CN108892975A - 一种耐候型重质碳酸钙的制备方法 - Google Patents
一种耐候型重质碳酸钙的制备方法 Download PDFInfo
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 160
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 39
- -1 polyoxypropylene Polymers 0.000 claims abstract description 32
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 21
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 14
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 14
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 13
- 239000011734 sodium Substances 0.000 claims abstract description 13
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 235000019738 Limestone Nutrition 0.000 claims abstract description 11
- 239000006028 limestone Substances 0.000 claims abstract description 11
- HIDBROSJWZYGSZ-UHFFFAOYSA-N 1-phenylpyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC=C1 HIDBROSJWZYGSZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 9
- 241000276489 Merlangius merlangus Species 0.000 claims description 35
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- 229940100242 glycol stearate Drugs 0.000 claims description 13
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 claims description 13
- HSRJKNPTNIJEKV-UHFFFAOYSA-N Guaifenesin Chemical compound COC1=CC=CC=C1OCC(O)CO HSRJKNPTNIJEKV-UHFFFAOYSA-N 0.000 claims description 12
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 12
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 claims description 11
- 230000018044 dehydration Effects 0.000 claims description 8
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- 238000000227 grinding Methods 0.000 abstract 3
- BTXXTMOWISPQSJ-UHFFFAOYSA-N 4,4,4-trifluorobutan-2-one Chemical compound CC(=O)CC(F)(F)F BTXXTMOWISPQSJ-UHFFFAOYSA-N 0.000 abstract 1
- BQACOLQNOUYJCE-FYZZASKESA-N Abietic acid Natural products CC(C)C1=CC2=CC[C@]3(C)[C@](C)(CCC[C@@]3(C)C(=O)O)[C@H]2CC1 BQACOLQNOUYJCE-FYZZASKESA-N 0.000 abstract 1
- FPVVYTCTZKCSOJ-UHFFFAOYSA-N Ethylene glycol distearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCOC(=O)CCCCCCCCCCCCCCCCC FPVVYTCTZKCSOJ-UHFFFAOYSA-N 0.000 abstract 1
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- MKRBAPNEJMFMHU-UHFFFAOYSA-N 1-benzylpyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1CC1=CC=CC=C1 MKRBAPNEJMFMHU-UHFFFAOYSA-N 0.000 description 3
- 206010013786 Dry skin Diseases 0.000 description 3
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- 235000014113 dietary fatty acids Nutrition 0.000 description 2
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010023126 Jaundice Diseases 0.000 description 1
- 206010054949 Metaplasia Diseases 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
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- 238000004220 aggregation Methods 0.000 description 1
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- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 239000002537 cosmetic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- AYOHIQLKSOJJQH-UHFFFAOYSA-N dibutyltin Chemical compound CCCC[Sn]CCCC AYOHIQLKSOJJQH-UHFFFAOYSA-N 0.000 description 1
- 229940008099 dimethicone Drugs 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- 230000009974 thixotropic effect Effects 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
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Abstract
本发明公开了一种耐候型重质碳酸钙的制备方法,是将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;将碳酸钙粗粉、水、PMA和第一表面改性剂加至研磨机,通过湿法研磨,得碳酸钙浆料;所述第一表面改性剂由聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚组成;将碳酸钙浆料输送至高速搅拌机,再加入由N‑苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的第二表面改性剂,高速搅拌混合均匀,脱水,干燥,即得耐候型重质碳酸钙。本方法表面改性得到的重质碳酸钙不仅具有良好的分散性、亲水亲油性能、触变性、加工流动性,还具有良好的化学稳定性、耐候性和耐热性,在建材、涂料、橡胶、密封胶、油墨等行业得到广泛的应用。
Description
技术领域
本发明涉及碳酸钙改性技术领域,具体是一种耐候型重质碳酸钙的制备方法。
背景技术
碳酸钙是一种重要的无机化工产品,被广泛地应用于橡胶、塑料、造纸、涂料、油墨、医药、化妆品、食品等工业中。但由于碳酸钙粒子粒径越小,表面上的原子数越多,则表面能越高,吸附作用越强,各个粒子间相互团聚;其次是碳酸钙作为一种无机填料,粒子表面亲水疏油,与有机高聚物的亲和性差、易形成聚集体,造成高聚物内部缺陷、力学性能变差。为了提高碳酸钙的填充性能,必须采用有效的工艺及表面改性方法对碳酸钙进行表面改性。目前对碳酸钙改性的方法中,主要选用的表面处理剂通常为脂肪酸或其盐,虽然体系的分散性和加工流动性有所改善,但效果不明显。
由于重质碳酸钙的耐候性较差,应用在建材、涂料、橡胶等行业生产中,遇到低温或高温条件下碳酸钙容易发生黄变或出现凝聚现象等。因此,研究具有分散性好、优异耐候性、稳定性好的碳酸钙是当今社会的需求。
发明内容
本发明针对现有重质碳酸钙性能存在的缺陷,提供一种耐候型重质碳酸钙的制备方法。本发明方法通过采用聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚进行一次表面改性,不仅可以提高碳酸钙的分散性、相容性和加工流动性,再用N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的复配表面处理剂进行二次改性,提高了碳酸钙的触变性、稳定性和耐候性。
为了实现以上目的,本发明通过以下技术方案实现:
一种耐候型重质碳酸钙的制备方法,包括以下步骤:
S1:将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;
S2:将碳酸钙粗粉、水、PMA和第一表面改性剂加至研磨机,通过湿法研磨,得碳酸钙浆料;所述第一表面改性剂由聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚组成;
S3:将碳酸钙浆料输送至高速搅拌机,再加入由N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的第二表面改性剂,高速搅拌混合均匀,脱水,干燥,即得耐候型重质碳酸钙。
进一步地,所述碳酸钙粗粉、水、PMA的重量比为100:300-500:5-10。
进一步地,所述第一表面改性剂的加入量为碳酸钙粗粉重量的1.5-3%。
进一步地,所述第一表面改性剂中聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚的重量比为2-4:1。
进一步地,所述第二表面改性剂的加入量为碳酸钙粗粉重量的1-2%。
进一步地,所述N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷的质量比为1:2-3:0.5-1.5。
进一步地,所述湿法研磨是在转速为1000-1500r/min下研磨1-2h。
进一步地,所述碳酸钙浆料的粒径为500-1000目。
进一步地,所述干燥是在温度为80-120℃下干燥。
本发明是基于以下技术原理实现以上方案:
本方法先采用聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚进行一次改性处理,由于聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚中的羟基、长碳链脂肪酸、羧基、羰基等基团,湿法改性中还配以PMA使用,不仅可以提高碳酸钙的分散性和加工流动性,且各基团相互缠绕成网络结构,提高碳酸钙粒子与有机高聚物的相容性,提高填充体系的触变性能。再用N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷进行二次改性处理,能够在碳酸钙粒子表面引入马来酸酐、硅氧键、苯环、酰胺等基团,能够提高碳酸钙的化学稳定性、耐候性和耐热性。
与现有技术相比,本发明的优点及有益效果为:
1、本方法表面改性得到的重质碳酸钙不仅具有良好的分散性、亲水亲油性能、触变性、加工流动性,还具有良好的化学稳定性、耐候性和耐热性,在建材、涂料、橡胶、密封胶、油墨等行业得到广泛的应用。
2、本发明改性得到的碳酸钙填充密封胶,不仅与无机有机基材具有很好的相容性及分散性,提高密封胶的粘性性能和力学性能,还能使密封胶具有优异的耐黄变、耐候性等性能。
3、本发明方法工艺简单、生产效率高、生产成本低、耗能低等优点,容易实现工业化生产。
具体实施方式
下面结合具体实施方式对本发明作进一步详细说明,但限制本发明的范围及其应用。
实施例1
一种耐候型重质碳酸钙的制备方法,包括以下步骤:
S1:将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;
S2:将碳酸钙粗粉、水、PMA按照重量比为100:400:6的比例加至研磨机,并加入重量比为3:1的聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚组成的第一表面改性剂,第一表面处理剂的加入量为碳酸钙粗粉重量的2%,在转速为1000r/min下研磨1.5h,得粒径为700目的碳酸钙浆料;
S3:将碳酸钙浆料输送至高速搅拌机,再加入由重量比为1:2:1的N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的第二表面改性剂,所述第二表面改性剂的加入量为碳酸钙粗粉重量的1.6%,高速搅拌混合均匀,脱水,在100℃干燥,即得耐候型重质碳酸钙。
实施例2
一种耐候型重质碳酸钙的制备方法,包括以下步骤:
S1:将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;
S2:将碳酸钙粗粉、水、PMA按照重量比为100:350:7的比例加至研磨机,并加入重量比为2:1的聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚组成的第一表面改性剂,第一表面处理剂的加入量为碳酸钙粗粉重量的2.4%,在转速为1200r/min下研磨2h,得粒径为1000目的碳酸钙浆料;
S3:将碳酸钙浆料输送至高速搅拌机,再加入由重量比为1:2.5:1.5的N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的第二表面改性剂,所述第二表面改性剂的加入量为碳酸钙粗粉重量的1.5%,高速搅拌混合均匀,脱水,在80℃干燥,即得耐候型重质碳酸钙。
实施例3
一种耐候型重质碳酸钙的制备方法,包括以下步骤:
S1:将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;
S2:将碳酸钙粗粉、水、PMA按照重量比为100:500:8的比例加至研磨机,并加入重量比为4:1的聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚组成的第一表面改性剂,第一表面处理剂的加入量为碳酸钙粗粉重量的3%,在转速为1500r/min下研磨1.5h,得粒径为830目的碳酸钙浆料;
S3:将碳酸钙浆料输送至高速搅拌机,再加入由重量比为1:2:1的N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的第二表面改性剂,所述第二表面改性剂的加入量为碳酸钙粗粉重量的2%,高速搅拌混合均匀,脱水,在90℃干燥,即得耐候型重质碳酸钙。
实施例4
一种耐候型重质碳酸钙的制备方法,包括以下步骤:
S1:将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;
S2:将碳酸钙粗粉、水、PMA按照重量比为100:300:6的比例加至研磨机,并加入重量比为2:1的聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚组成的第一表面改性剂,第一表面处理剂的加入量为碳酸钙粗粉重量的1.5%,在转速为1200r/min下研磨1h,得粒径为600目的碳酸钙浆料;
S3:将碳酸钙浆料输送至高速搅拌机,再加入由重量比为1:2.5:0.5的N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的第二表面改性剂,所述第二表面改性剂的加入量为碳酸钙粗粉重量的2%,高速搅拌混合均匀,脱水,在100℃干燥,即得耐候型重质碳酸钙。
实施例5
一种耐候型重质碳酸钙的制备方法,包括以下步骤:
S1:将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;
S2:将碳酸钙粗粉、水、PMA按照重量比为100:400:8的比例加至研磨机,并加入重量比为3:1的聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚组成的第一表面改性剂,第一表面处理剂的加入量为碳酸钙粗粉重量的2%,在转速为1200r/min下研磨1.5h,得粒径为500目的碳酸钙浆料;
S3:将碳酸钙浆料输送至高速搅拌机,再加入由重量比为1:2:0.5的N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的第二表面改性剂,所述第二表面改性剂的加入量为碳酸钙粗粉重量的1.8%,高速搅拌混合均匀,脱水,在120℃干燥,即得耐候型重质碳酸钙。
实施例6
一种耐候型重质碳酸钙的制备方法,包括以下步骤:
S1:将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;
S2:将碳酸钙粗粉、水、PMA按照重量比为100:500:7的比例加至研磨机,并加入重量比为2:1的聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚组成的第一表面改性剂,第一表面处理剂的加入量为碳酸钙粗粉重量的3%,在转速为1500r/min下研磨1.5h,得粒径为700目的碳酸钙浆料;
S3:将碳酸钙浆料输送至高速搅拌机,再加入由重量比为1:3:1的N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的第二表面改性剂,所述第二表面改性剂的加入量为碳酸钙粗粉重量的1.5%,高速搅拌混合均匀,脱水,在120℃干燥,即得耐候型重质碳酸钙。
对比例
S1:将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;
S2:将碳酸钙粗粉、水、PMA按照重量比为100:500:7的比例加至研磨机,并加入碳酸钙粗粉重量的4.5%的硬脂酸钠,在转速为1500r/min下研磨1.5h,得粒径为700目的碳酸钙浆料;
S3:将碳酸钙浆料经脱水,在120℃干燥,即得重质碳酸钙。
将本发明实施例1-6和对比例制备的重质碳酸钙产品应用在密封胶的填料,所述密封胶由以下重量份数的原料组成:有机羟基硅酮80份、有机甲基硅酮 20份、二甲基硅油10份、重质碳酸钙60份、气相二氧化硅5份、交联剂1.5份、二丁基二月硅酸锡0.5份和硅烷偶联剂2份,并按照常规的方法制成密封胶。将所得的密封胶按照常规方法测定密封胶的拉伸强度、断裂伸长率、耐黄变及耐候性能,测试结果如表1所示。拉伸强度按 GB/T528-2009标准,断裂伸长率按 GB/T528-2009 标准,耐候性能参考ASTMC1184和JCT 485-2007 《建筑窗用弹性密封胶》进行测试。耐黄变性能:密封胶从胶管挤出胶料后,马上放入120℃烘箱,24小时不发黄。耐候性能:将固化 7 天后的胶片放进紫外线老化试验箱中,每隔一段时间观察外观,用不干胶粘胶片表面,观察表面是否黄变、开裂或粉化。
表1:本发明重质碳酸钙应用在密封胶的性能测试结果
产品 | 拉伸强度(MPa) | 断裂伸长率(%) | 耐黄变性能 | 耐候性 |
实施例1 | 0.97 | 576 | 无 | 无变化 |
实施例2 | 0.86 | 481 | 无 | 无变化 |
实施例3 | 0.93 | 563 | 无 | 无变化 |
实施例4 | 0.76 | 431 | 无 | 无变化 |
实施例5 | 0.85 | 539 | 无 | 无变化 |
实施例6 | 0.90 | 497 | 无 | 无变化 |
对比例 | 0.68 | 327 | 表面发黄 | 发黄并开裂 |
从上述结果得知,本发明改性的重质碳酸钙与经过硬脂酸钠改性的产品,填充密封胶后具有很好的拉伸强度和断裂伸长率,且耐黄变及耐候性更加优异。
以上内容是结合具体的/优选的实施方式对本发明所作的进一步详细说明,不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说,在不脱离本发明构思的前提下,其还可以对这些已描述的实施例做出若干替代或变型,而这些替代或变型方式都应视为属于本发明的保护范围。
Claims (9)
1.一种耐候型重质碳酸钙的制备方法,其特征在于:包括以下步骤:
S1:将石灰石加入粉碎机,粉碎至粒径≤0.25mm,得碳酸钙粗粉;
S2:将碳酸钙粗粉、水、PMA和第一表面改性剂加至研磨机,通过湿法研磨,得碳酸钙浆料;所述第一表面改性剂由聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚组成;
S3:将碳酸钙浆料输送至高速搅拌机,再加入由N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷组成的第二表面改性剂,高速搅拌混合均匀,脱水,干燥,即得耐候型重质碳酸钙。
2.根据权利要求1所述耐候型重质碳酸钙的制备方法,其特征在于:所述碳酸钙粗粉、水、PMA的重量比为100:300-500:5-10。
3.根据权利要求1所述耐候型重质碳酸钙的制备方法,其特征在于:所述第一表面改性剂的加入量为碳酸钙粗粉重量的1.5-3%。
4.根据权利要求3所述耐候型重质碳酸钙的制备方法,其特征在于:所述第一表面改性剂中聚乙二醇双硬脂酸酯和聚氧丙烯聚氧乙烯甘油醚的重量比为2-4:1。
5.根据权利要求1所述耐候型重质碳酸钙的制备方法,其特征在于:所述第二表面改性剂的加入量为碳酸钙粗粉重量的1-2%。
6.根据权利要求5所述耐候型重质碳酸钙的制备方法,其特征在于:所述N-苯基马来酰亚胺、松香酸二乙醇酰胺醚羧酸钠和八氨基苯基笼形倍半硅氧烷的质量比为1:2-3:0.5-1.5。
7.根据权利要求1所述耐候型重质碳酸钙的制备方法,其特征在于:所述湿法研磨是在转速为1000-1500r/min下研磨1-2h。
8.根据权利要求1所述耐候型重质碳酸钙的制备方法,其特征在于:所述碳酸钙浆料的粒径为500-1000目。
9.根据权利要求1所述耐候型重质碳酸钙的制备方法,其特征在于:所述干燥是在温度为80-120℃下干燥。
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