Process for dispersing carbon black in polyethylene

Details Process for dispersing carbon black in polyethylene Process for dispersing carbon black in polyethylene

1980-05-09

1983-01-18

Bleutge, John C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524536, 524496, B29B 104, C08K 304, C08J 322

Patent

active

043692672

ABSTRACT:
A process for dispersing fine particle size carbon blacks in low density polyethylene whereby an initially prepared carbon black--low density polyethylene masterbatch, consisting of from 20-50 percent by weight carbon black, is let-down by intensive mixing, in a dry blended mixture of low density polyethylene and high density polyethylene, or propylene polymer, to form an intermediate masterbatch, which is further let-down in low density polyethylene by a second intensive mixing stage. The proportions of each component are chosen to yield a final product consisting of (on a weight basis) from 1-5% carbon black, 1-10% high density polyethylene or propylene polymer, and at least 50% of the remainder being low density polyethylene. The final products so obtained exhibit good carbon black dispersion on a microscopic basis and are essentially free of carbon black agglomerates, the type of which are usually formed by the more standard processes wherein the initial masterbatch is simply let-down into low density polyethylene by only a single intensive mixing stage.

REFERENCES:
patent: 3418270 (1968-12-01), Traub
patent: 3422056 (1969-01-01), Carton
patent: 3533976 (1970-10-01), Eidman
patent: 3685804 (1972-08-01), Stansfield
patent: 3925301 (1975-12-01), Engel et al.
patent: 4029633 (1977-06-01), Hagopian et al.
patent: 4045403 (1977-08-01), Lever et al.
patent: 4065426 (1977-12-01), Yamawaki et al.
patent: 4148780 (1979-04-01), Blumel et al.
Derwent Abst. 38621c/22 (EP 11242 equin Ref M) 5-28-80 (DT850107)11-18-78 BASF.
Derwent Abst. 55316c/32 (DT 2901776 equin Ref N) 7-31-80 (1-18-79), "Production of Blends of Fine Particles Polyolefin . . . Mixing Process".
Derwent Abst. 24762w/15 (GB 1390100) ICI "Particulate Intimate Mixts . . . ", Apr. 9, 1975.
Derwent Abst. 38915y/22 (J5 2049478) Tatsuta Elec., "Polyolefin . . . and Carbon Black", Apr. 20, 1977.

Affiliated with

Also associated with

Rating

Process for dispersing carbon black in polyethylene does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for dispersing carbon black in polyethylene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for dispersing carbon black in polyethylene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-137766