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813 results about "Acrylic adhesive" patented technology

Preparation method of medium/low-viscosity high-thixotropy nano calcium carbonate for aqueous system

The invention relates to a preparation method of nano calcium carbonate, particularly a preparation method of medium/low-viscosity high-thixotropy nano calcium carbonate for an aqueous system, which comprises the following steps: carbonizing a calcium hydroxide suspension and carbon dioxide in a reactor to generate nano calcium carbonate; and carrying out mixed coating on the obtained nano calcium carbonate by liquid-phase coating treatment and surface treatment to obtain highly-dispersed surface-activated nano calcium carbonate powder. The nano calcium carbonate prepared by the method provided by the invention can obviously enhance high thixotropy and low viscosity properties of the aqueous system. After the modified nano calcium carbonate is added into acrylic adhesive, the thixotropic value of the system is greatly enhanced by 290 times, but the viscosity is only enhanced by 10 times. In addition, the nano calcium carbonate prepared by the method has the advantages high whiteness, small average particle size, narrow particle size distribution, high compatibility with the aqueous system, and high stability, and is applicable to the fields of aqueous adhesive, aqueous paint, other aqueous polymers and the like.
Owner:淄博嘉泽纳米材料有限公司

Pressure-sensitive adhesive type polarizer with retardation layer, process for producing the same, optical film, and image display

ActiveCN101080657AEasy to identifySuppresses changes in optical propertiesPolarising elementsAcid polymer adhesivesPolyvinyl alcoholPotassium
The present invention provides a pressure-sensitive adhesive type retardation-layer-possessing polarizer (4) obtained by forming a polarizer (2) comprising an iodine-containing polarizing element (1) and transparent protective films superposed respectively on both sides thereof, disposing a retardation layer on at least one of the transparent protective films of the polarizer (2) to produce a retardation-layer-possessing polarizer (3), and further superposing a pressure-sensitive acrylic adhesive layer on the retardation layer side. In the iodine-containing polarizing element (1), the ratio of the content of potassium (K) (wt.%) to the content of iodine (I) (wt.%), (K / I), is 0.200-0.235. In the polarizer (2), the iodine-containing polarizing element (1) has been laminated to the transparent protective films through an adhesive layer formed from a water-soluble adhesive comprising a polyvinyl alcohol resin having acetoacetyl groups and a crosslinking agent. The retardation-layer-possessing polarizer (3) has a degree of shrinkage in the absorption axis direction, as measured after 24-hour standing at 80 DEG C and expressed by the following equation, of 0.5% or lower. The pressure-sensitive adhesive type retardation-layer-possessing polarizer (4) by itself has a transmittance of 41.0-43.2%. This pressure-sensitive adhesive type retardation-layer-possessing polarizer can be inhibited from changing in optical properties even under high-temperature high-humidity conditions and can keep visibility high.
Owner:NITTO DENKO CORP
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