CN102416434A - Casting adhesive - Google Patents
Casting adhesive Download PDFInfo
- Publication number
- CN102416434A CN102416434A CN2011103829041A CN201110382904A CN102416434A CN 102416434 A CN102416434 A CN 102416434A CN 2011103829041 A CN2011103829041 A CN 2011103829041A CN 201110382904 A CN201110382904 A CN 201110382904A CN 102416434 A CN102416434 A CN 102416434A
- Authority
- CN
- China
- Prior art keywords
- adhesive
- percent
- foundry
- binder
- oxidant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000853 adhesive Substances 0.000 title claims abstract description 19
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 19
- 238000005266 casting Methods 0.000 title abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 20
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007800 oxidant agent Substances 0.000 claims abstract description 12
- -1 fatty acid ester Chemical class 0.000 claims abstract description 10
- 230000001590 oxidative effect Effects 0.000 claims abstract description 10
- 239000003822 epoxy resin Substances 0.000 claims abstract description 6
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 6
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical group COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 4
- 229930195729 fatty acid Natural products 0.000 claims abstract description 4
- 239000000194 fatty acid Substances 0.000 claims abstract description 4
- 239000000178 monomer Substances 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 125000005396 acrylic acid ester group Chemical group 0.000 description 2
- 150000002432 hydroperoxides Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007528 sand casting Methods 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to a casting adhesive, which comprises the following components in percentage by mass: (1) epoxy resin: 52 to 68 percent; (2) fatty acid ester: 2 to 14 percent; (3) alkyl silicate ester: 3 to 7 percent; (4) oxidizing agent: 15 to 25 percent; the foundry binder is cured in the presence of sulfur dioxide and an oxidizing agent; the foundry binder further comprises an ethylenically unsaturated monomer or polymer; the oxidant is cumene hydroperoxide. It has been found that the addition of alkyl silicate to this acrylate-free binder provides foundry shapes with enhanced hot strength as measured by corrosion resistance and hot tensile strength. The improvement in tensile strength studies allows the castings to use lower binder levels during core fabrication; since the adhesive is acrylate-free, all adhesive components can be solid and used in one package.
Description
Technical field
The present invention relates to material used in the casting field, especially relate to a kind of foundry binders of casting usefulness.
Background technology
The widely used cold-box process of casting industry being used for making core and pattern is " epoxy resin/acrylic acid ester system that sulfur dioxide solidifies ".In the method, hydroperoxides, epoxy resin, acrylic acid ester, typically the mixture of coupling agent and optional diluent is mixed into and gathers materials in (sand) and be pressed into specific formed body, is typically core or mold.The nitrogen of optional usefulness or the sulfur dioxide of other inert gas dilution are blown in the adhesive/formed body that gathers materials.This formed body hardens simultaneously and can be used for casting core/die system immediately; In this adhesive system; Acrylate component must keep separating with hydroperoxides, is applied on the sand up to adhesive, otherwise; The free radical polyalcohol of acrylate component is too early beginning, and makes adhesive become useless.
Summary of the invention
Technical problem to be solved by this invention provides a kind of foundry binders, and it can be because of the free radical polyalcohol of acrylate component with too early beginning, and makes adhesive become useless.
The present invention solves the technical scheme that its technical problem takes: a kind of foundry binders, and this adhesive comprises by mass ratio:
(1) epoxy resin: 52-68%;
(2) fatty acid ester: 2-14%;
(3) alkyl silicate: 3-7%;
(4) oxidant: 15-25%;
Said foundry binders solidifies in the presence of sulfur dioxide and oxidant.
Further described foundry binders also comprises ethylenically unsaturated monomers or polymer.
Further preferred version is that described oxidant is a cumene hydroperoxide.
The invention has the beneficial effects as follows: have been found that through corrosion-resistant and hot-stretch ionization meter, in the adhesive of this acrylate-free, add the calorific intensity that body has enhancing that is cast as that alkyl silicate provides.Improvement in hot strength research makes this mo(u)lding in ' N ' process, use lower binder levels; Because this adhesive is acrylate-free, all adhesive components all are can be solid-state and can in a packing, use.
The specific embodiment
A kind of foundry binders is characterized in that, this adhesive comprises by mass ratio:
(1) epoxy resin: 52-68%;
(2) fatty acid ester: 2-14%;
(3) alkyl silicate: 3-7%;
(4) oxidant: 15-25%;
Said foundry binders solidifies in the presence of sulfur dioxide and oxidant.
Described foundry binders also comprises ethylenically unsaturated monomers or polymer.
Described oxidant is a cumene hydroperoxide.
Through methods known in the art, dissimilar gathering materials is used to prepare cast mixture with the adhesive of different amounts.Use this adhesive and suitable gathering materials to prepare common formed body, hot investment casting formed body and fire-resistant formed body.The amount of used adhesive and the type of gathering materials are known to those skilled in the art.In ordinary sand casting; With the weight of gathering materials is benchmark; The amount of adhesive is not more than 10% of weight usually, and usually in the scope of the 0.5-7% of weight, more frequent; The weight of gathering materials with in the ordinary sand casting formed body is benchmark, and being used for the amount of binder that normal sands is cast as body is 0.6-5%.
Claims (3)
1. a foundry binders is characterized in that, this adhesive comprises by mass ratio:
(1) epoxy resin: 52-68%;
(2) fatty acid ester: 2-14%;
(3) alkyl silicate: 3-7%;
(4) oxidant: 15-25%;
Said foundry binders solidifies in the presence of sulfur dioxide and oxidant.
2. foundry binders according to claim 1 is characterized in that: described foundry binders also comprises ethylenically unsaturated monomers or polymer.
3. foundry binders according to claim 1 is characterized in that: described oxidant is a cumene hydroperoxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103829041A CN102416434A (en) | 2011-11-28 | 2011-11-28 | Casting adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103829041A CN102416434A (en) | 2011-11-28 | 2011-11-28 | Casting adhesive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102416434A true CN102416434A (en) | 2012-04-18 |
Family
ID=45941224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103829041A Pending CN102416434A (en) | 2011-11-28 | 2011-11-28 | Casting adhesive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102416434A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19727540A1 (en) * | 1996-09-17 | 1998-03-19 | Bakelite Ag | Epoxy resin binding agent for production of foundry moulds and cores |
| EP1057554A2 (en) * | 1999-06-01 | 2000-12-06 | Hüttenes-Albertus Chemische-Werke GmbH | Binder for producing foundry mould and core compositions |
| CN1852782A (en) * | 2003-07-25 | 2006-10-25 | 亚什兰许可和知识产权有限公司 | Acrylate-free binders containing an epoxy resin and an alkyl silicate |
| CN1308377C (en) * | 2002-02-14 | 2007-04-04 | 亚什兰许可和知识产权有限公司 | Free radically cured cold-box binders containing an alkyl silicate |
-
2011
- 2011-11-28 CN CN2011103829041A patent/CN102416434A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19727540A1 (en) * | 1996-09-17 | 1998-03-19 | Bakelite Ag | Epoxy resin binding agent for production of foundry moulds and cores |
| EP1057554A2 (en) * | 1999-06-01 | 2000-12-06 | Hüttenes-Albertus Chemische-Werke GmbH | Binder for producing foundry mould and core compositions |
| CN1308377C (en) * | 2002-02-14 | 2007-04-04 | 亚什兰许可和知识产权有限公司 | Free radically cured cold-box binders containing an alkyl silicate |
| CN1852782A (en) * | 2003-07-25 | 2006-10-25 | 亚什兰许可和知识产权有限公司 | Acrylate-free binders containing an epoxy resin and an alkyl silicate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120418 |