Abstract: The present invention relates to crystalline particles [particularly organic particles or agrochemical particles] coated with micelles of copolymers, to compositions comprising such particles, to a process for preparing the coated particles and to uses of the particles and the compositions [for example to produce surface coatings with high loadings of copolymer and uses of products derived therefrom].

Abstract: The present invention relates to a process for coating a surface with micelles which comprise an AB block copolymer comprising the step of treating the surface with an apolar liquid containing the micelles; and to surfaces coated with such micelles.

Abstract: There is provided a security document (10) bearing an image (16) associated with an active substance, wherein the active substance is responsive to tactile pressure (18) in the range 0.01-1O MPa to alter the appearance of the image particularly when viewed under ultraviolet radiation (14). The active substance can be incorporated in an ink forming at least part of the image, in one or more layers associated with or beneath the image, or incorporated within a polymer, or adhesive associated with the image. The active substance comprises at least one of the following: organic or inorganic dye or dyes, chromophore(s), multi-chromophore(s), lumiphore(s). A layer incorporates a UV filter capable of being rendered inoperative in response to pressure, such that tactile pressure thins this layer so that the UV are no longer blocked and reach the lumiphore layer.