摘要:
Copolymers having the general formula: ##STR1## are useful as compatibility, dispersion and grinding agents for aqueous pigmentary suspensions formulated from a mixture of mineral pigments, at least one of which is hydrated calcium sulfate. These suspensions are useful in papermaking.
摘要:
This invention relates to the use, in a foamy aqueous suspension of calcium sulfate hemihydrate, as an agent having the dual function of being a dispersing agent and an anti-defoaming agent, of a comb polymer made up of (meth)acrylic acid, a monomer which is an alcoxy- or hydroxy-polyalkylene glycol, and an ester of (meth)acrylic acid. It also relates to the aqueous suspensions thereby formed, and the plasterboard manufactured from 2 sheets of paper containing a body resulting from the drying of said suspensions.
摘要:
A first object of the invention is a process for thickening of an aqueous composition, through the introduction into the said composition for thickening of at least one polymer, characterized in that the said polymer contains at least one anionic monomer, which is an organophosphate monomer.
摘要:
The invention consists of a method for dispersion in water of an alkyd resin, by means of a polymer having associative hydrophobic groups. The formulations obtained then enable a water-based alkyd paint to be manufactured, without having recourse to surfactants or solvents.
摘要:
The invention concerns the polymers obtained by the use of sulfur compounds in a process for controlled radical polymerization in water of acrylic acid and/or acrylic acid with hydrosoluble monomers. It concerns also their uses as dispersant agents or agents to aid grinding and/or co-grinding of mineral matters in aqueous suspensions, and as dispersant agents incorporated directly in aqueous formulations containing mineral matters. Finally, the invention concerns the formulations of mineral matters obtained in this manner.
摘要:
The invention relates to novel sulphur compounds, to the production thereof by a method carried out in an aqueous medium and the use thereof in the form of transfer agents in a method for controlled radical polymerization of acrylic acid and/or acrylic acid with water-soluble monomers in water. The thus obtained polymers are usable in the form of dispersing agents or grinding aid agents and/or aid agents for combined grinding of mineral materials in an aqueous suspension and in the form of dispersing agents directly incorporated into aqueous formulations containing mineral materials.
摘要:
The invention consists in the use, as a thickening agent of an aqueous formulation which is, notably, salt-rich, of a water-soluble or alkali-soluble copolymer consisting of (by weight): a) 30% to 45% of (meth)acrylic acid, b) 50% to 60% of acrylamide and/or of N-methylol and/or of an acrylic ester, c) 2% to 10% of a hydrophobic monomer of formula R1—(R2O)m—R3, in which: R1 designates a polymerisable unsaturated group, R2O designates an alkylene oxide group having 1 to 6 carbon atoms, m is an integer of between 20 and 50, R3 designates a linear alkyl chain comprising at least 16 and at most 26 carbon atoms, d) 0.1% to 4% of at least one cross-linking agent, which is preferentially ethyleneglycoldimethacrylate (EDMA).
摘要:
The object of the invention is the use, as a thickening agent for a water-based paint, of an aqueous solution of a polyether of at least one polyoxyalkylene and at least one alpha-olefin epoxy, and/or at least one aliphatic or aromatic glycidyl ether, and at least one surface active agent whose chemical formula is CxH2x+1—(OX)y—OH where OX designates an oxylakylated unit, and characterized in that: for the polyether, the molar ratio (polyoxyalkylene:alpha-olefin epoxy or aliphatic or aromatic glycidyl ether) is between (1:4) and (1:10), for the surface active agent, 6≦x≦12 and 5≦y≦12, said solution exhibits a mass ratio (polyether/surface active agent) of between 2.0 and 0.5, and exhibits a water content of 30% to 75% of its total weight. Another object is the paint containing such a thickening system.
摘要:
The invention concerns the polymers obtained by the use of sulphur compounds in a process for controlled radical polymerization in water of acrylic acid and/or acrylic acid with hydrosoluble monomers. It concerns also their uses as dispersant agents or agents to aid grinding and/or co-grinding of mineral matters in aqueous suspensions, and as dispersant agents incorporated directly in aqueous formulations containing mineral matters. Finally, the invention concerns the formulations of mineral matters obtained in this manner.
摘要:
A first object of the invention is a process for thickening of an aqueous composition, through the introduction into the said composition for thickening of at least one polymer, characterised in that the said polymer contains at least one anionic monomer, which is an organophosphate monomer.A second object of the invention consists of the aqueous compositions thus thickened, and containing the said polymers.