Toluene diisocyanate residue-based compositions and the use of s

Details Toluene diisocyanate residue-based compositions and the use of s Toluene diisocyanate residue-based compositions and the use of s

1996-12-27

1998-09-08

Sergent, Rabon

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

25218224, 25218227, 25218228, 524196, 524198, 524199, 524366, 524377, 524762, 524773, 525452, 525453, 525454, 525457, 525458, 525460, 528 49, 528 59, 528 67, 528 76, 528 77, 528 80, 528 81, 528 85, 560 24, 560 25, 560 26, 560330, 560336, 560360, C08K 5205, C07C26902, C07C27128, C08G 1848, C08G 1840, C08G 1842

Patent

active

058046488

ABSTRACT:
A TDI residue generated from the phosgenation of toluene diamine having an ortho-isomer content of less than 0.5% is used to produce a urethane-filled hydroxyl compound. The TDI residues useful in this invention must contain at least 10% monomeric TDI and have a total NCO content of at least 20%. These TDI residues are reacted with a monofunctional alcohol in an amount such that the equivalent ratio of isocyanate groups to hydroxyl groups is from about 0.9:1 to about 1:0.9. The resultant composition may then be dissolved in a polyhydroxyl compound to produce a urethane-filled polyhydroxyl compound. This urethane-filled polyhydroxyl compound may then be reacted with a polyisocyanate to produce a polyurethane.

REFERENCES:
patent: 2884362 (1959-04-01), Bloom et al.
patent: 4293456 (1981-10-01), Reischl
patent: 4297456 (1981-10-01), Reischl et al.
patent: 4480081 (1984-10-01), Rosin et al.
patent: 4507464 (1985-03-01), Rasshofer
patent: 5216042 (1993-06-01), Daussin et al.
patent: 5290818 (1994-03-01), Nafziger et al.

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