Coupling classification

May 23, 2016

Press the coupling of the chemicalstructure and composition divided into organic chromium complexes, silanes,titanate and aluminate compounds into four categories:

Chromium complex conjugate

Chromium complex coupling agent developedin the early 1950s, by the chromium complexes of unsaturated organic acid andtrivalent chromium ions, the synthesis and application of technology than thosein mature and low cost, but the species is relatively simple.

A silane coupling agent

Silane coupling agent has the formulaRSiX3, R represents an amino group, a thiol group, a vinyl group, an epoxygroup, a cyano group and a methacryloyloxy group, etc. These groups anddifferent base resin had strong reactivity, X Representative hydrolyzablealkoxy (e.g. methoxy, ethoxy, etc.). Silane coupling agent in the countryKH550, KH560, KH570, KH792, DL602, DL171 these types of models.

Titanate coupling agent

Based on their unique molecular structure,titanate coupling agents include four basic types: ①single-alkoxy such coupling suitable for a variety of resin-based compositematerial system, especially for the non-free water, water containing onlychemical bonding or physical water filling system; ②pyrophosphate monoalkoxy type such coupling agents suitable for a variety ofresin-based composite material systems, particularly suitable for a highmoisture content filler system; ③ such coupling agents suitable for chelating a variety ofresin-based composite system, since they have a very good hydrolytic stability,especially suitable for this type of coupling agent is an aqueous polymersystem; ④ Coordination Body of such coupling agent in a variety ofresin-based composites or rubber-based systems have good coupling effect whichovercomes the titanate coupling agent is generally used in the resin-basedcomposite material system shortcomings.

Other coupling agents

Zirconium-based coupling agent is aninorganic aluminum-containing zirconium low molecular weight polymer. It cannot only promote the adhesion between the different materials, but also canimprove the performance of the composite material system, in particularrheological properties. Both of such coupling agents for a variety ofthermosetting resins, thermoplastic resins are suitable for many. There arealso magnesium and tin-based coupling agent coupling agent.

Reinforced plastic, the resin can beimproved and enhanced interfacial bonding chemicals.

At the interface between the resin matrixand reinforcing materials, or promote the establishment of a strong bindingsubstances.

Note: The coupling agent may be applied toreinforcing materials or added to the resin, or both to close.