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公开(公告)号：USRE32812E
公开(公告)日：1988-12-27
申请号：US860204
申请日：1986-05-06
摘要： A foundry moulding composition comprising(a) a granular refractory material,(b) from 0.25 to 2.5% based on the weight of the refractory material of an aqueous solution of a potassium alkali phenol-formaldehyde resin, said aqueous solution having a solids content of from 50 to 75% and said resin having a weight average molecular weight (M.sub.wr) of from 700 to 2000, a formaldehyde:phenol molar ratio of from 1.2:1 to 2.6:1 and a potassium hydroxide:phenol molar ratio of from 0.5:1 to 1.2:1;(c) from 0.05 to 3% based on the weight of said aqueous solution, of at least one silane, and(d) from 20 to 110% based on the weight of said aqueous solution of at least one ester active to catalyze curing of said resin.
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公开(公告)号：US5032642A
公开(公告)日：1991-07-16
申请号：US511750
申请日：1990-04-20
CPC分类号： C08G8/32 , B22C1/2253 , C08G8/10 , C08K5/101
摘要： A phenolic resin composition comprises an ester-curable phenol-aldehyde resin in alkaline aqueous solution wherein the phenol-aldehyde resin is a methylolated phenolic novolak resin. Preferably, during manufacture of the methylolated phenolic novolak resin, unreacted phenol is removed. The composition may be employed, for reaction with an organic ester hardener, as a binder in the production of foundry moulds and cores having high strength. The further incorporation of an aryloxy alcohol in the novolak resin binder additionally improves the final strength of products obtained by a gas curing technique using ester vapor, such as that of methyl formate.
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公开(公告)号：US5051454A
公开(公告)日：1991-09-24
申请号：US450989
申请日：1989-12-15
IPC分类号： C08G8/10 , B22C1/22 , C04B26/12 , C08G8/00 , C08G8/20 , C08G8/24 , C08G8/28 , C08G8/32 , C08K5/10 , C09D161/06
CPC分类号： C04B26/122 , B22C1/2253 , C08K5/10
摘要： The present invention relates to phenolic resin compositions and methods for making cured phenolic resin compositions. The phenolic resin compositions of this invention comprise an esterified phenolic compound and a base and optionally an unesterified phenolic resole resin. The composition cures in the presence of water or other polar solvent. The esterified phenolic compound contains at least one phenolic hydroxyl group or an esterified phenolic hydroxyl group and further contains at least one esterified methylol group positioned ortho or para to a phenolic hydroxyl group or an esterified phenolic group.The compounds find particular use in bonding refractory materials, such as sand, in the production of foundry moulds and cores and in treating subterranean formations. These composition have the advantage that cure can be obtained at room temperature without the use of strong alkali. The use of this system also prevents the release of alcohols during the saponification stage of the ester cure process.
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4.发明授权Process for the manufacture of frictional elements and frictional elements produced thereby 失效用于制造由此产生的摩擦元件和摩擦元件的方法
公开(公告)号：US4831067A
公开(公告)日：1989-05-16
申请号：US008381
申请日：1987-01-29
CPC分类号： F16D69/025 , F16D69/021
摘要： A method for the manufacture of shaped frictional elements is provided. The method comprises mixing a first portion of a frictional filler with from 5% to 30% of certain liquid, alkaline, phenol-formaldehyde resins; mixing a second portion of the same or a different frictional filler with a liquid ester curing catalyst for the phenyl-formaldehyde resin; intimately mixing the first and second portions; and allowing the resultant mixture to cure in a mould. A composition comprising a frictional filler, the above resin, and a curing catalyst is also provided. The disclosed method is quick and economical and is carried out at room temperature without the hazards and inconveniences associated with heated moulds.
摘要翻译： 提供了一种用于制造成形摩擦元件的方法。 该方法包括将摩擦填料的第一部分与5％至30％的某些液体，碱性，酚醛树脂混合; 将相同或不同的摩擦填料的第二部分与苯甲醛树脂的液体酯固化催化剂混合; 紧密地混合第一和第二部分; 并使所得混合物在模具中固化。 还提供了包含摩擦填料，上述树脂和固化催化剂的组合物。 所公开的方法是快速和经济的，并且在室温下进行，而没有与加热模具相关的危险和不便。
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公开(公告)号：USRE32720E
公开(公告)日：1988-07-26
申请号：US900618
申请日：1986-08-26
CPC分类号： C08G16/0218 , B22C1/2253 , C08G8/28 , C08K5/54
摘要： A foundry moulding composition comprising (a) a granular refractory material, and (b) from 0.5% to 8% based on the weight of the refractory material of a binder comprising (i) an aqueous solution of a potassium alkali phenol-formaldehyde resin, said aqueous solution having a solids content of from 50% to 75% and said resin having a weight average molecular weight (M.sub.w) of from 600 to 1500, a formaldehyde:phenol molar ratio of from 1.2:1 to 2.6:1 and a potassium hydroxide:phenol molar ratio of from 0.2:1 to 1.2:1 and (ii) at least one silane in an amount of from 0.05% to 3% based on the weight of said aqueous solution, said binder being curable by contact therewith of from 5% to 60% based on the weight of said aqueous solution of a C.sub.1-3 alkyl formate.
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公开(公告)号：US4468359A
公开(公告)日：1984-08-28
申请号：US440278
申请日：1982-11-09
CPC分类号： C08G8/10 , B22C1/2253 , C08L61/14
摘要： A foundry moulding composition comprising (a) a granular refractory material, and (b) from 0.5% to 8% based on the weight of the refractory material of a binder comprising (i) an aqueous solution of a potassium alkali phenol-formaldehyde resin, said aqueous solution having a solids content of from 50% to 75% and said resin having a weight average molecular weight (M.sub.w) of from 600 to 1500, a formaldehyde:phenol molar ratio of from 1.2:1 to 2.6:1 and a potassium hydroxide:phenol molar ratio of from 0.2:1 to 1.2:1 and (ii) at least one silane in an amount of from 0.05% to 3% based on the weight of said aqueous solution, said binder being curable by contact therewith of from 5% to 60% based on the weight of said aqueous solution of a C.sub.1-3 alkyl formate.
摘要翻译： 一种铸造模制组合物，其包含（a）颗粒耐火材料，和（b）基于粘合剂的耐火材料重量的0.5％至8％，其包含（i）钾碱性酚醛树脂的水溶液， 所述水溶液的固体含量为50％至75％，所述树脂的重均分子量（＆amp; upbar＆Mw）为600至1500，甲醛：苯酚摩尔比为1.2:1至2.6:1，和 氢氧化钾：苯酚的摩尔比为0.2:1至1.2:1，和（ii）至少一种硅烷的量为所述水溶液重量的0.05％至3％，所述粘合剂可通过与其接触而固化 基于所述C 1-3烷基甲酸盐水溶液的重量，为5％至60％。
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公开(公告)号：US5340888A
公开(公告)日：1994-08-23
申请号：US29304
申请日：1993-03-08
CPC分类号： C04B26/122 , B22C1/2253 , C08K5/10 , Y10S525/924
摘要： The present invention is directed to a phenolic resin composition suitable for use in bonding refractory materials, such as sand, in the production of foundry moulds and cores and also in treating subterranean formations. The phenolic resin composition comprises an esterified phenolic compound, a phenolic novolak resin and a base, which will react to provide final cure in the presence of water or other polar solvent. The composition, once reacted, will bond granular refractory materials. The esterified phenolic compound contains at least one esterified methylol group positioned ortho or para to a phenolic hydroxyl group or an esterified phenolic hydroxyl group. Included within the invention are anhydrous precursors to the reactive phenolic resin composition and also foundry moulding compositions which incorporate the reactive phenolic resin compositions. Other embodiments of the invention include methods for making foundry moulds and cores and methods for curing the reactive phenolic resin composition.
摘要翻译： 本发明涉及一种适用于粘结耐火材料如砂的酚醛树脂组合物，用于生产铸造模具和芯体，以及处理地下地层。 酚醛树脂组合物包含酯化的酚类化合物，酚醛清漆树脂和碱，其将在水或其它极性溶剂的存在下反应以提供最终固化。 组合物一旦反应就会粘结颗粒状耐火材料。 酯化酚类化合物含有至少一个位于酚羟基或酯化酚羟基的邻位或对位的酯化羟甲基。 本发明中包括反应性酚醛树脂组合物的无水前体，以及掺入反应性酚醛树脂组合物的铸造模制组合物。 本发明的其它实施方案包括制造铸模和芯的方法以及用于固化反应性酚醛树脂组合物的方法。
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公开(公告)号：US5027890A
公开(公告)日：1991-07-02
申请号：US593748
申请日：1990-10-05
CPC分类号： B22C1/162 , B22C1/00 , B22C1/2253
摘要： The invention relates to foundary moulding compositions useful for producing moulds for the manufacture of metal castings wherein the moulds are capable of giving castings with good surface finish without the need for conventional separate blacking applications. A foundary moulding composition of the invention comprises refractory material such as sand, alkali phenol-formaldehyde resole resin solution, carbonifiable material such as styrenated phenol, and an effective amount of an organic ester for hardening the composition. In another embodiment, the invention is a binder composition comprising alkali phenol-formaldehyde resole resin solution and carbonifiable material capable of being hardened by reaction with organic ester. In another embodiment, the invention is a curing additive for a foundry binder comprising carbonifiable material and liquid ester such as gamma-butyrolactone, and the like. In another embodiment, the invention is a method of making a foundry mould wherein a mixture of sand, resin and carbonifiable material is shaped, and then hardened with a gaseous ester such as methyl formate.
摘要翻译： 本发明涉及可用于制造用于制造金属铸件的模具的铸造模制组合物，其中模具能够赋予具有良好表面光洁度的铸件，而不需要常规的单独的黑色应用。 本发明的复合模塑组合物包括耐火材料如砂，碱性酚醛甲醛树脂溶液，可碳化材料如苯乙烯化苯酚和有效量的用于硬化组合物的有机酯。 在另一个实施方案中，本发明是包含碱性酚醛甲醛树脂溶液和能够通过与有机酯反应而硬化的可碳化材料的粘合剂组合物。 在另一个实施方案中，本发明是用于包含可碳化材料和液体酯如γ-丁内酯等的铸造粘合剂的固化添加剂。 在另一个实施方案中，本发明是制造铸造模具的方法，其中砂，树脂和可碳化材料的混合物成型，然后用气态酯如甲酸甲酯硬化。
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公开(公告)号：US4980394A
公开(公告)日：1990-12-25
申请号：US295520
申请日：1989-01-11
CPC分类号： B22C1/162 , B22C1/00 , B22C1/2253
摘要： The invention relates to foundry moulding compositions useful for producing moulds for the manufacture of metal castings wherein the moulds are capable of giving castings with good surface finish without the need for conventional separate blacking applications. A foundry moulding composition of the invention comprises refractory material such as sand, alkali phenol-formaldehyde resole resin solution, carbonifiable material such as styrenated phenol, and an effective amount of an organic ester for hardening the composition. In another embodiment, the invention is a binder composition comprising alkali phenol-formaldehyde resole resin solution and carbonifiable material capable of being hardened by reaction with organic ester. In another embodiment, the invention is a curing additive for a foundry binder comprising carbonifiable material and liquid ester such as gamma-butyrolactone, and the like. In another embodiment, the invention is a method of making a foundry mould wherein a mixture of sand, resin and carbonifiable material is shaped, and then hardened with a gaseous ester such as methyl formate.
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公开(公告)号：US4474904A
公开(公告)日：1984-10-02
申请号：US434462
申请日：1982-10-14
IPC分类号： B22C1/00 , B22C1/02 , B22C1/10 , B22C1/22 , C08G8/10 , C08G8/28 , C08K5/10 , C08L61/00 , C08L61/04 , C08L61/08 , C08L61/14 , C08K3/36
CPC分类号： B22C1/2253 , C08G8/10 , C08G8/28 , C08L61/14
摘要： A foundry moulding composition comprising(a) a granular refractory material,(b) from 0.25 to 2.5% based on the weight of the refractory material of an aqueous solution of a potassium alkali phenol-formaldehyde resin, said aqueous solution having a solids content of from 50 to 75% and said resin having a weight average molecular weight (M.sub.wr) of from 700 to 2000, a formaldehyde:phenol molar ratio of from 1.2:1 to 2.6:1 and a potassium hydroxide:phenol molar ratio of from 0.5:1 to 1.2:1;(c) from 0.05 to 3% based on the weight of said aqueous solution, of at least one silane, and(d) from 20 to 110% based on the weight of said aqueous solution of at least one ester active to catalyze curing of said resin.
摘要翻译： 一种铸造模制组合物，其包含（a）颗粒耐火材料，（b）基于钾碱性酚醛树脂的水溶液的耐火材料的重量为0.25至2.5％，所述水溶液的固体含量为 50〜75％，所述树脂的重均分子量（＆amp; Upbar＆Mwr）为700〜2000，甲醛：苯酚的摩尔比为1.2:1〜2.6:1，氢氧化钾：苯酚的摩尔比为0.5 ：1〜1.2：1; （c）基于所述水溶液的重量，0.05至3％的至少一种硅烷，和（d）基于所述至少一种酯催化固化的酯水溶液的重量的20至110％ 所说的树脂。
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