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CN-117702498-B - Organic silicon synthetic leather and preparation process thereof

CN117702498BCN 117702498 BCN117702498 BCN 117702498BCN-117702498-B

Abstract

The invention discloses organic silicon synthetic leather and a preparation process thereof, and belongs to the field of organic silicon synthetic leather. The synthetic leather comprises base cloth, wherein a primer layer is arranged on the base cloth, and a top adhesive layer is arranged on the primer layer, wherein vinyl silicone oil, modified hydrophobic white carbon black, phenyl vinyl silicone resin, hydrogen-containing silicone oil, an inhibitor and a catalyst are uniformly mixed on the top adhesive layer and the primer layer in vacuum. The preparation method comprises the steps of firstly coating a surface adhesive layer on release paper, heating and curing, then coating a bottom adhesive layer on the surface of the surface adhesive layer, attaching base cloth to the bottom adhesive layer, heating and curing, and lifting the release paper to obtain the organic silicon leather. The organic silicon synthetic leather has the advantages of wear resistance, folding resistance, tearing resistance and the like.

Inventors

  • LI SHUBING
  • FENG XIANJIE
  • BI SHIMING

Assignees

  • 湖北兴瑞硅材料有限公司

Dates

Publication Date
20260508
Application Date
20231201

Claims (10)

  1. 1. The organic silicon synthetic leather is characterized by comprising base cloth, wherein a primer layer is arranged on the base cloth, a top adhesive layer is arranged on the primer layer, the top adhesive layer comprises, by weight, 150-300 parts of vinyl silicone oil, 10-40 parts of modified hydrophobic white carbon black, 50-200 parts of phenyl vinyl silicone resin, 5-30 parts of hydrogen-containing silicone oil, 0.3-1.5 parts of inhibitor and 1-10 parts of catalyst, the silicon-hydrogen ratio of the top adhesive layer is 2.5-4.5, the primer layer comprises, by weight, 100-200 parts of vinyl silicone oil, 5-30 parts of modified hydrophobic white carbon black, 10-100 parts of phenyl vinyl silicone resin, 2-15 parts of hydrogen-containing silicone oil, 0.2-1 part of inhibitor and 0.5-10 parts of catalyst, and the silicon-hydrogen ratio of the primer layer is 6-8.
  2. 2. The synthetic organosilicon leather of claim 1, wherein the vinyl silicone oil has a vinyl content of 0.1-1.5wt% and a viscosity of 500-15000mPa.s.
  3. 3. The synthetic organosilicon leather of claim 1, wherein the hydrogen content of the hydrogen-containing silicone oil is 0.3-1wt% and the viscosity is 30-200 mPa.s.
  4. 4. The synthetic silicone leather according to claim 1, wherein the vinyl content of the phenyl vinyl silicone resin is 0.5-2wt% and the viscosity is 2000-80000 mPa.s.
  5. 5. The synthetic organic leather according to claim 1, wherein the inhibitor is ethylene cyclic alcohol or an acetylene cyclic alcohol compound.
  6. 6. The synthetic organosilicon leather of claim 1, wherein the catalyst is platinum catalyst, platinum-vinyl complex or platinum-alkyne based complex.
  7. 7. The organic silicon synthetic leather according to any one of claims 1 to 6, wherein 1 to 5 parts of color paste is added to the primer layer and the top adhesive layer according to the requirement.
  8. 8. The process for preparing the organic silicon synthetic leather according to any one of claims 1 to 7, which is characterized by comprising the following steps: s1, respectively mixing a face adhesive layer raw material and a base adhesive layer raw material to prepare face adhesive layer slurry and base adhesive layer slurry; s2, coating the surface adhesive layer slurry on release paper, and heating and curing; and S3, uniformly coating primer layer sizing agent on the surface of the surface adhesive layer obtained in the step S2, attaching the base cloth to the primer layer, and heating and curing to obtain the organic silicon synthetic leather.
  9. 9. The process of claim 8 wherein the step S1 is carried out by mixing vinyl silicone oil, modified hydrophobic white carbon black, phenyl vinyl silicone resin and hydrogen-containing silicone oil in raw materials under vacuum, adding inhibitor, adding into color paste, vacuum mixing, and adding into catalyst.
  10. 10. The process according to claim 8 or 9, wherein the temperature of the heat curing is 100-130 ℃ for 3-10 minutes.

Description

Organic silicon synthetic leather and preparation process thereof Technical Field The invention belongs to the technical field of organic silicon synthetic leather, and particularly relates to efficient, environment-friendly, wear-resistant and fold-resistant organic silicon synthetic leather and a preparation process thereof. Background The organic silicon leather is novel environment-friendly leather, adopts silica gel as a raw material, is combined with base materials such as superfine fibers, non-woven fabrics and the like, is processed and prepared, and is suitable for various industries. CN115595800a discloses an adsorption-resistant wear-resistant scratch-resistant organic silicon leather, but the process is complex, the raw materials are numerous, the viscosity, hardness, elongation at break and the like of the basic indexes are not disclosed, CN114058276a discloses a solvent-free, high-folding-resistant and high-wear-resistant organic silicon leather preparation method, the prepared organic silicon leather is reinforced by preparing methacryloxy MQ resin, and the resin synthesis steps are complicated, industrial mass production cannot be realized, so that the industrialization of the prepared organic silicon leather is hindered to a certain extent. Disclosure of Invention The invention provides an organic silicon synthetic leather and a preparation process thereof, the prepared organic silicon synthetic leather has the characteristics of wear resistance, folding resistance, tearing resistance and the like. The organic silicon synthetic leather comprises a base cloth, wherein a primer layer is arranged on the base cloth, a top adhesive layer is arranged on the primer layer, the top adhesive layer comprises, by weight, 150-300 parts of vinyl silicone oil, 10-40 parts of modified hydrophobic silica gel, 50-200 parts of phenyl vinyl silicone resin, 5-30 parts of hydrogen-containing silicone oil, 0.3-1.5 parts of inhibitor and 1-10 parts of catalyst, the silicon-hydrogen ratio of the top adhesive layer is 2.5-4.5, the primer layer comprises, by weight, 100-200 parts of vinyl silicone oil, 5-30 parts of modified hydrophobic silica gel, 10-100 parts of phenyl vinyl silicone resin, 2-15 parts of hydrogen-containing silicone oil, 0.5-10 parts of inhibitor and 6-8. Further, the vinyl silicone oil has a vinyl content of 0.1 to 1.5wt% and a viscosity of 500 to 15000mpa.s. Further, the hydrogen content of the hydrogen-containing silicone oil is 0.3-1wt% and the viscosity is 30-200 mPa.s. Further, the vinyl content of the phenyl vinyl silicone resin is 0.5-2wt% and the viscosity is 2000-80000 mPa.s. Further, the inhibitor is an ethylene cyclic alcohol or an acetylene cyclic alcohol compound. Further, the catalyst is a platinum catalyst, a platinum-vinyl complex or a platinum-alkyne-based complex. Further, 1-5 parts of color paste is added into the primer layer according to the requirement. The invention also relates to a preparation method of the organic silicon synthetic leather, which comprises the following steps: s1, respectively mixing a face adhesive layer raw material and a base adhesive layer raw material to prepare face adhesive layer slurry and base adhesive layer slurry; s2, coating the surface adhesive layer slurry on release paper, and heating and curing; and S3, uniformly coating primer layer sizing agent on the surface of the surface adhesive layer obtained in the step S2, attaching the base cloth to the primer layer, and heating and curing to obtain the organic silicon synthetic leather. Further, when the sizing agent of the surface adhesive layer or the sizing agent of the bottom adhesive layer in the S1 is prepared, vinyl silicone oil, modified hydrophobic white carbon black, phenyl vinyl silicone resin and hydrogen-containing silicone oil in raw materials are uniformly mixed under vacuum, an inhibitor is added, color paste is added according to the requirement, the mixture is uniformly mixed under vacuum, and finally a catalyst is added, and the mixture is uniformly mixed under vacuum, so that the adhesive is obtained. Further, the temperature of the heating curing is 100-130 ℃ and the time is 3-10min. The invention has the following beneficial effects: according to the invention, vinyl silicone oil and phenyl vinyl silicone resin are used as main raw materials, wherein the phenyl vinyl silicone resin has good compatibility with silicone rubber, the influence on the viscosity of liquid silicone rubber is small, compared with the traditional vinyl MQ resin, the phenyl vinyl silicone resin has large steric hindrance on the molecular chain due to the existence of phenyl, the competition reaction active site with hydrogen-containing silicone oil is greatly reduced, side reaction and competition reaction are reduced, through the collocation of the phenyl vinyl silicone resin and white carbon black, the vinyl in the phenyl vinyl silicone resin and the silicon hydrogen bond undergo a crosslinking rea