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Multi-carboxyl cage silsesquioxane modified epoxy resin and application thereof in coating

A technology of silsesquioxane and epoxy resin, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of blank, cage-type silsesquioxane difficult to disperse, and difficulty, and achieve fast reaction speed , good fullness and good adhesion

Inactive Publication Date: 2014-06-18
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this modification method is often difficult, mainly reflected in the difficulty of dispersing cage-type silsesquioxane in epoxy resin, and this modification method has little effect on the drying speed of epoxy resin
Therefore, synthesizing an epoxy resin with high hardness, good wear resistance and fast drying speed has always been pursued by manufacturers, but there is still a blank in this aspect at home and abroad.

Method used

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  • Multi-carboxyl cage silsesquioxane modified epoxy resin and application thereof in coating
  • Multi-carboxyl cage silsesquioxane modified epoxy resin and application thereof in coating
  • Multi-carboxyl cage silsesquioxane modified epoxy resin and application thereof in coating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The polycarboxy cage type silsesquioxane modified epoxy resin of the present invention is prepared by the following method:

[0039]Polycarboxy cage silsesquioxane, epoxy resin, catalyst, and organic solvent are formulated according to the formula shown in Table 1. CSQ and epoxy resin are put into the reaction kettle, and then the catalyst triphenylphosphine and the organic solvent toluene are uniformly mixed. ; Heating to the range of 105-110° C., keeping the temperature for 3 hours, and stopping the reaction when the difference in acid value does not exceed 0.1 mgKOH / g. Dilute to a solid content of 75% with the amount of ethyl acetate and butyl acetate shown in Table 1, and filter the material to obtain a CSQ modified epoxy resin in the state of use containing highly active hydroxyl groups.

[0040] Table 1 The preparation formula table of CSQ modified epoxy resin

[0041]

[0042]

[0043] Adopt above-mentioned polycarboxyl cage silsesquioxane modified epoxy r...

Embodiment 2

[0045] The preparation method of polycarboxy cage type silsesquioxane modified epoxy resin is as follows:

[0046] Polycarboxy cage type silsesquioxane, epoxy resin and catalyst, organic solvent are pressed the formula shown in table 2, put CSQ and epoxy resin into reactor, then drop into catalyst tetrabutylphosphonium acetate and organic solvent respectively Mix xylene evenly; heat up to 110-115°C, keep warm for 2 hours, and terminate the reaction when the difference in acid value does not exceed 0.1mgKOH / g. Dilute to 75% solids with the amount of 200# solvent oil and butyl acetate shown in Table 2, and filter the material to obtain a CSQ modified epoxy resin containing a highly active hydroxyl group.

[0047] Using the above-mentioned polycarboxy cage silsesquioxane modified epoxy resin as a raw material, a high-hardness fast-curing coating is prepared. Before the curing agent is used, ethyl acetate is added to a solid content of 40%. The organic coating and the curing agent...

Embodiment 3

[0052] The preparation method of the polycarboxy cage silsesquioxane modified epoxy resin is the same as in Example 2, and the specific formula is shown in Table 3. Finally, it is diluted to 70% with the consumption of 200# solvent oil shown in table 3 to the solid content, and the material is filtered to obtain the CSQ modified epoxy resin containing highly reactive hydroxyl groups.

[0053] Using the above-mentioned polycarboxy cage silsesquioxane modified epoxy resin as raw material, prepare a high-hardness fast-curing coating, add ethyl acetate to the solid content of 35% before the curing agent is used, organic coating and curing agent The components and their content ratios are shown in Table 9; the drier in the auxiliary agent is naphthenic acid metal soap, the dispersant is polycarboxylate amine type and modified polysiloxane type, and the leveling agent is poly Acrylic ester and polyether modified silicone; Its method is with embodiment 1.

[0054] The preparation fo...

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Abstract

The invention belongs to the field of epoxy resin coating, and discloses a multi-carboxyl cage silsesquioxane (CSQ) modified epoxy resin and an application thereof in coating. The CSQ modified epoxy resin is prepared by following steps of throwing CSQ and epoxy resin into a reaction kettle according to the mass ratio of (1:4)-(1:7), adding a catalyst and an organic solvent, and mixing uniformly; reacting for 2-4 hours at 105-115DEG C, filtering and discharging, so as to obtain CSQ modified epoxy resin containing high activity hydroxyl; and then carrying out curing reaction on the hydroxyl and polyisocyanate group so as to prepare a high hardness quick curing coating, wherein the mass ratio of the organic coating to the curing agent is (30:50)-(70:25). The CSQ modified epoxy resin has high hardness, good abrasion performance and fast drying speed, so that the coating prepared based on the modified epoxy resin has advantages of high hardness, good toughness, fast drying speed, good shock resistance and good corrosion resistance.

Description

technical field [0001] The invention belongs to the field of epoxy resin coatings, in particular to a polycarboxy cage silsesquioxane modified epoxy resin and its application in coatings. Background technique [0002] With the development of the economy, users have higher and higher requirements for the performance of epoxy paint, not only requiring it to have excellent adhesion and wear resistance, but also requiring it to be self-drying after 24 hours of painting, so that the epoxy resin The fast drying requirements are very high. The epoxy resin molecular chain contains carboxyl, hydroxyl, epoxy and other groups, so it has excellent mechanical properties and physical and chemical properties. Epoxy resin coatings become macromolecules with a network structure by cross-linking with a curing agent during the drying process. However, in epoxy resin paint, simply using a curing agent to cure epoxy resin, the cured product has high brittleness, low impact strength, and is eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14C09D175/04C09D7/12
Inventor 何宇陈荣许凯陈鸣才杨坤方燕许正敏康伦国孙小光
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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