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Long-acting and mildew-proof sealant composition and preparation method thereof

A sealant and composition technology, which is applied in the directions of adhesives, adhesive additives, non-polymer adhesive additives, etc., to achieve the effects of improving storage period, long-term anti-mildew and antibacterial efficacy, and controllable reaction.

Inactive Publication Date: 2017-08-11
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

[0004] In order to solve the above technical problems, the present invention provides a long-acting anti-mildew sealant composition and its preparation method to solve the problem of stable storage, excellent mechanical properties, and can be used under long-term water immersion, damp heat or other conditions that are prone to mold growth The issue of sealing and anti-mold requirements

Method used

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  • Long-acting and mildew-proof sealant composition and preparation method thereof
  • Long-acting and mildew-proof sealant composition and preparation method thereof
  • Long-acting and mildew-proof sealant composition and preparation method thereof

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Embodiment 1

[0026] Embodiment 1: the preparation ratio of each raw material in the long-acting mildew-resistant sealant composition

[0027] The raw materials in the long-acting mildew-proof sealant composition were mixed according to the mass parts described in Table 1, and three groups of long-acting mildew-proof sealant compositions I to III with different mixing ratios were obtained.

[0028] The long-acting mildew-resistant sealant composition of different mixing ratios (parts by mass) of table 1

[0029]

Embodiment 2

[0030] Embodiment 2: the preparation method of the long-acting mildew-resistant sealant composition

[0031] Step 1. Preparation of silicon-nitrogen heterocyclic compound: put trifluoromethanesulfonic acid and silane compound with a molar ratio of 1:1500 into the reaction kettle, carry out intramolecular cyclization reaction, heat to reflux state, and the reaction time is 5-20h , stop the reaction when the reaction no longer generates alcohol, and distill to obtain the silicon nitrogen heterocyclic compound.

[0032] Described silane compound is shown in the following formula:

[0033] where n=2;

[0034] The acid is one of fluorosulfonic acid, benzenesulfonic acid and methanesulfonic acid.

[0035] Preparation of nano-silver antifungal agent: Dissolve glucose in deionized water, configure a solution with a molar concentration of 1.5mol / L, and place it in a hydrothermal reactor at 140-180°C for a reaction time of 8-20 hours; After completion, the resulting mixture was cen...

Embodiment 3

[0038] Embodiment 3: the preparation method of long-acting mold-proof sealant composition

[0039] Step 1. Preparation of silicon-nitrogen heterocyclic compound: put fluorosulfonic acid and silane compound with a molar ratio of 1:500 into the reactor, carry out intramolecular cyclization reaction, heat to reflux state, and the reaction time is 5-20h. Stop the reaction when alcohol is no longer generated, and distill to obtain the silicon nitrogen heterocyclic compound.

[0040] Described silane compound is shown in the following formula:

[0041] where n=4;

[0042] Described acid is a kind of in,,, benzenesulfonic acid, methanesulfonic acid.

[0043] Preparation of nano-silver antifungal agent: Dissolve glucose in deionized water, configure a solution with a molar concentration of 0.5mol / L, and place it in a hydrothermal reaction kettle for reaction at 140-180°C for 8-20 hours; After completion, the resulting mixture was centrifuged, washed with deionized water and absol...

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Abstract

The invention discloses a long-acting mildew-proof sealant composition, which consists of trimethoxy-terminated polydimethylsiloxane, nano-silver anti-mold agent, hydroxyl scavenger, cross-linking agent, coupling agent and catalyst. The hydroxyl scavenger is a silicon nitrogen heterocyclic compound. Compared with the prior art, the long-acting anti-mildew sealant composition of the present invention uses a silicon nitrogen heterocyclic compound as a hydroxyl scavenger, has good compatibility with the alcohol-type silicone sealant system, and can significantly improve the single-component sealant composition. Dealcoholized silicone rubber has a long storage life and can effectively improve the adhesion of the substrate; the introduction of nano-silver antibacterial agent can continuously and stably release silver ions into the bacteria through ionization, allowing them to penetrate the cell wall into the cell and react with the SH group , to coagulate the protein, destroy the activity of cell synthetase, and then release it again, so as to maintain the anti-mildew and anti-bacterial effect for a long time, with environmental protection, non-toxic, high-efficiency, stable and long-lasting anti-mold and anti-bacterial effect.

Description

technical field [0001] The invention relates to the field of sealant compositions, in particular to a long-acting mold-proof sealant composition and a preparation method thereof. Background technique [0002] Silicone sealant has excellent aging resistance, anti-ultraviolet, shock resistance, high and low temperature resistance, and can maintain elasticity in harsh climate environments, so it is widely used in construction, automobiles, electrical and electronic, machinery, chemicals, etc. The industrial dealcoholized room temperature vulcanized silicone rubber releases alcohol during the vulcanization process. Compared with the deacidified type and the deketoxime type, it has the advantages of environmental protection and non-corrosion. [0003] Defects of the prior art: the vulcanization performance of silicone sealants gradually declines or even does not vulcanize with the prolongation of storage time. The main reason is that the free alcohol in dealcoholized RTV silicone...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06
CPCC09J183/06C08K5/549C08K2003/0806C08K2201/011C09J11/04C09J11/06
Inventor 吴德斌
Owner 江苏海川卓越密封材料有限公司
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