【International Sales Office】
Address:Room 2401,Tower B, Winner Plaza, No.100 Huangpudadao West Road, Tianhe District, Guangzhou,China
Tel:+86-020-38856806
Fax:+86-020-38856809
E-mail:feng@blueskychemical.com
【Chinese Company Headquarters】
Address:NO.8 Chemical Industry Park Economic Development Zone Xiantao,Hubei,China
Tel:+86-0728-3254088
Fax:+86-0728-3253808
E-mail:feng@blueskychemical.com
·POSITION:Products → Industry → Metal surface treatment → γ- Propyltrimethoxysilane (methacryloyloxy)
Product description
Structural formula:
Empirical formula:C10H20O5Si
Molecular weight:248.4
CAS No.:2530-85-0
Chemical name:γ-Methacryloxypropyltrimethoxysilane
Properties
LT-570 is a bifunctional silane possessing a methacrylic organofunctional group and a tri- mehoxysilyl inorganic group. The dual nature of its reactivity allows it to bind chemically to both inorganic materials (e.g. glass, silica) and organic thermoset resins thus functioning as adhesion promoter, co-monomer for polymer synthesis, crosslinker, and surface modifier.
The use of LT-570 as a coupling agent in glass fiber-reinforced or filler-modified plastics improves filler dispersibility while reducing the filler's sedimentation tendency. It also results in a major reduction in the melt viscosity of casting resins, as well as a marked improvement in the mechanical properties of glass-fiber-reinforced or mineral-filled plastics. In addition, use of LT-570 in these materials leads to a sizable increase in moisture (vapor) resistance as well as greater resistance to acids and bases. Used as a co-monomer in
polymers, LT570 produces binders that exhibit much improved wet scrub, abrasion and scratch resistance because of crosslinking and strong adhesion to the base. As a component of free-radical curable adhesives and sealants, it leads to improved mechanical properties and enhanced substrate adhesion.
LT570 is a clear, colorless, light and heat sensitive liquid with a characteristically sweet odor. It is soluble in alcohols, and aliphatic or aromatic hydrocarbons.
Technical data
Reactivity
LT570 is highly miscible with standard organic solvents, such as alcohols, toluene and acetone, but practically is insoluble in neutral water. However, by adjusting the pH to between 3 and 4 with a hydrolysis catalyst (e.g. acetic acid), an aqueous solution of up to 5 percent by weight can be obtained. The resulting clear solution should be used as soon as possible (within 1-2 days), before siloxane formation has proceeded too far. Deactivation of LT570 by siloxane formation is signalized by clouding of the aqueous solution.
The hydrolysis of alkoxy group produce methanol and reactive silanol (Si-OH) groups
which can bond to a variety of inorganic substrates. The methacrylate groups interact with the polymer. Examples of suitable inorganic substrates are glass, glass fibers, glass wool, mineral wool, silicic acid, quartz, sand, cristobalite, wollastonite, silicate fillers, metal oxides and metals. Examples of suitable polymers include unsaturated polyester, vinyl esters and acrylates.
Application and performance
LT-570 is used as adhesion promoter in application such as:
★A constituent of glass fiber sizes (glass fiber fillers for unsaturated polyester resins and polyolefins).
★A finish for glass fabrics used in unsaturated polyester resins.
★As a surface modifier for pigments and fillers for thermosets (unsaturated polyester, such as MMA), thermoplastics (such as polyesters and polyolefins) and elastomers.
★As an additive for filler, peroxide- crosslinked elastomers.
★As an additive for casting resins (un- saturated polyester, MMA).
LT570 is either applied to the inorganic substrate as a pretreatment by dipping, spraying, or coating or it may be added directly to the resin matrix (additive process). For pretreatment, the silane may be used
★Neat
★Dissolved in an organic solvent.
★Dissolved in a mixture of organic solvent and water for partial hydrolysis.
★Completely hydrolyzed in aqueous solution.
To prepare an aqueous pretreatment solution, approx. 1-5wt% LT-570 is dissolved in water that has been adjusted to pH 3-4 with acetic acid. The solution will turns clear when the
silane has fully hydrolyzed. The clear solution of LT-570 hydrolysate must be used within 1-2 days; if it turns cloudy again it may no longer be used. In the additive process, LT570 is mixed with the resin or polymer before or together with the filler. A prerequisite for this method is compatibility of the silane with the resin since the silane must not react prematurely with the resin.
When used correctly LT-570 can achieve the following properties, for example in a highly-filled unsaturated resin system:
★Optimum dispersion of the fillers/ pigments.
★Reduction in settling of the fillers/ pigments.
★A reduction in viscosity and improved flow properties of the resin.
★Improved mechanical properties of the molded products.
★Improved resistance of the molded products to boiling water, acids and alkalis.
LT-570 can be used as monomer during resin synthesis (e.g. latex dispersions). It may partially replace the methacryl-functional monomers (usually 0.5-3%, but sometimes up to 20%). The thus incorporated silane functionality can lead to improved properties in the final application (e.g. coating or sealant) of such resins:
★Wet adhesion strength.
★Chemical resistance.
★Mar resistance.
Product safety, handling and storage
Customers considering the use of this product
should review the latest Material Safety Data
Sheet and label for product safety information, handling instructions, personal protective equipment if necessary, and any special storage condition required. The “Best use before end” date of each batch is shown on the product label. Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.
Packaging
Information on available container sizes is obtainable from NEW BLUESKY supplier.
【International Sales Office】
Address:Room 2401,Tower B, Winner Plaza, No.100 Huangpudadao West Road, Tianhe District, Guangzhou,China
Tel:+86-020-38856806
Fax:+86-020-38856809
E-mail:feng@blueskychemical.com
【Headquarters & Plant】
Address:No.8 Development Avenue,New Materials Industrial Park,High tech Zone, Xiantao City, Hubei Province, China
Tel:+86-0728-3254088
Fax:+86-0728-3253808
E-mail:feng@blueskychemical.com
Copyright © 2023 HUBER NEWBLUESKY NEW MATERIAL LTD.
鄂ICP备05028071号
鄂公网安备 42900402000406号
湖北工商网监