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Water-Based Curing Agents: Waterborne Epoxy Coatings Important Partner Dimethylthiotoluenediamine|Curing Agent Chain Extender DMTDA

Unique Performance, Environmentally Friendly Water-Based Epoxy Resin Convincing More And More People'S Attention. But In Addition To The Preparation Of An Aqueous Epoxy Paint As A Base Epoxy Resin, Waterborne Epoxy Curing Agent Also Plays An Important Role In The Industry As Waterborne Epoxy Coatings "Important Partner." Water-Based Curing Agents: Waterborne Epoxy Coatings Important Partner Dimethylthiotoluenediamine | Curing Agent Chain Extender DMTDA

Waterborne Epoxy Resin Refers To An Epoxy Resin In The Form Of Particles Or Droplets Dispersed In Water As The Continuous Phase Of The Dispersion Medium And Deserve A Stable Dispersion. Since The Epoxy Resin Is A Thermosetting Resin, Linear Structure, It Must Be Added Before The Construction Of Waterborne Epoxy Curing Agents, Chemical Cross-Linking Reaction Occurs At Room Temperature, Epoxy Curing After Changing The Original Soluble Fusible Nature Becomes Into Insoluble And Infusible Spatial Network Structure, It Exhibits Excellent Properties. According To The China Association Of Epoxy Resin Industry Experts, Water-Based Epoxy Coating Curing At Room Temperature Is Generally Used In The Case. Polyethylene Polyamines Such As Diethylene Triamine, Triethylenetetramine And M-Phenylenediamine Is A Commonly Used Solvent-Based Epoxy Curing Agents, But They Are Generally Soluble In Water, The Larger The Temperature Is Low Due To Humidity Or Air Such Curing Agents Absorb Moisture From The Air, Carbon Dioxide And Makes The Film White, Decreased Adhesion. And Polyethylene Polyamine Itself Likely To Be Volatile, And Has A Pungent Odor, Compatibility With The Epoxy Resin Is Also Poor, After The Film Will Be Part Of Polyethylene Polyamine Coating Surface Defects Caused By Precipitation. Waterborne Epoxy Curing Agent Actually Used Most Of Their Modified Products, Including Amidated Polyamines, Polyamides And Epoxy - Polyamine Adduct, Through The Introduction Of A Non-Polar Polyethylene Polyamine Group In The Molecule, Improved Their Compatibility With The Epoxy Resin.

Early Amidated Polyamines Waterborne Epoxy Coatings Used As The Curing Agent, Since The Amidated Polyamine Having The Function Of An Emulsifier, And Therefore Does Not Require A Low Molecular Weight Liquid Epoxy Pre-Emulsion, And The Amidated Polyamine Construction Before The Mixed Emulsion, Having Good Workability, Long Pot Life, Etc., But The Poor Performance Of The Coating After Curing, Poor Water Resistance And Chemical Resistance. Because Of Shortcomings Amidated Polyamines And Polyamide Curing Agent, The Modified Coating Performance And No Significant Improvement, So The Current Study Mainly Refers To Waterborne Epoxy Curing Agent Of Epoxy - Polyamine Adduct. By Polyethylene Polyamines Modified, Making It A Good Performance Waterborne Epoxy Curing Agent, To Ensure That The Film Properties Of The Cured Epoxy Coating Nearly Solvent. China Epoxy Resin Industry Association Experts Modified The Method Summarized As Four Kinds. Water-Based Curing Agents: Waterborne Epoxy Coatings Important Partner Dimethylthiotoluenediamine | Curing Agent Chain Extender DMTDA

Dimethylthiotoluenediamine Chinese Name Dimethylthiotoluenediamine, A Curing Agent DMTDA Chain ExtenderEnglish Name: Dimethyl Thio-Toluene DiamineAppearance: Yellow To Amber At Room Temperature Transparent Liquid

Content: "99%

Water Content: ≤0.1%

Density: 1.206 (20 ℃)

Boiling Point: 200 ℃ (1.68mmHg)

Viscosity: 600-900 MPa · S (25 ℃)

Vapor Pressure (MmHg) Maximum 0.01 (20 ℃)

Packing: Net Weight 200KG / Galvanized Iron (A Small Cabinet A Child Care Means 16 Tons), 1000KG / IB Barrel (A Small Container Loaded 18 Tons) Or 23 Tons ISOTANK.


A Novel Polyurethane Elastomers Cure The Crosslinking Agent, Wherein A Mixture Of Mainly 2,6-Dimethylthiotoluenediamine I.E. The Two Isomers, And 2,4 (Ratio Of About 77 ~ 80/17 ~ 20 ), Compared With MOCA Commonly Used At Room Temperature Is Low Viscosity Liquid Can Be Applied To The Construction Operation At Low Temperatures, The Use Of Chemical Equivalents Low.

Dimethylthiotoluenediamine - Hardener DMTDA Chain Extender Is A Novel Crosslinking Agent Cured Polyurethane Elastomer, Which Is Equivalent To Ethancure 300 There Are Two Isomers I.E., 2,4- And 2,6-Bis Methylthio Tolylenediamine Mixture (Ratio Is About 77 To 80/17 To 20), Compared With The Use Of MOCA Typically, Lower Viscosity At Room Temperature Is Liquid, Can Be Applied To Operate At Low Temperature, The Chemical Equivalent Of Using Low Advantage. DMTDA Is An Environmentally Friendly Low Toxicity Liquid Type Diamine Chain Extenders, Mainly For Polyurethane Elastomers, RIM (Reaction Injection Molding), SPUA (Spray Polyurea Elastomer) And Adhesives; Also Be Used As Epoxy Curing Agent, Has Been Widely Used In Polyurethane Rubber Roller, Medical, Stamping, Etc., In Addition It Has Widely Used In Automotive, Metal Mining, Textile, Paper And Printing Industry.

Curing Agent Chain Extender DMTDA Curing Speed Much Slower Than DETDA Can Be Mixed In Different Proportions With DETDA Used To Adjust The Curing Speed To Meet Different Needs.

1, Dimethylthiotoluenediamine -DMTDA Sterically Hindered Aromatic Diamine, Methylthio And Steric Hindrance Of The Methyl Group Makes Its Activity Is Lower Than TDA And DETDA, It And Prepolymer Reaction Rate Than DETDA Extended 5 -9 Times.
2, Dimethylthiotoluenediamine - Hardener DMTDA Chain Extender MOCA Higher Activity Than Using Dimethylthiotoluenediamine Prepolymer At Low Content NOC In - The Curing Agent Is Cured With DMTDA Chain Extender Pouring Time MOCA Shorter Than For Production Workers To Operate And Improve Production Efficiency Is More Appropriate.
3, The Curing Temperature Can Be Lowered To Room Temperature (Preheating Temperature May Range From 25 Degrees To 100 Degrees Adjustment)
4, Low Equivalent Weight Of 107 (MOCA 133.5), The Amount Of The Prepolymer Cured With Low Consumption Cost Reduction.
5, Synthetic PU (Polyurethane) Performance And Alkali Resistance Than MOCA Cured Product, An Injectable Elastomer Better.
6, The High Temperature Will Be Required When MOCA Curing Volatile Carcinogen, While DMTDA In Use At Room Temperature Is Not Volatile Carcinogen, Is An Internationally Recognized Environment-Friendly Chain Extender (Curing Agent).
7, Compared With The Traditional Curing Agent MOCA, Dimethylthiotoluenediamine -DMTDA Has Many Advantages: A Liquid At Room Temperature, Easy To Use, Can Be Cured At Room Temperature; The Mechanical Properties Of The Cured With MOCA Comparable Compared With Similar Foreign Products , Basically The Same Physical And Mechanical Properties, Lower Prices, Reduce Product Costs, So This Product Is An Ideal Substitute For Traditional Curing Agent.

One Is To Increase Compatibility. I.E. The Curing Agent To Improve Compatibility With The Epoxy Resin, An Epoxy Resin Which Is Conducive To The Stability Of The Emulsion After Dispersion After Curing And Avoid Surface Defects Caused Due To The Precipitation Of Curing Agent To Improve Compatibility With The Way Monocyclic Oxy Compound Or An Epoxy Compound. Typical Aromatic Monoepoxy Compound Is Phenyl Or Tolyl Glycidoxy Ethers, Typically Aliphatic Monoepoxide Compound Is A Glycidoxy Butyl Ether, Aromatic Polyepoxides Typically A Bisphenol A Type Epoxy Resin, Bisphenol F Type Epoxy Resins And Phenolic Epoxy Resins.

The Second Is To Maintain Multi-Functional. If By Waterborne Epoxy Curing Agent Before The Construction Of The Liquid Epoxy Resin Mixed Emulsion, Such Curing Agent Must Be Both A Crosslinking Agent And An Emulsifying Agent, Thus Modified Polyamine - Epoxy Adduct Proper Surface The Role Of The Active Agent. Specific Modified Polyamine Pathway Is - Introduced Into The Molecule Of A Segment Having Surface Activity Epoxy Adduct Molecular Chain, The Role Of This Part Of The Segment In The System From The Emulsifier.

Third, Extend The Applicable Period. To Extend Pot Waterborne Epoxy Resin Coatings Often Necessary To Reduce The Activity Of Waterborne Epoxy Curing Agent. Polyethylene Polyamine Molecule Comprises A Primary Amine And A Secondary Amine Hydrogen Hydrogen, Hydrogen And A Primary Amine Reactive Than The Secondary Amine Hydrogen Is Much Higher, The Blocking Agent By Primary Amine Hydrogen Reduces The Polyamine Is Reacted - The Activity Of The Epoxy Curing Agent Effective Way. Capping Agent Usually Monoepoxides, Such As Butyl Epoxy Propyl Ether, Propylene Propyl Ether, Phenyl And Tolyl Epoxy Propyl Ether. China Epoxy Resin Industry Association Experts Said, Quality Polyethylene Polyamide Epoxy Resin (Epoxy Angle But Compatibility Considerations, The Use Of Aliphatic Mono Epoxy Compound And An Aromatic Monoepoxide With The Use Of More Appropriate.

Fourth, With The Water Dispersible. Maintain Good Water Dispersible Very Important, Polyethylene Polyamine Is Water-Soluble, But With The Addition Of Epoxy Resin Hydrophilicity Decreased, And Therefore Must Be Considered When Synthetic Hydrophilic-Lipophilic Balance, It Modified After Polyamine - Epoxy Curing Agents Still Have Good Water Dispersibility. Generally Use A Salt Thereof, On The One Hand And A Portion Of The Primary Amine Hydrogen, But Also On The Other Hand Suitably Increase Its Hydrophilicity. Usually Use Organic Volatile One Yuan Weak Acid Such As Acetic Acid, It Evaporates After Curing The Basic Does Not Affect The Coating Corrosion Resistance And Chemical Resistance. Water-Based Curing Agents: Waterborne Epoxy Coatings Important Partner Dimethylthiotoluenediamine | Curing Agent Chain Extender DMTDA

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