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General introduction of silane coupling agent kh570
General introduction of silane coupling agent kh570
KH-570 silane coupling agent, γ-methacryloyloxypropyltrimethoxysilane is an organofunctional silane coupling agent for improving the glass fiber reinforced and inorganic filler containing thermosetting resin can improve their mechanical and electrical performance,
Particularly thermoplastic resin filled by reactive free radical reaction curing, such as unsaturated polyesters, polyurethanes and acrylates, including polyolefins and thermoplastic polyurethanes.
Features and uses
KH-570 silane coupling agent use:
(1) When the composite material is treated with a glass fiber treated with a polyester-compatible surface treatment agent, the strength of the composite material can be remarkably improved. Such a surface treatment agent usually includes a silane coupling agent, a film former, a lubricant And antistatic
.
(2) This product improves the dry and wet mechanical strength of polyester composites filled with white carbon black, glass, silicates and metal oxides.
(3) This product improves the wet electrical performance of many inorganic filler-filled composites. Such as cross-linked polyethylene and polyvinyl chloride.
(4) This product can be vinyl acetate and acrylate or methacrylate monomer copolymer can be crosslinked at room temperature curing. These silane-forming polymers are widely used in coatings, adhesives and sealants. Provides excellent adhesion
Relay and endurance.
Solubility:
Soluble in aromatic and alcohols, ketones and other aliphatic solvents, slightly soluble in water, but hydrolysis, hydrolyzate instability. product description:
Silane Coupling Agent KH-570 is a versatile epoxy silane with an epoxy functional group and three hydrolysable methoxy groups in the molecular structure. This dual reactivity allows them to react with inorganic material(
Glass, metal, filler) and organic polymers (thermosetting resins, plastics, elastomers) to improve the bonding, bonding and compatibility between the two, thereby improving the mechanical properties of resin-based composites
Improve the adhesive strength of resin coating and water resistance and other properties. In different applications, it can be used as coupling agent, adhesion promoter, curing agent, pigments and fillers surface modifier.
Silane coupling agent KH-570 is trimethoxysilane, its hydrolysis rate significantly faster than triethoxysilane, can provide faster reaction and curing speed, but the side reaction of the hydrolysis reaction is methanol, slightly less environmentally friendly .
Reaction characteristics:
In the presence of water, the alkoxy group of the silane coupling agent KH-570 is hydrolyzed to form a reactive silanol group, and at the same time, the hydrolysis reaction by-product methanol is released. This silanol group reacts with a variety of inorganic materials (substrates or pigments)
The surface of the hydroxyl group to form a chemical reaction of condensation, and its epoxy can be heated or acid, the base catalyst for epoxy ring-opening reaction with the appropriate polymer (containing primary amino, hydroxyl, carboxyl, ring Oxygen,
Acid anhydride, etc.) chemical reaction occurs, through the above-mentioned two-way reaction of the product to achieve the inorganic filler (or substrate) and organic polymer material between the coupling, connection.
Silane coupling agent KH-570 hydrolysis requires the use of organic acids (such as formic acid, acetic acid, etc.) as a catalyst, in particular, will adjust the water pH to about 4, then add silane stirring for a period of time (at least 15 minutes) Finish
All dissolved, clear and transparent solution. Its hydrolyzate unstable, it is recommended within 24 hours, the solution on the fog shows that the silane has been part of the self-polymerization of silane formed a polymer (silicone) and failure.
The inorganic materials suitable for this product include glass, glass fiber, glass wool, mineral wool, mica, quartz and other metal materials such as aluminum hydroxide, magnesium hydroxide, kaolin, talc, steel, zinc, aluminum and their oxidation thing
, But has little effect on fillers having no hydroxyl groups on the surfaces such as calcium carbonate, graphite, carbon black, barium sulfate and the like.
Suitable polymers for this product include but are not limited to resins such as phenolic, epoxy, urea, polyurethane, acrylic, polyester, silicone, polysulfide, PVAC and plastics such as nylon, PBT and PET.
Uses and effects:
1, silane coupling agent KH-570 is mainly used in unsaturated polyester and EPDM, polystyrene, ABS; can also be used in polyurethane, polybutadiene and peroxide crosslinked polyethylene. The main products are polyester reinforcement
, EPDM cables and so on. Silane coupling agent modified dihydrate gypsum powder as artificial marble filler not only can enhance the bending strength of the sheet, and can largely reduce the production cost of artificial marble.
2, glass fiber sizing agent treatment of glass fiber, the formula generally contains film-forming agent, lubricant, antistatic agent, coupling agent, water and other components, coupling agent concentration of 0.3% -0.6%.
3, silane coupling agent KH-570 for wire and cable, can significantly improve the mechanical properties and wet electrical performance. Treatment of clay-filled peroxide-crosslinked EPM or EPDM systems with silane coupling agent KH-570 improved the dissipation factor
And specific capacitive reactance. In the same amount, the effect of the silane coupling agent KH-570 was 2.5 times that of vinylsilane.
4, KH-570 as a coupling agent can improve the free radical curable resins such as polyester and inorganic surfaces, including glass fiber, clay, quartz, other silica materials such as adhesion, to improve the composite dry / wet resistance Bending strength
Degree, in particular wet strength can be increased by about 100%. This product enhances the dry and wet mechanical strength of polyester composites filled with white carbon black, glass, silicates and metal oxides. Such as cross-linked polyethylene and polyvinyl chloride.
5, silane coupling agent KH-570 available acrylic resin, polyester adhesive to improve the adhesion of inorganic materials, increase water resistance, lower curing temperature. It is used as an additive in mineral-reinforced polyester resins
An alkyl coupling agent can improve the properties of the composite material, just like a mineral-reinforced composite material treated with a silane. Silane coupling agent KH-570 can also increase the number of coatings (polyurethane, epoxy, phenolic resin, etc.) on the glass
And the adhesion of metal surface.
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