Amine Catalyst

A-1 contains 70% bis(2-dimethylamino ethyl) ether, one of the most active urethane foam

amine catalysts known. As a matter of convenience, the pure amine ether has been diluted with 30 weight percent dipropylene glycol to facilitate metering and to permit the use of conventional quantities in foam formulations.

Properties	Specification
Specific Gravity (20/20℃) Viscosity (20℃, cP) Freezing Point Vapor Pressure, mm Hg	0.9022 4.1 Sets to glass below -80(-112℉) 0.01
Solubility in Water(20℃) Solubility in Benzene Refractive Index, nD(25℃)	Complete Complete 1.4346
Flash Point ℃[℉] Pensky-Martens Closed Cup Cleveland Open Cup	74[165] 77[170]

▶Catalytic Activity

The basic chemical reactions important in the polyether foaming process are the poly/isocyanate reaction and the water/isocyanate reaction. In the polyol/isocyanate (alcohol/isocyanate)reaction, catalyst A-1 give a specific rate constant thhat is about 10 percent higher than a similar blend of triethylenediamine, the next most active amine. In the water/isocyanate reaction, however, A-1 has a specific rate constant that is 50% greater than triethylenediamine, the next most active amine.

The strong catalytic effect of A-1 toward the water/isocyanate reaction facilitates the balancing of the catalysis of the polyol/isocyanate reaction by small variations in the stannous octoate level. This control is important in the production of commercial open-celled, split-free, flexible-urethane foam. The level of A-1 can be adjusted over a wide range to permit control of foam rise time without a sacrifice in tin operating range.