High-hardness edge-sealing silane-modified polyether sealant and preparation method thereof

A technology of silane-modified polyether and edge silane, which is applied in the direction of polyether adhesives, chemical instruments and methods, adhesives, etc., can solve the problem of low hardness of rubber strips, achieve fast curing speed, increase hardness density, and hard surface smooth effect

Inactive Publication Date: 2019-08-30

广州和新实业有限公司

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AI-Extracted Technical Summary

Problems solved by technology

For example, the Chinese invention patent with the patent number CN201410839249.1 discloses an environmentally friendly mildew-resistant silane-modi...

Abstract

The invention discloses a high-hardness edge-sealing silane-modified polyether sealant. The high-hardness edge-sealing silane-modified polyether sealant is characterized by achieving sealing hardnessof 80 to 90 Shore A and comprising the following raw materials by weight: 15 to 30 parts of a silane-modified polyether prepolymer, 13 to 20 parts of a plasticizer, 40 to 70 parts of a reinforcing incremental powder, 0.1 to 2 parts of an antioxidant, 1 to 10 parts of a cross-linking agent, 0.1 to 2 parts of a coupling agent, 0.05 to 0.09 part of a catalyst and 1 to 10 parts of high styrene resin.According to the invention, the hardness density of a silane-modified polyether sealant is improved; meanwhile, a cured product is guaranteed to be insusceptible to cracking and powdering; due to enlarged hardness density of a sealant slurry, water impurity is better prevented from permeating into the sealant; the surface of the high-hardness edge-sealing silane-modified polyether sealant is hardand smooth and facilitates scrubbing, so a long-acting mildew-proof effect is achieved; and when in use, the high-hardness edge-sealing silane-modified polyether sealant has rapid curing speed and isspecifically applicable to sealing of the seal edge of the position of a hand basin in a kitchen and a bathroom.

Application Domain

Non-macromolecular adhesive additivesOther chemical processes +4

Technology Topic

PrepolymerChemistry +11

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Examples

Experimental program(3)
Effect test(1)

Example Embodiment

[0022] Example 1

[0023] In the embodiment of the present invention, a high-hardness edge-sealing silane-modified polyether sealant has a sealing hardness of 88-90 Shore A after being cured. The sealant includes the following raw materials in parts by weight: silane-modified polyether pre- Polymer: 15 parts, plasticizer: 13 parts; Reinforcing and increasing powder: 57.5-66.5 parts; Antioxidant: 0.5 part; Cross-linking agent: 1.5 part; Coupling agent: 0.6 part; Catalyst: 0.05 part; High styrene resin: 4 parts.

[0024] The silane-modified polyether prepolymer is a siloxane-terminated modified polyether resin.

[0025] The plasticizer is one or more of diisodecyl phthalate (DIDP), diisononyl phthalate (DINP) and polyether polyol (PPG).

[0026] The reinforcing and increasing powder is one or several mixed powders of nanometer calcium carbonate, heavy calcium carbonate or titanium dioxide.

[0027] The described antioxidant is β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, β-(3,5-di-tert-butyl-4- One or more mixtures of pentaerythritol hydroxyphenyl)propionate and tris(2,4-di-tert-butylphenol)phosphite.

[0028] The crosslinking agent is vinyltrimethoxysilane; the coupling agent is γ-aminopropyltriethoxysilane or N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane One or two mixtures of silane; the catalyst is dibutyltin dilaurate.

[0029] The high styrene resin is HS-85 high styrene resin.

[0030] The preparation method of the above-mentioned high-hardness edge-sealing silane-modified polyether sealant is characterized in that, comprising the following steps:

[0031] 1), weigh the weight of each raw material according to the required proportion;

[0032] 2) First, uniformly mix the weighed plasticizer, reinforcing powder, high styrene resin and antioxidant, and heat it up to 110-120°C for dehydration, so that the moisture content of the material is lower than 600ppm;

[0033] 3) After high-temperature dehydration, the material is cooled again. After the material is cooled to below 40°C, silane-modified polyether prepolymer, cross-linking agent, coupling agent, and catalyst are added and stirred for 40 to 50 minutes under vacuum, and the material is stirred. Evenly, under the protection of nitrogen, the material is discharged and stored in an airtight manner to obtain a high-hardness edge-sealing silane-modified polyether sealant.

Example Embodiment

[0034] Example 2

[0035] In the embodiment of the present invention, a high-hardness edge-sealing silane-modified polyether sealant has a sealing hardness of 88 Shore A, and the sealant includes the following raw materials in parts by weight: silane-modified polyether resin: 15 parts, o-phenylene Diisononyl diformate (DINP): 13 parts, nano calcium carbonate: 18 parts, heavy calcium carbonate: 48 parts, titanium dioxide: 1.5 parts, β-(3,5-di-tert-butyl-4-hydroxybenzene base) octadecyl propionate: 0.5 part, vinyltrimethoxysilane: 1.5 part, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane 0.6 part, dilaurate dilaurate Butyl tin: 0.05 part, 4 parts of HS-85 high styrene resin.

[0036] Prepare as follows:

[0037] 1) Weigh the weight of each raw material according to the required proportion;

[0038] 2), the weighed diisononyl phthalate DINP plasticizer, nano calcium carbonate, heavy calcium carbonate, titanium dioxide reinforcing powder, high styrene resin and β-(3,5 -Di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester antioxidant was added to the high-speed disperser, the rotation speed was 700-900rpm, the high-speed dispersion made the material heat up, when the temperature rose to 90 ℃, the Vacuum dehydration, the vacuum is greater than -0.085MPa, and the temperature is kept at 110 ~ 120 ℃ for 3 hours, so that the moisture content of the material is less than 600ppm.

[0039] 3) After high temperature dehydration, after the material is cooled to below 40°C, add silane-modified polyether resin, vinyltrimethoxysilane crosslinking agent, N-(β-aminoethyl)-γ-aminopropyltrimethoxy The base silane coupling agent and dibutyltin dilaurate catalyst are vacuumed and stirred for 40-50 minutes, the vacuum is greater than -0.085MPa, the rotation speed is 300-500rpm, the material is stirred evenly, and the material is discharged under the protection of nitrogen for airtight storage, that is, high hardness is obtained. Silane-modified polyether sealant for edge sealing.

Example Embodiment

[0040] Example 3

[0041] A high-hardness edge-sealing silane-modified polyether sealant. After curing, the sealing hardness reaches 90 Shore A. The sealant includes the following raw materials in parts by weight: silane-modified polyether resin: 15 parts, phthalic acid Diisononyl ester (DINP): 13 parts, nano calcium carbonate: 25 parts, heavy calcium carbonate: 40 parts, titanium dioxide: 1.5 parts, β-(3,5-di-tert-butyl-4-hydroxyphenyl) Octadecyl propionate: 0.5 part, vinyltrimethoxysilane: 1.5 part, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane 0.6 part, dibutyltin dilaurate: 0.05 part, 4 parts of HS-85 high styrene resin.

[0042] Prepare as follows:

[0043] 1) Weigh the weight of each raw material according to the required proportion;

[0044]2) First, mix the well-weighed reinforced and incremental powders of nano-calcium carbonate, heavy calcium carbonate, and titanium dioxide, and then put them into an oven, and keep the temperature at 110-120 °C for 12 hours, so that the moisture content of the powder is lower than 600ppm .

[0045] 3) After the powder is cooled to below 40°C, add silane-modified polyether resin, high styrene resin, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester Antioxidant, vinyltrimethoxysilane crosslinking agent, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane coupling agent, dibutyltin dilaurate catalyst are vacuumed and stirred for 40 to 50 minutes, The vacuum is greater than -0.085MPa, the rotation speed is 300-500rpm, the material is stirred evenly, and the material is discharged and stored under nitrogen protection to obtain a high-hardness edge-sealing silane-modified polyether sealant.

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Classification and recommendation of technical efficacy words

Hard and smooth surface

Method for compounding double-layer plating films on plastic surface by fully dry method

ActiveCN102328477Ahigh glossHard and smooth surface

Owner:XIAMEN RUNNER IND CORP

High-hardness edge-sealing silane-modified polyether sealant and preparation method thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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