A security device (100, 600, 700) includes one or more arrangements of image icons (100a, 110b, 615, 715), one or more arrangements of refractive image icon focusing elements (120, 605, 705), and a sealing layer (127, 600, 1005) which includes an organic resin and nanoparticles. Further, the one or more arrangements of refractive image icon focusing elements is disposed above the one or more arrangements of image icons such that a portion of the one or more arrangements of refractive image icon focusing elements forms a synthetic image of a portion of the one or more arrangements of image icons. Still further, the one or more arrangements of refractive image icon focusing elements contact the sealing layer along a non-planar boundary.

Stabiliser, comprising the reaction product of at least one macromer with at least one C.sub.4-30-alkyl(meth)acrylate in at least one polyether polyol 1 in the presence of at least one free radical polymerisation catalyst and optionally at least one chain transfer agent, the at least one macromer being at least one molecule which comprises in its structure one or more polymerisable double bonds, able to copolymerise with C.sub.4-30-alkyl(meth)acrylates and which furthermore comprises in its structure one or more hydroxyl-terminated polyether chains.

The present invention relates to the synthesis of polymer polyols in unsaturated polyols as liquid phase, polymer polyols and their use.

A method of tertiary production of mineral oil from underground deposits having a deposit temperature of 70 C., in which a copolymer comprising (meth)acrylamide or derivatives thereof, monoethylenically unsaturated carboxylic acids, especially acrylic acid, and an associative monomer is used, wherein the amount of the associative monomer is 0.1% to 0.9% by weight. A water-soluble copolymer comprising (meth)acrylamide or derivatives thereof, monoethylenically unsaturated carboxylic acids, especially acrylic acid, and 0.1% to 0.9% by weight of an associative monomer.

A method of tertiary production of mineral oil from underground deposits having a deposit temperature of 70 C., in which a copolymer comprising (meth)acrylamide or derivatives thereof, monoethylenically unsaturated carboxylic acids, especially acrylic acid, and an associative monomer is used, wherein the amount of the associative monomer is 0.1% to 0.9% by weight. A water-soluble copolymer comprising (meth)acrylamide or derivatives thereof, monoethylenically unsaturated carboxylic acids, especially acrylic acid, and 0.1% to 0.9% by weight of an associative monomer.

The present disclosure relates to a novel type of recognitive biodegradable nanoparticles and their preparations. In particular, the present disclosure relates to combinations of MIPs and biodegradable nanoparticles.

The present invention discloses a polycarboxylic acid water-reducing agent with high adaptability to temperature and a method for preparing the same. The polycarboxylic acid water-reducing agent is prepared by introducing an unsaturated macromonomer D with a temperature-sensitive side chain which could be bonded to the backbone of the polycarboxylic acid through free radical polymerization. The polycarboxylic acid water-reducing agent prepared by the invention has an adsorption group density that can be automatically adjusted with the change of ambient temperature, and thereby shows similar dispersing capability and dispersion retention capability at different ambient temperatures, demonstrating high adaptability to different ambient temperatures. It can be used in a larger temperature range with a constant dosage, which is beneficial to further popularization and application of the polycarboxylic acid water-reducing agent in regions of different climates.

This invention relates to a process for preparing a stable low viscosity polymer polyol having a solids content of at least about 30% by weight. This process comprise free-radically polymerizing one or more base polyols, one or more pre-formed stabilizers, and one or more ethylenically unsaturated monomers in the presence of one or more free-radical polymerization initiators, and one or more polymer control agents; in which the process is restarted after being stopped by (I) restarting the feed of base polyol and the initiator; (II) continuing the base polyol and initiator feed until the total feed amounts to at least 5% of the total reactor volume; and (III) restarting the feed of the ethylenically unsaturated monomers in which the ratio of monomers to total feed is ramped up to its final value over a period of not less than 25% of the reactor residence time. This process is particularly suitable for restarting the process of production after any planned or unplanned reactor shutdown.

The producing method includes: (I) providing an active energy ray curable resin composition for mold surface release treatment between a mold having uneven microstructure on its surface and a substrate, and after curing the resin composition by irradiation with an active energy ray, peeling off the substrate together with a cured article of the active energy ray curable resin composition from the surface of the mold, thereby performing a release treatment to the surface of the mold; and (II), after step (I), providing an active energy ray curable resin composition for shaping between the substrate and the mold, the surface of which has been treated by the release treatment, and after curing the resin composition by an active energy ray, peeling off the substrate together with a cured article of the active energy ray curable resin composition for shaping from the surface of the mold.

The producing method includes: (I) providing an active energy ray curable resin composition for mold surface release treatment between a mold having uneven microstructure on its surface and a substrate, and after curing the resin composition by irradiation with an active energy ray, peeling off the substrate together with a cured article of the active energy ray curable resin composition from the surface of the mold, thereby performing a release treatment to the surface of the mold; and (II), after step (I), providing an active energy ray curable resin composition for shaping between the substrate and the mold, the surface of which has been treated by the release treatment, and after curing the resin composition by an active energy ray, peeling off the substrate together with a cured article of the active energy ray curable resin composition for shaping from the surface of the mold.