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Modified phenolic resin, preparation method and refractory material containing modified phenolic resin
The invention discloses a preparation method for modified phenolic resin used for a refractory material. The preparation method comprises the following steps: adding papermaking wastes, phenol and anacid catalyst into a reaction kettle, and carrying out blending; carrying out heating, then dropwise adding aldehyde into the reaction kettle, and after the aldehyde is added, carrying out full reaction; carrying out dehydrating in vacuum, releasing the vacuum when a temperature is 100-130 DEG C, and continuing the reaction; and carrying out dehydrating again under reduced pressure so as to obtainthe phenolic resin used for the refractory material. The invention further provides the refractory material. The refractory material comprises the following components in parts by weight: 40-75 partsof magnesia-calcium sand, 20-50 parts of aluminum oxide, 7-18 parts of carbon and 3-9 parts of the modified phenolic resin. The modified phenolic resin provided by the invention has the following advantages: the papermaking wastes are adopted for chemically modifying the phenolic resin, so the heat resistance of the resin is effectively improved; meanwhile, the carbon residue rate and the bondingstrength of the resin are improved; and the high-temperature strength of the prepared refractory material is higher than the high-temperature strength of conventional phenolic resin.
本发明公开了一种耐火材料用改性酚醛树脂的制备方法，包括如下步骤：将造纸废弃物、酚、酸性催化剂加入反应釜共混；升温后向反应釜中滴加醛，加入完毕后充分反应；真空脱水，温度为100‑130℃时解除真空，继续反应；再次进行减压脱水，得到所述耐火材料用酚醛树脂。本发明进一步提供一种耐火材料，其成分包括如下重量份的组分：镁钙砂40‑75份；氧化铝20‑50份；碳素7‑18份和改性酚醛树脂3‑9份。本发明改性酚醛树脂采用造纸废弃物对酚醛树脂进行化学改性，有效提高树脂的耐热性，同时使树脂残碳率和粘结强度提高，制备的耐火材料高温强度高于常规酚醛树脂。
Modified phenolic resin, preparation method and refractory material containing modified phenolic resin
The invention discloses a preparation method for modified phenolic resin used for a refractory material. The preparation method comprises the following steps: adding papermaking wastes, phenol and anacid catalyst into a reaction kettle, and carrying out blending; carrying out heating, then dropwise adding aldehyde into the reaction kettle, and after the aldehyde is added, carrying out full reaction; carrying out dehydrating in vacuum, releasing the vacuum when a temperature is 100-130 DEG C, and continuing the reaction; and carrying out dehydrating again under reduced pressure so as to obtainthe phenolic resin used for the refractory material. The invention further provides the refractory material. The refractory material comprises the following components in parts by weight: 40-75 partsof magnesia-calcium sand, 20-50 parts of aluminum oxide, 7-18 parts of carbon and 3-9 parts of the modified phenolic resin. The modified phenolic resin provided by the invention has the following advantages: the papermaking wastes are adopted for chemically modifying the phenolic resin, so the heat resistance of the resin is effectively improved; meanwhile, the carbon residue rate and the bondingstrength of the resin are improved; and the high-temperature strength of the prepared refractory material is higher than the high-temperature strength of conventional phenolic resin.
本发明公开了一种耐火材料用改性酚醛树脂的制备方法，包括如下步骤：将造纸废弃物、酚、酸性催化剂加入反应釜共混；升温后向反应釜中滴加醛，加入完毕后充分反应；真空脱水，温度为100‑130℃时解除真空，继续反应；再次进行减压脱水，得到所述耐火材料用酚醛树脂。本发明进一步提供一种耐火材料，其成分包括如下重量份的组分：镁钙砂40‑75份；氧化铝20‑50份；碳素7‑18份和改性酚醛树脂3‑9份。本发明改性酚醛树脂采用造纸废弃物对酚醛树脂进行化学改性，有效提高树脂的耐热性，同时使树脂残碳率和粘结强度提高，制备的耐火材料高温强度高于常规酚醛树脂。
Modified phenolic resin, preparation method and refractory material containing modified phenolic resin
一种改性酚醛树脂、制备方法及含有该改性酚醛树脂的耐火材料
SHI XIAODAN (author) / SUN HAIQIANG (author) / ZHENG LU (author)
2020-05-01
Patent
Electronic Resource
Chinese
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