News Details
New coating crosslinking agent
2017-8-19 11:04:52
New coating crosslinking agent
Film based on a new coating crosslinking agent with high flexibility and impact resistance, and the drying rate is low, but once the new coating after crosslinking agent added crosslinking, coating showed good resistance to water, is the ideal anti-corrosive primer. The commonly used coupling agent is epoxy resin and dimer fatty acid.
The use of these new coating crosslinking agent technology, make Ⅰ type epoxy coatings in aspects such as corrosion resistance, quick drying had the very big enhancement, has been used in metal anti-corrosion coatings.
Its Ⅱ type water-borne epoxy crosslinking agent for modification and Ⅰ waterborne epoxy crosslinking agent have similarities, early used solvent epoxy crosslinking agent such as crosslinking agent, polyamide, had tried to use the polyamide nonionic emulsifier emulsion dispersed in water, then had used modified polyamide as Ⅱ type water-borne epoxy crosslinking agent, it is the polyamide resin with acetic acid, phosphoric acid or hydrochloric acid ammonium salt reaction, then dissolved in ethanol solvent assisted in water.
The first commercial waterborne epoxy crosslinking agent is Casmide350 Ⅱ type, it is a mixture of modified polyamide resin and hydrophilic solvent solution. However, the coating properties obtained by using these crosslinking agents are not ideal.
Currently used Ⅱ type water-borne epoxy crosslinking agent is mainly used with hydrophilic segments of fatty amine polyoxyethylene chain or glycidyl ether epoxy resin or ethylene polyamine - amine epoxy crosslinking agent was response or reaction with dimer acid generated polyamide kind of crosslinking agent, it USES polyoxyethylene chain segment of hydrophilic that crosslinking agent can stable dispersion in water, and using epoxy resin as chain extender can improve the compatibility of crosslinking agent and epoxy resin.
Chinese name: Diethyl toluene diamine(DETDA)
Film based on a new coating crosslinking agent with high flexibility and impact resistance, and the drying rate is low, but once the new coating after crosslinking agent added crosslinking, coating showed good resistance to water, is the ideal anti-corrosive primer. The commonly used coupling agent is epoxy resin and dimer fatty acid.
The use of these new coating crosslinking agent technology, make Ⅰ type epoxy coatings in aspects such as corrosion resistance, quick drying had the very big enhancement, has been used in metal anti-corrosion coatings.
Its Ⅱ type water-borne epoxy crosslinking agent for modification and Ⅰ waterborne epoxy crosslinking agent have similarities, early used solvent epoxy crosslinking agent such as crosslinking agent, polyamide, had tried to use the polyamide nonionic emulsifier emulsion dispersed in water, then had used modified polyamide as Ⅱ type water-borne epoxy crosslinking agent, it is the polyamide resin with acetic acid, phosphoric acid or hydrochloric acid ammonium salt reaction, then dissolved in ethanol solvent assisted in water.
The first commercial waterborne epoxy crosslinking agent is Casmide350 Ⅱ type, it is a mixture of modified polyamide resin and hydrophilic solvent solution. However, the coating properties obtained by using these crosslinking agents are not ideal.
Currently used Ⅱ type water-borne epoxy crosslinking agent is mainly used with hydrophilic segments of fatty amine polyoxyethylene chain or glycidyl ether epoxy resin or ethylene polyamine - amine epoxy crosslinking agent was response or reaction with dimer acid generated polyamide kind of crosslinking agent, it USES polyoxyethylene chain segment of hydrophilic that crosslinking agent can stable dispersion in water, and using epoxy resin as chain extender can improve the compatibility of crosslinking agent and epoxy resin.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： 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).
As Klein with polyoxyethylene first two glycidyl ether with bisphenol A epoxy resin, epoxy resin synthesized you repose with polyethylene oxide with it propylene diamine and isophorone diamine reaction - amine epoxy crosslinking agent. Also useful bisphenol A epoxy resin, polyoxyethylene glycidyl ether and bisphenol A epoxy resin was prepared under the action of A catalyst dispersion, and then react with ethylene polyamine more amino epoxy amine adduct get end, with A single type epoxy compounds end namely get Ⅱ waterborne epoxy crosslinking agent.
There are also some Ⅱ waterborne epoxy crosslinking agent is one type of aromatic amine modified products. For example, Miyamoto et al., used to produce epoxy amine admixture under the action of NaOH and epoxy chloropropane, used as a water-based epoxy crosslinking agent with excellent performance. The product has been industrialized.
And modified alicyclic amine was used as waterborne epoxy crosslinking agent, as Stark of an alicyclic amine PACM (its structural formula for NH2 NH2) was modified, first the fat amine with end carboxyl polyether glycol reacts amide amine and epoxy resin reaction end epoxy compound crosslinking agent was finally with PACM reaction.
The two NCO groups of HDI have the same activity, which are prone to polymerization and generate deep polymer, which requires high production process. Excessive HDI monomer removal requires large investment, great difficulty and high cost.
As a result, this kind of crosslinking agent is generally used only as high grade raw materials in high-end coatings, aircraft coatings, automobile coatings, military field and solid rocket propellant and coating medium. IPDI isocyanate with fat ring structure, the synthesis of crosslinking agent coating drying speed, high hardness, good wear resistance and chemical resistance, but because of its high viscosity, not easy dispersed by polyol component, the coating and glossiness flowing property as crosslinking agent HDI. The polyurethane crosslinking agent synthesized by fatty isocyanate is superior in performance, but its price is more expensive.
The main raw material of aromatic isocyanate is toluene, the price of toluene is relatively low, and the prepared aromatic polyurethane has good mechanical properties. Liu Shenkai using MDI as raw materials, such as polymerization for floor coating was prepared by molten environmentally friendly polyurethane crosslinking agent, the crosslinking agent of low toxicity, quick drying, paint film toughness, impact resistance and good wear resistance, excellent comprehensive performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
As Klein with polyoxyethylene first two glycidyl ether with bisphenol A epoxy resin, epoxy resin synthesized you repose with polyethylene oxide with it propylene diamine and isophorone diamine reaction - amine epoxy crosslinking agent. Also useful bisphenol A epoxy resin, polyoxyethylene glycidyl ether and bisphenol A epoxy resin was prepared under the action of A catalyst dispersion, and then react with ethylene polyamine more amino epoxy amine adduct get end, with A single type epoxy compounds end namely get Ⅱ waterborne epoxy crosslinking agent.
There are also some Ⅱ waterborne epoxy crosslinking agent is one type of aromatic amine modified products. For example, Miyamoto et al., used to produce epoxy amine admixture under the action of NaOH and epoxy chloropropane, used as a water-based epoxy crosslinking agent with excellent performance. The product has been industrialized.
And modified alicyclic amine was used as waterborne epoxy crosslinking agent, as Stark of an alicyclic amine PACM (its structural formula for NH2 NH2) was modified, first the fat amine with end carboxyl polyether glycol reacts amide amine and epoxy resin reaction end epoxy compound crosslinking agent was finally with PACM reaction.
The two NCO groups of HDI have the same activity, which are prone to polymerization and generate deep polymer, which requires high production process. Excessive HDI monomer removal requires large investment, great difficulty and high cost.
As a result, this kind of crosslinking agent is generally used only as high grade raw materials in high-end coatings, aircraft coatings, automobile coatings, military field and solid rocket propellant and coating medium. IPDI isocyanate with fat ring structure, the synthesis of crosslinking agent coating drying speed, high hardness, good wear resistance and chemical resistance, but because of its high viscosity, not easy dispersed by polyol component, the coating and glossiness flowing property as crosslinking agent HDI. The polyurethane crosslinking agent synthesized by fatty isocyanate is superior in performance, but its price is more expensive.
The main raw material of aromatic isocyanate is toluene, the price of toluene is relatively low, and the prepared aromatic polyurethane has good mechanical properties. Liu Shenkai using MDI as raw materials, such as polymerization for floor coating was prepared by molten environmentally friendly polyurethane crosslinking agent, the crosslinking agent of low toxicity, quick drying, paint film toughness, impact resistance and good wear resistance, excellent comprehensive performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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