Abstract:
The invention concerns a process to manufacture a thermoplastic resin charged with mineral or carbonated matter, and possibly containing an organic impact modifier, through the introduction into the said resin of a comb polymer with at least one ethylenic unsaturation monomer, to which is grafted at least one polyalkylene oxide function. The resins then obtained which also form the subject of the invention have an improved impact resistance without their rigidity being degraded.
Abstract:
The invention consists in the use, in a process of manufacture of GCC and PCC co-ground in water, of a co-grinding agent characterized in that: a) it is constituted by a least one homopolymer and/or at least one copolymer of acrylic acid, which is partially neutralised, of which the rate of molar neutralization is less than 75% of the total acid functions, b) and in that it is introduced: during the stage of preparation of the aqueous suspensions of GCC and PCC, and/or during stage 2) of co-grinding, and possibly during the stage of co-grinding and another stage of concentration, and possibly during this other stage of concentration. The invention also lies in the resulting aqueous suspensions of GCC and PCC, in the dry pigments of GCC and PCC obtained, and in the use of these products in paper, paint, rubber and plastic.
Abstract:
Provided is a method of producing a paint involving dry-grinding a calcium carbonate in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alkoxy or hydroxy polyalkyleneglycol group.
Abstract:
Provided are a method of dry-grinding calcium carbonate in the presence of a grinding aid agent which is a copolymer of (meth)acrylic acid with a monomer containing an alkoxy or hydroxy polyalkyleneglycol group, and a method of producing a hydraulic binder base including dry grinding a calcium carbonate in the presence of the grinding aid.
Abstract:
A method including first grinding, in aqueous media of natural calcium carbonate, an acrylic polymer having a molecular weight of between 8,000 g/mole and 15,000 g/mole and a molar content of less than 20% of polymeric chains of molecular weight less than 3,000 g/mole and second, optionally concentrating, leading to an aqueous suspension with an increased slope factor, which improves the opacity of the coated paper produced from such a suspension.
Abstract translation:一种方法包括首先在天然碳酸钙的水性介质中研磨分子量小于3,000的聚合物链的分子量为8,000g / mol至15,000g / mol且摩尔含量小于20%的丙烯酸聚合物 g / mole,第二,任选地浓缩,导致具有增加的斜率因子的水性悬浮液,这改善了由这种悬浮液产生的涂布纸的不透明度。
Abstract:
The invention consists in the use, in a method for manufacturing a sheet of paper, of an aqueous suspension and/or dispersion of mineral materials as an agent for slowing the penetration of the paper coating into said sheet, characterized in that said suspension and/or dispersion contains at least one water-soluble copolymer made up of at least one ethylenically-unsaturated anionic monomer, and at least one ethylenically-unsaturated oxylalkylated monomer terminated by a hydrophobic chain.It also consists in a method for manufacturing a sheet of paper which implements said copolymer, as well as the sheet of paper obtained.
Abstract:
The present invention is directed to a method for dry milling a material containing a carbonate ore. The method comprises the following steps: (a) dry milling the material in at least one milling unit: (i) in the presence of at least one polyalkylene glycol polymer having monomer units forming a backbone, where at least 90% of the monomer units forming the backbone of the polymer are constituted by ethylene oxide, propylene oxide or their mixtures, and where the polymer has a molecular weight of at least equal to 400 g/mole, (ii) such that the milling unit contains a quantity of water that is less than 10% in dry weight of the material in the milling unit; (b) optionally classifying the material from step a) with at least one classification unit; and (c) optionally repeating steps a) and/or b) with all or part of the material from step a) and/or step b).
Abstract:
A method including first step grinding, in aqueous media of natural calcium carbonate, an acrylic polymer having a molecular weight of between 8,000 g/mole and 15,000 g/mole and a molar content of less than 20% of polymeric chains of molecular weight less than 3,000 g/mole and second, optionally concentrating, leading to an aqueous suspension with an increased slope factor, which improves the opacity of the coated paper produced from such a suspension.
Abstract:
The invention relates to a water-soluble copolymer having at least one alkoxy or hydroxyl polyalkylene glycol function grafted onto at least one ethylenically unsaturated monomer, as an agent to improve the activation of the optical brightness of the end product, in the fields of paper, textile, detergents and paint.
Abstract:
The invention relates to agents that are used to improve optical properties such as opacity and/or brightness of dry products based on mineral matter containing said agents. More specifically, the invention relates to a method of producing dry products based on mineral matter, in which the agents used to improve the opacity and/or brightness of said dry products take the form of controlled-structure water-soluble polymers which are obtained using a controlled radical polymerisation method employing a particular alkoxyamine as a polymerisation initiator. The invention also relates to the use of aqueous suspensions and/or dispersions of mineral matter containing said polymers for the same purpose. The aforementioned dry products comprise plastics, filled paper, dry films produced by drying a coating slip, dry films produced by drying an aqueous paint formulation or dry films produced by drying an aqueous cosmetic formulation, which contain mineral matter as well as said polymers.