Quick Search
CAS NUMBER: 111-18-2
DESCRIPTION:
PU amine catalyst (Jeffcat DMDEE) is generally made by reacting a diisocyanate, such as toluene diisocyanate (TDI) or methylene diphenyl diisocyanate (MDI), and a blended polyol.
When a PU amine catalyst (Jeffcat DMDEE) is desired, the process uses additional chemicals, such as amine and/ or metallic salt catalysts, auxiliary blowing agents, and silicone surfactants, to achieve the desired properties.
PU amine catalysts (Jeffcat DMDEE) are used to control and/or balance both the gelling reaction and the gas-forming or foaming reaction responsible for foam formation.
Although several organometallic compounds or salts may be used as catalysts in the production of PU amine catalysts (Jeffcat DMDEE), many polyurethane manufacturers use either tertiary aliphatic amines or alkanolamines.
PU amine catalysts (Jeffcat DMDEE) are typically 0.1 to 5.0 percent of a polyurethane formulation.
PU amine catalysts (Jeffcat DMDEE) are produced by the reaction of polyol, polyisocyanate and water in the presence of catalysts and other auxiliary agents.
PU amine catalysts (Jeffcat DMDEE) play an important role not only in the control and balance between the gelling and blowing reactions, but also in the optimization of the foam properties and the curing speed during the foam formation.
PU amine catalysts (Jeffcat DMDEE) either alone or in combination with tin octoate are most widely used catalysts in the manufacture of polyurethane foams.
Depending on their chemical structure they speed up the reaction between the hydroxyl and the isocyanate groups, accelerate the blowing reaction between isocyanate and water resulting in formation of CO2, or when blocked with carboxylic acids show delayed activity after being deblocked at elevated temperatures.
PU amine catalysts (Jeffcat DMDEE) can accelerate the surface reaction speed and improve the surface properties of the finished goods by migrating to the foam mold surface.
Those containing hydroxyl groups will react with the isocyanate groups becoming bonded to the polyurethane polymer matrix, which renders zero-emission of PU amine catalyst (Jeffcat DMDEE) during the service life of the end product.
PU amine catalysts (Jeffcat DMDEE) are chemicals that reduce the energy of activation, allowing reactions to occur faster and at lower temperatures than otherwise possible.
PU amine catalysts (Jeffcat DMDEE) do not directly participate in the reaction, and remain unchanged in the system once the reaction is complete.
PU amine catalyst (Jeffcat DMDEE) systems can be divided into two broad classes: gelling catalysts and blowing catalysts.
Gelling PU amine catalysts (Jeffcat DMDEE) are more selective to catalyzing the reaction of the isocyanate with hydroxyl groups, whereas blowing catalysts are foaming catalysts.
Blowing PU amine catalysts (Jeffcat DMDEE) are more selective to catalyzing the reaction of the isocyanate with water to produce foam.
When formulating a PU amine catalyst (Jeffcat DMDEE), it is important to have the correct ratio of gelling and blowing catalysts.
If the ratio of gelling and PU amine catalysts (Jeffcat DMDEE) is incorrect, the foam will either lack physical integrity, or will be too dense.
Amines catalysts are amines of relatively low molecular weight (compared to other raw materials used for producing polyurethane polymers), some of which are also hydroxyl-containing.
PU amine catalysts (Jeffcat DMDEE) are available either as pure compounds, as blends with other catalysts, as dilutions with solvents (e.g. glycol, water, etc.), or partially or completely neutralised with organic acid.
PU amine catalysts (Jeffcat DMDEE) are used for producing polyurethane polymers, including flexible slabstock, high-resilience moulded, semi-flexible, integral skin, rigid moulded, rigid spray, packaging and one-component urethane foam systems.
Applications also include solid and microcellular elastomer systems, coatings and sealants.
In addition, amines are also used for closely related polyurethane reactions: biuret and allophanate reactions/trimerisation and polyurea forming.
PU amine catalysts (Jeffcat DMDEE) are highly important to the balance between the various reactions during the polyurethane foam formation.
PU amine catalyst (Jeffcat DMDEE) helps to reduce foam defects and can highly influence the physical characteristics and quality of the final foam.
PU amine catalysts (Jeffcat DMDEE) are versatile engineering materials which find a wide range of applications because their properties can be readily tailored by the type and composition of their components.
PU amine catalyst (Jeffcat DMDEE) plays a fundamental role in industrial chemical transformations.
PU amine catalysts (Jeffcat DMDEE) are used in wide range of polyurethane processing applications to produce polyether and polyester foams, coatings, elastomers, and high-modulus urethane plastics.
In light of growing concerns over amine emissions and worker exposure when processing with amines, as well as controlling volatile organic compound (VOC) levels in finished urethane products, chemical producers have continued to develop low emission, non-fugitive catalyst technologies.
PU amine catalyst (Jeffcat DMDEE) is one of the most important additives of polyurethane foam.
Different blow and gel balance is required for different foam system.
In the production of PU amine catalyst (Jeffcat DMDEE), catalysts play an important role.
PU amine catalysts (Jeffcat DMDEE) are generally made by reacting a diisocyanate, for example, toluene diisocyanate (TDI) or diphenylmethane diisocyanate (MDI), and a blended polyol.
PU amine catalysts (Jeffcat DMDEE), auxiliary blowing agents, and silicone surfactants also are used to produce a foam with the desired properties.
The principal ingredients are typically supplied in bulk to large volume users with storage tanks.
Other ingredients may be supplied in pails, drums, portable tanks, or returnable totes.
The ingredients are metered in the proper ratio through proportioning pumps to a mixing head or spray gun, where they are mixed and dispensed to produce a finished foam.
PU amine catalysts (Jeffcat DMDEE) are typically 0.1 to 5.0 percent of a polyurethane formulation.
PU amine catalysts (Jeffcat DMDEE) are a class of organic compounds derived from ammonia (NH3) by replacing one or more of the hydrogen atoms with alkyl groups or nonacidic radicals containing hydrogen and carbon atoms—e.g., dimethylcyclohexylamine [(CH3)2NC6H11].
PU amine catalyst (Jeffcat DMDEE) is primary, secondary, or tertiary depending on whether one, two, or three of the hydrogen atoms of ammonia are replaced.
PU amine catalysts (Jeffcat DMDEE) are basic and usually combine readily with acids to form salts.
Some PU amine catalyst (Jeffcat DMDEE) salts are useful as delayed-action catalysts.
PU amine catalyst (Jeffcat DMDEE) depends on its structure and basicity.
PHYSICAL AND CHEMICAL PROPERTIES:
-Density: 0.806
-Boiling point: 209-210ºC
-Melting point: -46ºC
-Flash point: 73ºC
-Refractive index: 1.435-1.437
SPECIFICATION:
-Appearance: Clear colorless liquid.
-Purity:≥99.0%
-Moisture Content: 0.5%
CHEMICAL COMPOSITION:
PU amine catalysts (Jeffcat DMDEE) are a class of organic compounds derived from ammonia (NH3) by substituting one or more of the hydrogen atoms with alkyl groups (carbon and hydrogen containing molecular chains)—e.g., dimethylcyclohexylamine [(CH3)2NC6H11].
PU amine catalyst (Jeffcat DMDEE) is primary, secondary, or tertiary depending on whether one, two, or three of the hydrogen atoms of ammonia are replaced.
Most PU amine catalysts (Jeffcat DMDEE) are basic and can combine readily with acids to form salts, some of which are useful as delayed-action catalysts.
PU amine catalysts (Jeffcat DMDEE) depends on their structure and basicity.
Because there are different types of PU amine catalysts (Jeffcat DMDEE), a detailed description of the physical and chemical properties of amine catalysts is beyond the scope of this document.
Like many organic materials, amine-containing compounds will burn when exposed to sufficient heat, a source of ignition, and oxygen.
This is especially true of vapors and mists, which are susceptible to sudden spontaneous combustion when mixed with air.
Generally, liquid PU amine catalysts (Jeffcat DMDEE) exhibit flash points in the range of 20°F to 115°F (-7°C to 46°C).
The flash points of mixtures or blended components may be altered in the presence of water or other components.
The combustion of tertiary PU amine catalysts (Jeffcat DMDEE) may yield a variety of toxic gases, including carbon monoxide, carbon dioxide, ammonia and nitrogen oxides.
REACTIVITY:
Generally, liquid PU amine catalysts (Jeffcat DMDEE) are corrosive and alkaline.
Avoid using copper and copper copper containing alloys such as brass or bronze with anime catalysts.
FIRST AID MEASURES:
-Eye contact:
PU amine catalysts (Jeffcat DMDEE) are alkaline in nature and their vapors are irritating to the eyes, even at low concentrations.
Exposed persons may experience excessive tearing, burning, conjunctivitis, and corneal swelling.
-Ingestion:
The oral toxicity of amine catalysts varies from moderately to very toxic.
For the 11 materials listed in Table 3, the acute oral LD50 (a calculated dose that would kill 50% of rats given that amount of the test material) varies from 272 to 2337 mg/kg.
SYNONYM:
N,N,N',N'-TetraMethyl-1,6-diaMinohexane
N,N,N‘,N‘-Tetramethyl-1,6-hexanediamine
1,6-Hexanediamine, N,N,N‘,N‘-tetramethyl-
N1,N1,N6,N6-Tetramethylhexane-1,6-diamine
N,N,N',N'-tetramethylhexane-1,6-diamine
1,6-Bis(dimethylamino)hexane
N,N,N',N'-Tetramethyl-1,6-hexanediamine
