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公开(公告)号:US4848442A
公开(公告)日:1989-07-18
申请号:US106024
申请日:1987-10-08
申请人: Raja Iyer , Rasik C. Shah , Robert A. Laitar
发明人: Raja Iyer , Rasik C. Shah , Robert A. Laitar
CPC分类号: C08G8/36 , B22C1/2253 , C08L61/14
摘要: An alkoxy-modified phenolic resole resin providing an improved binder for foundry cores and molds. The resin has predominantly ortho-ortho benzylic ether bridges joining the phenolic nuclei in the resin and at least one alkoxymethylene group for every 20 phenolic nuclei.
摘要翻译: 烷氧基改性酚醛树脂树脂,为铸造芯和模具提供改进的粘合剂。 该树脂主要是邻二苄基醚桥连接树脂中的酚核和每20个酚核的至少一个烷氧基亚甲基。
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公开(公告)号:US4657950A
公开(公告)日:1987-04-14
申请号:US660169
申请日:1984-10-12
申请人: Raja Iyer , Rasik C. Shah , Robert A. Laitar
发明人: Raja Iyer , Rasik C. Shah , Robert A. Laitar
IPC分类号: C08L61/00 , B22C1/22 , C08G8/00 , C08G8/04 , C08G8/36 , C08L61/04 , C08L61/06 , C08L61/14 , C08K3/22 , C04B26/12
CPC分类号: B22C1/2253 , C08G8/36 , C08L61/14
摘要: Refractory shaped articles are prepared by heating refractory mixes comprised of refractory particles and an alkoxy modified phenolic resole resin having at least one alkoxy methylene group for every 20 phenolic hydroxyl groups.
摘要翻译: 通过加热由耐火材料颗粒组成的难熔混合物和每20个酚羟基具有至少一个烷氧基亚甲基的烷氧基改性酚醛树脂树脂来制备耐火材料制品。
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公开(公告)号:US4668759A
公开(公告)日:1987-05-26
申请号:US760846
申请日:1985-07-31
申请人: Raja Iyer , Rasik C. Shah
发明人: Raja Iyer , Rasik C. Shah
IPC分类号: C08G8/00 , B22C1/22 , C04B35/01 , C08G8/04 , C08G8/28 , C08G8/36 , C08L61/04 , C08L61/06 , C08L61/10
CPC分类号: C08G8/04 , B22C1/2253 , C04B35/013
摘要: A process for preparing modified phenolic resole resins providing improved binders for refractories and foundry cores and molds. The resins are prepared by treating a phenol with a molar excess of aldehyde in the presence of an alkaline catalyst followed by further reaction at a pH below 7 in the presence of a catalyst which promotes formation of ortho-ortho benzylic ether bridges between the phenolic nuclei.
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公开(公告)号:US4740535A
公开(公告)日:1988-04-26
申请号:US22933
申请日:1987-03-06
申请人: Raja Iyer , Rasik C. Shah
发明人: Raja Iyer , Rasik C. Shah
IPC分类号: C08G8/00 , B22C1/22 , C04B35/01 , C08G8/04 , C08G8/28 , C08G8/36 , C08L61/04 , C08L61/06 , C08L61/10 , C08G8/38
CPC分类号: C08G8/04 , B22C1/2253 , C04B35/013
摘要: A process for preparing modified phenolic resole resins providing improved binders for refractories and foundry cores and molds. The resins are prepared by treating a phenol with a molar excess of aldehyde in the presence of an alkaline catalyst followed by further reaction at a pH below 7 in the presence of a catalyst which promotes formation of ortho-ortho benzylic ether bridges between the phenolic nuclei.
摘要翻译: 制备改性酚醛树脂树脂的方法,提供改进的耐火材料和铸造芯和模具的粘合剂。 树脂通过在碱性催化剂的存在下用摩尔过量的醛处理苯酚,然后在催化剂的存在下在pH低于7的情况下进一步反应来制备,所述催化剂促进酚核之间的邻位苄基醚桥的形成 。
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公开(公告)号:US4644022A
公开(公告)日:1987-02-17
申请号:US802280
申请日:1985-11-27
申请人: Raja Iyer
发明人: Raja Iyer
CPC分类号: B22C1/2233 , C08L61/00
摘要: A cold-setting foundry binder composition, which provides foundry cores and molds with improved curing speed, comprising a particulate refractory material, a resin binder, an acid curing catalyst, and an accelerator. The accelerator is selected from the group: dihydroxybenzenes, derivatives of dihydroxybenzenes, trihydroxybenzenes, and their mixtures.
摘要翻译: 一种冷成型铸造粘合剂组合物,其提供具有改进的固化速度的铸造芯和模具,其包含颗粒状耐火材料,树脂粘合剂,酸固化催化剂和促进剂。 促进剂选自二羟基苯,二羟基苯衍生物,三羟基苯及其混合物。
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公开(公告)号:US5043412A
公开(公告)日:1991-08-27
申请号:US403048
申请日:1989-09-01
CPC分类号: B22C1/2253 , C08L61/06
摘要: A raw batch composition for use in making a shaped article such as a foundry shape or refractory article is disclosed. The composition comprises a mixture of an aggregate material; a phenol formaldehyde novolak resin; a phenol formaldehyde resole resin; and an ester functional curing agent. A shaped article prepared from the composition and processes for making a refractory body or foundry article are also disclosed.
摘要翻译: 公开了一种用于制造诸如铸造形状或耐火物品的成型制品的生料批料组合物。 组合物包含聚集体材料的混合物; 苯酚甲醛酚醛清漆树脂; 苯酚甲醛树脂; 和酯官能化固化剂。 还公开了由组合物制备的成型制品以及用于制备耐火体或铸造制品的方法。
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公开(公告)号:US4336179A
公开(公告)日:1982-06-22
申请号:US245294
申请日:1981-03-19
申请人: Raja Iyer
发明人: Raja Iyer
CPC分类号: C08L61/06 , B22C1/2253 , C08G8/10
摘要: A granular composition is provided that is especially useful for the preparation of foundry cores and molds. Incorporated in the composition is a novel resin binder that imparts rapid curing properties to the composition.
摘要翻译: 提供了一种特别可用于制备铸造芯和模具的颗粒组合物。 组合物中含有一种赋予组合物快速固化性能的新型树脂粘合剂。
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