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Modification of Epoxy Resin -- 2023-08-29

By reacting phenyltrialkoxysilane with β- The hydrolysis polycondensation reaction of 3,4-epoxycyclohexyethyltrimethoxysilane (A186), or the hydrosilylation addition reaction of semi enclosed cage type tris (dimethylhydrosilyl) heptadimethylsilsesquioxane T7 3H with allyl glycidyl ether (AGE), etc., respectively, produced cage or semi enclosed cage type POSS (referred to as EP-POSS) with three epoxy groups in two structures, which were used for the modification of epoxy resins such as E51, Unde ...

Silane Coupling Agent and Modified Epoxy Resin/coating -- 2023-08-22

Silane coupling agent is a type of small molecule organic silicon compound with organic functional groups and 2-3 SiORs.It has good compatibility with epoxy resin and is easy to achieve homogeneous reaction between the two.Silane coupling agents can chemically bond (couple) with organic and inorganic materials through Si-OR, bonding multiple inorganic materials into organic resin coatings, thereby enhancing the reinforcement effect of the resin and improving the mechanical properties of the orga ...

Modification of Silicone Modified Epoxy Resin -- 2023-08-21

A series of organosilicon modified epoxy resins were successfully prepared using polymethyltriethoxysilane (PTS) through two methods: physical mixing and chemical copolymerization. Research has shown that chemically modified epoxy resin products have better performance than physically blended modified epoxy resin products.Therefore, the next focus of this article is to elaborate on the study of organic silicon chemical copolymerization modified epoxy resin.Chemical Copolymerization ModificationC ...

Research Progress in Silicone Modified Epoxy Resin -- 2023-08-18

Epoxy resin is a type of thermosetting resin that is based on aliphatic, alicyclic, or aromatic organic structures, containing two or more reactive epoxy functional groups, and can be crosslinked and cured under appropriate conditions and curing agents.Epoxy resin has been widely used in the fields of heavy-duty anti-corrosion coatings, adhesives, electronic sealing materials, and composite materials due to its strong adhesion, low shrinkage, and low cost.There are various types of epoxy resins, ...

Modification of Water-soluble Silicone Polyurethane -- 2023-08-17

Polydimethylsiloxane terminated with hydroxyethyloxypropyl with polyethylene glycol, 1,3-butanediol, MDI, in N-methyldiethanolamine or dimethylformamide (DMF) (or toluene) and I butanone (MEK), and then react with (EtO) heart (CH convex NCO) to obtain a hydrophilic polyurethane solution for coating and artificial leather.Using polyester silicon (polyester) polyol, organic low molecular weight, polyisonitroester, chain extender and hydrophilic chain extender as main raw materials, siloxane copoly ...

Preparation of Waterborne Polysiloxane Polyurethane -- 2023-08-16

The epoxy group of the siloxane reacts with the sulfonyl or sulfonyl quaternary salt in the water-based polyurethane, and the epoxy siloxane is grafted onto the polyurethane chain, and polyoxypropylene glycol (PPG), toluene diisocyanate Polyester (TOI) was used as the main raw material, Y-glycidoxypropyltrimethoxysilane (CKH-560) was used as silicone modifier, and MOCA was used as chain extender to prepare silicone-modified polyurethane elastomer. The experimental results show that the epoxy gro ...

Modification Method with Vinyl Coupling Agent -- 2023-08-15

Vinyl undergoes free radical polymerization under the action of an initiator, grafting siloxane onto the polyurethane chain for modification. A new type of organic silicone polyol with high cohesion was synthesized through solution polymerization using acrylic epoxy resin (AE) and vinyl trimethoxysilane (VTMS) as monomers. Ammonia based organic silane was reacted with polyurethane prepolymer to study the heat resistance of the modified polyurethane. The results showed that:, The heat resistance ...

Step-by-step Feeding Method for Waterborne Polyurethane -- 2023-08-14

The step-by-step feeding method can be further divided into two types: one is that after the reaction between isocyanate monomer and polyester is almost complete, organic siloxane is first added to expand the chain, and then CDMPA is added to introduce - COOH group; Another method is to introduce - COOH group with dithiomethylpropionic acid (DMPA) after the reaction between isocyanate monomer and polyester is almost complete, and then add organic siloxane to expand the chain.The load obtained fr ...

Addition of Organosilicon Modified Waterborne Polyurethane -- 2023-08-11

Due to the structure and properties similar to dendritic polymers, hyperbranched polymers have a large number of cavities, branching points, and a nearly spherical structure, and their preparation steps are simple without the need for purification. However, hyperbranched polymers and dendritic polymers cannot be directly used as materials due to the lack of molecular chain entanglement. Grafting linear polyurethane onto hyperbranched polymers not only endows them with certain mechanical properti ...

Modification of Waterborne Polyurethane Polymers -- 2023-08-10

The researchers used KH550 (3 aminopropylethoxysilane), HEA (2 hydroxyethyl acrylate), IPDI (isophorone diisoalate), PE0400 (polyethylene oxide 400) as raw materials to synthesize A high molecular polymer containing silicon in the side chain was discovered, and a material containing Si—(}—Si was produced after hydrolysis and condensation. It was first discovered that the material has good shape retention, and the effect of PU/PE ratio on shape retention and vitrification was studied. Effect of ...

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