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Flame-retardant silica gel pressure-sensitive adhesive, preparation method and adhesive tape

A flame-retardant silica gel and pressure-sensitive adhesive technology, which is applied in the direction of pressure-sensitive films/sheets, adhesives, film/sheet-shaped adhesives, etc., can solve problems such as low safety, environmental pollution by-products, and few varieties, and achieve High peel force, halogen free, modulus improvement effect

Pending Publication Date: 2022-04-15
SUZHOU SIDIKE NEW MATERIALS SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few varieties of flame-retardant organic adhesives in China. Most of the flame-retardant products in the existing adhesive tapes are halogen flame-retardant, and the by-products pollute the environment and have low safety.

Method used

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  • Flame-retardant silica gel pressure-sensitive adhesive, preparation method and adhesive tape
  • Flame-retardant silica gel pressure-sensitive adhesive, preparation method and adhesive tape
  • Flame-retardant silica gel pressure-sensitive adhesive, preparation method and adhesive tape

Examples

Experimental program
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Effect test

preparation example Construction

[0039] The present invention also provides a method for preparing a flame-retardant silicone pressure-sensitive adhesive as described above, such as figure 2 shown, including the following steps:

[0040] S1. Take a certain amount of solvent to dissolve methylphenylvinyl silicon raw rubber to obtain a raw rubber solution;

[0041] S2, blowing nitrogen, sequentially adding the remaining solvent, methyl polysiloxane resin, and the raw rubber dissolving solution prepared in step S1 into the reaction vessel, heating and dissolving to obtain a mixed solution;

[0042] S3, adding an organotin condensation catalyst to the mixed solution prepared in step S2, heating, stirring, and heat preservation reaction;

[0043] S4, adding a crosslinking agent to the reaction solution in step S3, stirring, and reacting to obtain a glue;

[0044] S5. Add an intumescent flame retardant to the glue in step S4, stir, and cool after reaction to obtain a flame-retardant silicone pressure-sensitive a...

Embodiment 1

[0058] The invention provides an adhesive tape, which sequentially includes a release film layer 10, a flame-retardant silicone pressure-sensitive adhesive layer 20, a primer layer 30, and a flame-retardant substrate 40; wherein, the release film layer 10 is a transparent fluorine release film layer , with a thickness of 50 μm; the flame-retardant silicone pressure-sensitive adhesive layer 20 is 20 μm thick; the primer layer 30 is a silicone layer with a thickness of 0.9 μm; 20 is coated and cured with flame-retardant silicone pressure-sensitive adhesive; the flame-retardant silicone pressure-sensitive adhesive includes the following raw materials in parts by weight:

[0059]

[0060] Among them, the molecular weight of methyl phenyl vinyl silicone raw rubber is 600,000, the phenyl content in methyl phenyl vinyl silicone raw rubber is 8%, and the vinyl content is 4%; both ends of the methyl polysiloxane resin molecular chain All have a methyl group, and its molecular weight...

Embodiment 2

[0068] The present invention provides an adhesive tape, which is different from Example 1 in that the flame-retardant silicone pressure-sensitive adhesive layer 20 is coated with flame-retardant silicone pressure-sensitive adhesive and includes the following raw materials in parts by weight:

[0069]

[0070] When preparing the flame-retardant silicone pressure-sensitive adhesive, 210 parts of xylene was used to dissolve the methylphenylvinyl silicone raw rubber. All the other preparation processes are the same as in Example 1.

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Abstract

The invention provides a flame-retardant silica gel pressure-sensitive adhesive. The flame-retardant silica gel pressure-sensitive adhesive comprises the following raw materials in parts by weight: 100-120 parts of methyl phenyl vinyl silicone rubber; 120 to 180 parts of methyl polysiloxane resin; 20 to 50 parts of a flame retardant; 2-4 parts of an organic tin condensation catalyst; 1-2 parts of a cross-linking agent; and 250 to 300 parts of a solvent. The invention also provides a preparation method and an adhesive tape. The intumescent flame retardant is used for enabling the flame-retardant silica gel pressure-sensitive adhesive to have flame-retardant performance and to be environment-friendly. The methyl phenyl vinyl silicone rubber is adopted to introduce phenyl into the flame-retardant silica gel pressure-sensitive adhesive, so that the flame-retardant property of the flame-retardant silica gel pressure-sensitive adhesive is improved; the methyl polysiloxane resin is adopted to improve the modulus of the flame-retardant silica gel pressure-sensitive adhesive, so that the viscosity of the flame-retardant silica gel pressure-sensitive adhesive is improved. By limiting the dosage of the methyl phenyl vinyl silicon and the methyl polysiloxane resin, the prepared flame-retardant silica gel pressure-sensitive adhesive has low initial viscosity and high holding power. The flame-retardant silica gel pressure-sensitive adhesive is used for preparing an adhesive tape, and the prepared adhesive tape has the advantages of high temperature resistance, low initial adhesion, high persistent adhesion, high stripping force and high flame retardance.

Description

technical field [0001] The invention belongs to the technical field of silica gel materials, and in particular relates to a flame-retardant silica gel pressure-sensitive adhesive, a preparation method and an adhesive tape. Background technique [0002] With the rapid development of the industry, the existing adhesive tapes on the market meet some of people's needs to a certain extent, and are used more and more in electronic component systems in the fields of automobiles, household appliances, toy accessories, communications, aviation, and aerospace. Environmentally friendly tapes, especially in the aviation and aerospace fields, have higher requirements for tapes and require flame retardant requirements. The so-called flame retardant is non-combustible in case of fire and self-extinguishing when away from fire. The purpose can be achieved by adding appropriate flame retardants. At present, there are few varieties of flame-retardant organic adhesives in China. Most of the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J183/07C09J11/04C09J11/06C09J7/38C09J7/50C09J7/25
CPCC09J183/04C09J11/04C09J11/06C09J7/38C09J7/50C09J7/25C08L2201/02C08K2003/323C09J2301/122C09J2301/302C09J2301/408C09J2479/086C09J2483/00C09J2483/003C08L83/04C08K3/32C08K5/14
Inventor 金闯施广用包静炎张熠
Owner SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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