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Radiation curing sealant composition and preparation method thereof

A radiation curing and sealant technology, used in non-polymer organic compound adhesives, adhesives, adhesive additives, etc., to achieve the effects of good yellowing resistance, improved efficiency, and excellent overall performance

Inactive Publication Date: 2017-08-04
江苏海川卓越密封材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a radiation-curable sealant composition and a preparation method thereof. Under ultraviolet light irradiation, it has specific rapid solidification characteristics, and solves the problem of rapid deep-layer curing, good elastic recovery force and tensile elongation. High and good adhesion to the substrate and no corrosion, as well as improving processing efficiency and reducing costs

Method used

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  • Radiation curing sealant composition and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: The preparation ratio of each raw material in the radiation curing sealant composition

[0026] The raw materials in the radiation-curable sealant composition were mixed in parts by mass as described in Table 1 to obtain three groups of radiation-curable sealant compositions I to III with different mixing ratios.

[0027] The radiation curing sealant composition of table 1 different mixing ratio (mass fraction)

[0028]

Embodiment 2

[0029] Embodiment 2: the preparation method of radiation curing sealant composition

[0030] Step 1. Preparation of acrylic acid-thiol prepolymer: Add 5 parts of hexamethylene diisocyanate to 15 parts of pentaerythritol tetramercaptoacetate and mix them. Under the protection of N2, slowly raise the temperature and control the reaction temperature at 40°C. Measure the content of isocyanate every half an hour until the content of isocyanate drops to the theoretical value; after the content of isocyanate drops to the theoretical value, add 20 parts of pentaerythritol tetraacrylate and N,N-dimethyl ring 0.1 part of hexyldiamine, and gradually heat up to 65-75°C, detect the content of free isocyanate, take the content of free isocyanate as less than 0.5% as the reaction end point, cool to room temperature, and obtain the acrylic acid-thiol pre- Polymer.

[0031] Step 2, 20 parts of acrylic acid-mercaptan prepolymers, acrylate copolymer (the mol ratio of tripropylene glycol diacryl...

Embodiment 3

[0032] Embodiment 3: the preparation method of radiation curing sealant composition

[0033] Step 1. Preparation of acrylic acid-thiol prepolymer: Add 18 parts of hexamethylene diisocyanate to 25 parts of pentaerythritol tetramercaptoacetate and mix them. Under the protection of N2, the temperature is raised slowly, and the reaction temperature is controlled at 40°C. Measure the content of isocyanate every half an hour until the content of isocyanate drops to the theoretical value; after the content of isocyanate drops to the theoretical value, add 20 parts of pentaerythritol tetraacrylate and N,N-dimethyl ring 2 parts of hexyldiamine, and gradually heat up to 65-75°C, detect the content of free isocyanate, take the content of free isocyanate less than 0.5% as the reaction end point, cool to room temperature, and obtain the acrylic acid-thiol pre- Polymer.

[0034] Step 2, 45 parts of acrylic acid-mercaptan prepolymer, acrylate copolymer (the mol ratio of tripropylene glycol ...

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Abstract

The invention discloses a radiation curing sealant composition and a preparation method thereof. The radiation curing sealant composition comprises acrylate copolymer, acrylic acid-mercaptan prepolymer, photoinitiator, a coupling agent, a reactive diluent, an antioxidant and a defoaming agent. Compared with the prior art, the radiation curing sealant composition and the preparation method thereof have the advantages that the acrylic acid-mercaptan prepolymer is introduced, system viscosity partial fast increasing during polymerization is prevented, and polymer is allowed to have a small shrinkage rate and high Tg curing performance; a ketoxime ester compound is used as the photoinitiator, and light sensitivity and storage stability can be increased; the radiation curing sealant composition can achieve fast curing under normal temperature, production efficiency is increased, and the composition is low in cost and excellent in comprehensive performance; large-scale industrial production can be achieved, and the composition is an environment-friendly material; the preparation method is simple to operate and high in safety coefficient, the composition does not need mixing and stirring before use, a construction process is simplified greatly, and the composition is stable in storage.

Description

technical field [0001] The invention relates to the field of sealant compositions, in particular to a radiation-cured sealant composition and a preparation method thereof. Background technique [0002] Sealant is a sealing material that deforms with the shape of the sealing surface, is not easy to flow, and has a certain degree of adhesion. It is an adhesive used to fill the configuration gap and seal it. It has the functions of anti-leakage, waterproof, anti-vibration, sound insulation and heat insulation, and can be widely used in the sealing of construction, transportation, electronic instruments and parts. [0003] Electronics and optoelectronics are often heat sensitive and cannot tolerate prolonged curing, and many optoelectronics are also moisture or oxygen sensitive which requires avoiding exposure during the working life. The silicone sealant usually used in electronic devices takes a long time to cure, and it takes at least 48 hours to completely cure, which seri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J11/06
CPCC09J4/06C09J11/06
Inventor 吴德斌
Owner 江苏海川卓越密封材料有限公司