陶瓷粉装入喷射机二中混匀,并加热至100℃备用;
步骤六:准备2-5重量份酚醛树脂、1-3重量份三聚氰胺溶于乙醇中,装入喷射机三中,并加热至100℃备用;
步骤七:准备成型模具,喷射机一和喷射机二设置在模具上方,且喷射机一和喷射机二间隔设置,喷射机三对称设于模具两侧,喷射机一、喷射机二和喷射机三均加热至120℃并朝向模具喷射,模具压力为0.5-3MPa,聚氨酯发泡材料厚度为20mm-30mm;
步骤八:将模具在2min内急速降温至30℃,并保温30-40min,固化得到聚氨酯发泡材料。
进一步地,所述步骤三中催化剂为辛酸亚锡或二丁基锡二月桂酸酯。
进一步地,所述步骤三中扩链剂包括1,4-丁二醇、乙二醇、一缩二乙二醇、乙二胺、二乙烯二胺、三乙烯四胺中的一种或多种的组合。
进一步地,所述步骤四中稳定剂为硅油。
本发明实施例具有如下优点:
本发明将淀粉和聚酯多元醇进行预先混合,淀粉作为含有大量羟基的葡萄糖聚合物,与聚酯多元醇相容性高,预先混合使得其与异氰酸酯发生亲和加成反应时,反应更充分,利用聚酯多元醇和淀粉协同作用,可以提高聚氨酯的密度,并保证密度的均匀性,同时改善其回弹力;
本发明提供了利用混合聚酯多元醇和异氰酸酯反应,混合聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇,聚己二酸乙二醇丁二醇酯是一种混合二元醇聚酯,它的使用减小了聚氨酯的结晶性,增加聚氨酯的初黏强度,聚碳酸酯二醇具有良好的耐水解性和耐氧化性,二者混合使用时,可以提高聚氨酯泡棉的性能;
本发明中聚磷酸铵和季戊四醇的加入,能够显著改善聚氨酯发泡材料的阻燃性能,特别是在聚氨酯泡棉的机械强度较高时,使得聚氨酯发泡材料的阻燃性能提高;同时,还设置了酚醛树脂和三聚氰胺作为阻燃材料成分,其使用时喷射在聚氨酯发泡材料的上下两端面,形成了阻燃防护层效果,同时在聚氨酯发泡材料的中间也形成一层防护层,这样就使聚氨酯发泡材料结构更加稳定,同时增强阻燃防护效果。
本发明创造性的引入了粉煤灰和陶瓷粉,通过与淀粉、聚酯多元醇、聚磷酸铵和季戊四醇的同时喷射,直接混入到聚氨酯泡棉的生产结构中,粉煤灰能够吸收淀粉和聚酯多元醇反应混合物中的水分,与陶瓷粉配合,加速聚氨酯泡棉的固定过程,大大改善了聚氨酯泡棉的物理性能。
具体实施方式
以下由特定的具体实施例说明本发明的实施方式,熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
为了解决现有技术中存在的相关技术问题,本申请实施例提供了一种阻燃聚氨酯发泡材料生产方法,旨在提供一种机械强度较高,阻燃能力强的聚氨酯发泡材料,其生产包括以下步骤:
步骤一:将60-80重量份聚酯多元醇、20-40重量份淀粉、1-5重量份聚磷酸铵、1-3重量份季戊四醇以及2-5重量份水加入到反应釜中,混合均匀,其中聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的混合物,且聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的质量比为3:1。具体的,聚己二酸乙二醇丁二醇酯由己二酸、乙二醇和丁二醇反应合成,作为一种混合二元醇聚酯,它的使用减小了聚氨酯的结晶性;聚碳酸酯二醇为一种白色蜡状固体,羟值为100mg KOH/g,可提供内聚力大,粘接强度高的预聚体。淀粉是一种多羟基葡萄糖聚合物,结构都含有丰富的羟基,可以部分代替聚酯多元醇与异氰酸酯发生反应制备聚氨酯,淀粉与聚酯多元醇混合均匀再进行反应时,协同效应显著。
同时,在本步骤中,还加入了聚磷酸铵和季戊四醇的阻燃材料,并通过合理配比,加入到聚氨酯发泡材料中,能够显著改善聚氨酯发泡材料的阻燃性能,特别是在聚氨酯泡棉的机械强度较高时,使得聚氨酯发泡材料的阻燃性能提高。
步骤二:将15-25重量份异氰酸酯加入到步骤一中所述反应釜,在氮气保护下加热80-90℃反应2-4小时,所述异氰酸酯为1,5-萘二异氰酸酯;所述异氰酸酯为1,5-萘二异氰酸酯(1,5-naphthalene diisocyanate,简称NDI),NDI熔点较高,分子的刚性、规整性和对称性高,可以从根本上提高聚氨酯的相分离程度,使得聚氨酯获得更为优异的机械性能和物理性能,其制品具有高强度、回弹性能优良等特性,是最佳的减震密封材料。聚酯多元醇和异氰酸酯反应,水作为发泡剂,反应放出二氧化碳成为泡核,使反应混合物膨胀,得到具有开孔结构的泡沫。另外氮气保护使得反应过程中各原料不易被空气氧化,可提高制得的聚氨酯材料的稳定性。
步骤三:将步骤二中所述反应釜降温至50-60℃,加入0.5-2重量份催化剂、以及4-8重量份扩链剂,保温3-5小时;所述催化剂为辛酸亚锡,用于调节发泡反应和凝胶反应的速度,使之处于良好的平衡状态,提高产品生产效率;所述扩链剂为1,4-丁二醇,1,4-丁二醇与预聚体中的异氰酸酯基团反应,生产氨基甲酸酯或脲,起扩链或交联作用。辛酸亚锡和1,4-丁二醇并用可获得最佳的泡孔结构。
步骤四:将1-3重量份稳定剂加入到步骤三中反应釜,搅拌均匀后装入到喷射机一中,并加热至100℃备用。
步骤五:准备2-5重量份粉煤灰和2-5重量份陶瓷粉装入喷射机二中混匀,并加热至100℃备用;粉煤灰能够快速吸收聚氨酯发泡材料中的水分,加速发泡材料的固化速度。同时,陶瓷粉能够显著提高聚氨酯泡棉的机械强度,可与上述粉煤灰进行配合,采用喷射方式进入到聚氨酯发泡材料内。
步骤六:准备2-5重量份酚醛树脂、1-3重量份三聚氰胺溶于乙醇中,装入喷射机三中,并加热至100℃备用;酚醛树脂和三聚氰胺作为阻燃材料成分,其使用时喷射在聚氨酯发泡材料的上下两端面,形成了阻燃防护层效果,同时在聚氨酯发泡材料的中间也形成一层防护层,这样就使聚氨酯发泡材料结构更加稳定,同时增强阻燃防护效果。
步骤七:准备成型模具,喷射机一和喷射机二设置在模具上方,且喷射机一和喷射机二间隔设置,喷射机三对称设于模具两侧,喷射机一、喷射机二和喷射机三均加热至120℃并朝向模具喷射,模具压力为0.5-3MPa,聚氨酯发泡材料厚度为20mm-30mm。其具体在生产时,首先通过喷射机三向模具底部喷射一定厚度的酚醛树脂和三聚氰胺混合物,形成下端的阻燃防护层结构;然后,喷射机一和喷射机二逐渐向模具内喷射聚氨酯发泡材料的混合物与粉煤灰和陶瓷粉的混合物;并在达到聚氨酯发泡材料预定厚度一半时,再次开启喷射机三,形成中间阻燃防护层,继续按照上述步骤,在聚氨酯发泡材料上端面喷洒酚醛树脂和三聚氰胺,形成上端阻燃防护层。因此,生产的聚氨酯发泡材料通过粉煤灰、陶瓷粉等与酚醛树脂和三聚氰胺形成网格结构,在提高机械强度的基础上,还提高了其阻燃性能。
步骤八:将模具在2min内急速降温至30℃,并保温30-40min,固化得到聚氨酯发泡材料。
进一步地,所述步骤三中催化剂为辛酸亚锡或二丁基锡二月桂酸酯。
进一步地,所述步骤三中扩链剂包括1,4-丁二醇、乙二醇、一缩二乙二醇、乙二胺、二乙烯二胺、三乙烯四胺中的一种或多种的组合。
进一步地,所述步骤四中稳定剂为硅油。可降低发泡体系混合料的表面张力,从而稳定泡孔,防止泡沫倒塌,并控制抛空的大小和均匀度。
基于上述工艺步骤,本申请为了更好的说明其生产的聚氨酯发泡材料的阻燃性能和机械强度,提供了如下实施例和对比例。
实施例1
本实施例提供了一种阻燃聚氨酯发泡材料生产方法,包括以下步骤:
步骤一:将60重量份聚酯多元醇、40重量份淀粉、1重量份聚磷酸铵、3重量份季戊四醇以及2重量份水加入到反应釜中,混合均匀,其中聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的混合物,且聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的质量比为3:1。
步骤二:将15重量份异氰酸酯加入到步骤一中所述反应釜,在氮气保护下加热80℃反应4小时,所述异氰酸酯为1,5-萘二异氰酸酯。
步骤三:将步骤二中所述反应釜降温至60℃,加入0.5重量份催化剂、以及4重量份扩链剂,保温4小时;
步骤四:将1重量份稳定剂加入到步骤三中反应釜,搅拌均匀后装入到喷射机一中,并加热至100℃备用;
步骤五:准备5重量份粉煤灰和2重量份陶瓷粉装入喷射机二中混匀,并加热至100℃备用;
步骤六:准备2重量份酚醛树脂、3重量份三聚氰胺溶于乙醇中,装入喷射机三中,并加热至100℃备用;
步骤七:准备成型模具,喷射机一和喷射机二设置在模具上方,且喷射机一和喷射机二间隔设置,喷射机三对称设于模具两侧,喷射机一、喷射机二和喷射机三均加热至120℃并朝向模具喷射,模具压力为0.5MPa,聚氨酯发泡材料厚度为30mm。
步骤八:将模具在2min内急速降温至30℃,并保温40min,固化得到聚氨酯发泡材料。
实施例2
本实施例提供了一种阻燃聚氨酯发泡材料生产方法,包括以下步骤:
步骤一:将65重量份聚酯多元醇、35重量份淀粉、2重量份聚磷酸铵、3重量份季戊四醇以及3重量份水加入到反应釜中,混合均匀,其中聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的混合物,且聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的质量比为3:1。
步骤二:将18重量份异氰酸酯加入到步骤一中所述反应釜,在氮气保护下加热80℃反应4小时,所述异氰酸酯为1,5-萘二异氰酸酯。
步骤三:将步骤二中所述反应釜降温至60℃,加入0.8重量份催化剂、以及5重量份扩链剂,保温5小时;
步骤四:将1重量份稳定剂加入到步骤三中反应釜,搅拌均匀后装入到喷射机一中,并加热至100℃备用;
步骤五:准备3重量份粉煤灰和4重量份陶瓷粉装入喷射机二中混匀,并加热至100℃备用;
步骤六:准备4重量份酚醛树脂、3重量份三聚氰胺溶于乙醇中,装入喷射机三中,并加热至100℃备用;
步骤七:准备成型模具,喷射机一和喷射机二设置在模具上方,且喷射机一和喷射机二间隔设置,喷射机三对称设于模具两侧,喷射机一、喷射机二和喷射机三均加热至120℃并朝向模具喷射,模具压力为1MPa,聚氨酯发泡材料厚度为30mm;
步骤八:将模具在2min内急速降温至30℃,并保温30min,固化得到聚氨酯发泡材料。
实施例3
本实施例提供了一种阻燃聚氨酯发泡材料生产方法,包括以下步骤:
步骤一:将70重量份聚酯多元醇、30重量份淀粉、3重量份聚磷酸铵、2重量份季戊四醇以及4重量份水加入到反应釜中,混合均匀,其中聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的混合物,且聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的质量比为3:1。
步骤二:将21重量份异氰酸酯加入到步骤一中所述反应釜,在氮气保护下加热90℃反应2小时,所述异氰酸酯为1,5-萘二异氰酸酯。
步骤三:将步骤二中所述反应釜降温至50℃,加入2重量份催化剂、以及6重量份扩链剂,保温3小时;
步骤四:将1重量份稳定剂加入到步骤三中反应釜,搅拌均匀后装入到喷射机一中,并加热至100℃备用;
步骤五:准备4重量份粉煤灰和3重量份陶瓷粉装入喷射机二中混匀,并加热至100℃备用;
步骤六:准备4重量份酚醛树脂、2重量份三聚氰胺溶于乙醇中,装入喷射机三中,并加热至100℃备用;
步骤七:准备成型模具,喷射机一和喷射机二设置在模具上方,且喷射机一和喷射机二间隔设置,喷射机三对称设于模具两侧,喷射机一、喷射机二和喷射机三均加热至120℃并朝向模具喷射,模具压力为1.7MPa,聚氨酯发泡材料厚度为30mm;
步骤八:将模具在2min内急速降温至30℃,并保温30min,固化得到聚氨酯发泡材料。
实施例4
本实施例提供了一种阻燃聚氨酯发泡材料生产方法,包括以下步骤:
步骤一:将75重量份聚酯多元醇、25重量份淀粉、4重量份聚磷酸铵、2重量份季戊四醇以及5重量份水加入到反应釜中,混合均匀,其中聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的混合物,且聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的质量比为3:1。
步骤二:将23重量份异氰酸酯加入到步骤一中所述反应釜,在氮气保护下加热80℃反应4小时,所述异氰酸酯为1,5-萘二异氰酸酯。
步骤三:将步骤二中所述反应釜降温至60℃,加入1.5重量份催化剂、以及8重量份扩链剂,保温3小时;
步骤四:将2重量份稳定剂加入到步骤三中反应釜,搅拌均匀后装入到喷射机一中,并加热至100℃备用;
步骤五:准备4重量份粉煤灰和3重量份陶瓷粉装入喷射机二中混匀,并加热至100℃备用;
步骤六:准备5重量份酚醛树脂、2重量份三聚氰胺溶于乙醇中,装入喷射机三中,并加热至100℃备用;
步骤七:准备成型模具,喷射机一和喷射机二设置在模具上方,且喷射机一和喷射机二间隔设置,喷射机三对称设于模具两侧,喷射机一、喷射机二和喷射机三均加热至120℃并朝向模具喷射,模具压力为2.4MPa,聚氨酯发泡材料厚度为30mm。
步骤八:将模具在2min内急速降温至30℃,并保温40min,固化得到聚氨酯发泡材料。
实施例5
本实施例提供了一种阻燃聚氨酯发泡材料生产方法,包括以下步骤:
步骤一:将80重量份聚酯多元醇、20重量份淀粉、5重量份聚磷酸铵、1重量份季戊四醇以及5重量份水加入到反应釜中,混合均匀,其中聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的混合物,且聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的质量比为3:1。
步骤二:将25重量份异氰酸酯加入到步骤一中所述反应釜,在氮气保护下加热80℃反应4小时,所述异氰酸酯为1,5-萘二异氰酸酯。
步骤三:将步骤二中所述反应釜降温至50℃,加入1.2重量份催化剂、以及7重量份扩链剂,保温5小时;
步骤四:将3重量份稳定剂加入到步骤三中反应釜,搅拌均匀后装入到喷射机一中,并加热至100℃备用;
步骤五:准备2重量份粉煤灰和5重量份陶瓷粉装入喷射机二中混匀,并加热至100℃备用;
步骤六:准备5重量份酚醛树脂、1重量份三聚氰胺溶于乙醇中,装入喷射机三中,并加热至100℃备用;
步骤七:准备成型模具,喷射机一和喷射机二设置在模具上方,且喷射机一和喷射机二间隔设置,喷射机三对称设于模具两侧,喷射机一、喷射机二和喷射机三均加热至120℃并朝向模具喷射,模具压力为3MPa,聚氨酯发泡材料厚度为30mm。
步骤八:将模具在2min内急速降温至30℃,并保温30min,固化得到聚氨酯发泡材料。
对比例1
按照实施例1中的步骤,提供一种聚氨酯发泡材料的生产方法,但在步骤六和七中不添加酚醛树脂和三聚氰胺。
对比例2
按照实施例1中的步骤,提供一种聚氨酯发泡材料的生产方法,但在步骤一中不添加聚磷酸铵和季戊四醇。
对比例3
按照实施例1中的步骤,提供一种聚氨酯发泡材料的生产方法,但在上述生产步骤中,聚磷酸铵、季戊四醇、酚醛树脂和三聚氰胺均不添加。
根据以上实施例和对比例,检测聚氨酯泡棉的物理性能,结果如表1所示。
从表1可以看出,通过本发明提供的方法制得的聚氨酯发泡材料的密度稳定于0.6g/cm3,密度较高,抗冲击强度高,说明聚氨酯发泡材料具有优越的减震缓冲性能。同时,通过对比例可知,聚磷酸铵、季戊四醇、酚醛树脂和三聚氰胺之间具有协同防护作用,具有良好的阻燃性能,促进了聚氨酯发泡材料的应用范围,同时采用本申请的方法生产的聚氨酯发泡材料为层级结构,实现多层防护效果,阻燃性能良好。
本发明将淀粉和聚酯多元醇进行预先混合,淀粉作为含有大量羟基的葡萄糖聚合物,与聚酯多元醇相容性高,预先混合使得其与异氰酸酯发生亲和加成反应时,反应更充分,利用聚酯多元醇和淀粉协同作用,可以提高聚氨酯的密度,并保证密度的均匀性,同时改善其回弹力;
本发明提供了利用混合聚酯多元醇和异氰酸酯反应,混合聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇,聚己二酸乙二醇丁二醇酯是一种混合二元醇聚酯,它的使用减小了聚氨酯的结晶性,增加聚氨酯的初黏强度,聚碳酸酯二醇具有良好的耐水解性和耐氧化性,二者混合使用时,可以提高聚氨酯泡棉的性能;
本发明中聚磷酸铵和季戊四醇的加入,能够显著改善聚氨酯发泡材料的阻燃性能,特别是在聚氨酯泡棉的机械强度较高时,使得聚氨酯发泡材料的阻燃性能提高;同时,还设置了酚醛树脂和三聚氰胺作为阻燃材料成分,其使用时喷射在聚氨酯发泡材料的上下两端面,形成了阻燃防护层效果,同时在聚氨酯发泡材料的中间也形成一层防护层,这样就使聚氨酯发泡材料结构更加稳定,同时增强阻燃防护效果。
本发明创造性的引入了粉煤灰和陶瓷粉,通过与淀粉、聚酯多元醇、聚磷酸铵和季戊四醇的同时喷射,直接混入到聚氨酯泡棉的生产结构中,粉煤灰能够吸收淀粉和聚酯多元醇反应混合物中的水分,与陶瓷粉配合,加速聚氨酯泡棉的固定过程,大大改善了聚氨酯泡棉的物理性能。
虽然,上文中已经用一般性说明及具体实施例对本发明作了详尽的描述,但在本发明基础上,可以对之作一些修改或改进,这对本领域技术人员而言是显而易见的。因此,在不偏离本发明精神的基础上所做的这些修改或改进,均属于本发明要求保护的范围。
Claims (4)
1.一种阻燃聚氨酯发泡材料生产方法,其特征在于,包括以下步骤:
步骤一:将60-80重量份聚酯多元醇、20-40重量份淀粉、1-5重量份聚磷酸铵、1-3重量份季戊四醇以及2-5重量份水加入到反应釜中,混合均匀,其中聚酯多元醇包括聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的混合物,且聚己二酸乙二醇丁二醇酯和聚碳酸酯二醇的质量比为3:1;
步骤二:将15-25重量份异氰酸酯加入到步骤一中所述反应釜,在氮气保护下加热80-90℃反应2-4小时,所述异氰酸酯为1,5-萘二异氰酸酯;
步骤三:将步骤二中所述反应釜降温至50-60℃,加入0.5-2重量份催化剂、以及4-8重量份扩链剂,保温3-5小时;
步骤四:将1-3重量份稳定剂加入到步骤三中反应釜,搅拌均匀后装入到喷射机一中,并加热至100℃备用;
步骤五:准备2-5重量份粉煤灰和2-5重量份陶瓷粉装入喷射机二中混匀,并加热至100℃备用;
步骤六:准备2-5重量份酚醛树脂、1-3重量份三聚氰胺溶于乙醇中,装入喷射机三中,并加热至100℃备用;
步骤七:准备成型模具,喷射机一和喷射机二设置在模具上方,且喷射机一和喷射机二间隔设置,喷射机三对称设于模具两侧,喷射机一、喷射机二和喷射机三均加热至120℃并朝向模具喷射,模具压力为0.5-3MPa,聚氨酯发泡材料厚度为20mm-30mm;
步骤八:将模具在2min内急速降温至30℃,并保温30-40min,固化得到聚氨酯发泡材料。
2.如权利要求1所述的阻燃聚氨酯发泡材料生产方法,其特征在于,所述步骤三中催化剂为辛酸亚锡或二丁基锡二月桂酸酯。
3.如权利要求1所述的阻燃聚氨酯发泡材料生产方法,其特征在于,所述步骤三中扩链剂包括1,4-丁二醇、乙二醇、一缩二乙二醇、乙二胺、二乙烯二胺、三乙烯四胺中的一种或多种的组合。
4.如权利要求1所述的阻燃聚氨酯发泡材料生产方法,其特征在于,所述步骤四中稳定剂为硅油。
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