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公开(公告)号：EP1074568A2
公开(公告)日：2001-02-07
申请号：EP00202724.1
申请日：2000-07-31
申请人： Cavenaghi SPA
发明人： Zennaro, Giorgio , Balconi, Massimo
CPC分类号： C08G18/0842 , B22C1/2273 , B22C1/24 , C08G18/542
摘要： Described herein are polyurethane systems to be used as binders in admixture with sand, or similar granular substances, for the production of moulds or cores for foundry use; in more detail, the invention relates to the polyisocyanate-based component that can be used in such binder compositions. Said component has the following percentage composition:
(a) a polyisocyanate in an amount of 50-95% by weight;
(b) vegetable oil in an amount of 5-40% by weight;
(c) an aprotic organic polar solvent in an amount of 2.5-30% by weight.摘要翻译： 这里描述的是聚氨酯体系用作与砂或类似的粒状物质混合的粘合剂用于生产用于铸造用途的模具或型芯; 更详细地说，本发明涉及可用于这种粘合剂组合物中的基于多异氰酸酯的组分。 所述组分具有以下百分比组成：（a）50-95重量％的多异氰酸酯; （b）5-40重量％的植物油; （c）2.5-30重量％的非质子传递有机极性溶剂。
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公开(公告)号：EP3225327A1
公开(公告)日：2017-10-04
申请号：EP17163617.8
申请日：2017-03-29
申请人： Cavenaghi SPA
CPC分类号： B22C1/188
摘要： The present invention relates to a powder composition that acts as an activator in foundry binder systems comprising an aqueous solution of sodium silicate.
The powder composition of the invention comprises sodium silicate having CAS Registry Number 1344-09-8 and a SiO 2 /Na 2 O molar ratio comprised between 3.0 and 3.6, preferably between 3.2 and 3.5, sodium aluminosilicate having CAS Registry Number 1344-00-9, and, optionally, additives.
The invention furthermore claims binder systems comprising the powder composition of the invention and aqueous solutions of sodium silicate, optionally comprising additives, the use of said binder systems for the production of foundry moulds, such as cores and/or moulds, and likewise the moulding material mixtures for the production of foundry cores and/or moulds comprising the binder systems of the invention and silica sand and/or other granular refractory material.
Furthermore, objects of the invention are a process for the production of said foundry cores and/or moulds, comprising a production step of the moulding material mixtures comprising the binder systems of the invention, together with silica sand and/or other granular refractory material, and a heating step of said moulding material mixtures, and the cores and/or moulds obtainable with said process.摘要翻译： 本发明涉及在包含硅酸钠水溶液的铸造粘合剂体系中充当活化剂的粉末组合物。 本发明的粉末组合物包含CAS登记号1344-09-8和SiO2 / Na2O摩尔比为3.0-3.6，优选3.2-3.5的硅酸钠，CAS注册号1344-00-9的硅铝酸钠和 ，任选地，添加剂。 本发明还要求保护粘合剂体系，其包含本发明的粉末组合物和硅酸钠的水溶液，任选地包含添加剂，所述粘合剂体系用于生产铸模（例如芯和/或模具）的用途，以及类似地模塑材料 用于生产包含本发明的粘合剂体系和硅砂和/或其他粒状耐火材料的铸造型芯和/或模具的混合物。 此外，本发明的目的是用于生产所述铸造型芯和/或模具的方法，其包括包含本发明的粘合剂体系的模塑材料混合物与硅砂和/或其它粒状耐火材料一起的制造步骤， 以及所述模塑材料混合物的加热步骤，以及所述方法可获得的芯和/或模具。
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4.发明公开
公开(公告)号：EP1531018A1
公开(公告)日：2005-05-18
申请号：EP04105709.2
申请日：2004-11-11
申请人： Cavenaghi SPA
发明人： ZENNARO, Giorgio
摘要： A description is given of an acid hardener which can be used in the preparation of furan resin-based foundry binder systems of the no-bake type having the following composition by weight:
a) water 10-50%
b) sulphuric acid 0.5-40%
c) aliphatic hydroxy acid 10-60%
d) arylsulphonic acid 0-20%
This hardener eliminates or in any case reduces the emissions of aromatic hydrocarbons and benzene in particular which usually occur during the use of conventional furan resin-based binders.摘要翻译： 给出了可用于制备具有以下重量组成的无烘焙型呋喃树脂基铸造粘合剂体系的酸性固化剂：a）水10-50％b）硫酸0.5-40 ％c）脂肪族羟基酸10-60％d）芳基磺酸0-20％该固化剂消除或在任何情况下减少芳族烃和苯的排放，特别是通常在使用常规呋喃树脂时会发生， 基于粘合剂。
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公开(公告)号：EP1531018B1
公开(公告)日：2009-04-15
申请号：EP04105709.2
申请日：2004-11-11
申请人： Cavenaghi SPA
发明人： ZENNARO, Giorgio
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公开(公告)号：EP1375028B1
公开(公告)日：2006-10-04
申请号：EP03076760.2
申请日：2003-06-06
申请人： Cavenaghi SPA
发明人： Zennaro, Giorgio
IPC分类号： B22C1/22
CPC分类号： B22C1/2273 , C08G18/283 , C08G18/3819
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公开(公告)号：EP3056296A1
公开(公告)日：2016-08-17
申请号：EP16154978.7
申请日：2016-02-10
申请人： Cavenaghi SPA
CPC分类号： B22C1/20
摘要： The present invention relates to synthetic resin-based systems, such as furan resins, to be used, in combination with suitable curing agents, as binders in mixtures with silica sand or other granular masses, for the production of foundry moulds and cores. In particular, one aim of the invention consists of the use of at least one alkyl ester of phosphorous acid and/or phosphoric acid and/or a salt thereof as an acidic catalyst for the manufacture of foundry binder mixtures, for example those of the 'no-bake' type. A further aim of the invention also consists of a mixture usable as a foundry binder, for example of the no-bake type, containing: a) monomeric furfuryl alcohol in quantities below 25% by weight of the mixture; b) formaldehyde in quantities no higher than 0.5% by weight of the mixture; c) at least one alkyl ester of phosphorous acid and/or phosphoric acid and/or a salt thereof.
摘要翻译： 本发明涉及与合适的固化剂结合使用的合成树脂系统，例如呋喃树脂，作为与硅砂或其它颗粒团的混合物的粘合剂，用于生产铸造模具和芯体。 特别地，本发明的一个目的是使用至少一种亚磷酸和/或磷酸的烷基酯和/或其盐作为酸性催化剂用于制造铸造粘合剂混合物，例如“ 不烘烤“类型。 本发明的另一个目的还包括可用作铸造粘合剂的混合物，例如无烘烤型，其包含：a）混合物的25重量％以下的单体糠醇; b）按混合物重量计不超过0.5％的甲醛; c）至少一种亚磷酸和/或磷酸的烷基酯和/或其盐。
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公开(公告)号：EP1375028A1
公开(公告)日：2004-01-02
申请号：EP03076760.2
申请日：2003-06-06
申请人： Cavenaghi SPA
发明人： Zennaro, Giorgio
IPC分类号： B22C1/22
CPC分类号： B22C1/2273 , C08G18/283 , C08G18/3819
摘要： A description is given of a polyurethane binder system for foundries, of the no-bake type, comprising an amine polyol-based component, a polyisocyanate-based component, and optionally a catalyst; the binder system in question is characterized in that the amine polyol-based component also contains a glycol monoether having the formula
R-[O-CH 2 -CH 2 ] n -OH
where R is an alkyl radical having from 1 to 12 carbon atoms, preferably from 1 to 6, or an aryl radical, and n is a number in the range from 1 to 6, or mixtures thereof.摘要翻译： 给出了一种无烘焙型铸造用聚氨酯粘合剂体系，其包含胺多元醇基组分，多异氰酸酯基组分和任选的催化剂; 所述粘合剂体系的特征在于，所述基于胺多元醇的组分还含有具有式R-O-CH 2 -CH 2 - n -OH的二醇单醚，其中R是具有1至12个碳原子的烷基，优选1至 6或芳基，n为1至6的数，或其混合物。
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公开(公告)号：EP1074568A3
公开(公告)日：2001-10-24
申请号：EP00202724.1
申请日：2000-07-31
申请人： Cavenaghi SPA
发明人： Zennaro, Giorgio , Balconi, Massimo
CPC分类号： C08G18/0842 , B22C1/2273 , B22C1/24 , C08G18/542
摘要： Described herein are polyurethane systems to be used as binders in admixture with sand, or similar granular substances, for the production of moulds or cores for foundry use; in more detail, the invention relates to the polyisocyanate-based component that can be used in such binder compositions. Said component has the following percentage composition: (a) a polyisocyanate in an amount of 50-95% by weight; (b) vegetable oil in an amount of 5-40% by weight; (c) an aprotic organic polar solvent in an amount of 2.5-30% by weight.
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公开(公告)号：EP3530685A1
公开(公告)日：2019-08-28
申请号：EP19156445.9
申请日：2016-04-21
申请人： Cavenaghi SPA
摘要： The object of the present invention is a method for the production of furan resins, useful for the preparation of binder systems comprising such resins in admixture with silica sand, or other granular substances, for the production of foundry cores and molds, or for the production of refractory bricks or refractory masses aimed to the metallurgical or glassmaking industry. The furan resins obtainable by the method of the invention are characterized by a low free formaldehyde content, which entails the advantage of reduced formaldehyde emissions under the conditions of use of the resins in the foundry.
Further objects of the present invention are, therefore, the furan resins obtainable by the method of the invention, their use in the production of foundry binder mixtures, preferably for no-bake foundry binder mixtures, the foundry binder mixtures comprising the furan resins obtainable by the method of the invention, the foundry binder systems comprising the foundry binder mixtures mentioned above, the foundry cores and/or molds comprising the foundry binder mixtures mentioned above, the process for the production of said foundry cores and/or molds and the foundry cores and/or molds obtainable by said process.
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