The Pilot Ink Co., Ltd.

Other

Kuraray Co., Ltd.

The Pilot Inc Co., Ltd.

Tsutomu Kito

Yutaka Shibahashi

Norikazu Nakasuji

Hiroshi Inagaki

Kuniyuki Senga

Takashi Kataoka

Hiroyuki Hayashi

Tsutomu Tomatsu

Nobuaki Matsunami

Kyoji Aoyama

Naomasa Miyashita

Kazuhiko Tanaka

Masao Kawamoto

Kenji Hiramatsu

Hiroyuki Nakamura

Tadashi Aoki

A rubber-erasable aqueous ink for a writing material composition contains water, a water-soluble polar solvent, and a particulate adhesive colored resin. The particulate adhesive colored resin contains a pigment and an adhesive resin which is adhesive on at least a part of a surface thereof. The particulate adhesive colored resin has a particle diameter distribution such that the amount of particles having a particle diameter of from 2 &mgr;m to 20 &mgr;m is not less than 70% by weight of all the particles.

Rubber-erasable aqueous ink for writing material composition and writing materials using the same

A method for energizing an energization-operated toy element in which an electric double layer capacitor is employed as energization means for energizing a toy element which is operated upon application of low voltage, the capacitor is charged upon reception of a current from a DC power source, and the charged electric power is used to energize a toy load as a discharge current to operate the toy element. An energization-operated toy which comprises an energization heating color changing element provided with an energization resistant heating member for generating heat upon application of the DC voltage and a thermal color changing layer disposed in contact with or close to the heating member, energization means consisting of an electric double layer capacitor for generating heat by supplying the discharge current to the energization resistant heating member, and a power source for supplying the DC voltage from 0.5 V to 9.0 V to the capacitor.

Method for energizing energization-operated toy element and

A microcapsulated pigment contains, as reaction media one or more specific aliphatic acid alcohol esters obtained from monohydric aliphatic alcohols having odd numbers of carbon atoms and aliphatic carboxylic acids, these reaction media in a homogeneous compatible state with chromatic components are occluded in microcapsules to obtain characteristics of thermochromism with a hysteresis range (segment HG) from 8.degree. C. to 30.degree. C.

Temperature-sensitive color-memorizing microencapsulated pigment

A shear-thinning water-based ball-point pen ink composition comprising from 1% by weight to 35% by weight of a colorant, from 2% by weight to 35% by weight of a water-soluble polar solvent, from 1% by weight to 30% by weight of a nonionic surface active agent having an HLB value within the range of from 8 to 12, and the balance being water and adjusting additives, and having a viscosity within the range of from 25 mPa.s to 160 mPa.s (a value at the number of revolution of 100 rpm in an EM type rotational viscometer, 25.degree. C.) and a shear thinning index within the range of from 0.1 to 0.6; the nonionic surface active agent having a mixed phase comprising a phase standing dispersed in the form of fine particles and a phase standing dissolved in a molecular state.

Preparation method for shear-thinning water-based ball-point pen inks

A temperature-dependent color/transparency storing resin layer is composed by dispersing and fixing a mutually dissolved homogeneous composition consisting of (A) an electron-donating color-developing organic compound, (B) a compound having a phenolic hydroxyl radical, and (C) a compound selected from alcohols, esters, ketones and carboxylic acids, in vinyl chloride-vinyl acetate-copolymer matrix resin, as small particles, and capable of exhibiting reversible change in color and in transparency in response to a temperature variation with hysteresis, and selectively storing a state developed above the high trigger temperature and a state developed below the low trigger temperature in a temperature range between the high and low trigger temperatures, wherein the transparency is improved by blending vinyl chloride-vinyl acetate-vinyl alcohol copolymer and/or vinyl chloride-vinylidene chloride copolymer as an agent for improving the transparency in said matrix resin so as to regulate the transparency and to conspicuously improve the transparency especially exhibited in a temperature range above the high trigger temperature, so as to constitute a laminate member to be applied in various fields.

Temperature-dependent color/transparency storing resin composition and

The present invention provides a thermally color-changeable toy constituted by a thermally color-changeable article, and a color-changing device in which the color-changeable article is stored in a air cooling chamber so that the color of the thermally color-changeable article is thermally changed by cool air. The color-changing device is constituted by a cooling source chamber for storing therein a plurality of piled up cool blocks, the air Cooling chamber communicating with the cooling source chamber so as to circulate air, and an air blower disposed in a communication path between the cooling source chamber and the air cooling chamber. Air flow gaps are formed among the cool blocks so as to improve the cooling efficiency.

Thermally color-changeable toy

A thermochromic opaque/transparent composition is capable of exhibiting change in transparency together with change in color in response to temperature variation, a laminate member employing the same, and a three-dimensional article capable of concealing and revealing the interior, utilizing the laminate member. A thermochromic opaque/transparent composition is composed of dispersion, in vinyl chloridevinyl acetate copolymer matric resin, which has been obtained by blending with hindered amine compound selected from piperidine derivatives within a particle size range of 0.1 to 2.0 .mu.m, of a reversible thermochromic material consisting of (a) an electron-donating color-developing organic compound, (b) a compound having a phenolic hydroxyl radical, and (c) a homogeneous fused composition containing a compound selected from alcohols, esters, ketones and carboxylic acids, and capable of exhibiting reversible change in transparency together with change in color in response to temperature variation, with hysteresis with a temperature difference of 10.degree. C. to 50.degree. C. between the low and high trigger temperatures.

Thermochromic opaque/transparent composition, laminate member employing

There are provided a thermochromic opaque composition capable of exhibiting change in transparency together with change in color in response to temperature variation, a laminate member employing the same, and a three-dimensional article capable of concealing and revealing the interior, utilizing the laminate member. The thermochromic oaque composition is formed by dispersing a thermochromic material, capable of developing and erasing color by an electron donating-accepting reaction, in small particles in vinyl chloride-vinyl acetate matrix resin. The above-mentioned structure realizes reversible change in transparency, together with change in color, in response to temperature variation, with hysteresis with a temperature difference of 10.degree. C. at minimum to 50.degree. C. between the high and low trigger temperatures.

Thermochromic opaque composition, laminate member employing the same,

A temperature-sensitive color-changeable composite fiber wherein (A) a thermally color-changeable polymer phase (phase A) composed essentially of a thermally color-changeable material and a thermoplastic polymer having a melting point or a softening point of 230.degree. C. or lower, the content of the thermally color-changeable material being 0.5 to 90% by weight and (B) a protective polymer (phase B) composed essentially of a fiber-forming thermoplastic polymer are brought into contact with each other, (i) the protective polymer phase (phase B) occupying at least 60% of the fiber surface area, and (ii) the protective polymer phase (phase B) occupying 20 to 95% by weight relative to the overall fiber. The composite fiber of this invention has reversibly thermally color-changeable performance of excellent temperature-sensitive color-changeability, color vividness, washing durability and light resistance.

Temperature-sensitive color-changeable composite fiber

An toy set having at least one section which bears a color memory dye of an electron-supplying organic coloring compound, an electron accepting compound and an ester. The color memory dye assumes a first color below t1 (.degree.C.) and a second color above t2 (.degree.C.), wherein t2&gt;t1, 0.ltoreq.t1, t2.ltoreq.50.degree. C. and 5.ltoreq.t2-t1.ltoreq.35. Both the first and second colors can be displayed between t1 and t2. For the purpose of determining the proper temperature range for a color characteristic, temperature-sensitive visual indicators are provided.

Toy that stably exhibits different colors with indicator for proper

An artificial plant having at least one section which bears a color memory dye of an electron-supplying organic coloring compound, an electron accepting compound an an ester. The color memory dye assumes a first color below t1 (.degree. C.) and a second color above t2 (.degree. C.), wherein t2&gt;t1, 0.ltoreq.t1, t2.ltoreq.50.degree. C. and 5.ltoreq.t2-t1.ltoreq.35. Both the first and second colors can be displayed between t1 and t2.

Artificial plant that stably exhibits different colors

A color memory toy set has a color memory toy with surface, at least one portion of the surface being provided with a color memory temperature-sensitive color changing layer colored with a coloring material including a color memory temperature-sensitive dye exhibiting hysteresis characteristics in response to temperature change between a colored state and a colorless state or between a color (I) state and a color (II) state. The toy set also includes a writing pen for either causing an image to appear or disappear on the color memory temperature-sensitive layer by drawing the image on the layer to change the color state of the drawn portion into a first state, or for causing an image to appear or disappear on the color memory temperature-sensitive layer by drawing the image on the layer to change the color state of the drawn portion to a second state.

Color memory toy set

A new reversible heat sensitive recording composition for erasable recording is disclosed which is used as a recording or marking material that is capable of erasure at a specific temperature so that coloring or decoloring can be controlled to occur at desired temperature ranges. This range or the hysteresis value of the composition is determined by the .DELTA.T value of the contained ester compound. In addition, the compostion can provide a wide variety of hues and can readily be prepared. The marking or recording drawn in this composition can be maintained at room temperature or less.

Reversible heat sensitive recording composition

A new reversible temperature indicating composition for use in temperature indicating instruments is diclosed which is capable of accurate temperature indication in a variety of colors and characterized by a minimum range of hysteresis so that the marking drawn in this composition can decolor at or close the temperature at which its coloring takes place. In addition, the composition can provide a wide variety of hues and can be readily prepared. These and other advantages are provided by the inclusion as a main ingredient of an ester compound having .DELTA.T value, defined .DELTA.T=melting point--clouding point, in the range under 3.degree. C., the value that determines a desirably small range of hysteresis.

Reversible temperature-indicating composition

A new reversible heat sensitive recording composition for erasable recording is disclosed which is used as a recording or marking material that is capable of erasure at a specific temperature so that coloring or decoloring can be controlled to occur at desired temperature ranges. This range or the hysteresis value of the composition is determined by the .DELTA.T value of the contained ester compound. In addition, the composition can provide a wide variety of hues and can readily be prepared. The marking or recording drawn in this composition can be maintained at room temperature or less.

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Tajimi, Japan

Tsutomu Kito