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公开(公告)号:US4051092A
公开(公告)日:1977-09-27
申请号:US733721
申请日:1976-10-26
申请人: Melville J. Holik , John F. Kraemer
发明人: Melville J. Holik , John F. Kraemer
CPC分类号: B22C1/2273 , C08K5/06
摘要: A new foundry core composition comprises foundry aggregate, a resin base such as an aqueous resole resin, a polyisocyanate, and a selected solvent therefor. The solvent is an acetal or ketal such as butyl acetal. The compositions are suitable for use in cold box, no-bake, and rapid no-bake processes.
摘要翻译: 新的铸造芯组合物包括铸造骨料,树脂基料如甲阶酚醛树脂水溶液,多异氰酸酯及其选择的溶剂。 溶剂是缩醛或缩酮,如丁缩醛。 该组合物适用于冷箱,无烘烤和快速无烘烤工艺。
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公开(公告)号:US4317896A
公开(公告)日:1982-03-02
申请号:US214828
申请日:1980-12-10
申请人: Melville J. Holik
发明人: Melville J. Holik
CPC分类号: C08L61/06 , B22C1/2273 , C08G18/542 , C08L61/14
摘要: A binder for foundry aggregate capable of being catalytically cured with a polyisocyanate and an alkaline catalyst comprising in combination, as a major portion, a butylated phenol-formaldehyde resin, a lesser amount of a resole resin and a still lesser amount of a novolac resin.
摘要翻译: 一种能够用多异氰酸酯和碱性催化剂进行催化固化的铸造骨料的粘结剂,其中主要组分为丁基化酚醛树脂,少量的甲阶酚醛树脂和更少量的酚醛清漆树脂。
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公开(公告)号:US4172068A
公开(公告)日:1979-10-23
申请号:US927700
申请日:1978-07-24
申请人: Melville J. Holik , John F. Kraemer
发明人: Melville J. Holik , John F. Kraemer
CPC分类号: B22C1/2273 , C08K5/06
摘要: A foundry core composition of foundry aggregate, a polyol component or mixture thereof, a polyisocyanate, and as a selected solvent therefor, an acetal or ketal such as butyl acetal. The compositions are suitable for use in cold box, no-bake, and rapid no-bake processes.
摘要翻译: 铸造组合物的铸造芯组合物,多元醇组分或其混合物,多异氰酸酯及其选择的溶剂,缩醛或缩酮如丁缩醛。 该组合物适用于冷箱,无烘烤和快速无烘烤过程。
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公开(公告)号:US4116916A
公开(公告)日:1978-09-26
申请号:US846250
申请日:1977-10-28
申请人: Melville J. Holik
发明人: Melville J. Holik
CPC分类号: B22C1/2253
摘要: A new foundry binder composition comprises a selected phenol-formaldehyde resin, a polyisocyanate, and a selected solvent therefor. A preferred solvent is ketal or an acetal such as butyl acetal. The resole is essentially anhydrous, should contain about 8% free phenol, and is further preferably characterized by the presence of substituent --(CH.sub.2 --O).sub.n --R groups replacing a phenolic hydrogen, R being a hydrocarbon radical such as butyl. Methylene and ether bridges linking phenolic nuclei are predominantly ortho-para with some para-para bridges. Also disclosed is the admixture of a reactive polyisocyanate and a solvent such as butyl acetal.
摘要翻译: 新的铸造粘合剂组合物包含选择的酚醛树脂,多异氰酸酯及其选择的溶剂。 优选的溶剂是缩酮或缩醛,例如丁缩醛。 甲阶酚醛基本上是无水的,应含有约8%的游离苯酚,并且进一步优选特征在于存在取代基 - (CH 2 -O)n -R基取代酚性氢,R为烃基如丁基。 连接酚醛核的亚甲基和醚桥主要是邻位对位和一些对位桥。 还公开了反应性多异氰酸酯和溶剂如丁缩醛的混合物。
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