Chryso, National Polytechnic Institute of Toulouse and French National Institute for Agricultural Research | Date: 2013-12-20
A method for the synthesis of /-alcoxylated glycerol linear carbonic esters, wherein the following are brought into contact at a reaction temperature lower than 220 C.: a quantity of at least one precursor selected from the group consisting of /-alcoxylated glycerol cyclo-carbonates; a quantity of at least one catalyst selected from the group consisting of metal oxides, Lewis acids, organometallic catalysts and mineral bases; and a quantity of at least one organic primer. A composition containing at least one novel /-alkoxylated glycerol linear carbonic ester.
Chryso | Date: 2013-09-26
The invention relates to a copolymer comprising a main hydrocarbon chain and side groups including carboxylic groups and polyoxyalkylate groups, characterized in that it further includes gem acetophosphonate groups, an adjuvant for suspensions of mineral particles comprising said copolymer and a method for preparing said copolymer. Finally it also relates to the use of said copolymer for fluidifying and maintaining fluidity of suspensions of mineral particles and for reducing the sensitivity of hydraulic binders to clays and alkaline sulfates. Finally it relates to a composition of mineral particles comprising this copolymer.
Chryso | Date: 2012-04-13
The invention relates to a copolymer comprising a main hydrocarbon chain and side groups including carboxylic groups and polyoxyalkylate groups, characterized in that it further includes gem-bisphosphonate groups, an admixture for suspensions of mineral particles comprising said copolymer and to a method for preparing said copolymer. Finally it relates to the use of said copolymer for fluidifying and maintaining fluid, suspensions of mineral particles and for reducing the sensitivity of hydraulic compositions to clays and alkaline sulfates. Finally it relates to a composition of mineral particles comprising this copolymer.
Chryso and Lafarge | Date: 2011-08-17
A fast hydraulic binder comprising cement, at least one first superplasticizer, a calcium salt, and at least one second superplasticizer different from the first superplasticizer and comprising a main chain and pendant groups connected to the main chain adapted so as to separate from the main chain in a basic medium, wherein the result is that the second plasticizer has a fluidifying action which increases at least temporarily over time in a basic medium.
Chryso | Date: 2014-05-02
The disclosure relates to an additive system for a hydraulic composition including: at least one polyalkoxylated phosphonate polymer; at least one polyalkoxylated polycarboxylate polymer; and at least one retarding agent of formula (I): C^(1)RH(OH)[CH(OH)]nC(O)O^(1)R (I) for improved maintenance of the rheology of hydraulic compositions of Portland cement.
Chryso | Date: 2013-02-06
The present invention is mainly aimed at a set-accelerating admixture for hydraulic compositions comprising, in an aqueous solution: Moreover it is directed to a method for its preparation as well as to a method for preparing hydraulic compositions comprising the step for adding such an admixture to the hydraulic binder, before, during or after the grinding.
Chryso | Date: 2013-02-21
The invention relates to an anti-filming surface-active admixture for hydraulic binders, including at least one fatty alcohol and at least one oil, to the method for preparing same, and to a method for preparing a hydraulic binder composition suitable for the manufacture of screeds or concretes, comprising the step of adding, to the hydraulic binder composition, the admixture according to the invention in a metered amount of 0.1 to 5 wt % with respect to the weight of the hydraulic binder.
Chryso | Date: 2013-04-05
The invention is mainly directed to an admixture in the form of an aqueous dispersion, comprising: wherein the pH is comprised between 2 and 11, to a method for its preparation as well as to the preparation of a hydraulic composition as well as to its use for accelerating the setting of hydraulic compositions.
Chryso | Date: 2013-07-03
The present invention relates to a method for creating patterns on a surface of the hydraulic binder composition comprising the deposition on the surface of the fresh hydraulic binder composition of a stencil and then application of a deactivating composition (A) on the thereby covered surface.
Chryso | Date: 2012-08-09
The invention relates mainly to a polymer comprising a hydrocarbon-based main chain bearing carboxylic groups and polyalkoxylated chains and up to 4% by weight of anti-oxidant groups, relative to the weight of the final polymer, grafted to the main chain. It also relates to a method for preparing such a polymer and to an admixture which is of use as a plasticizer of suspensions of mineral particles comprising same. Finally, it is related to the use of such a polymer for fluidifying suspensions of mineral particles and reducing the water demand of hydraulic compositions.