Binder for casting and preparation method thereof
A binder and starch technology, which is applied in casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of low bonding strength, large gas generation, and difficulty in recycling, and achieve low cost, good collapsibility, and improved The effect of storage time
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0019] Embodiment 1: A kind of bonding agent for foundry, is characterized in that, is prepared from following components according to weight percentage:
[0020] 28 parts cornstarch
[0021] Formaldehyde 1.7 parts
[0022] Phosphoric acid 0.3 parts
[0023] 3 parts polyvinyl alcohol
[0024] Urea 2 parts
[0025] 65 parts of water.
[0026] A method for preparing a casting binder, comprising the steps of:
[0027] A, formaldehyde, phosphoric acid and water of above-mentioned proportion are mixed in reactor according to proportion;
[0028] B. Add urea and polyvinyl alcohol to dissolve evenly;
[0029] C. Finally, add starch, stir and heat up to 75°C, then continue to stir for 30 minutes to completely dissolve the starch. Detect the pH value of the solution and adjust it with 10% NaOH solution to make the solution neutral. Wherein, the polyvinyl alcohol in the above step B should be pre-prepared as a 10% aqueous solution for use.
Embodiment 2
[0030] Embodiment 2: A casting binder, characterized in that it is prepared from the following components according to weight percentage:
[0031] 32 parts potato starch
[0032] Formaldehyde 1.8 parts
[0033] Phosphoric acid 0.2 part
[0034] 2 parts polyvinyl alcohol
[0035] 4 parts urea
[0036] 60 parts of water.
[0037] The method for preparing above-mentioned foundry binder, comprises the steps:
[0038] A. Mix 1.8 parts of formaldehyde, 0.2 parts of phosphoric acid and 40 parts of water in the reactor according to the ratio;
[0039] B. Add urea and polyvinyl alcohol to dissolve evenly;
[0040] C. Finally, add starch, stir and heat up to 77°C, then continue to stir for 40 minutes to completely dissolve the starch. Detect the pH value of the solution and adjust it with 10% NaOH solution to make the solution neutral. Wherein, the polyvinyl alcohol in the above step B should be pre-prepared as a 10% aqueous solution for use.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com