Patents by Inventor Guofang TANG

Guofang TANG has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230045615
    Abstract: Provided are a thermosetting epoxy resin composition and a prepreg, laminated board and printed circuit board using the thermosetting epoxy resin composition. The thermosetting epoxy resin composition comprises the following components in parts by weight: 2-10 parts of a phosphorus-containing anhydride, 5-40 parts of a phosphorus-free anhydride, 5-45 parts of an epoxy resin, 40-70 parts of a filler, and 0-15 parts of a phosphorus-containing flame retardant, with the total part by weight of all these components being 100 parts, wherein the phosphorus-containing anhydride has a structure as represented by formula I or II, and the epoxy resin is selected from one of or a combination of at least two of a bisphenol A epoxy resin, a bisphenol F epoxy resin and a biphenyl epoxy resin.
    Type: Application
    Filed: March 31, 2020
    Publication date: February 9, 2023
    Inventors: Yong CHEN, Yongjing XU, Guofang TANG
  • Publication number: 20200062889
    Abstract: Provided in the present invention is a thermosetting resin composition, comprising phosphorus-containing active ester and epoxy resin, the phosphorus-containing active ester being copolymerised using bis-aromatic formyl chloride hydrocarbyl phosphine oxide and one of bis-hydroxyl aromatic hydrocarbyl phosphine oxide, bis-hydroxyl aromatic oxyhydrocarbyl phosphine oxide, or hydroxylated DOPO, and then obtained from aromatic formyl chloride end capping; the thermosetting resin composition provided in the present invention has the advantages of good thermal stability, humidity resistance and heat resistance, a low dielectric constant and dielectric loss tangent, a low rate of water absorption, and halogen-free flame-retardant properties, and has excellent machinability; also provided in the present invention are applications of the thermosetting resin composition for resin sheet material, resin composite metal foil, prepreg, laminated plate, metal foil-clad laminated plate, and printed circuit boards.
    Type: Application
    Filed: February 21, 2017
    Publication date: February 27, 2020
    Inventors: Cheng LUO, Guofang TANG, Jiangling ZHANG
  • Patent number: 10414136
    Abstract: Provided are a halogen-free phosphorus-free silicon resin composition, and prepreg and laminated board using the same, and printed circuit board, the silicon resin composition comprising the following components in parts by solid weight: 50-90 parts of an organic silicon resin, 20-80 parts of a vinyl-terminated silicon oil, 0.1-5 parts of a viscosity enhancing agent, 0-60 parts of a filler, 0.0001-0.5 parts of a catalyst, and 0.00001-0.1 parts of an inhibitor, a mole ratio between Si—H in a cross-linking agent and Si-Vi in the organic silicon resin being 1.0-1.7. The resin body of the resin composition is a thermosetting silicon resin, and the laminated board prepared thereby has good heat and flame resistance and an extremely low dielectric constant (Dk) and dielectric loss (Df).
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: September 17, 2019
    Assignee: Shengyi Technology Co., Ltd.
    Inventors: Xiaosheng Su, Suwen Ye, Guofang Tang
  • Patent number: 10336905
    Abstract: Provided are an organic silicon resin composition, prepreg and laminate using the same. The organic silicon resin composition glue solution contains a condensation silicon resin, a catalyst, an auxiliary agent, a white filler and a solvent as necessary components, and is impregnated in a reinforced material such as a sheet-like fiberglass fiber base material and then dried to prepare the prepreg. The prepreg has a net structure via crosslinking of the silicon resin using a condensation reaction. Since the organic silicon resin has ultrahigh heat resistance and yellowing resistance, the present invention applies the silicon resin to a white LED copper-clad laminate instead of a traditional organic resin, satisfying the demand for high heat resistance, and replacing the ceramic substrate to be a new heat-dissipating substrate base material.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: July 2, 2019
    Assignee: SHENGYI TECHNOLOGY CO., LTD.
    Inventors: Guofang Tang, Suwen Ye, Peng Sun
  • Patent number: 10308808
    Abstract: The present invention relates to an organic silicone resin composition and a prepreg, a laminate, and an aluminum substrate that use the composition. The organic silicone resin composition comprises in terms of parts by weight: 100 parts of a condensation-type silicone resin, 0.0001-2 parts of a catalyst, and 0.001-10 parts of an additive. The organic silicone resin composition has the advantages of high heat resistance, halogen-free and phosphorus-free flame retardancy, improved peel strength with copper foil, and low coefficient of expansion, and is applicable in manufacturing the pre-preg, the laminate, and the aluminum substrate for used in a high-performance printed circuit.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: June 4, 2019
    Assignee: SHENGYI TECHNOLOGY CO., LTD.
    Inventors: Suwen Ye, Guofang Tang
  • Publication number: 20180370189
    Abstract: The present invention relates to an organic silicone resin aluminum base copper clad laminate and preparation method thereof. The aluminum base copper clad laminate comprises sequentially a copper foil layer, an insulation layer and an aluminum plate layer, wherein, the insulation layer is prepared from an organic silicone resin composition, and the organic silicone resin composition comprises the following components in parts by weight: 100 parts of an organic silicone resin, 40-100 parts of a vinyl-terminated silicone oil, 0.0001-0.5 parts of a catalyst, and 0.00001-0.1 parts of an inhibitor. By adopting an organic silicone resin as a substrate polymer, the electrical insulation and heat resistance functions of the aluminum base copper clad laminate are improved. Moreover, the vinyl-terminated silicone oil as reactive diluent can effectively reduce brittleness of a silicone resin, improving the toughness of the organic silicone resin composition.
    Type: Application
    Filed: November 18, 2015
    Publication date: December 27, 2018
    Applicant: Shengyi Technology Co., Ltd.
    Inventors: Guofang TANG, Suwen YE
  • Patent number: 10030143
    Abstract: The present invention relates to a ceramized silicone resin composition and a pre-preg and a laminate that use the composition. The ceramized silicone resin composition comprises: 50-100 parts of a condensation-type silicone resin, 0.0001-2 parts of a catalyst, 5-80 parts of a ceramic-forming filler, and 0.01-50 parts of a flux. The pre-preg and the laminate manufactured using the ceramized silicone resin composition, when used in a sustained high temperature, can transform into complex ceramized structure thereby providing ceramic properties, thus providing great fireproof and flame retardant effects; also, manufacturing of the laminate is similar to that of a regular FR-4 laminate, where the process is easy to operate.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: July 24, 2018
    Assignee: SHENGYI TECHNOLOGY CO., LTD.
    Inventors: Suwen Ye, Guofang Tang
  • Publication number: 20180050515
    Abstract: The present invention provides an active ester, a thermosetting resin composition, a prepreg and a laminated board containing same. The active ester is a PPO main chain-containing double-ended polyfunctional active ester, and the thermosetting resin composition comprises epoxy resin and the PPO main chain-containing double-ended polyfunctional active ester. The prepreg, laminated board and copper-clad plate prepared from the thermosetting resin composition containing the PPO main chain-containing double-ended polyfunctional active ester have excellent dielectric properties, damp-heat resistance, heat resistance, extremely low water absorption and high bending strength.
    Type: Application
    Filed: September 21, 2015
    Publication date: February 22, 2018
    Inventors: Cheng LUO, Guofang TANG
  • Publication number: 20180016436
    Abstract: Provided are an organic silicon resin composition, prepreg and laminate using the same. The organic silicon resin composition glue solution contains a condensation silicon resin, a catalyst, an auxiliary agent, a white filler and a solvent as necessary components, and is impregnated in a reinforced material such as a sheet-like fiberglass fiber base material and then dried to prepare the prepreg. The prepreg has a net structure via crosslinking of the silicon resin using a condensation reaction. Since the organic silicon resin has ultrahigh heat resistance and yellowing resistance, the present invention applies the silicon resin to a white LED copper-clad laminate instead of a traditional organic resin, satisfying the demand for high heat resistance, and replacing the ceramic substrate to be a new heat-dissipating substrate base material.
    Type: Application
    Filed: June 1, 2015
    Publication date: January 18, 2018
    Inventors: Guofang TANG, Suwen YE, Peng SUN
  • Publication number: 20170355851
    Abstract: The present invention relates to a ceramized silicone resin composition and a pre-preg and a laminate that use the composition. The ceramized silicone resin composition comprises: 50-100 parts of a condensation-type silicone resin, 0.0001-2 parts of a catalyst, 5-80 parts of a ceramic-forming filler, and 0.01-50 parts of a flux. The pre-preg and the laminate manufactured using the ceramized silicone resin composition, when used in a sustained high temperature, can transform into complex ceramized structure thereby providing ceramic properties, thus providing great fireproof and flame retardant effects; also, manufacturing of the laminate is similar to that of a regular FR-4 laminate, where the process is easy to operate.
    Type: Application
    Filed: June 1, 2015
    Publication date: December 14, 2017
    Inventors: Suwen YE, Guofang TANG
  • Publication number: 20170354032
    Abstract: Provided are a halogen-free phosphorus-free silicon resin composition, and prepreg and laminated board using the same, and printed circuit board, the silicon resin composition comprising the following components in parts by solid weight: 50-90 parts of an organic silicon resin, 20-80 parts of a vinyl-terminated silicon oil, 0.1-5 parts of a viscosity enhancing agent, 0-60 parts of a filler, 0.0001-0.5 parts of a catalyst, and 0.00001-0.1 parts of an inhibitor, a mole ratio between Si—H in a cross-linking agent and Si-Vi in the organic silicon resin being 1.0-1.7. The resin body of the resin composition is a thermosetting silicon resin, and the laminated board prepared thereby has good heat and flame resistance and an extremely low dielectric constant (Dk) and dielectric loss (Df).
    Type: Application
    Filed: July 6, 2015
    Publication date: December 7, 2017
    Inventors: Xiaosheng SU, Suwen YE, Guofang TANG
  • Publication number: 20170349750
    Abstract: The present invention relates to an organic silicone resin composition and a prepreg, a laminate, and an aluminum substrate that use the composition. The organic silicone resin composition comprises in terms of parts by weight: 100 parts of a condensation-type silicone resin, 0.0001-2 parts of a catalyst, and 0.001-10 parts of an additive. The organic silicone resin composition has the advantages of high heat resistance, halogen-free and phosphorus-free flame retardancy, improved peel strength with copper foil, and low coefficient of expansion, and is applicable in manufacturing the pre-preg, the laminate, and the aluminum substrate for used in a high-performance printed circuit.
    Type: Application
    Filed: June 1, 2015
    Publication date: December 7, 2017
    Inventors: Suwen YE, Guofang TANG
  • Patent number: 9193858
    Abstract: The present invention discloses a thermoset resin composition including epoxy resin other than brominated epoxy resin, styrene maleic anhydride copolymer and additive-type flame retardant. The thermoset resin composition also includes an active ester. The thermoset resin composition is used to prepare resin sheet, resin coated copper, prepreg, laminate, copper clad laminate and printed wiring board, and so on. Said thermoset resin composition remarkably reduces the probability of delamination for the PCB laminate, and overcomes drawback of the tetrabromobisphenol A to introduce dielectric properties which will deteriorate the system. The obtained resin composition has good thermal stability and moisture-heat resistance, low dielectric constant and dielectric loss angle tangent, and good flame resistance.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 24, 2015
    Assignee: GUANGDONG SHENGYI SCI. TECH CO., LTD.
    Inventors: Minshe Su, Yong Chen, Guofang Tang, Zhongqiang Yang
  • Publication number: 20140107256
    Abstract: The present invention discloses a thermoset resin composition including epoxy resin other than brominated epoxy resin, styrene maleic anhydride copolymer and additive-type flame retardant. The thermoset resin composition also includes an active ester. The thermoset resin composition is used to prepare resin sheet, resin coated copper, prepreg, laminate, copper clad laminate and printed wiring board, and so on. Said thermoset resin composition remarkably reduces the probability of delamination for the PCB laminate, and overcomes drawback of the tetrabromobisphenol A to introduce dielectric properties which will deteriorate the system. The obtained resin composition has good thermal stability and moisture-heat resistance, low dielectric constant and dielectric loss angle tangent, and good flame resistance.
    Type: Application
    Filed: March 14, 2013
    Publication date: April 17, 2014
    Applicant: GUANGDONG SHENGYI SCI. TECH CO., LTD.
    Inventors: Minshe SU, Yong CHEN, Guofang TANG, Zhongqiang YANG