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Organic silicon pressure-sensitive adhesive without pause marks and with high anchoring property, preparation method and application thereof

A silicone pressure-sensitive adhesive and anchoring technology, which is applied in the direction of pressure-sensitive films/sheets, adhesives, polymer adhesive additives, etc., can solve the problem of inability to adjust the softness and hardness of the rubber surface and anchoring properties, and is not suitable for low-temperature platinum vulcanization systems. Increase customer cost and operating steps, etc., to achieve good peel force stability, improved cohesive strength, and stable mechanical properties

Pending Publication Date: 2022-01-21
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current high-end silicone pressure-sensitive adhesives are often protected by a release film such as a fluorine film during the production process. When the release film is peeled off, it is easy to produce a pause mark, which affects the application effect of the customer; and it is usually necessary to add an anchoring agent when using it. To avoid degumming, increase the cost and operation steps of customers, which is not conducive to the use of customers
[0004] Chinese patent CN110184028A discloses a method for synthesizing high-temperature silicone pressure-sensitive adhesives. POSS is used as a functional additive, but it can only improve the stability of the pressure-sensitive adhesive, and the adjustment of the softness and hardness of the rubber surface and anchorage cannot be realized through functional groups. Suitable for low temperature platinum vulcanization system
[0005] Chinese patent CN112322218A discloses a synthesis method of high-temperature silicone pressure-sensitive adhesive, which uses POSS as a functional additive to improve the temperature resistance, but it is only applicable to high-temperature pressure-sensitive adhesive systems of non-MQ resins

Method used

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  • Organic silicon pressure-sensitive adhesive without pause marks and with high anchoring property, preparation method and application thereof
  • Organic silicon pressure-sensitive adhesive without pause marks and with high anchoring property, preparation method and application thereof
  • Organic silicon pressure-sensitive adhesive without pause marks and with high anchoring property, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] POSS: dioxirane hexavinyl cage polysilsesquioxane;

[0055] Methyl vinyl silicone rubber raw rubber: molecular weight 600,000, vinyl mass fraction 0.5%;

[0056] Vinyl MQ silicone resin: the M / Q ratio is 0.7, the mass fraction of vinyl is 1.5%, and the molar mass is 4400g / mol;

[0057] Hydroxy raw rubber: molecular weight 600,000;

[0058] Hydroxy MQ silicone resin: M / Q ratio is 0.7, molar mass is 3000g / mol;

[0059] Silicon-hydrogen crosslinking agent: the viscosity is 100 mPa.s, and the mass fraction of terminal hydrogen groups and side hydrogen groups is 1.6%.

[0060] 1) Add 20g methyl vinyl silicone rubber raw rubber, 10g vinyl MQ silicone resin, 10g hydroxyl raw rubber, 10g hydroxyl MQ silicone resin and 20g toluene, 0.4g POSS, 0.1g ethynyl cyclohexanol inhibitor into the reactor , stir to dissolve;

[0061] 2) Stir with nitrogen gas, after stirring evenly, dilute 0.18g of acetic acid with 20g of toluene and add slowly, then react under reflux dehydration at 1...

Embodiment 2

[0065] POSS: epoxyethyl heptavinyl cage polysilsesquioxane;

[0066] Methyl vinyl silicone rubber raw rubber: molecular weight 700,000, vinyl mass fraction 0.1%;

[0067] Vinyl MQ silicone resin: the M / Q ratio is 0.7, the mass fraction of vinyl is 0.5%, and the molar mass is 4800g / mol;

[0068] Hydroxy raw rubber: molecular weight 700,000;

[0069] Hydroxyl MQ silicone resin: M / Q ratio is 0.7, molar mass is 5000g / mol;

[0070] Silicon-hydrogen crosslinking agent: the viscosity is 100 mPa.s, and the mass fraction of terminal hydrogen groups and side hydrogen groups is 1.0%.

[0071] 1) Inhibit 20g of methyl vinyl silicone rubber, 25g of vinyl MQ silicone resin, 2g of hydroxyl raw rubber, 10g of hydroxyl MQ silicone resin, 20g of toluene, 0.2g of POSS, and 0.3g of divinyltetramethyldisiloxane The agent is added to the reaction kettle, stirred and dissolved;

[0072] 2) Stir with nitrogen gas, after stirring evenly, dilute 0.15g of benzoic acid with 32g of toluene and add slo...

Embodiment 3

[0076] POSS: dioxirane hexavinyl cage polysilsesquioxane;

[0077] Methyl vinyl silicone rubber raw rubber: molecular weight 600,000, vinyl mass fraction 0.4%;

[0078] Vinyl MQ silicone resin: the M / Q ratio is 0.7, the mass fraction of vinyl is 1.8%, and the molar mass is 4000g / mol;

[0079] Hydroxy raw rubber: molecular weight 600,000;

[0080] Hydroxy MQ silicone resin: M / Q ratio is 0.7, molar mass is 3000g / mol;

[0081] Silicon-hydrogen crosslinking agent: the viscosity is 80 mPa.s, and the mass fraction of terminal hydrogen groups and side hydrogen groups is 0.8%.

[0082] 1) Add 20g methyl vinyl silicone rubber raw rubber, 12g hydroxyl raw rubber, 10g hydroxyl MQ silicone resin, 10g vinyl MQ silicone resin and 20.5g toluene, 0.4g POSS, 0.1g ethynyl cyclohexanol inhibitor into the reactor , stir to dissolve;

[0083] 2) Stir with nitrogen gas, after stirring evenly, dilute 0.2g of propionic acid with 20g of toluene and add slowly, then react at 150°C for 5h under refl...

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Abstract

The invention discloses an organic silicon pressure-sensitive adhesive without pause marks and with high anchoring property. The formula of the organic silicon pressure-sensitive adhesive comprises an epoxy ethyl vinyl polyhedral oligomeric silsesquioxane (POSS) functional additive, vinyl silicone rubber with different vinyl contents, hydroxyl raw rubber, hydroxyl MQ silicon resin, vinyl MQ silicon resin, an inhibitor and a solvent. The POSS additive with customized functional groups is added, so that the pressure-sensitive adhesive film has good stripping force, meanwhile, pause marks do not appear when a protective film is stripped, good anchoring performance can be formed on a base material, the adhesive force is good, degumming is not prone to occurring, and meanwhile bubbles can be rapidly removed in the attaching process. The prepared organic silicon pressure-sensitive adhesive can meet the harsh requirements in the related fields of high-end process protection, fingerprint-resistant glass protection films, waste discharge films and the like.

Description

technical field [0001] The invention relates to the technical field of organosilicon pressure-sensitive materials, in particular to a silicone pressure-sensitive adhesive with good anchoring performance, no pause marks on the rubber surface when peeling off the protective film, no fingerprints on the surface of the rubber surface, and good peeling force and air release. Sensitive glue and its preparation method. Background technique [0002] Silicone pressure-sensitive adhesive is a kind of adhesive with silicone material as the main body, which has dry stickiness and permanent stickiness. It can firmly adhere to the surface of the substrate under pressure and can be peeled off from the surface of the adherend. Compared with other types of pressure-sensitive adhesives, silicone has some special properties: (1) good adhesion to low surface energy materials such as polytetrafluoroethylene, polyimide, etc.; (2) outstanding resistance to high Low temperature performance, can be...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J183/04C09J11/08C09J7/38
CPCC09J183/04C09J11/08C09J7/38C09J2301/302C08L83/04C08L83/06
Inventor 衣彦林程继业章琦王海梅
Owner WANHUA CHEM GRP CO LTD
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