Method for preparing sand-coated phenolic resin
The invention provides a method for preparing sand-coated phenolic resin, which comprises the steps: mixing waste fluid containing phenol, aldehyde solution and catalyst to be subject to condensation reaction at the constant temperature of 90-110 DEG C, wherein mass ratio of total mass of the waste...
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| creator | MENG XIANGJIN ZHANG JUAN TANG YILIN JIAO QIULING |
| description | The invention provides a method for preparing sand-coated phenolic resin, which comprises the steps: mixing waste fluid containing phenol, aldehyde solution and catalyst to be subject to condensation reaction at the constant temperature of 90-110 DEG C, wherein mass ratio of total mass of the waste fluid containing phenol and the aldehyde solution to the catalyst is 100:(1-5), and the mass ratio of the phenol in the waste fluid containing phenol to aldehyde in the aldehyde solution is 100:(25-40); standing and then separating a condensation reaction product to obtain phenolic resin fluid with low molecular weight and low-concentration waste fluid containing phenol; mixing the phenolic resin fluid with the low molecular weight and an initiator to perform polymerization reaction at the constant temperature of 140-160 DEG C, finishing the reaction until weight-average molecular weight of the product is 1000-1600 and obtaining the sand-coated phenolic resin, wherein the mass ratio of initiator to the phenolic res |
| format | Patent |
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standing and then separating a condensation reaction product to obtain phenolic resin fluid with low molecular weight and low-concentration waste fluid containing phenol; mixing the phenolic resin fluid with the low molecular weight and an initiator to perform polymerization reaction at the constant temperature of 140-160 DEG C, finishing the reaction until weight-average molecular weight of the product is 1000-1600 and obtaining the sand-coated phenolic resin, wherein the mass ratio of initiator to the phenolic res</description><language>chi ; eng</language><subject>CASTING ; CHEMISTRY ; COMPOSITIONS BASED THEREON ; FOUNDRY MOULDING ; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ; METALLURGY ; ORGANIC MACROMOLECULAR COMPOUNDS ; PERFORMING OPERATIONS ; POWDER METALLURGY ; THEIR PREPARATION OR CHEMICAL WORKING-UP ; TRANSPORTING</subject><creationdate>2012</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20120627&DB=EPODOC&CC=CN&NR=102516481A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20120627&DB=EPODOC&CC=CN&NR=102516481A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>MENG XIANGJIN</creatorcontrib><creatorcontrib>ZHANG JUAN</creatorcontrib><creatorcontrib>TANG YILIN</creatorcontrib><creatorcontrib>JIAO QIULING</creatorcontrib><title>Method for preparing sand-coated phenolic resin</title><description>The invention provides a method for preparing sand-coated phenolic resin, which comprises the steps: mixing waste fluid containing phenol, aldehyde solution and catalyst to be subject to condensation reaction at the constant temperature of 90-110 DEG C, wherein mass ratio of total mass of the waste fluid containing phenol and the aldehyde solution to the catalyst is 100:(1-5), and the mass ratio of the phenol in the waste fluid containing phenol to aldehyde in the aldehyde solution is 100:(25-40); 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standing and then separating a condensation reaction product to obtain phenolic resin fluid with low molecular weight and low-concentration waste fluid containing phenol; mixing the phenolic resin fluid with the low molecular weight and an initiator to perform polymerization reaction at the constant temperature of 140-160 DEG C, finishing the reaction until weight-average molecular weight of the product is 1000-1600 and obtaining the sand-coated phenolic resin, wherein the mass ratio of initiator to the phenolic res</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CASTING CHEMISTRY COMPOSITIONS BASED THEREON FOUNDRY MOULDING MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS POWDER METALLURGY THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING |
| title | Method for preparing sand-coated phenolic resin |
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