36 results about "Gardner color scale" patented technology

Quantity of flux coated on fusible alloy of a thermal fuse disclosed can be inspected accurately by an image processing method. The thermal fuse comprises:

• • (a) first insulation film 11 coupled with a pair of metal terminals 12;
  • (b) fusible alloy 13 coupled between ends of the metal terminals 12, being placed above first insulation film 11;
  • (c) flux 14 coated on fusible alloy 13; and
  • (d) second insulation film 15 disposed on first insulation film 11 so that an internal space is formed, being placed above fusible alloy 13,
  • wherein at least either of first insulation film 11 or second insulation film 15 is transparent or translucent, and flux 14 has the Gardner color scale from 4 to 16.

The invention provides an ultraviolet light solidified-type adhesive composition for optics and a solidified layer and an optical component thereof, which is capable of solving the problems that are found in the previous adhesive used in an optical component with multi-layer structure formed by sticking various materials, wherein the use of the ultraviolet light solidified-type adhesive composition for optics is characterized in that the ultraviolet light solidified-type adhesive composition comprises polyfunctional polyurethane (methyl) acrylate (A) obtained by the reaction between hydrogenated polybutadiene polyol, aliphatic series polyisocyanate and acrylate with isocyanate group (methyl), at least one of polyurethane (B1) and hydrogenated polybutadiene polyol (B2) that are obtained through the reaction between hydrogenated polybutadiene polyol and aliphatic series polyisocyanate,single-function (methyl) acrylate (C) with more than 8 carbon atoms of alkyl, and photoplymerization initiator (D); the solvent content is less than 1 weight percent; the viscosity under 25 DEG is with the range of 100 to 10000 mPa s; and the Gardner chroma is less than 1.

The invention discloses hydrogenated styrene-modified dicyclopentadiene petroleum resin and a preparation method thereof, and belongs to the technical field of petrochemical engineering. The hydrogenated styrene-modified dicyclopentadiene petroleum resin disclosed by the invention has a softening point of 90-130 DEG C, a Gardner chromaticity of 0-1, a weight-average molecular weight of 400-1000 and a molecular weight distribution index of 1.5-2.5. A method for preparing the hydrogenated styrene-modified dicyclopentadiene petroleum resin disclosed by the invention comprises the following steps: reaction raw material mixing, reaction raw material thermal polymerization reaction, purification and hydrogenation reaction. According to the method disclosed by the invention, a high-purity cyclopentadiene monomer and a styrene monomer are used as raw materials and mixed, and the various process parameters of the thermal polymerization reaction are strictly controlled by adjusting the proportion of the various components, thus the occurrence of cross-linking during the thermal polymerization process can be prevented, and favourable conditions are provided for the subsequent hydrogenation reaction, so that the performances of solubility, chromaticity, stability and the like of the hydrogenated resin are remarkably improved.

The invention discloses a method for synthetizing a hydrogenated bisphenol A epoxy resin under the catalysis of ammonium salt. According to the method, epihalohydrin such as hydrogenated bisphenol A, epichlorohydrin and the like are taken as raw materials, simultaneously, an ammonium salt catalyst and alkali are added, a ring-opening etherification reaction is performed at the temperature of 30 DEG C-100DEG C, and halogen alcohol ether is obtained; then, the alkali is continuously added in the same reaction system, and a ring-closing epoxidation reaction is performed at the temperature of 20 DEG C-80 DEG C; and the hydrogenated bisphenol A epoxy resin is obtained through posttreatment processes such as filtering, washing, separation, reduced pressure distillation and the like. A product is measured to be superior to number one with a GB-T12007.1-1989 epoxy resin color measuring method-Gardner colorimetric method.

The invention provides a bimaleimide composition, and a preparation method and an application thereof. The composition comprises a compound of formula I, a compound of formula II and a compound of formula III. The invention also provides the preparation method of the bimaleimide composition. The bimaleimide composition has a high heatproof property, the Gardner color scale of a heatproof resin product made from the composition reaches 14# to 18#, the heatproof property of the heatproof resin composition is obviously higher than that of bimaleimide prepared through general technologies and commercial resin products, the foaming tolerance duration in tin immersion experiments reaches up to 19-24 min, and is far higher than that of common products, and the bimaleimide composition has the advantages of excellent heatproof property, high application values and good application prospect.

Rosin esters are provided. The rosin esters can exhibit improved color (e.g., the rosin ester can have a neat Gardner color of 8.5 or less), improved oxidative stability (e.g., when 1000 ppm or less of an antioxidant is present in combination with the rosin ester, the rosin ester can exhibit an oxidative-induction time at 130 DEG C of at least 75 minutes), improved color stability (e.g., the rosin ester can exhibit less than a 10% change in neat Gardner color when heated to a temperature of 160 DEG C for a period of three hours), or combinations thereof. Also provided polymeric compositions comprising the rosin esters, as well as methods of making the rosin esters.

The present invention discloses high-solid-content low-softening-point light-colored liquid terpene resin. The resin has a structure shown in a general formula (I), wherein n is an integer, and the value range of n satisfies a relationship of 2<=n<=5. The present invention also discloses a preparation method and application of the liquid terpene resin. The liquid terpene resin provided by the present invention has a solid content of 99% or more, a color (solid Gardner color scale) of less than a No.3 color and a softening point of less than 28 DEG C, can be used as a non-solvent type lubricantto be directly used in glass fibers to replace a paraffin latex liquid, can also be used as a liquid component of a tackifying emulsion to replace a low-molecular organic solvent or mineral oil, andis used as tackifying resin to be directly applied to a low-temperature-resistant adhesive.

Rosin esters are provided. The rosin esters can exhibit improved color (e.g., the rosin ester can have a neat Gardner color of 4 or less), improved oxidative stability (e.g., when 1000 ppm or less of an antioxidant is present in combination with the rosin ester, the rosin ester can exhibit an oxidative-induction time at 130 DEG C of at least 30 minutes), improved color stability (e.g., the rosin ester can retain a neat Gardner color of 5 or less when heated to a temperature of 160 DEG C for a period of three hours), or combinations thereof. The invention also provides polymeric compositions comprising the rosin esters, as well as methods of making the rosin esters.

Provided herein are methods of making rosin esters. The methods can involve contacting a rosin ester with a microporous adsorbent. Treatment with a microporous adsorbent, such as an activated carbon, can improve the color of the rosin ester (e.g., reduce the neat Gardner color of the rosin ester by at least 1 Gardner color unit), reduce the concentration of sulfur in the rosin ester (e.g., reduce the concentration of sulfur in the rosin ester by at least 50 ppm), or combinations thereof. Rosin esters prepared by the methods described herein, as well as methods of using thereof, are also described.

Provided are a modified hydrocarbon resin that can provide a hot-melt adhesive composition with low odor, low Gardner color and high peel adhesion, a method for producing the resin, and the hot-melt adhesive composition. A modified hydrocarbon resin comprising a 1,3-pentadiene monomer unit, a C4-C6 alicyclic monoolefin monomer unit, a C4-C8 acyclic monoolefin monomer unit, an alicyclic diolefin monomer unit, and an aromatic monoolefin monomer unit, and containing a carboxyl group or acid anhydride group, wherein a weight average molecular weight (Mw), a Z average molecular weight (Mz), a ratio (Mz/Mw), a Gardner color scale of a 50 mass % toluene solution, a softening point, and an acid value are in specific ranges.

The invention provides a method for decoloring and modifying lacquer wood wax and belongs to the technical field of farming materials. In the method, the lacquer wood wax serving as a raw material is irradiated by ultraviolet light with wavelength of 200 to 400nm under proper lighting intensity and at proper time to be effectively decolored; under the photo initiating condition of using benzophenone, the decoloring effect of the lacquer wood wax is further improved; under the condition of adding a proper amount of soybean oil, the lacquer wood wax is decolored and flexibility is increased at the same time; the lighting intensity is 1*10<4> to 1*10<6>Lux; the lighting time is 5 to 20 minutes; the used benzophenone is in an amount which is 0.05 to 1.0 percent based on the mass of the lacquer wood wax; the used soybean oil is in an amount which is 1 to 20 percent based on the mass of the lacquer wood wax; the Gardner color scale is reduced from No. 8 to No.5; the flexibility is effectively improved, and the needle penetration is improved from 40 DEG C to 50 DEG C. The method is low in cost, high in efficiency, and easy to implement; and by the method, the lacquer wood wax is effectively decolored and modified, the application field of the lacquer wood wax is widened and the application level of the lacquer wood wax is improved.

An object of the present invention is to provide an aliphatic amine alkylene oxide adduct which has a satisfactory color when used as a detergent, has a sufficiently sharp molecular weight distribution, and is highly pure and less odorous. The present invention is an aliphatic amine alkylene oxide adduct formed by adding m pieces of (A¹O) and n pieces of (A²O) [wherein A¹O and A²O each independently represent an oxyethylene group and/or an oxypropylene group] to an ethylene oxide 2-mole adduct of a primary amine having a saturated or unsaturated hydrocarbon group having 4 to 24 carbon atoms, the aliphatic amine alkylene oxide adduct having a color which, as expressed by the Gardner color scale, satisfies the following expression (1) or (2):

In the case where 1≦m+n≦15 Gardner color scale≦0.5×(m+n+2)−1.5  (1)

In the case where 15<m+n≦100 Gardner color scale≦6  (2)