C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/2054
C08F 255/02 (2006.01) C08F 4/32 (2006.01) C08F 255/00 (2006.01) C08F 265/02 (2006.01) C08F 265/04 (2006.01)
Patent
CA 2000507
A process for the catalytic grafting of an ethylenically unsaturated monomer onto a copolymer in the presence of a catalyst is disclosed. The monomer is a selected from the group consisting of ethylenically unsaturated carboxylic acids, anhydrides esters and other derivatives thereof. The copolymer is selected from the group consisting of copolymers of ethylene with at least one monomer selected from the group consisting of vinyl alkylates, carbon monoxide, acrylic acid, methacrylic acid, acrylate esters and methacrylate esters, and mixtures thereof, and ionomers of such copolymers. The catalyst is comprised of a mixture of (a) water and (b) at least one phosphorus-containing compound selected from the group consisting of (i) phosphorus compounds of the formula HPO(OR1)2, where each R1 is independently selected from H, alkyl, aryl and alkaryl, (ii) phosphite compounds of the formula P(OR2)3, where each R2 is independently selected from alkyl, aryl and alkaryl, (iii) phosphite compounds of the formula (OR3)2P-O-R4-O- P(OR5)2, where each of R3, R4 and R5 is independently selected from alkyl, aryl and alkaryl, and (iv) di-substituted pentaerythritol diphosphites of the formula (R6O)P-O2R PE O2-p(OR7), where each of R6 and R7 is independently selected from alkyl, aryl and alkaryl and O2R PE O2 represents the pentaerythritol moiety. The amount of water being about 0.01-10 parts by weight per part of phosphorus-containing compound, with the proviso that if the phosphorus-containing compound is phosphorous acid then the amount of water is 0.001-10 parts. The process comprises admixing copolymer, monomer, at least 15 ppm of catalyst and 25-2500 ppm of an organic peroxide having a half-life of from about 1 minute to about 120 minutes at 150°C, and admixing at a temperature above the melting point of said copolymer for a period of time that is at least 4 times the half-life of the organic peroxide so as to obtain a uniform distribution of monomer, catalyst and peroxide in the copolymer. The resultant grafted copolymer is then extruded into a shaped article. The grafted polymer has improved colour, and is useful in adhesive systems and as a compatibilizer for polymers and other materials.
Dimock Stratton Llp
Du Pont Canada Inc.
LandOfFree
Process for the preparation of grafted polymers of improved... 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 the preparation of grafted polymers of improved..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of grafted polymers of improved... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1613569