摘要:
The invention concerns amphiphilic graft polymers in which the graft base is a polymer containing at least 5 wt % of units of formula (I) and optionally units of formula (II), R1, R2 being H or C¿1?-C6 alkyl, wherein (a) styrene, C1-C2 alkylstyrene and/or vinyltoluene and optionally (b) other monoethylenically unsaturated monomers which can be copolymerized therewith are grafted onto the graft base in a weight ratio of between 1: 99 and 99: 1, and wherein the group (c) is optionally partially or completely cleaved off the graft polymers, forming amino groups. The invention also concerns processes for preparing and using the amphiphilic graft polymers as consolidating agents for paper, as fixing agents for disruptive water-soluble and water-insoluble agents in paper manufacture, as dispersants for inorganic and organic pigments, dyes, concrete and plant-protecting agents, as detergent additives, as coating material for fertilisers and plant-protecting agents, as floor-maintenance agents, as protective colloids for aqueous polymer dispersions, as thickeners for cosmetic formulations, as conditioners for skin-care agents and as a component of hair-cosmetic preparations and cosmetic preparations for oral hygiene.
摘要:
A clayish subterranean formation, such as may be encountered in rock surrounding a well bore during hydrocarbon recovery operations may be stabilized with acid ammonium salt of an imide of polymaleic anhydride. The salt may be unneutralized or partially neutralized. The invention is particularly relevant to hydraulic fracturing fluids used in enhanced oil recovery. The compositions of this invention are more environmentally friendly than some current technology.
摘要:
This invention relates to a soil based material for improving the qualities of the soil. The invention is particularly concerned with improving load bearing qualities and impact loading qualities of the soil. The soil based material includes synthetic fibres (5) scattered throughout the soil matrix (4) and may include additives such as resilient particle (20) also scattered throughout the soil matrix (4). The invention also relates to a method and apparatus for producing the soil based material.
摘要:
Procédé de couverture temporaire de sols contaminés consistant à appliquer sur le sol tout d'abord une couche étanche à base de polymère hydrosoluble, puis ensuite une couche stabilisante à base de fibres végétales.