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Quick-curing organosilicon pressure-sensitive adhesive and adhesive tape

A silicon pressure-sensitive adhesive, fast-curing technology, used in adhesives, adhesive additives, pressure-sensitive films/sheets, etc. High problems, to achieve the effect of wide range of adhesion, fast curing rate and low production cost

Inactive Publication Date: 2019-10-18
太仓斯迪克新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the curing rate of conventional glue is slow, and the speed of the machine coating machine is not high, resulting in low production capacity and high product coating costs

Method used

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  • Quick-curing organosilicon pressure-sensitive adhesive and adhesive tape

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0102] At the same time, the present invention also discloses a method for preparing a fast-curing silicone pressure-sensitive adhesive, which is used to prepare the above-mentioned silicone pressure-sensitive adhesive, which mainly includes the following steps:

[0103] 1) adding the solvent and vinyl-containing polysiloxane into the reaction kettle, stirring at a temperature of 40-50°C for 3 hours to obtain a silicone rubber dispersion with a solid content of 24.5%-25.5%;

[0104] 2) Take the solvent again, and stir and mix it with the silicone rubber dispersion in step 1) in a ratio of 1:1 by mass;

[0105] 3) During the stirring process, sequentially add methyl vinyl MQ silicone tackifier, crosslinking agent, reaction inhibitor and catalyst, and mix thoroughly to obtain the silicone pressure-sensitive adhesive.

[0106] The above-mentioned adhesive and the preparation method of the adhesive in the present invention can be used for PET substrate silicone protective film, su...

Embodiment 1

[0142] Take 25 parts of vinyl-terminated silicone rubber with a weight-average molecular weight of 550,000 and a vinyl content of 0.08%, and disperse them in 75 parts of a mixed solvent with a mass ratio of toluene and ethyl acetate of 1:1 to obtain a silicone rubber dispersion with a solid content of 25%. Then add 1 part of silicone oil with silicon hydrogen content of 1.1mol / 100g and 0.5 part of reaction inhibitor to fully disperse; then add 1 part of platinum catalyst dispersed and diluted in 10 parts of toluene solution and fully disperse for 30 minutes , the glue was obtained by stirring with a pump, and the glue was applied to a 50-micron thick PET substrate through a slit-type coating head, and the wet glue thickness was controlled to be 80 μm to obtain a tape.

[0143] Send the above-mentioned adhesive tape into 7 sections of 40-meter blast drying tunnel, with temperature gradients of 110°C, 135°C, 150°C, 160°C, 165°C, 160°C, 120°C, and line speed of 20m / min to obtain t...

Embodiment 2

[0145]Take 25 parts of vinyl-terminated silicone rubber with a weight-average molecular weight of 550,000 and a vinyl content of 0.08%, and 4.5 parts of MQ silicone tackifier with a vinyl content of 0.2% and a M / Q ratio of 0.7, and disperse them in 140 parts of toluene A silicone rubber dispersion with a solid content of 25% is obtained in a mixed solvent with a mass ratio of 1:1 to ethyl acetate, and is fully swollen; then add 1 part of silicone oil with a silicon hydrogen content of 1.1mol / 100g and 0.5 part of a reaction inhibitor, Fully disperse; then add 1 part of the platinum catalyst previously dispersed and diluted in 10 parts of toluene solution to fully disperse for 30 minutes, and get the glue by stirring with a pump, and put the glue into the slit coating head and coat it on the PET substrate with a thickness of 50 microns. Control the thickness of the wet glue to 70 μm to obtain an adhesive tape.

[0146] Send the above-mentioned adhesive tape into 7 sections of 40...

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Abstract

The invention discloses a quick-curing organosilicon pressure-sensitive adhesive, and belongs to the field of adhesives. The organosilicon pressure-sensitive adhesive is obtained by carrying out an addition reaction on a polysiloxane methyl vinyl MQ organosilicon tackifier containing vinyl under the action of a cross-linking agent, a reaction inhibitor and a platinum catalyst. According to the organosilicon pressure-sensitive adhesive provided by the invention, through selection of monomers, especially selection of functional groups and proportions of the functional monomers, optimization andimprovement of a process, and selection of a matching effect of the catalyst and the functional groups of the functional monomers, the adhesive can achieve the purpose of direct winding and quick curing after a base material is coated, and good viscous force and stripping force can be ensured.

Description

technical field [0001] The invention relates to an adhesive, in particular to a fast-curing silicone pressure-sensitive adhesive and adhesive tape. Background technique [0002] Silicone pressure-sensitive adhesive is a high-quality and high-end variety of pressure-sensitive adhesives. When encountering harsh conditions, such as harsh temperature, exposure to chemicals, moisture, radiation, high temperature resistance, long service life and other requirements, silicone pressure-sensitive adhesives have irreplaceable advantages and have broad market application prospects. [0003] Silicone pressure-sensitive adhesives are usually composed of silicone rubber, silicone resin, crosslinking agent and other additives and solvents. The main rubber component is a polymer elastomer (silicone rubber) and a tackifying resin (MQ resin). [0004] There are many parameters that affect the adhesive performance of silicone pressure-sensitive adhesives. The most directly influencing param...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/38C09J7/25C09J183/07C09J11/08
CPCC08L2205/025C08L2205/03C09J11/08C09J183/04C09J2467/006C09J2483/00C09J7/255C09J7/38C09J2301/122C09J2301/302C09J2301/312C08L83/04
Inventor 金闯李健
Owner 太仓斯迪克新材料科技有限公司
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