CN117467104B - 一种匀质的a级硬质聚氨酯保温板及其制备工艺 - Google Patents
一种匀质的a级硬质聚氨酯保温板及其制备工艺 Download PDFInfo
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- CN117467104B CN117467104B CN202311680915.7A CN202311680915A CN117467104B CN 117467104 B CN117467104 B CN 117467104B CN 202311680915 A CN202311680915 A CN 202311680915A CN 117467104 B CN117467104 B CN 117467104B
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- polyurethane
- flame retardant
- insulation board
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Abstract
本发明公开了一种匀质的A级硬质聚氨酯保温板及其制备工艺,属于保温材料技术领域。所述的聚氨酯保温板的芯材是通过固液混合装置及聚氨酯保温板发泡生产线将聚氨酯、无机材料、可膨胀石墨、有机阻燃剂混合反应后制得,聚氨酯占总质量的21~34%,无机材料占总质量的40~55%,可膨胀石墨占1~20%,所述有机阻燃剂占15~30%,其中有机阻燃剂包括低分解温度阻燃剂和高分解温度阻燃剂。本发明制备的保温板能够工业化生产,其芯密度≤120Kg/m3,压缩强度≥150KPa,导热系数≤0.024w/(m.k),高温和低温尺寸稳定性≤1%,吸水率≤3%,同时降低了聚氨酯的燃烧放热量,解决了聚氨酯750℃下有持续燃烧火焰的问题,能够满足A级保温领域市场需求。
Description
技术领域
本发明属于保温材料领域,具体涉及一种匀质的A级硬质聚氨酯保温板及其制备工艺。
背景技术
建筑墙体的隔热保温材料中,聚氨酯保温材料具有不可替代的作用。聚氨酯作为一种可燃的高分子材料,行业内为了提升聚氨酯作为板材的阻燃性,一般以聚氨酯硬泡为芯材,A级无机板为面层制成非匀质的复合板这两种方式来提高泡沫的阻燃性能。然而受限于聚氨酯材料燃点低的因素,目前市售的聚氨酯隔热保温材料仅能达到B1级难燃。因此如何解决有机保温材料的防火问题,成为行业难题。
中国专利CN108774306A和CN113585504A虽然能达到A2级防火要求,但其制品在750℃加热炉中均会发生剧烈燃烧,在实际应用中仍存在极大火灾风险;同时上述两个专利中均由于需要添加大量的无机材料,导致其密度高,保温性能不足,无法迎合市场需求;并且专利CN108774306A对无机材料的粒径有严格要求,专利CN113585504A需要使用硅烷偶联剂对无机材料进行表面改性,生产工艺复杂,难以工业生产化。
发明内容
本发明旨在解决上述现有技术中硬质聚氨酯板750℃轰燃、750℃有持续燃烧火焰以及A级聚氨酯板难以迎合市场需求、难以工业化生产的问题。本发明提出一种匀质的A级硬质聚氨酯保温板及其制备工艺。
本发明解决其技术问题所采用的技术方案是:一种匀质的A级硬质聚氨酯保温板,包括由聚氨酯、无机材料、可膨胀石墨和有机阻燃剂反应后制得的聚氨酯保温板,按总重量百分比计,所述可膨胀石墨占1~20%,所述有机阻燃剂占15~30%,其中有机阻燃剂包括低分解温度阻燃剂和高分解温度阻燃剂,低分解温度阻燃剂与高分解温度阻燃剂的重量比为1:4~4:1。
研究中发现,若板材中不添加可膨胀石墨,板材受热表面的炭层不能完全覆盖,内部聚氨酯呈连续相,形成迅速引燃的火焰通道;添加1%质量的可膨胀石墨时,可膨胀石墨的体积大约占总体积的0.3%,在750℃温度下表层的可膨胀石墨膨胀350倍以上,形成的石墨炭层刚好覆盖整个外表面,从而避免热量累积,阻止火焰生成;但可膨胀石墨添加量超过20%时,会导致发泡料失去流动性,从而破坏泡孔结构,导致板材的导热系数增加,保温效果变差。
按总重量百分比计,所述无机材料占40~55%。本方案中无机材料的作用主要为控制板材的质量损失率和抗压强度,当无机材料的添加量小于40%时,质量损失率大于50%不能满足标准要求,当无机材料的添加量大于55%时,板材密度太大,压缩强度变差,从而导致板材的脆性增加。
按总重量百分比计,所述聚氨酯占21~34%,所述聚氨酯由白料和黑料组成,所述白料与所述黑料的重量比为1:(1.1~2)。
所述白料包括以下重量份的原料,苯酐聚酯30~60份、蔗糖聚醚或山梨醇聚醚10~20份、胺醚2~10份、硅油2~8份、催化剂1~3份和发泡剂4~34份;所述黑料为聚合MDI。
所述催化剂为叔胺类、金属烷基化合物类中的一种或多种;所述发泡剂为HCFC~141b、戊烷类(环戊烷、正戊烷等)、水、HFC~245fa、LBA中的一种或多种。
所述无机材料为河砂、机制砂、玄武岩粉、金刚砂、水洗海砂、粉煤灰漂珠、膨胀珍珠岩、碳化硅中的一种或多种。
所述低分解温度阻燃剂为三聚氰胺氰尿酸盐、三聚氰胺中的一种或多种;所述高分解温度阻燃剂为有机次膦酸盐、三聚氰胺聚磷酸盐、三聚氰胺磷酸盐中的一种或多种。
本方案中的低分解温度阻燃剂在150~450℃时的分解量>90%,高分解温度阻燃剂在400℃时的分解量<50%或在700℃时的分解残量>10%,若低分解温度阻燃剂的含量过高,高分解温度阻燃剂的含量过低,高分解温度阻燃剂无法与可膨胀石墨在450-750℃进行有效的协同,导致该温度条件下可膨胀石墨的膨胀炭层中的低分解温度阻燃剂分解而高分解温度阻燃剂与之结合程度低,炭层容易脱落,引起燃烧火焰,同时低分解温度阻燃剂中的氨基会和聚氨酯中多余的黑料反应,形成过量的脆性链段,恶化板材的压缩强度;若低分解温度阻燃剂的含量过低,会导致聚氨酯在450℃内分解速度过快,炉内升温超过50℃,不能满足标准要求。
按总重量百分比计,所述可膨胀石墨占2~16%。
所述低分解温度阻燃剂和高分解温度阻燃剂的重量比是2:3~3:2。
上述A级硬质聚氨酯保温板的制备工艺,包括以下步骤:S1、将无机材料、可膨胀石墨和有机阻燃剂按一定比例在0~50℃经立式提料混合机混合均匀,得到固体组分;S2、将聚酯、聚醚、硅油、催化剂、发泡剂按一定比例混合均匀,得到聚氨酯白料,将聚氨酯白料和黑料按一定比例在0~50℃经过发泡机混合机头混合均匀,得到液体组分;S3、将S1中的固体组分与S2中的液体组分按一定比例经过带有静叶销的固液混合装置混合后在15~65℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
与现有技术相比,本发明的优点在于:
1、本发明利用可膨胀石墨、低分解温度阻燃剂及高分解温度阻燃剂的协同阻燃作用,使聚氨酯的着火点提高到750℃以上。具体原理如下:低分解温度阻燃剂在150~450℃时的分解量>90%,高分解温度阻燃剂在400℃时的分解量<50%或在700℃时的分解残量>10%,不同的分解温度使低分解温度阻燃剂和高分解温度阻燃剂对聚氨酯进行分段渐进保护;可膨胀石墨在整个燃烧过程中持续生成膨胀蠕虫状炭层覆盖其基体表面,炭层减少热量集垒,降低热导率,可降低后续低分解温度阻燃剂和高分解温度阻燃剂的分解速率;另一方面可膨胀石墨在受热过程中依次与低分解温度阻燃剂和高分解温度阻燃剂形成嵌合炭层,低分解温度阻燃剂和高分解温度阻燃剂的分解产物也会被吸附在可膨胀石墨的炭层周围,形成外部是隔氧隔热的连续炭层,连续炭层形成包裹在聚氨酯外部的蜂窝状结构,该结构具有优异的防火性能,可以抑制火焰生成;而高分解温度阻燃剂中的含磷物质受热分解产生磷酸、偏磷酸等酸性物质可进一步促进可膨胀石墨炭层内酸根粘结,减少炭层孔洞,使炭层更加致密,进一步隔绝火源,有机阻燃剂分解产生的水会降低聚氨酯的表层温度,而可膨胀石墨的膨胀是吸热过程,两者同时使用会显著降低聚氨酯的总放热量;低分解温度阻燃剂中的三聚氰胺氰尿酸盐和高分解温度阻燃剂中的三聚氰胺聚磷酸盐、三聚氰胺磷酸盐分解产物均为三聚氰胺,当上述阻燃剂共同使用时,随着燃烧时分解产物三聚氰胺的增多,特别是轰燃条件下,作为高分解温度阻燃剂的三聚氰胺聚磷酸盐/三聚氰胺磷酸盐的分解反应为可逆反应,其分解反应方向会受到抑制,从而使高分解温度阻燃剂的阻燃效果在低分解温度阻燃剂的协同下得到提升。
2、本发明制备的聚氨酯保温板降低了无机材料的添加量,无机材料仅占总重量的40~55%,无机材料在本发明中由原来的阻燃作用变换为仅起到配重的作用,降低整个保温板的密度,从而使生产相同体积的板材所消耗的原料更少,大幅度降低生产成本,同时保证聚氨酯组分具有相对较高的含量,保留了聚氨酯本身优异的保温隔水性能。
3、本发明中单独对黑料和白料经过高压机混合,促使大部分黑料先与白料反应,避免黑料提前与固体组分中的氨基反应,可以减少粉化,提高聚氨酯的强度和韧性;并且所有的固体组分单独作为一个组份,无需重复搅拌混合,对无机组分无粒径相关的严苛要求,也无需对其进行表面改性,通过立式提料机将不同密度的固体组分均匀混合,生产工艺更加简单,有效实现工业生产化。
具体实施方式
为使本技术领域人员更好理解本发明中的技术方案,下面通过实施例对本发明技术方案进行详细说明,但本发明的保护范围不局限于所述实施例。
实施例1
S1、固体组分混合:按重量份数计,取2.78份可膨胀石墨(BL~350,威海云山科技有限公司)、6.11份有机次膦酸盐、14.44份三聚氰胺氰尿酸盐、10份三聚氰胺、66.67份河砂,在0℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,取40份苯酐聚酯(PS3152,斯泰潘南京化学有限公司)、15份山梨醇聚醚(NJ6305C,句容宁武新材料股份有限公司)、3份胺醚(NJ403,句容宁武新材料股份有限公司)、5份硅油(AK8806,江苏美思德化学股份有限公司)、3份催化剂(叔胺类,空气化工)、34份发泡剂(141b,浙江三美化工股份有限公司)混合形成白料;
按照重量比为100:169的比例取上述100份白料和169份聚合MDI(B1001,巴耶夫)经发泡机混合机头30℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取28份S2中的液体组分和72份S1中的固体组分经过带有静叶销的固液混合装置混合后在60℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例2
S1、固体组分混合:按重量份数计,取5.63份可膨胀石墨(BL~450,威海云山科技有限公司)、16.9份三聚氰胺磷酸盐、18.31份三聚氰胺、59.16份玄武岩粉组成,在25℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,取55.4份苯酐聚酯(PS1752,斯泰潘南京化学有限公司)、20份蔗糖聚醚(ZS4110,南京钟山化工有限公司)、10份胺醚(GR403,上海高桥石油化工股份有限公司)、8份硅油(复合硅油,空气化工)、2.6份催化剂(金属烷基化合物类,空气化工)、4份发泡剂(水)混合形成白料;
按照重量比为100:140的比例取上述100份白料和140份聚合MDI(B1001,巴耶夫)经发泡机混合机头50℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取29份S2中的液体组分和71份S1中的固体组分经过带有静叶销的固液混合装置混合后在15℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例3
S1、固体组分混合:按重量份数计,取22.07份可膨胀石墨(BL~350,威海云山科技有限公司)、7份有机次磷酸盐、8.45份三聚氰胺聚磷酸盐、5.24份三聚氰胺、57.24份河砂组成,在14℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,取35份苯酐聚酯(PS2412,斯泰潘南京化学有限公司)、20份山梨醇聚醚(NJ6305C,句容宁武新材料股份有限公司)、5份胺醚(NJ403,句容宁武新材料股份有限公司)、6份硅油(S1908,江苏美思德化学股份有限公司)、2份催化剂(叔胺类和金属烷基化合物类的混合物)、32份发泡剂(R245fa,淄博澳帆化工有限公司)混合形成白料;
按照重量比为100:181的比例取上述100份白料和181份聚合MDI(B1001,巴耶夫)经发泡机混合机头0℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取27.5份S2中的液体组分和72.5份S1中的固体组分经过带有静叶销的固液混合装置混合后在35℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例4
S1、固体组分混合:按重量份数计,取25.32份可膨胀石墨(BL~450,威海云山科技有限公司)、10份有机次磷酸盐、8.23份三聚氰胺磷酸盐、4.55份三聚氰胺氰尿酸盐、51.9份机制砂组成,在50℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,取60份苯酐聚酯(PS2009,斯泰潘南京化学有限公司)、10份蔗糖聚醚(ZS835,南京钟山化工有限公司)、5份胺醚(YD401P,河北亚东化工集团有限公司)、5.3份硅油(L6900,迈图高新材料集团)、2.4份催化剂(叔胺类和金属烷基化合物类的混合物)、16.3份发泡剂(环戊烷)、1份水混合形成白料;
按照重量比为100:110的比例取上述100份白料和110份聚合MDI(B1001,巴耶夫)经发泡机混合机头25℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取21份S2中的液体组分和79份S1中的固体组分经过带有静叶销的固液混合装置混合后在65℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例5
S1、固体组分混合:按重量份数计,取17.33份可膨胀石墨(BL~450,威海云山科技有限公司)、13.33份有机次磷酸盐、8份三聚氰胺氰尿酸盐、61.34份膨胀珍珠岩组成,在42℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,取30份苯酐聚酯(PS2009,斯泰潘南京化学有限公司)、15份山梨醇聚醚(NJ6305C,句容宁武新材料股份有限公司)、10份胺醚(NJ403,句容宁武新材料股份有限公司)、8份硅油(S6900,迈图)、3份催化剂(叔胺类和金属烷基化合物类的混合物)、34份发泡剂(141b,浙江三美化工股份有限公司)混合形成白料;
按照重量比为100:160的比例取上述100份白料和160份聚合MDI(B1001,巴耶夫)经发泡机混合机头27℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取25份S2中的液体组分和75份S1中的固体组分经过带有静叶销的固液混合装置混合后在47℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例6
S1、固体组分混合:按重量份数计,取15.15份可膨胀石墨(BL~450,威海云山科技有限公司)、14.55份三聚氰胺磷酸盐、9.7份三聚氰胺、60.6份机制砂组成,在18℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,取46份苯酐聚酯(PS2009,斯泰潘南京化学有限公司)、10份山梨醇聚醚(NJ6305C,句容宁武新材料股份有限公司)、2份胺醚(NJ403,句容宁武新材料股份有限公司)、8份硅油(S6900,迈图)、3份催化剂(叔胺类和金属烷基化合物类的混合物)、30份发泡剂(LBA,霍尼韦尔)、1份水混合形成白料;
按照重量比为100:150的比例取上述100份白料和150份聚合MDI(B1001,巴耶夫)经发泡机混合机头5℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取34份S2中的液体组分和66份S1中的固体组分经过带有静叶销的固液混合装置混合后在20℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例7
S1、固体组分混合:按重量份数计,取1.27份可膨胀石墨(BL~450,威海云山科技有限公司)、9.11份三聚氰胺聚磷酸盐、10份三聚氰胺、10份三聚氰胺氰尿酸盐、69.62份金刚砂组成,在32℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,取50份苯酐聚酯(PS2009,斯泰潘南京化学有限公司)、12份蔗糖聚醚(ZS835,南京钟山化工有限公司)、8份胺醚(YD401P,河北亚东化工集团有限公司)、2份硅油(L6900,迈图高新材料集团)、3份催化剂(叔胺类和金属烷基化合物类的混合物)、25份发泡剂(20份环戊烷和5份141b)混合形成白料;
按照重量比为100:131的比例取上述100份白料和131份聚合MDI(B1001,巴耶夫)经发泡机混合机头22℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取21份S2中的液体组分和79份S1中的固体组分经过带有静叶销的固液混合装置混合后在54℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例8
S1、固体组分混合:按重量份数计,取11.86份可膨胀石墨(BL~450,威海云山科技有限公司)、16.43份三聚氰胺磷酸盐、13.57份三聚氰胺氰尿酸盐、58.14份水洗海沙组成,在36℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,取53份苯酐聚酯(PS1752,斯泰潘南京化学有限公司)、18份蔗糖聚醚(ZS4110,南京钟山化工有限公司)、10份胺醚(GR403,上海高桥石油化工股份有限公司)、8份硅油(复合硅油,空气化工)、1份催化剂(有机锡)、4份发泡剂(水)、6份发泡剂(141b,浙江三美化工股份有限公司)混合形成白料;
按照重量比为100:200的比例取上述100份白料和200份聚合MDI(B1001,巴耶夫)经发泡机混合机头15℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取30份S2中的液体组分和70份S1中的固体组分经过带有静叶销的固液混合装置混合后在55℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例9
S1、固体组分混合:按重量份数计,取6.61份可膨胀石墨(BL~450,威海云山科技有限公司)、12.05份三聚氰胺聚磷酸盐、12份三聚氰胺氰尿酸盐、69.34份粉煤灰漂珠组成,在42℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,取55.4份苯酐聚酯(PS1752,斯泰潘南京化学有限公司)、20份蔗糖聚醚(ZS4110,南京钟山化工有限公司)、10份胺醚(GR403,上海高桥石油化工股份有限公司)、8份硅油(复合硅油,空气化工)、2.6份催化剂(金属烷基化合物类,空气化工)、4份发泡剂(水)混合形成白料;
按照重量比为100:119的比例取上述100份白料和119份聚合MDI(B1001,巴耶夫)经发泡机混合机头42℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取25份S2中的液体组分和75份S1中的固体组分经过带有静叶销的固液混合装置混合后在26℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例10
S1、固体组分混合:按重量份数计,取4.03份可膨胀石墨(BL~450,威海云山科技有限公司)、16.11份三聚氰胺聚磷酸盐、24.16份三聚氰胺、55.7份机制砂组成,在5℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,60份苯酐聚酯(PS2009,斯泰潘南京化学有限公司)、10份蔗糖聚醚(ZS835,南京钟山化工有限公司)、5份胺醚(YD401P,河北亚东化工集团有限公司)、5.3份硅油(L6900,迈图高新材料集团)、2.4份催化剂(叔胺类和金属烷基化合物类的混合物)、16.3份发泡剂(正戊烷)、1份水混合形成白料;
按照重量比为100:190的比例取上述100份白料和190份聚合MDI(B1001,巴耶夫)经发泡机混合机头33℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取25.5份S2中的液体组分和74.5份S1中的固体组分经过带有静叶销的固液混合装置混合后在48℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
实施例11
S1、固体组分混合:按重量份数计,取4.14份可膨胀石墨(BL~350,威海云山科技有限公司)、9.24份有机次膦酸盐、26.62份三聚氰胺、60份河砂组成,在9℃经立式提料混合机混合均匀;
S2、液体组分混合:按重量份数计,44份苯酐聚酯(PS2412,斯泰潘南京化学有限公司)、20份山梨醇聚醚(NJ6305C,句容宁武新材料股份有限公司)、5份胺醚(NJ403,句容宁武新材料股份有限公司)、6份硅油(S1908,江苏美思德化学股份有限公司)、2份催化剂(叔胺类和金属烷基化合物类的混合物)、22份发泡剂(R245fa,淄博澳帆化工有限公司)、1份水混合形成白料;
按照重量比为100:139的比例取上述100份白料和139份聚合MDI(B1001,巴耶夫)经发泡机混合机头10℃混匀后,得到液体组分;
S3、制备板材:按重量份数计,取27.5份S2中的液体组分和72.5份S1中的固体组分经过带有静叶销的固液混合装置混合后在40℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
对实施例1~11制得的匀质的A级硬质聚氨酯保温板进行性能测试,结果见表1:
本发明制备的聚氨酯保温板在750℃加热炉内的持续燃烧时间tf=0s(GB/T 5464),炉内升温∆T≤50℃(GB/T 5464),质量损失率∆m≤50%(GB/T 5464),燃烧增长速率指数≤100W/s(GB/T 20284),600s的总放热量≤6MJ(GB/T 20284),达到不燃A级防火标准;本发明制备的聚氨酯保温板的芯密度≤120Kg/m3,压缩强度≥150KPa,导热系数≤0.024w/(m.k),高温和低温尺寸稳定性≤1%,吸水率≤3%,综合性能优异,能够满足A级保温领域市场需求。
Claims (3)
1.一种匀质的A级硬质聚氨酯保温板,包括由聚氨酯、无机材料、可膨胀石墨和有机阻燃剂反应后制得的聚氨酯保温板,其特征在于,按总重量百分比计,所述聚氨酯占21~34%,所述无机材料占40~55%,所述可膨胀石墨占2~16%,所述有机阻燃剂占15~30%,其中,所述聚氨酯由白料和黑料组成,所述白料与所述黑料的重量比为1:(1.1~2);所述无机材料为河砂、机制砂、玄武岩粉、金刚砂、水洗海砂、粉煤灰漂珠、膨胀珍珠岩、碳化硅中的一种或多种;所述有机阻燃剂由低分解温度阻燃剂和高分解温度阻燃剂组成,低分解温度阻燃剂与高分解温度阻燃剂的重量比为2:3~3:2;所述低分解温度阻燃剂为三聚氰胺氰尿酸盐、三聚氰胺中的一种或多种;高分解温度阻燃剂为有机次膦酸盐、三聚氰胺聚磷酸盐、三聚氰胺磷酸盐中的一种或多种。
2.根据权利要求1所述的一种匀质的A级硬质聚氨酯保温板,其特征在于,所述白料包括以下重量份的原料,苯酐聚酯30~60份、蔗糖聚醚或山梨醇聚醚10~20份、胺醚2~10份、硅油2~8份、催化剂1~3份和发泡剂4~34份;所述黑料为聚合MDI。
3.根据权利要求1~2任意一项所述的一种匀质的A级硬质聚氨酯保温板的制备工艺,其特征在于,包括以下步骤:S1、将无机材料、可膨胀石墨和有机阻燃剂按比例在0~50℃经立式提料混合机混合均匀,得到固体组分;S2、将聚酯、聚醚、硅油、催化剂、发泡剂按比例混合均匀,得到聚氨酯白料,将聚氨酯白料和黑料按比例在0~50℃经过发泡机混合机头混合均匀,得到液体组分;S3、将S1中的固体组分与S2中的液体组分按比例经过带有静叶销的固液混合装置混合后在15~65℃链板线上布料发板,制备成一种匀质的A级硬质聚氨酯保温板。
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