News Details
Functional coatings crosslinking agent
2017-4-5 11:06:26
Functional coatings crosslinking agent,Is becoming a hot spot of the future research and development. Versatility (with the crosslinking, toughening, flame retardant, and promote the function such as) crosslinking agent become people the pursuit of the ideal product.
Crosslinking reaction refers to two or more molecules (general linear molecule) as mutual couplet network structure of bonding more stable molecules (molecular size) reaction. This reaction make linear or mild branched chain type large molecules into a 3 d mesh structure, improving strength, heat resistance, abrasion resistance, solvent resistance, such as performance, can be used for foam or not foam products.
There are two major categories of size of polymer synthesis method. Start from the monomer synthesis. Such as ion exchange resin was synthesized with chain polymerization of 3 d mesh skeleton styrene and divinyl benzene copolymer, etc.; Second, the first synthetic linear or branched chain type of prepolymer and crosslinking reaction, crosslinking way can be chemical crosslinking can also be a physical crosslinking, such as rubber vulcanization, curing of unsaturated polyester chain polymerization reaction, the reaction of epoxy resin and curing agent, the leather tanning process (such as protein and formaldehyde) belong to the chemical crosslinking; Use of light, heat and radiation can also make a linear polymer, cross-linking, polyethylene radiation crosslinking is one example,
belong to the physical crosslinking. Linear polymer after moderate crosslinking, the mechanical strength, elasticity, dimensional stability, solvent resistance and chemical stability, etc, all have improved, so the crosslinking reaction is often used in the polymer modification.
Crosslinking reaction is widely used in polymer synthesis, such as plastic, resin, rubber, etc. In the process of the synthesis and modification.
When plastic monomer polycondensation, produce branched chain first, and then will pay couplet body structure. This kind of polycondensation process called shape polycondensation. Already crosslinking the size of the polymer insoluble, don't melt, dimension stability, cannot be molded. And linear or branched chain model, can melt plasticization, heated, potential functional groups further crosslinking curing, the polymer called thermosetting polymers.
Due to the particularity of crosslinking reaction, thermosetting polymer production - a divided into two phases: the first stage is made first polymerization incomplete prepolymer, prepolymer is usually linear or branched oligomer, the molecular weight of about 500 ~ 5000, can be a liquid or solid; The second stage is the molding curing prepolymer, prepolymer under heat and pressure conditions, there are still at the beginning of flow ability, can be full of cavity, after crosslinking reaction, namely into fixed shape products.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Alkyd resin, epoxy resin, acrylic resin and other manufacturing industrial paint and car paint, since the dry coating, paint is usually because the resin of linear molecules directly oxidization crosslinking reaction with oxygen in the air, dry film forming and fixed. Usually need to join a two-component coating, paint curing agent and make the thermosetting resin molding. Curing agent and can be referred to as crosslinking agent.
FAN developed such as silica and polyurethane (pu) blend was prepared waterborne polyurethane film method. On the surface of polyurethane dispersions by hydrolysis and condensation reaction to join four ethoxy silane or methyl triethoxy silane mixture of silica/polyurethane is prepared. The distribution of silica particles in polymer on the collective, and agglomerate silica can be avoided and the dispersion of Si - CH3 groups in situ modification.
The method of preparation of composite membrane showed good hardness and abrasion resistance, even if the silicon content in 2% ~ 3%, the performance is better than unmodified silica are excellent. SiO2 uniform dispersion in the polyurethane matrix, better compatibility with the SiO2 and organic part, improve the hardness of the film, thus improve the wear resistance, wear in leather, paper coating has a good application prospect.
FU such as use of the chemical bonds between polymer matrix and silica nanometer materials, the preparation of castor oil based silica hybrid waterborne polyurethane material. In the polyurethane matrix nanometer silicon dioxide particles to improve the hydrophobicity and thermal stability play an important role. The silicon content increases the roughness of the thin film thermal stability, hydrophobic, and strengthen, but the transparency of film in the 300-800 - nm area decreased.
This helps regulate the best silicon content in order to achieve the best stability and light transmittance. Huaming Yang invented a wood and poly (caprolactone siloxane methods for preparation of waterborne polyurethane coating with diisocyanate, hydroxyl silicone oil and poly (caprolactone generated - NCO pre polymers, and then use hydrophilic monomer, coupling agent, shrinkage diethylene glycol chain extension reaction, finally to adjust pH value to neutral, water mixing. High strength of coating, coating yellowing, and no harmful solvent evaporation.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Crosslinking reaction refers to two or more molecules (general linear molecule) as mutual couplet network structure of bonding more stable molecules (molecular size) reaction. This reaction make linear or mild branched chain type large molecules into a 3 d mesh structure, improving strength, heat resistance, abrasion resistance, solvent resistance, such as performance, can be used for foam or not foam products.
There are two major categories of size of polymer synthesis method. Start from the monomer synthesis. Such as ion exchange resin was synthesized with chain polymerization of 3 d mesh skeleton styrene and divinyl benzene copolymer, etc.; Second, the first synthetic linear or branched chain type of prepolymer and crosslinking reaction, crosslinking way can be chemical crosslinking can also be a physical crosslinking, such as rubber vulcanization, curing of unsaturated polyester chain polymerization reaction, the reaction of epoxy resin and curing agent, the leather tanning process (such as protein and formaldehyde) belong to the chemical crosslinking; Use of light, heat and radiation can also make a linear polymer, cross-linking, polyethylene radiation crosslinking is one example,
belong to the physical crosslinking. Linear polymer after moderate crosslinking, the mechanical strength, elasticity, dimensional stability, solvent resistance and chemical stability, etc, all have improved, so the crosslinking reaction is often used in the polymer modification.
Crosslinking reaction is widely used in polymer synthesis, such as plastic, resin, rubber, etc. In the process of the synthesis and modification.
When plastic monomer polycondensation, produce branched chain first, and then will pay couplet body structure. This kind of polycondensation process called shape polycondensation. Already crosslinking the size of the polymer insoluble, don't melt, dimension stability, cannot be molded. And linear or branched chain model, can melt plasticization, heated, potential functional groups further crosslinking curing, the polymer called thermosetting polymers.
Due to the particularity of crosslinking reaction, thermosetting polymer production - a divided into two phases: the first stage is made first polymerization incomplete prepolymer, prepolymer is usually linear or branched oligomer, the molecular weight of about 500 ~ 5000, can be a liquid or solid; The second stage is the molding curing prepolymer, prepolymer under heat and pressure conditions, there are still at the beginning of flow ability, can be full of cavity, after crosslinking reaction, namely into fixed shape products.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
Alkyd resin, epoxy resin, acrylic resin and other manufacturing industrial paint and car paint, since the dry coating, paint is usually because the resin of linear molecules directly oxidization crosslinking reaction with oxygen in the air, dry film forming and fixed. Usually need to join a two-component coating, paint curing agent and make the thermosetting resin molding. Curing agent and can be referred to as crosslinking agent.
FAN developed such as silica and polyurethane (pu) blend was prepared waterborne polyurethane film method. On the surface of polyurethane dispersions by hydrolysis and condensation reaction to join four ethoxy silane or methyl triethoxy silane mixture of silica/polyurethane is prepared. The distribution of silica particles in polymer on the collective, and agglomerate silica can be avoided and the dispersion of Si - CH3 groups in situ modification.
The method of preparation of composite membrane showed good hardness and abrasion resistance, even if the silicon content in 2% ~ 3%, the performance is better than unmodified silica are excellent. SiO2 uniform dispersion in the polyurethane matrix, better compatibility with the SiO2 and organic part, improve the hardness of the film, thus improve the wear resistance, wear in leather, paper coating has a good application prospect.
FU such as use of the chemical bonds between polymer matrix and silica nanometer materials, the preparation of castor oil based silica hybrid waterborne polyurethane material. In the polyurethane matrix nanometer silicon dioxide particles to improve the hydrophobicity and thermal stability play an important role. The silicon content increases the roughness of the thin film thermal stability, hydrophobic, and strengthen, but the transparency of film in the 300-800 - nm area decreased.
This helps regulate the best silicon content in order to achieve the best stability and light transmittance. Huaming Yang invented a wood and poly (caprolactone siloxane methods for preparation of waterborne polyurethane coating with diisocyanate, hydroxyl silicone oil and poly (caprolactone generated - NCO pre polymers, and then use hydrophilic monomer, coupling agent, shrinkage diethylene glycol chain extension reaction, finally to adjust pH value to neutral, water mixing. High strength of coating, coating yellowing, and no harmful solvent evaporation.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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