Cement additives

C - Chemistry – Metallurgy – 08 – G

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C08G 65/32 (2006.01) C04B 24/26 (2006.01) C04B 24/32 (2006.01) C08F 8/14 (2006.01) C08L 71/02 (2006.01)

Patent

CA 2250139

Substances useful as water reducing and superplasticizer additives for cement compositions are formed by reaction of carboxylic acid polymers with a polyether, preferably a mixture of monofunctional and difunctional polyethers, derived from C2-C4 epoxides wherein partial cleavage of the polyethers and esterification of the polyethers and the cleavage products thereof by the other reactant are achieved. In one embodiment, a sulfonic acid is used to catalyze the reaction of poly(acrylic acid), a monofunctional ethylene oxide-propylene oxide copolymer, and a difunctional poly(propylene glycol), at a temperature in excess of 140 °C.

On obtient des produits servant d'additifs pour ciments réducteurs d'eau et superplastifiants en faisant réagir des polymères d'acide carboxylique avec un polyéther, de préférence un mélange de polyéthers monofonctionnels et polyfonctionnels dérivés d'époxydes C2-C4. On obtient ainsi le clivage partiel et l'estérification des polyéthers ainsi que les produits de leur clivage par l'autre réactif. Dans l'une des variantes, on utilise de l'acide sulfonique pour catalyser la réaction entre un poly(acide acrylique), un copolymère monofonctionnel oxyde d'éthylène/oxyde de propylène, et un poly(propylène glycol) difonctionnel, à une température dépassant 140 DEG C.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Cement additives does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cement additives, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cement additives will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-2025065

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.