What Is Two Methyl Two Amine?Dimethyl Thio-Toluene Diamine (DMTDA)
Dimethyl Thio-Toluene Diamine; DMTDA
Light Yellow Transparent Liquid
CAS No.: 106264-79-3
Molecular Weight: 214.34
Appearance: Light Yellow Transparent Liquid
Boiling Point: 200 ℃ (1.68 MmHg)
Refractive Index: 1.659
Flash Point: 163.4 ° C
Amine Value (MgKOH / G) 525-535
Color Value (Platinum-Cobalt-Method) ≤500
Dimethylthiotoluenediamine (2,4-Plus 2,6) Content% ≥96.0
Physical properties of products
Chinese name two methyl two amine, curing agent chain extending agent DMTDA
Thio-Toluene Diamine Dimethyl
Appearance: yellow to amber transparent liquid at room temperature.
Moisture content: less than 0.1%
Density: 1.206 (20 degrees C)
Boiling point: 200 c (1.68mmHg)
Viscosity: mPa 600-900 & S (25 C)
Vapor pressure (mmHg) maximum 0.01 (20 C)
Packing: net weight 200kg / galvanized iron drum (a small cabinet play supporting installation of 16 tons), 1000KG/IB barrels (a small cabinet installed 18 tons) or 23 tons isotank.
Two, product technical indicators
Test results of the detection index of the project enterprise
Appearance pale yellow transparent liquid light yellow transparent liquid
The chroma of platinum cobalt colorimetry is less than or equal to 500300
Two DMTDA two amine (2,4 - 2,6 -) content is more than 9697
A DMTDA two amine content% = 4 2.3
Two trimethyl amine content% sulfur based toluene is less than or equal to 1 0.2
The water is less than or equal to 0.1% 0.05
Amine value 525-535 529
Three, product use and product advantage
A novel polyurethane elastomer curing agent, of which there are two isoforms that 2,4 - and 2,6 - dimethyl sulfur based toluene diamine mixture (about 77~80/17~20), and usually use the MOCA compared to room temperature is low viscosity liquid, can be used in low temperature operation chemically using low equivalent.What Is Two Methyl Two Amine?Dimethyl Thio-Toluene Diamine (DMTDA)
Dimethyl sulfur based toluene diamine curing agent chain extending agent DMTDA is a model of elastic polyurethane curing crosslinking agent, equivalent to Ethancure 300 of which mainly compared two isomers that 2,4 - and 2,6 - dimethyl sulfur based toluene diamine mixture (about 77~80/17~20), and usually use the MOCA and room temperature is low viscosity liquid, can be used in low temperature operation chemically using low equivalent. DMTDA is a low toxicity and environmental protection type liquid diamine chain extender, mainly used for polyurethane elastomer, rim (reaction injection molding), SPUA (spray polyurea elastomer) and the adhesives. At the same time, it may be used as curing agent for epoxy resin, has been widely used in polyurethane rollers, medicine, stamping molding. In addition, it in cars, metal mine, textile, papermaking, printing have widely application.
Curing agent chain extending agent DMTDA cure rate is much slower than DETDA, can be mixed with DETDA in different proportions, to adjust the curing speed to meet different needs.
1, two a sulfur based toluene two amine -DMTDA hindered aromatic two amine, a sulfur based and methyl group of the role of resistance to its activity than TDA and DETDA low, it is with the pre polymer reaction rate than DETDA 5-9 times longer.
2, dimethyl sulfur based toluene diamine curing agent chain extending agent DMTDA activity than MOCA high. In low NOC content pre poly body using dimethyl sulfur based toluene diamine curing agent chain extending agent DMTDA curing pouring time than the MOCA short, for the production and operation of workers, improve production efficiency, more appropriate.
3, curing temperature can be reduced to room temperature (preheat temperature can be adjusted in the range of 25 degrees to 100 degrees)
4, the equivalent of 107 low (MOCA 133.5), the same amount of curing prepolymer with low consumption cost.
5, the synthesis of PU (polyurethane) and alkali resistant performance is better than that of MOCA curing products, better injection type elastic effect.
6, MOCA curing at high temperature will be a volatile matter, and DMTDA at room temperature is not a volatile matter of the carcinogenic substances, is internationally recognized as a chain of environmental protection chain (curing agent).
7, compared with the traditional curing agent Moca, dimethyl sulfur based toluene diamine -DMTDA has many advantages: is a liquid at room temperature, easy to use, can be cured at room temperature; the mechanical properties of the cured material with MOCA comparable compared with foreign similar products, physical and mechanical performance is basically the same, a lower price, product cost is reduced, so the product is an ideal substitute for the traditional curing agent.
Processing properties and application properties of four, two, two, amine curing agent:
Two methyl two amine -DMTDA is a low viscosity liquid at room temperature, it has good fluidity, so it provides flexibility for the blending of the pre polymer and the curing agent, so it has the following advantages:
1, good compatibility with other components;
2, in the content in the pre NCO% content is low, it needs to cure time shorter than the MOCA, which is more favorable to the operator.
3, the NCO% content in the pre polymer for a long time, due to the high reaction activity, it needs to be cured, a long time, which is particularly beneficial to the operator.
4, in the same NCO% content of the equivalent value of DMTDA (107) than MOCA (133.5) to be small, so it is less than the amount of MOCA.What Is Two Methyl Two Amine?Dimethyl Thio-Toluene Diamine (DMTDA)
Five, curing agent chain extension agent DMTDA two a sulfur based toluene two amines, foreign products, E300 ETHACUR, MOCA three product differentiation results:
Zero point nine seven
Zero point nine seven
Zero point nine five
Hardness / Shao A
T531 GB/ a 92
Tensile strength /kgcm-Z
Five hundred and forty
Four hundred and sixty
T528 GB/ a 92
100 stress /kgcm-Z
Six point three
T528 GB/ a 92
Tear strength /kNm-1
One hundred and five
One hundred and twenty
One hundred and fifteen
GB/T529-91 (right angle)
Seven hundred and fifty
T528 GB/ a 92
1, income dimethyl sulfur based toluene diamine curing chain extender DMTDA agent products at room temperature viscosity was significantly larger than that of the ETHACU RE300. Known in the fabrication of poly ammonia cool elastic body, whether is prepolymer method or semi pre polymerization method, prepolymer group has higher viscosity, two groups of mixed as similar viscosity are more likely to be evenly mixed; and general mixed to of two groups of insulation. Even if the room temperature mixing and solidifying, the viscosity of the product on the process does not have any impact, so relative viscosity larger on the application had no effect.What Is Two Methyl Two Amine?Dimethyl Thio-Toluene Diamine (DMTDA)
2, the appearance of the color than ETHACURE300 deep. This is the product of the shortcomings of the product in the poly ammonia cool light products in the application of very.
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