51results about How to "High color sensitivity" patented technology

To provide a thermosensitive recording label, which contains a base, an under layer, a thermosensitive coloring layer, a barrier layer, a release layer, and an adhesive layer, where the under layer, the thermosensitive coloring layer, the barrier layer, and the release layer are disposed on one surface of the base in this order, and the adhesive layer is disposed on the other surface of the base, wherein the release layer contains a cured product of a heat curing silicone resin, and the barrier layer contains a cured product of a water-soluble resin with a crosslinking agent, and inorganic filler.

The invention belongs to chemical materials in the field of new materials, in particular to an emulsion polymer adhesive used for waterproof, oil-proof and antifriction thermal sensitive paper. The emulsion polymer adhesive comprises the following components in percentage by weight: acrylamide, acrylic acid or methacrylic acid, butyl acrylate, methyl methacrylate, hydroxypropyl methacrylate, acrylonitrile and the like. The emulsion polymer adhesive used for the waterproof, oil-proof and antifriction thermal sensitive paper has the advantages of high viscosity stability, heat resistance, bonding strength, color sensitivity and waterproof, oil-proof and antifriction performance and capability of meeting the environmental protection requirement.

A thermosensitive recording material is provided having improved resistance to heat and chemicals, and having improved sensitivity to image formation while minimizing background coloring, wherein the thermosensitive recording material has a substrate, on which is a thermosensitive recording layer containing a leuco dye, a developer of formula (I) and at least two sensitizers, the two sensitizers being 4-hydroxy-4′-allyloxy diphenylsulfone and 4,4′-diallyloxy diphenylsulfone.

The invention discloses a novel semi-quantitative visualized ELISA analysis method. The analysis method comprises the following steps: (1) a preparation of chromogenic nano-gold; (2) an ELISA adsorption and color development reaction. The invention has the advantages of easily available raw materials and low cost, complex detection equipments are not needed, and detection result can be determined by naked eyes. The method has the advantages of simple operation method, good reappearance and good stability. The method can be directly applied to semi-quantitative rapid detection of various clinic marker proteins, and the widely applied to life science and clinical medicine detection and other fields.

The present invention provides a heat-sensitive recording material with enhanced color developing sensitivity maintaining heat resistance and image storage stability characteristics such as plasticizer resistance and water resistance. The present invention provides a heat-sensitive recording material including at least a substrate and a heat-sensitive color developing layer containing a leuco dye and developers on the front surface of the substrate, wherein as the developers 4-hydroxy-4′-allyloxydiphenyl sulfone is used in combination with a first diphenyl compound represented by formula (1) and/or a second diphenyl compound represented by formula (2).

A photochromic chromene compound having an indeno(2,1-f)naphtho(1,2-b)pyran structure as its basic skeleton, an aryl group or a heteroaryl group at the 6-position carbon atom of the structure and an electron donor group having a Hammett constant σ_p of not more than −0.1 at the 7-position carbon atom.

The invention provides a penetration flaw detection agent for a penetration flaw detection process, which comprises the following components in parts by weight: penetrant: 100 parts of water; 2-5 parts of dye; 1-5 parts of potassium hydroxide; 5-10 parts of hydroxypropyl starch phosphate; 2-5 parts of triethanolamine; an imaging agent: 100 parts of water; 3-8 parts of adsorbent, 5-10 parts of absolute ethyl alcohol, 5-10 parts of butoxydiglycol, and 2-5 parts of dextrin. In order to overcome the defects in the prior art, the invention provides the penetration flaw detection agent for the penetration flaw detection process, which has the advantages of high flaw detection efficiency, simplicity in operation, no damage to products and high sensitivity.

The invention provides a phenolsulfonic acid aryl ester represented by formula (1)

wherein each symbol is as defined in the description. The phenolsulfonic acid aryl ester is useful as a developer to provide a thermal recording material with good color-developing sensitivity, image density when printed at a low application energy (i.e., high start-up sensitivity), and heat and plasticizer resistance. The invention also provides a thermal recording material using the developer.

The invention discloses a reversible thermosensitive color-changing transformer early-warning insulating sheath material and a preparation method thereof. The sheath material is prepared from the following raw material components in parts by weight: 50 to 80 parts of silicone rubber, 10 to 15 parts of polypropylene resin, 10 to 30 parts of a styrene thermoplastic elastomer, 10 to 15 parts of dioctyl maleate, 30 to 40 parts of fumed silica, 15-20 parts of nano wollastonite, 10-20 parts of a reversible thermochromic material, 3 to 5 parts of filling oil, 20 to 40 parts of a flame retardant, 3 to5 parts of a compatilizer, 1 to 5 parts of a vulcanizing agent and 1 to 5 parts of an antioxidant. The sheath material prepared by the invention is a transformer insulation sheath material capable ofinstantly and reversibly changing color in a relatively large temperature range, so that an early warning function is achieved, and the sheath material has excellent mechanical and physicochemical properties.

A chromene compound having a skeleton represented by the following formula (1) and exhibiting double peak characteristic:

wherein Z is a group represented by anyone of the following formulas:

(R¹ is an electron donor group having a Hammett constant σ_p of less than −0.20, with the proviso that when there are a plurality of R¹'s, R¹'s may be the same or different, and R² is a group having a Hammett constant σ_p of −0.20 to 0, with the proviso that when there are a plurality of R²'s, R²'s may be the same or different)

and “a” is an integer of 1 to 3, with the proviso that when “a” is 2 or 3, Z's may be the same or different but

cannot be

The invention relates to the technical field of thermosensitive labels, in particular to a bottom blue-developing thermosensitive label and a preparation method thereof. The bottom blue-developing thermosensitive label comprises a bottom layer and a dye layer which are sequentially arranged from bottom to top, wherein the bottom layer is carbon-source-free paper, and the dye layer is made of developing dye; the color development dye comprises the following raw materials in parts by weight: 25-30 parts of a colorless buffer toner, 10-15 parts of a color developing agent, 3-8 parts of a flattingagent A, 3-5 parts of a defoamer A, 2.5-3.0 parts of an aqueous polytetrafluoroethylene modified wax dispersion, and 30-35 parts of a solvent A. The dye layer of the bottom blue-developing thermosensitive label can change the color developing of the printed characters in a printing state of a thermosensitive printer, can improve the withered monotonous sense of only single black characters at present and can improve the color development effect. The preparation method of the bottom blue-developing thermosensitive label has the advantages of the simple operation, the easy control, the high production efficiency and the stable quality, and can be used for mass production.

The invention relates to the technical field of biology, and discloses a neutrophile granulocyte alkaline phosphatase staining kit and a staining method. The kit comprises an alkaline phosphatase substrate solution with the pH value being 9.2-9.8. The alkaline phosphatase substrate is N-(2-methyl-5-methoxyl-4-xenyl)-3-phosphoric acid oxygroup-2-naphthamide. The alkaline phosphatase substrate replaces existing naphthol AS-BI sodium phosphates, naphthol AS-MX sodium phosphates and the like for conducting NAP staining, chromophoric group xenyl is introduced in the chemical structure of the substrate, the reacting color intensity of naphthol produced by hydrolysis of the substrate by the alkaline phosphatase and tetrazonium salt is enhanced, and therefore the color display sensitivity and positive staining of the alkaline phosphatase are greatly improved.

A chromene compound which develops a color of a neutral tint and has little initial coloration, high double peak characteristic and high color development sensitivity, rarely experiences the reduction of color optical density though it has high fading speed, is excellent in the durability of photochromic properties and can dissolve in a monomer composition which will become a substrate for optical articles in a high concentration, and a photochromic curable composition comprising the chromene compound and polymerizable monomers.

The chromene compound is represented by the following formula (1).

(wherein R³ at the 11-position is a second sulfur-containing substituent selected from the group consisting of thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group, heteroarylthio group, sulfonyl group and sulfinyl group, R¹ and R² at the 6-position and the 7-position are a combination of an aryl group or a heteroaryl group and an electron donating group having a Hammett constant σ_p of −0.1 or less, or R¹ and/or R² is a first sulfur-containing substituent selected from thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group and heteroarylthio group.).