CN113603958A - 一种橡塑绝缘发泡材料及其制备方法 - Google Patents
一种橡塑绝缘发泡材料及其制备方法 Download PDFInfo
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- 239000004033 plastic Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000006261 foam material Substances 0.000 title claims abstract description 10
- 238000005187 foaming Methods 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 57
- 239000002994 raw material Substances 0.000 claims abstract description 49
- 238000002156 mixing Methods 0.000 claims abstract description 35
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003063 flame retardant Substances 0.000 claims abstract description 25
- 239000004088 foaming agent Substances 0.000 claims abstract description 25
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 18
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 18
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 17
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 17
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 17
- 229920001194 natural rubber Polymers 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 16
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 16
- MSRJTTSHWYDFIU-UHFFFAOYSA-N octyltriethoxysilane Chemical compound CCCCCCCC[Si](OCC)(OCC)OCC MSRJTTSHWYDFIU-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229960003493 octyltriethoxysilane Drugs 0.000 claims abstract description 16
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 239000010703 silicon Substances 0.000 claims abstract description 16
- ALVYUZIFSCKIFP-UHFFFAOYSA-N triethoxy(2-methylpropyl)silane Chemical compound CCO[Si](CC(C)C)(OCC)OCC ALVYUZIFSCKIFP-UHFFFAOYSA-N 0.000 claims abstract description 16
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 claims abstract description 15
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 15
- 238000004073 vulcanization Methods 0.000 claims description 12
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- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 claims description 8
- DDMOUSALMHHKOS-UHFFFAOYSA-N 1,2-dichloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)(Cl)C(F)(F)Cl DDMOUSALMHHKOS-UHFFFAOYSA-N 0.000 claims description 8
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 8
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 8
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 8
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 229940087091 dichlorotetrafluoroethane Drugs 0.000 claims description 8
- VONWDASPFIQPDY-UHFFFAOYSA-N dimethyl methylphosphonate Chemical compound COP(C)(=O)OC VONWDASPFIQPDY-UHFFFAOYSA-N 0.000 claims description 8
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 8
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 8
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 8
- 235000011152 sodium sulphate Nutrition 0.000 claims description 8
- 238000010907 mechanical stirring Methods 0.000 claims description 2
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- 230000032683 aging Effects 0.000 abstract description 3
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- 238000001514 detection method Methods 0.000 description 1
- IQDGSYLLQPDQDV-UHFFFAOYSA-N dimethylazanium;chloride Chemical compound Cl.CNC IQDGSYLLQPDQDV-UHFFFAOYSA-N 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical group C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明提供一种橡塑绝缘发泡材料及其制备方法,涉及发泡材料加工技术领域。所述橡塑绝缘发泡材料由乙烯‑醋酸乙烯共聚物、天然橡胶、三元乙丙橡胶、低密度聚乙烯、液态MQ硅树脂、异丁基三乙氧基硅烷、辛基三乙氧基硅烷、氧化石墨烯、聚二烯丙基二甲基氯化铵、碳酸二甲酯、阻燃剂、发泡剂,通过原料复合、原料改性处理、原料混合、原料密炼、发泡成型等步骤制备而成。本发明克服了现有技术的不足,具有良好的绝缘、隔热效果的同时,能够有效抗老化龟裂,提升材料的使用寿命。
Description
技术领域
本发明涉及发泡材料加工技术领域,具体涉及一种橡塑绝缘发泡材料及其制备方法。
背景技术
传统的橡塑发泡材料具有低密度,密闭式气泡机构,耐屈挠,导热系数,水汽透过率,吸水率低等特点,富柔软性,施工方便,绿色环保的优点,广泛应用于保温隔热领域,且由于橡塑材料的优秀性质,通常应用于中央空调冷冻机房,建筑,船舶,车辆等行业的各类水汽管道的保温,隔热。还可加工制作成健身器材,医疗器械,日用品把套,扩套等。
橡塑发泡材料是高品质的保温节能材料,所以在安装及应用中不会产生任何对人体有害的污染物;且其具有优良的绝缘性能,并且其导热系数低、防火性能好;由于其为闭泡式结构,外界空气中的水很难渗透到材料之中,具有优异的抗水汽渗透能力。一般来说橡塑发泡材料在使用时随着温度的变化容易造成老化加速,长期使用容易造成龟裂现象,严重影响产品的使用效果,缩短使用寿命。
发明内容
针对现有技术不足,本发明提供一种橡塑绝缘发泡材料及其制备方法,在具有良好的绝缘、隔热效果的同时,能够有效抗老化龟裂,提升材料的使用寿命。
为实现以上目的,本发明的技术方案通过以下技术方案予以实现:
一种橡塑绝缘发泡材料,所述橡塑绝缘发泡材料由以下重量份的原料制成:乙烯-醋酸乙烯共聚物40-60份、天然橡胶10-18份、三元乙丙橡胶6-10份、低密度聚乙烯20-25份、液态MQ硅树脂4-6份、异丁基三乙氧基硅烷1-3份、辛基三乙氧基硅烷2-3份、氧化石墨烯1-2份、聚二烯丙基二甲基氯化铵1-4份、碳酸二甲酯1-3份、阻燃剂2-3份、发泡剂2-6份。
优选的,所述阻燃剂为聚磷酸铵、DMMP、十溴二苯乙烷质量比2∶2∶1的混合物。
优选的,所述发泡剂为二氯四氟乙烷、脂肪醇聚氧乙烯醚硫酸钠、碳酸钙质量比1∶3∶1的混合物。
所述橡塑绝缘发泡材料的制备方法包括以下步骤:
(1)原料复合:将液态MQ硅树脂加入异丁基三乙氧基硅烷和辛基三乙氧基硅烷中混合搅拌均匀,得复合料备用;
(2)原料改性处理:将乙烯-醋酸乙烯共聚物混合低密度聚乙烯、聚二烯丙基二甲基氯化铵后加入氧化石墨烯置于反应釜中升温至120-150℃后进行高速机械搅拌,得改性基料备用;
(3)原料混合:将发泡剂混合上述复合料,置于搅拌釜中搅拌均匀,后加入碳酸二甲酯,继续搅拌,得混合料备用;
(4)原料密炼:将上述改性基料加入天然橡胶、三元乙丙橡胶和阻燃剂在密炼机中采用多段式温度进行密炼,后加入上述混合料继续密炼15-20min后挤出造粒,得母粒备用;
(5)发泡成型:将上述母粒置于模具中升温后初次发泡,后送入平板硫化机进行硫化发泡处理,冷却得橡塑绝缘发泡材料。
优选的,所述步骤(1)中混合搅拌的温度为55-65℃,搅拌转速为400-600r/min,搅拌时间是为25-35min。
优选的,所述步骤(2)中高速机械搅拌的转速为1200-1600r/min,搅拌的时间为20-30min。
优选的,所述步骤(3)中反应釜中搅拌的转速为500-800r/min,且反应釜内的温度为45-55℃。
优选的,所述步骤(4)中多段式温度密炼的方式为在130-140℃温度下密炼40-50min,后调节温度至130-140℃温度,继续密炼20-30min,后调节温度至120-130℃密炼50-80min,再于130-150℃温度下密炼20-30min,加入混合料继续密炼的温度为120-130℃。
优选的,所述步骤(5)中初次发泡的温度为170-180℃,发泡时间为2-4min,硫化发泡处理的蒸汽压力0.7-0.75MPa,硫化时间为12-15min。
本发明提供一种橡塑绝缘发泡材料及其制备方法,与现有技术相比优点在于:
(1)本申请采用MQ硅树脂混合异丁基三乙氧基硅烷和辛基三乙氧基硅烷,有效提升后期原料的抗老化性能,同时提升原料混合的均匀性;
(2)本申请采用乙烯-醋酸乙烯共聚物、低密度聚乙烯、聚二烯丙基二甲基氯化铵混合氧化石墨烯改性处理,提升原料的力学性能,同时增强后续的绝热效果;
(3)本发明采用多段式温度密炼,同时二次发泡,有效提升原料的混合均匀性,提升原料的稳定性,同时保证原料隔音、隔热、防震、电绝缘、耐热、耐寒等效果。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面结合本发明实施例对本发明实施例中的技术方案进行清楚、完整地描述,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作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。
实施例1:
一种橡塑绝缘发泡材料,所述橡塑绝缘发泡材料由以下重量份的原料制成:乙烯-醋酸乙烯共聚物40份、天然橡胶10份、三元乙丙橡胶6份、低密度聚乙烯20份、液态MQ硅树脂4份、异丁基三乙氧基硅烷1份、辛基三乙氧基硅烷2份、氧化石墨烯1份、聚二烯丙基二甲基氯化铵1份、碳酸二甲酯1份、阻燃剂2份、发泡剂2份。
其中,所述阻燃剂为聚磷酸铵、DMMP、十溴二苯乙烷质量比2∶2∶1的混合物;所述发泡剂为二氯四氟乙烷、脂肪醇聚氧乙烯醚硫酸钠、碳酸钙质量比1∶3∶1的混合物。
所述橡塑绝缘发泡材料的制备方法包括以下步骤:
(1)原料复合:将液态MQ硅树脂加入异丁基三乙氧基硅烷和辛基三乙氧基硅烷中于55℃温度下,以400r/min的转速,混合搅拌25min,得复合料备用;
(2)原料改性处理:将乙烯-醋酸乙烯共聚物混合低密度聚乙烯、聚二烯丙基二甲基氯化铵后加入氧化石墨烯置于反应釜中升温至120℃后采用1200r/min的转速,高速机械搅拌20min,得改性基料备用;
(3)原料混合:将发泡剂混合上述复合料,置于搅拌釜中,在45℃温度下,以500r/min的转速搅拌均匀,后加入碳酸二甲酯,继续搅拌,得混合料备用;
(4)原料密炼:将上述改性基料加入天然橡胶、三元乙丙橡胶和阻燃剂在密炼机中在130℃温度下密炼40min,后调节温度至130℃温度,继续密炼20min,后调节温度至120℃密炼50min,再于130℃温度下密炼20min,后加入上述混合料以120℃的温度继续密炼15min后挤出造粒,得母粒备用;
(5)发泡成型:将上述母粒置于模具中升温至170℃后初次发泡2min,后送入平板硫化机进行以的蒸汽压力0.7MPa硫化发泡处理12min,冷却得橡塑绝缘发泡材料。
实施例2:
一种橡塑绝缘发泡材料,所述橡塑绝缘发泡材料由以下重量份的原料制成:乙烯-醋酸乙烯共聚物60份、天然橡胶18份、三元乙丙橡胶10份、低密度聚乙烯25份、液态MQ硅树脂6份、异丁基三乙氧基硅烷3份、辛基三乙氧基硅烷3份、氧化石墨烯2份、聚二烯丙基二甲基氯化铵4份、碳酸二甲酯3份、阻燃剂3份、发泡剂6份。
其中,所述阻燃剂为聚磷酸铵、DMMP、十溴二苯乙烷质量比2∶2∶1的混合物;所述发泡剂为二氯四氟乙烷、脂肪醇聚氧乙烯醚硫酸钠、碳酸钙质量比1∶3∶1的混合物。
所述橡塑绝缘发泡材料的制备方法包括以下步骤:
(1)原料复合:将液态MQ硅树脂加入异丁基三乙氧基硅烷和辛基三乙氧基硅烷中于65℃温度下,以600r/min的转速,混合搅拌35min,得复合料备用;
(2)原料改性处理:将乙烯-醋酸乙烯共聚物混合低密度聚乙烯、聚二烯丙基二甲基氯化铵后加入氧化石墨烯置于反应釜中升温至150℃后采用1600r/min的转速,高速机械搅拌30min,得改性基料备用;
(3)原料混合:将发泡剂混合上述复合料,置于搅拌釜中,在55℃温度下,以800r/min的转速搅拌均匀,后加入碳酸二甲酯,继续搅拌,得混合料备用;
(4)原料密炼:将上述改性基料加入天然橡胶、三元乙丙橡胶和阻燃剂在密炼机中在140℃温度下密炼50min,后调节温度至140℃温度,继续密炼30min,后调节温度至130℃密炼80min,再于150℃温度下密炼30min,后加入上述混合料以130℃的温度继续密炼20min后挤出造粒,得母粒备用;
(5)发泡成型:将上述母粒置于模具中升温至180℃后初次发泡4min,后送入平板硫化机进行以的蒸汽压力0.75MPa硫化发泡处理15min,冷却得橡塑绝缘发泡材料。
实施例3:
一种橡塑绝缘发泡材料,所述橡塑绝缘发泡材料由以下重量份的原料制成:乙烯-醋酸乙烯共聚物50份、天然橡胶14份、三元乙丙橡胶8份、低密度聚乙烯23份、液态MQ硅树脂5份、异丁基三乙氧基硅烷2份、辛基三乙氧基硅烷2.5份、氧化石墨烯1.5份、聚二烯丙基二甲基氯化铵2份、碳酸二甲酯2份、阻燃剂2.5份、发泡剂4份。
其中,所述阻燃剂为聚磷酸铵、DMMP、十溴二苯乙烷质量比2∶2∶1的混合物;所述发泡剂为二氯四氟乙烷、脂肪醇聚氧乙烯醚硫酸钠、碳酸钙质量比1∶3∶1的混合物。
所述橡塑绝缘发泡材料的制备方法包括以下步骤:
(1)原料复合:将液态MQ硅树脂加入异丁基三乙氧基硅烷和辛基三乙氧基硅烷中于60℃温度下,以500r/min的转速,混合搅拌30min,得复合料备用;
(2)原料改性处理:将乙烯-醋酸乙烯共聚物混合低密度聚乙烯、聚二烯丙基二甲基氯化铵后加入氧化石墨烯置于反应釜中升温至140℃后采用1400r/min的转速,高速机械搅拌25min,得改性基料备用;
(3)原料混合:将发泡剂混合上述复合料,置于搅拌釜中,在50℃温度下,以650r/min的转速搅拌均匀,后加入碳酸二甲酯,继续搅拌,得混合料备用;
(4)原料密炼:将上述改性基料加入天然橡胶、三元乙丙橡胶和阻燃剂在密炼机中在135℃温度下密炼45min,后调节温度至135℃温度,继续密炼25min,后调节温度至125℃密炼65min,再于140℃温度下密炼25min,后加入上述混合料以125℃的温度继续密炼18min后挤出造粒,得母粒备用;
(5)发泡成型:将上述母粒置于模具中升温至175℃后初次发泡3min,后送入平板硫化机进行以的蒸汽压力0.75MPa硫化发泡处理13min,冷却得橡塑绝缘发泡材料。
对比例1:
一种橡塑绝缘发泡材料,所述橡塑绝缘发泡材料由以下重量份的原料制成:天然橡胶60份、三元乙丙橡胶8份、低密度聚乙烯23份、液态MQ硅树脂5份、异丁基三乙氧基硅烷2份、辛基三乙氧基硅烷2.5份、聚二烯丙基二甲基氯化铵2份、碳酸二甲酯2份、阻燃剂2.5份、发泡剂4份。
其中,所述阻燃剂为聚磷酸铵、DMMP、十溴二苯乙烷质量比2∶2∶1的混合物;所述发泡剂为二氯四氟乙烷、脂肪醇聚氧乙烯醚硫酸钠、碳酸钙质量比1∶3∶1的混合物。
所述橡塑绝缘发泡材料的制备方法包括以下步骤:
(1)原料复合:将液态MQ硅树脂加入异丁基三乙氧基硅烷和辛基三乙氧基硅烷中于60℃温度下,以500r/min的转速,混合搅拌30min,得复合料备用;
(2)原料改性处理:将低密度聚乙烯、聚二烯丙基二甲基氯化铵后置于反应釜中升温至140℃后采用1400r/min的转速,高速机械搅拌25min,得基料备用;
(3)原料混合:将发泡剂混合上述复合料,置于搅拌釜中,在50℃温度下,以650r/min的转速搅拌均匀,后加入碳酸二甲酯,继续搅拌,得混合料备用;
(4)原料密炼:将上述基料加入天然橡胶、三元乙丙橡胶和阻燃剂在密炼机中在135℃温度下密炼45min,后调节温度至135℃温度,继续密炼25min,后调节温度至125℃密炼65min,再于140℃温度下密炼25min,后加入上述混合料以125℃的温度继续密炼18min后挤出造粒,得母粒备用;
(5)发泡成型:将上述母粒置于模具中升温至175℃后初次发泡3min,后送入平板硫化机进行以的蒸汽压力0.75MPa硫化发泡处理13min,冷却得橡塑绝缘发泡材料。
对比例2:
一种橡塑绝缘发泡材料,所述橡塑绝缘发泡材料由以下重量份的原料制成:乙烯-醋酸乙烯共聚物50份、天然橡胶14份、三元乙丙橡胶8份、低密度聚乙烯23份、氧化石墨烯1.5份、聚二烯丙基二甲基氯化铵2份、碳酸二甲酯2份、阻燃剂2.5份、发泡剂4份。
其中,所述阻燃剂为聚磷酸铵、DMMP、十溴二苯乙烷质量比2∶2∶1的混合物;所述发泡剂为二氯四氟乙烷、脂肪醇聚氧乙烯醚硫酸钠、碳酸钙质量比1∶3∶1的混合物。
所述橡塑绝缘发泡材料的制备方法包括以下步骤:
(1)原料改性处理:将乙烯-醋酸乙烯共聚物混合低密度聚乙烯、聚二烯丙基二甲基氯化铵后加入氧化石墨烯置于反应釜中升温至140℃后采用1400r/min的转速,高速机械搅拌25min,得改性基料备用;
(2)原料混合:将发泡剂混合上述复合料,置于搅拌釜中,在50℃温度下,以650r/min的转速搅拌均匀,后加入碳酸二甲酯,继续搅拌,得混合料备用;
(3)原料密炼:将上述改性基料加入天然橡胶、三元乙丙橡胶和阻燃剂在密炼机中在135℃温度下密炼45min,后调节温度至135℃温度,继续密炼25min,后调节温度至125℃密炼65min,再于140℃温度下密炼25min,后加入上述混合料以125℃的温度继续密炼18min后挤出造粒,得母粒备用;
(4)发泡成型:将上述母粒置于模具中升温至175℃后初次发泡3min,后送入平板硫化机进行以的蒸汽压力0.75MPa硫化发泡处理13min,冷却得橡塑绝缘发泡材料。
对比例3:
一种橡塑绝缘发泡材料,所述橡塑绝缘发泡材料由以下重量份的原料制成:乙烯-醋酸乙烯共聚物50份、天然橡胶14份、三元乙丙橡胶8份、低密度聚乙烯23份、液态MQ硅树脂5份、异丁基三乙氧基硅烷2份、辛基三乙氧基硅烷2.5份、氧化石墨烯1.5份、阻燃剂2.5份、发泡剂4份。
其中,所述阻燃剂为聚磷酸铵、DMMP、十溴二苯乙烷质量比2∶2∶1的混合物;所述发泡剂为二氯四氟乙烷、脂肪醇聚氧乙烯醚硫酸钠、碳酸钙质量比1∶3∶1的混合物。
所述橡塑绝缘发泡材料的制备方法包括以下步骤:
(1)原料复合:将液态MQ硅树脂加入异丁基三乙氧基硅烷和辛基三乙氧基硅烷中于60℃温度下,以500r/min的转速,混合搅拌30min,得复合料备用;
(2)原料改性处理:将乙烯-醋酸乙烯共聚物混合低密度聚乙烯后加入氧化石墨烯置于反应釜中升温至140℃后采用1400r/min的转速,高速机械搅拌25min,得改性基料备用;
(3)原料混合:将发泡剂混合上述复合料,置于搅拌釜中,在50℃温度下,以650r/min的转速搅拌均匀,得混合料备用;
(4)原料密炼:将上述改性基料加入天然橡胶、三元乙丙橡胶和阻燃剂在密炼机中在135℃温度下密炼45min,后调节温度至135℃温度,继续密炼25min,后调节温度至125℃密炼65min,再于140℃温度下密炼25min,后加入上述混合料以125℃的温度继续密炼18min后挤出造粒,得母粒备用;
(5)发泡成型:将上述母粒置于模具中升温至175℃后初次发泡3min,后送入平板硫化机进行以的蒸汽压力0.75MPa硫化发泡处理13min,冷却得橡塑绝缘发泡材料。
检测:
选取上述实施例1-3和对比例1-3所得发泡材料进行性能检测具体结果如下表所示:
由上表可知,本申请所制备的发泡材料具有良好的绝热和耐老化效果。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。
Claims (9)
1.一种橡塑绝缘发泡材料,其特征在于,所述橡塑绝缘发泡材料由以下重量份的原料制成:乙烯-醋酸乙烯共聚物40-60份、天然橡胶10-18份、三元乙丙橡胶6-10份、低密度聚乙烯20-25份、液态MQ硅树脂4-6份、异丁基三乙氧基硅烷1-3份、辛基三乙氧基硅烷2-3份、氧化石墨烯1-2份、聚二烯丙基二甲基氯化铵1-4份、碳酸二甲酯1-3份、阻燃剂2-3份、发泡剂2-6份。
2.根据权利要求1所述的一种橡塑绝缘发泡材料,其特征在于:所述阻燃剂为聚磷酸铵、DMMP、十溴二苯乙烷质量比2∶2∶1的混合物。
3.根据权利要求1所述的一种橡塑绝缘发泡材料,其特征在于:所述发泡剂为二氯四氟乙烷、脂肪醇聚氧乙烯醚硫酸钠、碳酸钙质量比1∶3∶1的混合物。
4.一种橡塑绝缘发泡材料的制备方法,其特征在于:所述橡塑绝缘发泡材料的制备方法包括以下步骤:
(1)原料复合:将液态MQ硅树脂加入异丁基三乙氧基硅烷和辛基三乙氧基硅烷中混合搅拌均匀,得复合料备用;
(2)原料改性处理:将乙烯-醋酸乙烯共聚物混合低密度聚乙烯、聚二烯丙基二甲基氯化铵后加入氧化石墨烯置于反应釜中升温至120-150℃后进行高速机械搅拌,得改性基料备用;
(3)原料混合:将发泡剂混合上述复合料,置于搅拌釜中搅拌均匀,后加入碳酸二甲酯,继续搅拌,得混合料备用;
(4)原料密炼:将上述改性基料加入天然橡胶、三元乙丙橡胶和阻燃剂在密炼机中采用多段式温度进行密炼,后加入上述混合料继续密炼15-20min后挤出造粒,得母粒备用;
(5)发泡成型:将上述母粒置于模具中升温后初次发泡,后送入平板硫化机进行硫化发泡处理,冷却得橡塑绝缘发泡材料。
5.根据权利要求4所述的一种橡塑绝缘发泡材料的制备方法,其特征在于:所述步骤(1)中混合搅拌的温度为55-65℃,搅拌转速为400-600r/min,搅拌时间是为25-35min。
6.根据权利要求4所述的一种橡塑绝缘发泡材料的制备方法,其特征在于:所述步骤(2)中高速机械搅拌的转速为1200-1600r/min,搅拌的时间为20-30min。
7.根据权利要求4所述的一种橡塑绝缘发泡材料的制备方法,其特征在于:所述步骤(3)中反应釜中搅拌的转速为500-800r/min,且反应釜内的温度为45-55℃。
8.根据权利要求4所述的一种橡塑绝缘发泡材料的制备方法,其特征在于:所述步骤(4)中多段式温度密炼的方式为在130-140℃温度下密炼40-50min,后调节温度至130-140℃温度,继续密炼20-30min,后调节温度至120-130℃密炼50-80min,再于130-150℃温度下密炼20-30min,加入混合料继续密炼的温度为120-130℃。
9.根据权利要求4所述的一种橡塑绝缘发泡材料的制备方法,其特征在于:所述步骤(5)中初次发泡的温度为170-180℃,发泡时间为2-4min,硫化发泡处理的蒸汽压力0.7-0.75MPa,硫化时间为12-15min。
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