Dimethylaminomethyl phenols

Catalysis is usually accompHshed through the use of tertiary amines such as triethylenediamine. Other catalysts such as 2,4,6-/m(/V,/V-dimethylaminomethyl)phenol are used in the presence of high levels of cmde MDI to promote trimerization of the isocyanate and thus form isocyanurate ring stmctures. These groups are more thermally stable than the urethane stmcture and hence are desirable for improved flammabiUty resistance (236). Some urethane content is desirable for improved physical properties such as abrasion resistance. 

Amongst the catalysts used or the polymerisation-trimerisation reactions are alkali metal phenolates, alcoholates and carboxylates and compounds containing o-(dimethylaminomethyl)phenol subgroups. Fluorocarbons such as trichloro-fluoromethanes are used as the sole blowing agents in the absence of any isocyanate-water reaction. 

Triscarbonato uranium(VI) solids, 25 432 Tris-Cp uranium complexes, 25 440 2,4,6-Tris(dimethylaminomethyl)phenol (TDMAMP), 10 412... 

Tris(dimethylaminomethyl)phenol, 3694 Tris(hydroxymethyl)methylamine, 1731 Urea, 0475... 

This compound has been described by Semenczuk [82], It was prepared by the nitration of 2,4,6-tri-(dimethylaminomethyl)-phenol (II) with nitric acid, s.g. 1.40,... 

Tris(dimethylaminomethyl)phenol, 3687 Tris(hydroxymethyl)methylamine, 1725 Urea, 0474... 

A stabilizing option of the functionalized and highly hygroscopic ligand 2,4,6-tris(dimethylaminomethyl)phenol was demonstrated by the isolation of the remarkable water adduct complex Pr[0C6H2(CH2NMe2)3-2,4,6]3(H20)2 according to the silylamide route [129]. 

A tertiary amine is often used as an accelerator in primary amine systems to correct for these problems and to adjust the rate of cure. Ortho-(dimethylaminomethyl) phenol, DMP-30, and tris-(dimethylaminomethyl) phenol, DMP-10, are common commercial tertiary amine accelerators. 

On the other hand, many studies on dynamic mechanical properties at temperatures lower than room temperatures have been reported 5,7 63,64). For example, a small (3 transition near —50 °C has also been observed in epoxy resins. Cuddihy 65,661 observed a (3 transition in resins cuted with different hardeners such as DETA, MPDA, HHPA, pyromellitic dianhydride (PMDA), and tris(dimethylaminomethyl)-phenol (DMP-30) (Fig. 19). The larger the size of the P transition, the higher the impact strength (Table 8). 

Two-Step Process. A mixture composed of 100 g of 4,4 -diphenylmethane diisocyanate and 1.1 g of l-phenyl-3-methyl-l-phospholene oxide is stirred for 3 minutes at room temperature. After carbon dioxide is evolved 4.0 g of 2,4,6-tris(dimethylaminomethyl) phenol is added into the reaction mixture. The mixture generates a reaction exotherm and expands to form a foamed product. After curing at 125°C for one hour, the resultant foam is colorless and posesses low friability. 

One-Step Process. Into 100 g of polymeric isocyanate, 0.8 g of 1-phenyl-3-methyl-l-phospholine oxide, 2.1 g of methanol and 2.1 g of 2,4,6-tris(dimethylaminomethyl) phenol are mixed and stirred for 15 sec. After 10 sec of mixing, foam rise starts, and the rise time is 60 sec. Low-friable foamed products result. 

Isocyanurate foams require such catalysts as potassium compounds—for example, potassium octoates, and amines such as 2, 4, 6-tris-(N, N-dimethylaminomethyl) phenol (22). 

Vanadium(IV) forms complexes with charged carboxylate, aryloxide and alkoxide functionalities as well as the neutral carbonyl group. The steric crowding of the /-butoxides allowed structural characterization of the tetraalkoxide (96) by gas-phase electron diffraction.475 Vw phenoxide complexes derived from ligands such as 2-(dimethylaminomethyl)phenol and 4-chloro-2-[(dimethylamino)methyl]phenol are active as ethylene and propylene copolymerization agents 476 Complexes with silanoxides have been prepared by the oxidation of Vnl complexes.477... 

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