Process for the production of isocyanate polyaddition products

Details Process for the production of isocyanate polyaddition products Process for the production of isocyanate polyaddition products

1981-04-02

1986-06-17

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 459, 264 39, 264176R, 264211, 264DIG69, 264DIG77, 521160, 521170, 521917, 528 67, 528 71, 528 85, C08G 1814

Patent

active

045957096

ABSTRACT:
Polyaddition products containing urethane groups are produced by reacting an isocyanate group containing distillation residue with a compound having a molecular weight less than 600 containing at least two alcoholic hydroxyl groups. The distillation residue is obtained in the commercial production of tolylene diisocyanate. The distillation residue and hydroxyl compound are reacted in amounts such that the NCO/OH equivalent ratio is less than 1.5:1. The polyaddition reaction is carried out at a temperature in the range of 50.degree. to 220.degree. C. The reaction is carried out in a reaction screw extruder preferably having self-cleaning screw geometry. The polyaddition products are useful as molding compositions, reactive fillers and starting materials in the production of flame-resistant polyurethane plastics.

REFERENCES:
patent: 3180852 (1965-04-01), Pfirschke et al.
patent: 3897314 (1975-07-01), Liebsch et al.
patent: 4143008 (1979-03-01), Zwolinski et al.
patent: 4251638 (1981-02-01), Reischl
Mo-1996-CIP Specification, pages 1 thru 35a and Abstract of the Disclosure, Ser. No. 169,589, filed 10-27-81.

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