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Three component polyurethane binder system

A technology of adhesives and organic adhesives, applied in polyurea/polyurethane adhesives, non-polymer adhesive additives, adhesive types, etc.

Inactive Publication Date: 2018-01-23
ASK CHEM LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Emissions constituting significant pollution in the workplace which cannot be effectively captured by protective measures such as extractor fans
However, it appears that molds produced from binder systems such as those taught in the Torbus patent leave room for improved performance, especially when high relative humidity is encountered

Method used

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  • Three component polyurethane binder system

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Embodiment Construction

[0014] One solution to these mold performance problems was clearly found in an adhesive composition that uses a three-component approach to provide a polyurethane cold box (PUCB) adhesive system. In such a system, the Part I component includes the polyol base resin and a suitable set of supplements, the Part II component includes the polyisocyanate with a suitable set of supplements, and the Part III component includes the alkyl silicate Compounds such as tetraethyl orthosilicate (TEOS), alkyl silicate oligomers, and optionally aminosilanes.

[0015] TEOS, also known as tetraethoxysilane, is also identified by CAS registry number 78-10-4. Structurally, it has four ethyl groups attached to the oxygen atoms in the orthosilicate core. 99.999% pure TEOS is commercially available from Sigma-Aldrich and other sources.

[0016] Bipedalaminosilanes are characterized by the following general structure:

[0017] (R 1 O) 3 -Si-R 2 -NH-R 2 -Si-(OR 1 ) 3

[0018] where R 1 is an...

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Abstract

An organic binder system is mixed with molding material for sand casting in the metals industry. The organic binder system has three parts, the first two of which are conventional and are used in thecold box or no bake process. The third part, which is combined with the first two parts at the time of use, contains at least an alkyl silicate and, optionally, a bipodal aminosilane. In some embodiments, an amount of hydrofluoric acid is included in one or both of the first two parts. Use of the organic binder system provides improved tensile strength in the mold, especially in high relative humidity.

Description

[0001] Cross-citation of related applications [0002] This application is a non-provisional application of and claims priority to US Provisional Application 62 / 161598 filed May 14, 2015, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a three-part organic binder system for use in a cold box (low temperature test box, cold box) or a no-bake process (process, method, process), wherein two conventional binders combined at the time of use The precursor part is accompanied by a third part comprising an alkyl silicate and optionally a biposalaminosilane. Aspects of the invention also involve including an amount of hydrofluoric acid in one or both of the binder precursor portions. Background technique [0004] When producing molds and cores, polyurethane-based binder systems are used extensively, especially for the production of molds and cores for cold box or polyurethane no-bake processes. These systems requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/06C09J11/04C08G18/08C08G18/28C08G18/54C08G18/76
CPCB22C1/22C08G18/542C08G18/7671C08F290/147C08G18/0847C08G18/289C09J175/04B22C1/2273B22C3/00B22C9/02C08K5/5415C08G18/18C08K3/16C01B7/191C08G18/006C08L75/04C08L83/02
Inventor 王显平马克·斯坦克利夫克里斯蒂安·普里贝约尔格·克罗克尔
Owner ASK CHEM LLC
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