Amino-functional silane

Silane coupling agents may contribute hydrophilic properties to the interface, especially when amino functional silanes, such as epoxies and urethane silanes, are used as primers for reactive polymers. The primer may supply much more amine functionality than can possibly react with the resin at the interphase. Those amines that could not react are hydrophilic and, therefore, responsible for the poor water resistance of bonds. An effective way to use hydrophilic silanes is to blend them with hydrophobic silanes such as phenyltrimethoxysilane. Mixed siloxane primers also have an improved thermal stability, which is typical for aromatic silicones [42]. 

Acid-base properties can also be used to orient amino-functional silanes on glass surfaces with strong effects on performance of the coupling agent in... 

The primer chosen for this investigation consisted of an equimolar mixture of phenyl- and amino-functional silanes, suggested as a potential superior primer for aluminum/epoxy adhesive joints [7], The amino-functional silane is known to be effective as an adhesion promoter for fiber-reinforced composite materials [1, 2] as well as for epoxy/metal adhesive joints [8, 9] and provides for strong chemical interaction between the adhesive and primer, while the phenyl functional silane should reduce the overall concentration of polar, hydrophilic functional groups in the interphase region and at the same time maintain or improve the ability of the resin and primer to interpenetrate due to its structural similarity to the adhesive resin. 

Chem. Descrip. Amino-functional silane in methanol sol n. 

An example of a different reaction of an amino-functional silane with a modified polymer is the reaction of the amino groups with maleated polypropylene (PP) to form an imide (Scheme 4.4). This reaction is extensively used to couple treated glass fibers to polyolefins (see Chapter 7). 

Amino-functional silanes are widely used for the surface treatment of fillers such as wollastonite and calcined day. Commercial silanes are usually based on the primary... 

Amino functional silanes are fairly widely used. The commercial ones are usually based on the y-aminopropyl functionality. They have a wide versatility, being used in epoxies, phenolics, urethanes, polyamides, some thermoplastic polyesters and elastomers. 

Urethane sealants have good inherent adhesion to most substrates, but silane adhesion promoters are often used to improve this adhesion. Epoxy-, amino-, and mercapto-functional silanes are the most common because of their dual reactive nature. The silane end can react with surface hydroxyls the epoxy, amino, or mercapto end can react with the isocyanate. 

On the organic side of the interface, chemical bonds are formed between the organofunctional R group of the silane and the reactive species in the polymer matrix. For example, a methacrylate- or styryl-functional silane reacts with polyesters copolymerized with styrene or similar monomers, while amino- or chloroalkyl-functional silanes are unsuitable in this particular case. Polybutadiene... 

The compounds I and II represent intermediates for the synthesis of either carboxy functional or amino functional polysiloxanes. To this end I or II is either saponified with sodium hydroxide and concomitantly polycon-densated to a poly(carboxylaIky1 methyl siloxane) (III) or reduced to an amino alkyl methyl dialkoxy silane with sodium borohydride (J 5). ... 

The principal use of calcined clay in thermoplastics is in polyamide moulding compounds, for which purpose it is normally coated with an amino functional organo-silane. 

In 1989, Corriu and workers reported the thermal decomposition (85 °C) of the silyl formate 6, having a remote stabilizing amino group, which was prepared by the insertion reaction of the corresponding pentacoordinated functional silane 5 with CO2,... 

The noncovalent adsorption of proteins by p.CP is experimentally simple, but suffers from the disadvantage that the attachment can be reversible by rinsing the pattern with certain buffers and detergents or replacement by other proteins in solution. Moreover, the orientation of the deposited protein is not controlled. Delamarche et al. proposed the use of stamps modified with poly(ethylene oxide) silanes.100 The modification was conducted by oxidation of the PDMS stamp and reaction with APTES to yield an amino-functionalized surface. The next step was the reaction with homobifunctional cross-linker BS3 to bind surface amino groups with poly(ethylene glycol) (PEG) chains (Fig. 14.10). 

An amino-functional spacer arm is introduced at the 5 position of the ODN in the last step of its automated synthesis. ODN can be grafted via various functions available on flat carriers (such as flat silicon surfaces or wafers covered in silane) or on latex particles. Table 2 shows a list of various activation agents used and the reactive group resulting from the activation depending on the compound involved when available, the maximum grafting amount is also reported. 

The formulator or the chemist can choose among a large variety of functional silanes with the triethoxysilanol function on one end, the substituents at the other end (Y in Eqs. 1 and 2) can be alkyl, alkylene oxide, isocyanurate, mercapto, polysulfide, amino, ureido, epoxy, isocyanato, vinyl, or methacrylic groups. 

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