C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1346
C08L 51/02 (2006.01) C08F 251/02 (2006.01) C08L 61/06 (2006.01) C08L 61/20 (2006.01) C08L 61/24 (2006.01)
Patent
CA 1171578
ABSTRACT OF THE DISCLOSURE A process is provided for preparing a graft polymer- modified cellulose pulp filler from cellulose sulfite pulp having an R18 value greater than 80%, which comprises adding to the pulp a redox initiator; washing the pulp with water having a pH below 5 in an amount sufficient to adjust the redox initiator cation content to within the range from about 5 to about 1000 ppm of cellulose sulfite pulp; adding hydrogen peroxide in an amount to provide within the range from about 0.1% to about 4% H2O2 by weight of the sulfite pulp; and then reacting the pulp with at least one monomer having the formula: Image in which: R1 is hydrogen or methyl; and R2 is selected from the group consisting of nitrilo -CN, amide Image , and COOR3 groups, wherein R3 is selected from the group consisting of methyl, ethyl, n-butyl, isobutyl and 2-ethyl- hexyl; at a temperature at which grafting of the monomer onto the cellulose polymer molecule proceeds but below about 70°C for a time less than twelve hours under an inert atmosphere in a grafting ratio within the range from about 1 to about 40% and an average degree of polymeri- zation within the range from about 20 to about 4000; and then re- covering the graft polymer-modified cellulose sulfite pulp. The resulting cellulose pulp is adapted for use as a filler for thermosetting resins, Imparting to the resins increased impact strength and structural strength, improved resistance to heat distortion and shrinkage, and decreased water absorptivity.
377030
Macrae & Co.
Mo Och Domsjo Aktiebolag
LandOfFree
Process for preparing cellulose pulp filler for... 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 preparing cellulose pulp filler for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing cellulose pulp filler for... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1230646