Continuous process for the production of powdered polyisocyanate

Details Continuous process for the production of powdered polyisocyanate Continuous process for the production of powdered polyisocyanate

Filed on

1989-04-28

Date issued

1990-07-10

Examiner

Welsh, Maurice J.

Patent Class

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

SubClass

Synthetic resins

SubSubClass

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

Other Related Categories

528 44, 528 45, 528 59, 528 85, 528902, C08G 1880

Type

Patent

Status

active

Patent number

049407503

Description

ABSTRACT:
The present invention is directed to a continuous process for the production of powdered polyisocyanate addition products in finely divided form which by simultaneously (a) mixing a polyisocyanate component, an isocyanate-reactive component and an inert organic medium containing a surfactant, wherein at least one of the components is insoluble in the inert organic medium, in a low shear stator-rotor dynamic mixer operating at speeds of about 300 to 8000 rpm, utilizing a mixing wattage of about 0.05 to 10.0 watts per cubic centimeter and having a mixing volume of at least about 0.1 liters and (b) reacting the polyisocyanate component with the isocyanate reactive-reactive component in the inert organic medium to form solid polyisocyanate addition products which can be separated from the inert organic medium to form a powder, the average residence time of the components and the inert organic medium in the dynamic mixer being about 3 to 300 seconds and the overall flow rate through the dynamic mixer being at least about 20 kg/h.
The present invention is also directed to the powdered polyisocyanate addition products produced by this process.

REFERENCES:
patent: 3787525 (1974-01-01), McGarr
patent: 3817886 (1974-01-01), McGarr
patent: 3917741 (1975-11-01), McGarr
patent: 3933759 (1976-01-01), Hoeschele
patent: 3963710 (1976-06-01), Aufdermarsh, Jr.
patent: 4680367 (1987-07-01), Kopp et al.

Affiliated with

Also associated with

Rating

Continuous process for the production of powdered polyisocyanate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Continuous process for the production of powdered polyisocyanate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process for the production of powdered polyisocyanate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1721394