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CN-121991509-A - Silica gel protective glove and preparation method thereof

CN121991509ACN 121991509 ACN121991509 ACN 121991509ACN-121991509-A

Abstract

The invention provides a silica gel protective glove and a preparation method thereof, wherein the silica gel of the silica gel protective glove comprises, by weight, 75-85 parts of a basic silica gel material, 15-25 parts of a cross-linking agent, 8-12 parts of a catalyst, 0.3-1 part of a reaction inhibitor and 20-40 parts of a reinforcing filler. The invention adopts alpha, omega-dihydroxyl polydimethylsiloxane with the basic viscosity of 6000-8000mm 2 /s as basic silica gel, and organic siloxane containing more than three Si-H bonds as a cross-linking agent, and then the curing time of the silica gel prepared by mixing with a platinum-vinyl siloxane complex catalyst, a reaction inhibitor and a reinforcing filler at normal temperature can reach 3-5 days, and the silica gel protective glove prepared by adopting the silica gel also has better heat resistance (the heat resistance grade can reach 2 levels), wear resistance (the wear resistance grade can reach 2-3 levels) and cutting resistance (the cutting resistance grade can reach 2 levels).

Inventors

  • JIANG TAO
  • MA LIGUO
  • YIN GUOSHUAI
  • SHA YAN
  • SHA XIAOLIN

Assignees

  • 南通强生新材料科技股份有限公司

Dates

Publication Date
20260508
Application Date
20241106

Claims (10)

  1. 1. The silica gel capable of being stored for a long time is characterized by comprising the following components in parts by weight:
  2. 2. the long shelf life silica gel of claim 1 wherein said base silicone gum is an α, ω -dihydroxy polydimethylsiloxane; The basic viscosity of the basic silicone gum is 6000-8000mm 2 /s, and can be adjusted by adding a diluent.
  3. 3. The long-term storable silica gel of claim 1 wherein said cross-linking agent is an organosiloxane containing three or more Si-H bonds having the structural formula Me 3 Si.(MeHSiO) n .SiMe 3 .
  4. 4. The long shelf life silica gel of claim 1 wherein said catalyst is a platinum-vinyl siloxane complex.
  5. 5. The long shelf life silica gel of claim 5 wherein said catalyst is a complex of platinum with 1, 3-divinyl tetramethyl disiloxane and/or 1,3,5, 7-tetravinyl-1, 3,5, 7-tetramethyl cyclotetrasiloxane.
  6. 6. The silica gel according to claim 1, wherein the reaction inhibitor is at least one of alkynol compounds, amide compounds and maleate compounds; Wherein the alkynol compound is at least one selected from the group consisting of ethynyl alcohol, propynylalcohol and phenylacetylene alcohol; The amide compound is at least one selected from formamide, acetamide and carbamide; The maleate compound is at least one selected from dibutyl maleate, diethyl ethyl maleate, monomethyl maleate and diallyl maleate.
  7. 7. The silica gel according to claim 1, wherein the reinforcing filler is at least one of white carbon black, silica powder, alumina, iron oxide, titanium dioxide, and silicone resin.
  8. 8. A method for preparing a silica gel capable of being stored for a long time according to any one of claims 1 to 7, comprising the steps of: S1, mixing basic silica gel material and a catalyst according to the weight parts of the components, stirring for 1-1.5h at normal temperature, then adding a reaction inhibitor, and continuously stirring for 30-45min to obtain a pre-reaction body A; S2, stirring the pre-reaction body A at 20-27 ℃, slowly dropwise adding the cross-linking agent until the cross-linking agent is completely added, stirring for 1-2 hours, adding the reinforcing material, stirring and mixing completely, and vacuumizing to obtain the silica gel capable of being stored for a long time.
  9. 9. Use of a long-storable silica gel according to any one of claims 1 to 7 or a long-storable silica gel prepared according to the method of claim 8 for the preparation of a silica gel protective glove.
  10. 10. The preparation method of the silica gel protective glove is characterized by comprising the following steps of: After preheating a hand mould sleeved with a glove core, dipping the silica gel which can be stored for a long time according to any one of claims 1-7 or prepared according to the method of claim 8, spraying the silica gel, shaking and throwing the slurry, and drying to obtain the silica gel protective glove.

Description

Silica gel protective glove and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a silica gel protective glove and a preparation method thereof. Background The silica gel is mainly connected with methyl, has the advantages of spiral molecular structure, good biocompatibility, no color and smell, excellent electrical insulation, excellent high temperature resistance, fire resistance and the like, and is widely applied to the fields of aviation, aerospace, engineering machinery, automobiles, spraying, electronic products, household appliances, kitchen products, medical products, wires and cables, sealing elements, insulating products, children toys and the like. Because the viscosity of the silica gel is very high, the dilution technology difficulty is high, the parking time of the silica gel after being proportioned at normal temperature is only about four hours, the temperature is increased, the parking and curing time can only need a few minutes, and the silica gel is very difficult to apply to protective gloves. Patent document CN103923466a describes a method for producing a silicone glove and a polyorganosiloxane mixed solution, which describes that the produced polyorganosiloxane mixed solution can form a silicone coating on a glove liner by dipping or showering, and the silicone glove produced by showering has the effects of flexibility, comfort and water resistance, and has the effects of high adhesive strength and difficult peeling when producing a lined silicone glove. However, the time for parking the polyorganosiloxane mixed solution prepared by the method is only a few hours at normal temperature, and the requirement of long-time parking is still not met. Disclosure of Invention Aiming at the defect of short parking time of the silica gel slurry in the traditional silica gel glove, the invention aims to provide the silica gel protective glove and the preparation method thereof. According to the silica gel method, the silica gel adopted by the glove is used for protecting the tail end of one active group (alpha, omega-dihydroxypolydimethylsiloxane) in the silica gel by blocking through the reaction inhibitor to prevent the active group from solidifying, so that the reaction speed is slowed down, the solidifying time of the silica gel can be prolonged to 4-5 days, the viscosity is not changed, and the silica gel stored for a long time can be applied to the glove, and the preparation of the silica gel glove is realized. The invention aims at realizing the following technical scheme: in a first aspect, the invention provides a silica gel capable of being stored for a long time, which comprises the following components in parts by weight: Preferably, the base silicone gum is an alpha, omega-dihydroxy polydimethylsiloxane. Preferably, the base silicone gum has a base viscosity of 6000 to 8000mm 2/s (measured at 25 ℃) and is adjustable by the addition of a diluent. Preferably, the diluent is at least one selected from ethanol, propylene glycol, polytetrafluoroethylene and triphenyl phosphate. Through early test screening, the thinner of the specific type can achieve better dilution effect and prolong the storage time of the silica gel. As a further preferred embodiment, the diluent is a mixture of propylene glycol and polytetrafluoroethylene. Preferably, the cross-linking agent is an organosiloxane containing more than three Si-H bonds, and the structural formula is C 3H9OSi.(CH4OSi)n.C3H9 Si. In particular to polydimethylsiloxane with high hydrogen content. Preferably, the catalyst is a platinum-vinyl siloxane complex. Preferably, the catalyst is a complex of platinum and 1, 3-divinyl tetramethyl disiloxane and/or 1,3,5, 7-tetravinyl-1, 3,5, 7-tetramethyl cyclotetrasiloxane. Preferably, the mass ratio of the platinum to the 1, 3-divinyl tetramethyl disiloxane and/or the 1,3,5, 7-tetravinyl-1, 3,5, 7-tetramethyl cyclotetrasiloxane is 1-3:5-8. The complex prepared by the mass ratio can further improve the performance of the prepared silica gel. Preferably, the reaction inhibitor is at least one of alkynol compounds, amide compounds and maleate compounds. Preferably, the alkynol compound is at least one selected from the group consisting of ethynyl alcohol, propynylalcohol and phenethyl alkynol. Preferably, the amide compound is at least one selected from formamide, acetamide and carbamide. Preferably, the maleate compound is at least one selected from dibutyl maleate, diethyl ethyl maleate, monomethyl maleate and diallyl maleate. As a further preferable scheme, the reaction inhibitor is at least one of amide compounds and maleate compounds. The amide compounds and the maleate compounds are used as reaction inhibitors, so that the performance of the prepared silica gel can be further improved. As a preferable scheme, the reinforcing filler is at least one of white carbon black, quartz powder, aluminum oxide, ferric oxide, t