Boron compound suspension
AssigneeC-IP S.A.
InventorsPhilippe Ceulemans, Olivier Ceulemans
Life of this patent
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Abstract
A suspension of a boron containing compound in the form of crystals, powder or granulate in a solvent which contain a carbomer as dispersant. This suspension is very stable, even at high concentrations, and exhibits favourable non-Newtonian viscosity behavior, which makes it suitable in a number of applications, such as for the control of fission reactions with the generation of electric power from nuclear energy.
Claims24
A suspension of a boron containing compound in water, wherein the suspension comprises a carbomer, whereby the carbomer comprises at least one homopolymer of an α,β-unsaturated monocarboxylic acrylic acid having 3-5 carbon atoms, which corresponds to formula III
- CH2═CR—COOH formula III
- in which R represents a sub stituent selected from the group of H, monovalent alkyl, aryl or alkylaryl residues and monovalent cycloalkyl residues, or whereby the carbomer comprises at least one a copolymer, whereby the acrylic acid of the formula III is copolymerized with at least one alkylacrylate having formula IV:
- CH2═CR′—CO—OR″ formula IV
- whereby R′ is selected from the group consisting of H, methyl, ethyl and R″ is a C10-C30 alkyl group, the carbomer has a molecular weight (Mw) in the range of 50,000 to 5,000,000 and is cross-linked, and the carbomer is present in a concentration of at least 50 ppm by weight and whereby the boron containing compound is selected from the group consisting of boric acid, a sodium or potassium polyborate, in its hydrate or non-hydrate form and whereby the boron containing compound is present as a granulate of which at most 4.00% wt of the particles pass through a sieve with openings of 0.063 mm and at most 10.00% wt is retained in a sieve with openings of 1.000 mm.
A suspension of a boron containing compound in water, wherein the suspension comprises a carbomer, whereby the carbomer comprises at least one homopolymer of an α,β-unsaturated monocarboxylic acrylic acid having 3-5 carbon atoms, which corresponds to formula III
- CH2═CR—COOH formula III
- in which R represents a sub substituent selected from the group of H, monovalent alkyl, aryl or alkylaryl residues and monovalent cycloalkyl residues, or whereby the carbomer comprises at least one a copolymer, whereby the acrylic acid of the formula III is copolymerized with at least one alkylacrylate having formula IV:
- CH2═CR′—CO—OR″ formula IV
- whereby R′ is selected from the group consisting of H, methyl, ethyl and R″ is a C10-C30 alkyl group, the carbomer has a molecular weight (Mw) in the range of 50,000 to 5,000,000 and is cross-linked, and the carbomer is present in a concentration of at least 50 ppm by weight, and whereby the suspension is obtainable
- a) by mixing the boron containing compound into a solution of the carbomer in the water, or
- b) by adding the carbomer into a suspension of the boron containing compound in the water,
- whereby the boron containing compound is selected from the group consisting of boric acid, a sodium or potassium polyborate, in its hydrate or non-hydrate form and whereby the boron containing compound is present as a granulate having a particle size distribution which by sieving shows at most 4.00% wt of particles passing through a sieve with openings of 0.063 mm and at most 10.00% wt is retained in a sieve with openings of 1.000 mm.
Dependencies are inferred from the claim text.