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Latent curing agent

A curing agent, a potential technology, applied in the field of thermosetting compositions, which can solve problems such as inability to adapt

Active Publication Date: 2012-02-08
DEXERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that it cannot be adapted to the low-temperature curing epoxy resin composition in recent years.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] 242.2 g of kerosene, 15 g of ethyl cellulose, and aluminum diisopropanol-sec-butoxide (AMD, Kenfain Chemical Co., Ltd.) 66% toluene solution 29.2g and silsesquioxane type oxetane derivative (OX-SQ-H, Toagosei Co.) 66% toluene solution 9.4g, while stirring The electric mantle heater heated until the temperature of the reaction solution reached 120° C., and further stirred at a temperature of 120° C. for 1 hour. Then, the reaction liquid was cooled to room temperature using an ice bath. As a result, a precipitate was formed. Next, the precipitate was collected by filtering the reaction solution, washed three times with heptane, and dried under reduced pressure to obtain 30.0 g of an aluminum alkoxide latent curing agent (yield 74%) as a white solid.

Embodiment 2

[0065] 264.1 g of kerosene, 15 g of ethyl cellulose, aluminum diisopropanol-sec-butoxide (AMD, Kawasaki 7.3 g of a 66% toluene solution of Kenfain Chemical Co., Ltd.) and 9.4 g of a 66% toluene solution of a silsesquioxane type oxetane derivative (OX-SQ-H, Toagosei Co., Ltd.) were used while stirring. Heating with a bell-type electric heater until the temperature of the reaction solution reaches 100°C, and when it reaches 100°C, add 50 g of an isocyanate compound (Coronet L45E, manufactured by Japan Polyuretan Industrial Co., Ltd.) to the reaction solution, and heat and stir at 100°C for 30 minutes . Next, 4.2 g of a 66% toluene solution of an alicyclic epoxy compound (CEL2021P, manufactured by Daicel Chemical Industry Co., Ltd.) was added, and stirred at 120° C. for 30 minutes to make it react. After 30 minutes, the reaction liquid was cooled to room temperature using an ice bath. As a result, a precipitate was formed. Next, the precipitate was collected by filtering the r...

Embodiment 3

[0067] Except for using 29.3 g of a 66% toluene solution of aluminum diisopropoxide-sec-butoxide (AMD, Kawaken Fine Chemical Corporation), the operation of Example 2 was repeated to obtain an aluminum alkoxide latent curing agent, It is light yellow solid.

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Abstract

The invention provides an aluminum alcoholate type latent curing agent which can cure thermosetting epoxy resins under the conditions of moderately low temperature and short time; and a process for the production of the latent curing agent by which the curing conditions of the curing agent can be controlled relatively easily. The latent curing agent can be produced by reacting an aluminum alcoholate with a silsesquioxane-type oxetane derivative in the presence of a cellulose ether insoluble or slightly soluble in water. The latent curing agent has a coating layer made of the cellulose ether. It is preferable that the latent curing agent be surface-treated with an isocyanate compound.

Description

technical field [0001] The present invention relates to an aluminum alkoxide latent curing agent, a production method thereof, and a thermosetting composition containing the latent curing agent with good storage stability, wherein the aluminum alkoxide latent Curing agents can initiate curing of thermosetting compositions at relatively low temperatures. Background technique [0002] Thermosetting resin compositions such as epoxy resins are widely used as various adhesive materials, molding materials, etc., and latent imidazole-based curing agents are used as one of their curing agents. Since this latent imidazole type curing agent does not show curing ability in a normal storage state, it is widely used to make a thermosetting epoxy resin composition into a one-component type with good usability and good storage stability ( One-component type) curing composition. As a representative example of such a latent imidazole curing agent, a microcapsule type latent imidazole curin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/40
CPCC08G59/62C08G59/40C08G59/4085C08G59/682C08G2261/59C08K5/5415C08L1/02C08L63/00
Inventor 小室胜彦川岛纠伊东雅彦增子大辅
Owner DEXERIALS CORP