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Urethane-type curable organic binder for mold, and molding sand composition and mold obtained using same

一种有机粘结剂、聚氨酯的技术，应用在铸型、铸造成型设备、型芯等方向，能够解决可使用时间不充分、无法得到进一步的效果、阻碍胺系固化催化剂催化作用等问题，达到实现可使用时间的效果

Active Publication Date: 2014-12-17
ASAHI YUKIZAI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although the above-mentioned existing usable time extender has the effect of inhibiting the urethanization reaction and delaying the curing of the molding sand composition, even if it is added in excess of a certain amount, no further effect can be obtained. still not enough
In addition, the above potable time prolonging agent inhibits the catalytic action of the amine-based curing catalyst used to promote the above-mentioned urethanization reaction, causing uneven curing of the obtained casting mold and a decrease in the strength of the casting mold. holes, and in order to prevent such hardness unevenness and reduction in mold strength, there is also a problem that it is necessary to use a large amount of amine-based curing catalysts, etc.

Method used

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  • Urethane-type curable organic binder for mold, and molding sand composition and mold obtained using same
  • Urethane-type curable organic binder for mold, and molding sand composition and mold obtained using same
  • Urethane-type curable organic binder for mold, and molding sand composition and mold obtained using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] First, 0.2 parts by mass of N-(1,3-dimethylbutylidene)-3-(triethoxysilyl)-1-propylamine was added to 100 parts by mass of phenolic resin solution A, stirred, and This dissolves it. Next, 1000 parts by mass of Flattery silica sand containing N-(1,3-dimethyl Butylidene)-3-(triethoxysilyl)-1-propylamine 10 parts by mass of phenolic resin solution A and 10 parts by mass of polyisocyanate solution prepared in advance, then stirred and kneaded for 40 seconds to prepare Molding sand coated with an organic binder, that is, a molding sand composition.

[0069] Then, for the obtained molding sand composition, using a composition whose standby time after kneading was 0 minutes (immediately after kneading), 2 hours, or 4 hours, the strength of the mold was measured according to the above-mentioned test method, and the results were They are also shown in Table 1 below.

Embodiment 2～4

[0071] In the preparation of the molding sand composition of the above-mentioned Example 1, N-(1,3-dimethylbutylidene)-3-(triethoxysilyl)- Except for 1-propylamine, it carried out similarly to Example 1, and prepared the molding sand composition of each Example. Then, with regard to the obtained molding sand composition, the measurement of the strength of the mold was carried out using a composition whose standby time after kneading was 0 minutes (immediately after kneading), 2 hours, or 4 hours, and the results are shown together below. Describe Table 1.

Embodiment 5～8

[0073] In the preparation of the molding sand composition of the above-mentioned Example 1, N-(1,3-dimethylbutylidene)-3-(trimethoxysilyl)-1-propylamine was used instead of N-(1,3- Dimethylbutylidene)-3-(triethoxysilyl)-1-propanamine, except that, the molding sand composition was prepared in the same manner as in Examples 1 to 4, and for the obtained molding sand composition , using the composition whose standby time after kneading was 0 minutes (immediately after kneading), 2 hours, or 4 hours, the mold strength was measured, and the results are shown in Table 1 below.

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PUM

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Abstract

Provided are: an organic binder for a mold, said organic binder being capable of prolonging the pot life of a molding sand composition advantageously without accompanying uneven curing, a lowering in mold strength, or an increase in the amount of a catalyst used; a molding sand composition which is obtained using the organic binder and which exhibits a prolonged pot life; and a mold produced from the molding sand composition through gas hardening. A urethane-type curable organic binder which is for use in the production of a urethane-based mold and which comprises a polyol compound and a polyisocyanate compound and further contains an alkoxysilyl-containing ketimine compound represented by a prescribed general formula.

Description

technical field [0001] The present invention relates to a phenol polyurethane-based gas-curing mold used in sand casting or an organic binder for molds used in molding a self-setting mold, a molding sand composition and a mold obtained by using the same. Background technique [0002] Conventionally, as one of the representative organic molds used in sand casting, it is known to use phenolic resin as a polyol compound and a polyisocyanate compound as a binder, and utilize their polyaddition reaction (urethanization reaction). ) molded phenol polyurethane casting mold. In addition, widely known as the phenol-urethane molds are mass-production gas-curing molds produced by the amine cold box method that do not require heating during molding, and non-metal molds produced by the no-bake method at room temperature. No-bake mold for mass production. [0003] Specifically, the above-mentioned gas-cured casting mold based on the amine cold box method can generally be produced by mix...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/22C08G18/00C08G18/54
CPCC08G18/542B22C1/2273C08G18/289C08G18/7664C08G18/7671
Inventor 奥山贤一郎棚桥朋史
Owner ASAHI YUKIZAI KOGYO CO LTD
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