CAS: 19438-64-3; 6-Methyl-3A,4,5,7A-Tetrahydro-2-Benzofuran-1,3-Dione

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CAS号3425-89-6 4-甲基四氢苯酐

4-甲基四氢苯酐置于potaassium-Loaded Al2O3体系中,150.0 °C,300.01 Kpa 条件下,反应生成甲基四氢苯酐
参考文献:3/4-甲基四氢邻苯二甲酸酐 (3/4-Mthpa) 与酸碱改性 γ-Al2O3 催化剂的连续多相异构化
标题:3/4-甲基四氢邻苯二甲酸酐 (3/4-Mthpa) 与酸碱改性 γ-Al2O3 催化剂的连续多相异构化
摘要:将一系列酸碱负载的γ-Al 2 O 3催化剂用作3/4-甲基-四氢邻苯二甲酸酐异构化的催化剂.以碱性金属(k或na)为碱源,磷(p)为酸源,采用等体积浸渍法对γ-Al 2 O 3进行改性.采用nh 3 /co 2-Tpd,Xrd,Tem/eds,Bet和tga对催化剂进行分析,确定15%-K/al 2 O 3和10%-P/al 2 O 3为最适当的催化剂.使用核磁共振 ( 1H-NMR)和红外光谱(ir),并提出了异构体形成的反应机理.以3-Mthpa为底物,酸碱反应温度为165/150°C,反应时间为3H,催化剂用量为3%.设计了一种新型连续异构固定床反应器.测试了催化剂的稳定性,运行10小时后活性损失为4.6-6.6%.
Doi:10.1039/d2Nj05002A

专利信息

专利号:US-9617396-B2
优先权日:2012-02-22
标 题:Method for in-situ synthesis of silicon nanoparticles
发明人：SCHUBERT CHLOÉ; PONCELET OLIVIER
权利人:COMMISSARIAT ENERGIE ATOMIQUE
摘要:The invention relates to a method for in-situ synthesis of silicon nanoparticles in a thermosetting polymeric matrix, the thermosetting and thermoset matrices obtained in this way and a material including same. The method includes the following steps: a) forming an aqueous-phase/organic-phase inverse emulsion, wherein the aqueous phase includes at least a basic catalyst and the organic phase includes at least a non-cross-linked (co)polymer precursor chosen from an aliphatic, cycloaliphatic or aromatic epoxy resin precursor, a polyester-imide precursor, an unsaturated/epoxy polyester (co)polymer precursor, a polyether/epoxy (co)polymer precursor and a polyurethane precursor; b) introducing, into the inverse emulsion formed in step a), at least one silicon precursor forming a complete network whereof the rate of hydrolysis is greater than the cross-linking speed of the (co)polymer and c) stirring the mixture obtained in step b) and heating to a temperature between 20° C. and 70° C.

专利号:US-10968308-B2
优先权日:2017-11-07
标 题 :Preparation method of epoxy compound having alkoxysilyl group, epoxy compound having alkoxysilyl group, composition comprising the same, and use thereof
发明人：CHUN HYUN AEE; KIM YUN JU; PARK SOOK YEON; PARK SU JIN
权利人:KOREA INST IND TECH
摘要:Provided are a preparation method of an epoxy compound having an alkoxysilyl group in which an increase in the epoxy equivalent weight (EEW) of the epoxy compound is minimized because alkoxysilylation occurs through a simple one-step reaction using a hydroxyl group formed during the synthesis of the epoxy compound, an epoxy compound having an alkoxysilyl group prepared by the method, a composition comprising the same, and a use thereof. The method includes the reaction of an epoxy compound having a hydroxyl group with an isocyanate alkoxysilane in the presence of amine-based base catalyst, wherein the epoxy compound having an alkoxysilyl group has a mole ratio of [epoxide group]:[alkoxysilyl group] of n:1 ranging from 2:1 to 10:1, and an EEW increase of the epoxy compound having an alkoxysilyl group is less than 260/n. The epoxy compound has good physical properties when being cured.

专利号:US-7273902-B2
优先权日:2003-09-05
标题:Stabilizer against hydrolysis for an ester-group-containing resin and a thermoplastic resin composition
发明人：TAKAHASHI IKUO; IIDA HIROTAKA; YANAGISAWA KEN-ICHI
权利人:NISSHIN SPINNING
摘要:A stabilizer against hydrolysis, which can solve conventional problems of a carbodiimide compound compounded in an ester-group-containing resin or a biodegradable plastic as a stabilizer against hydrolysis, such as poor heat resistance and a coloring problem due to yellowing, and can provide enhanced resistance against hydrolysis, and a thermoplastic resin composition of an ester-group-containing resin or a biodegradable plastic containing the same. Specifically, that the stabilizer against hydrolysis includes a carbodiimide composition comprising an aliphatic carbodiimide compound (A) and a phosphorus antioxidant (B), preferably the stabilizer contains a carbodiimide composition wherein a phosphorus antioxidant (B 1 ) is dispersed and present in the carbodiimide composition by admixing the phosphorus antioxidant (B 1 ) during synthesis of the aliphatic carbodiimide compound (A), and a thermoplastic resin composition having a superior stability against hydrolysis, characterized in that said stabilizer against hydrolysis is compounded in an easily hydrolysable resin (C).

专利号:US-9382462-B2
优先权日:2013-03-15
标 题:Metal ligand-containing prepolymers, methods of synthesis, and compositions thereof
发明人：RAO CHANDRA; DENG JUN; LIN RENHE
权利人:PRC DESOTO INT INC
摘要:Metal ligand-containing prepolymers, compositions containing metal ligand-containing prepolymers, methods of synthesizing metal ligand-containing prepolymers and the use of metal ligand-containing prepolymers in aerospace sealant applications are disclosed. The metal ligand-containing prepolymers have metal ligands incorporated into the backbone of the prepolymer. Cured sealant compositions comprising the metal ligand-containing prepolymers exhibit enhanced properties suitable for aerospace sealant applications.

专利号:US-7368493-B2
优先权日:2003-08-07
标 题 :Carbodiimide composition with suppressed yellowing, a stabilizer against hydrolysis and a thermoplastic resin composition
发明人：TAKAHASHI IKUO; IIDA HIROTAKA; NAKAMURA NORIMASA
权利人:NISSHIN SPINNING
摘要:A carbodiimide composition having an improved heat resistance which meets conventional requirements for a carbodiimide compound to be compounded in an ester-group-containing resin or a biodegradable plastic, and exhibiting no coloring problems due to yellowing, and having a superior stabilizing effect agains hydrolysis. The carbodiimide composition comprises a carbodiimide compound (A) and an antioxidant (B), having a 5% weight loss temperature not lower than 250° C. as determined by a thermogravimetric (TG) method, wherein an antioxidant (B) is dispersed and present in the composition by admixing during synthesis of a carbodiimide compound (A), a stabilizer against hydrolysis mainly comprising the carbodiimide composition and a thermoplastic resin composition containing the same.

专利号:CN-109158067-A
优先权日:2018-11-07
标 题:A process device for chemical synthesis of isomeric molecular distillation and purification of methyltetrahydrophthalic anhydride