1. What is concrete release agent
Concrete release agent refers to a substance that is applied to the construction formwork before concrete is poured, so that it can The formwork will not stick to the concrete surface, be difficult to remove, or affect the smoothness of the concrete surface. Its main function is to form a film on the formwork and concrete surface to isolate the two, so it is also called an isolation agent.
2. What are the ingredients of concrete release agents
There are many types of concrete release agents. Different types of release agents have different ingredients. Generally, they mainly include the following. Types of systems:
1. Silicone system: dimethyl silicone oil, alkyl silicone oil, alkyl square silicone oil, hydrogenated silicone oil, hydroxyl silicone oil, amino silicone oil, methyl silicone resin, methylphenyl Silicone oil, silicone dispersion.
Features: Can be demoulded multiple times, resistant to high temperatures and wear-resistant.
2. Mineral oil, grease/wax/hydrocarbon solvent oil system: mineral oil, synthetic oil, paraffin wax, microcrystalline wax, polyethylene wax, oxidized polyethylene wax, modified polypropylene wax, palm Waxes, animal waxes, solvents, greases.
Features: Good paintability.
3. Fluorine system: fluorine-containing surfactants and fluorine-containing polymers.
Features: Good release and durability, no transfer.
4. Powder system: talc, mica, bentonite, boron nitride, diatomaceous earth, graphite, molybdenum disulfide quartz powder
Features: high temperature resistance, wear resistance and tensile resistance stretch.
5. Surfactant system: fatty acid soap (potassium soap, sodium soap, calcium soap, magnesium soap, zinc soap, etc.), polyether/polyester.
Features: Easy to clean.
6. Composite system: silicone + wax, silicone + fluorine system, surfactant + powder system.
Features: Good overall performance.
3. Comprehensive formula of concrete release agent
The formula of concrete release agent is the key to ensure its good effect. Here are some of them. Common concrete release agent formulas:
1. Polyurethane oil-based release agent formula
Emulsified wax liquid: 10% to 15%; methyl silicone oil Emulsion: 15% ~ 20%; modified silicone oil emulsion: 5% ~ 8%; deionized water: 50% ~ 55%; emulsifier: 4.5% ~ 6%; additives: 0.5% ~ 1%; preservative: 0.3 %~0.5%.
2. Water-based release agent formula
5 to 20 parts of paraffin, 5 to 8 parts of stearic acid, 5 to 10 parts of vegetable oil, 5 to 8 parts of co-emulsifier, calculated amount of potassium hydroxide, appropriate amount of other auxiliary materials, appropriate amount of ethyl paraben, deionized water to 100 share.
3. Polyurethane water-based release agent formula
Emulsified wax liquid: 10% ~ 15%; methyl silicone oil emulsion: 15% ~ 20%; Modified silicone oil emulsion: 5% to 8%; deionized water: 50% to 55%; emulsifier: 4.5% to 6%; additives: 0.5% to 1%; preservatives: 0.3% to 0.5%.
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