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Antifouling silane modified polyether adhesive and preparation method thereof

A silane-modified polyether and antifouling technology, used in the field of sealants, can solve the problems of affecting the appearance and visual effects of buildings, easy to accumulate on the surface, difficult building maintenance, etc., to achieve excellent gloss retention, improve adhesion and adhesion The effect of sex, high elasticity

Active Publication Date: 2021-04-06
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional sealant has poor weather resistance, and the colloid is easy to accumulate on the surface after cracking and pulverization, or due to its own characteristics, dust and industrial air pollutants are easy to adsorb and accumulate on the surface of the colloid.
These adsorption accumulations are easy to cause discoloration or fading on the surface of the rubber under the erosion of rainwater; and some organic substances contained in the sealant itself, such as plasticizers that do not participate in the reaction, unreacted polymers, etc. Migration slowly penetrates into the surface of the building substrate, forming dark bands of pollutants on both sides of the substrate joints, which affects the appearance and visual effects of the building, and also brings great difficulties to the maintenance of the building

Method used

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  • Antifouling silane modified polyether adhesive and preparation method thereof
  • Antifouling silane modified polyether adhesive and preparation method thereof
  • Antifouling silane modified polyether adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The anti-fouling silane-modified polyether glue provided in this example is prepared from the following components in parts by weight:

[0056]

[0057]

[0058] Wherein the preparation method of the fluorosilane modified polyether polymer is as follows:

[0059] The first step, the preparation of amino-terminated fluorosiloxane: ①Under the protection of nitrogen, at a temperature of 60°C, according to the mass ratio of 3,3,3-trifluoropropylmethylcyclotrisiloxane (D 3 F): Ethylenediamine (catalyst): water=100:0.7:0.2, with D 3 F, ethylenediamine and water were stirred at constant temperature for 10 hours, and anionic ring-opening polymerization was carried out to generate hydroxyl fluorosilicone oil (D 3 FOH). The reaction mechanism is as follows:

[0060]

[0061] ②The above prepared D 3 FOH is transferred to the reaction vessel, fed with nitrogen, heated, according to the molar ratio of D 3 FOH:aminosiloxane=1:2.5 Add aminosiloxane KH550 dropwise gradual...

Embodiment 2

[0069] The anti-fouling silane-modified polyether glue provided in this example is prepared from the following components in parts by weight:

[0070]

[0071] Wherein the preparation method of the fluorosilane modified polyether polymer is as follows:

[0072] The first step, the preparation of amino-terminated fluorosiloxane: ①Under the protection of nitrogen, at a temperature of 60°C, according to the mass ratio of 3,3,3-trifluoropropylmethylcyclotrisiloxane (D 3 F): ethylenediamine (catalyst): water=100:2:0.5, D 3 F, ethylenediamine and water are stirred at constant temperature for 10 minutes, and anionic ring-opening polymerization is carried out to generate D 3 FOH.

[0073] ②The above prepared D 3 FOH is transferred to the reaction vessel, fed with nitrogen, heated, according to the molar ratio of D 3 FOH: aminosiloxane = 1:4, add aminosiloxane KH540 dropwise gradually, and react at a constant temperature for 4 hours at a temperature of 50°C. After the reaction,...

Embodiment 3

[0080] The anti-fouling silane-modified polyether glue provided in this example is prepared from the following components in parts by weight:

[0081]

[0082]

[0083] Wherein the preparation method of the fluorosilane modified polyether polymer is as follows:

[0084] The first step, the preparation of amino-terminated fluorosiloxane: ①Under the protection of nitrogen, at a temperature of 60°C, according to the mass ratio of 3,3,3-trifluoropropylmethylcyclotrisiloxane (D 3 F): Ethylenediamine (catalyst): water=100:1.5:0.8, with D 3 F, ethylenediamine and water were stirred at constant temperature for 10 hours, and anionic ring-opening polymerization was carried out to generate D3 FOH.

[0085] ②The above prepared D 3 FOH is transferred to the reaction vessel, fed with nitrogen, heated, according to the molar ratio of D 3 FOH: aminosiloxane = 1:5, add aminosiloxane KH792 dropwise gradually, and react at a constant temperature for 3 hours at a temperature of 80°C. Af...

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Abstract

The invention discloses an antifouling silane modified polyether adhesive and a preparation method thereof. The antifouling silane modified polyether adhesive is prepared from the following raw materials: a fluorosilane modified polyether polymer, an acrylic acid modified MS polymer, a reactive diluent, a reinforcing filler, a rheological agent, a stabilizer, a water removal agent, a coupling agent and a catalyst A, wherein the fluorosilane modified polyether polymer is obtained by reacting amino-terminated fluorosiloxane with an isocyanate-terminated polyether prepolymer in the presence of a reaction activity moderator; wherein the amino-terminated fluorosiloxane is prepared from hydroxyl fluorosilicone oil and amino siloxane; wherein the isocyanate-terminated polyether prepolymer is obtained by reacting polyether polyol with polyisocyanate under the action of a catalyst B; wherein the reactive diluent is single-ended alkoxy silane-based polyether. The antifouling silane modified polyether adhesive has excellent antifouling property, weather resistance and physical and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to an antifouling silane-modified polyether glue and a preparation method thereof. Background technique [0002] Sealant is widely embedded in various building joints, glass, doors and windows, and plays a watertight and airtight role. It has energy-saving, waterproof and other functions. It is one of the important materials in the construction field. However, the traditional sealant has poor weather resistance, and the colloid is easy to accumulate on the surface after cracking and pulverization, or due to its own characteristics, dust and industrial air pollutants are easy to adsorb and accumulate on the surface of the colloid. These adsorption accumulations are easy to cause discoloration or fading of the surface of the rubber under the erosion of rainwater; and some organic substances contained in the sealant itself, such as plasticizers that do not participate in the reaction,...

Claims

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Application Information

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IPC IPC(8): C09J171/00C09J201/00
CPCC09J171/00C09J201/00C08L2201/08C08L101/00C08L71/00
Inventor 陈洋庆高敏华陈建军黄恒超缪明松
Owner GUANGZHOU BAIYUN CHEM IND
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