C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
31/23
C08L 33/08 (2006.01) C08F 220/06 (2006.01) E03F 3/06 (2006.01) F16L 55/1645 (2006.01)
Patent
CA 1168848
-30- MAGNESIUM DIACRYLATE, POLYOL MONOACRYLATE GROUTING COMPOSITION AND METHOD FOR GROUTING JOINTS AND/OR CRACKS IN SEWER CONDUITS THEREWITH ABSTRACT OF THE DISCLOSURE This invention is concerned with an aqueous liquid composition comprising a mixture of unsaturated monomers in- cluding (1) magnesium diacrylate, (2) a polyol monoacrylate selected from hydroxyethyl acrylate and hydroxypropyl acrylate, and (3) a poly ethylenically unsaturated monomer copolymeriz- able with (1) and (2) to produce covalent cross-linking bonds in the copolymer besides the ionizable magnesium bonds. The weight ratio of (3) to the sum of (1) and (2) is in the range of about 3:97 to about 5:95. Examples of monomers that can be used as part or all of component (3) include N,N'- methylene-bis-acrylamide and ethylene glycol diacrylate. The relative proportions between the several monomers are selected to provide on polymerization a cross-linked vinyl addition polymer gel containing both covalent (non-ionic) cross-linking bonds and ionic cross-linking bonds and the relative proportions between the several components may be predetermined to render the composition suitable for applica- tion by conventional mixing packer equipment hereinafter described. In the latter equipment, means is provided to direct a second aqueous solution or suspension containing a water-soluble free radical initiator, such as a persulfate or peroxide, separately but concurrently with the first monomer-containing solution to a common distributor head of the movable packer positioned in the sewer conduit adjacent the joint or crack to be repaired, The monomer solution is provided with a tertiary amine which serves as a reducing agent, thereby providing a redox polymerization system so that when the two liquids mix, upon discharge from the head, a rapid polymerization to a polymer gel occurs at the ambient temperature.
380792
Hayward Baker Company
Hewitt Neville S.
LandOfFree
Acrylate grouting compositions and method for grouting... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Acrylate grouting compositions and method for grouting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acrylate grouting compositions and method for grouting... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1275369