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accelerator composition

一种组合物、加速剂的技术，应用在加速剂组合物领域，能够解决加速环氧化物和胺适用性、未教导等问题

Active Publication Date: 2019-11-08
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above patents do not teach the suitability of chromium(III) carboxylates for accelerating the reaction between epoxides and amines

Method used

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Experimental program
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preparation example Construction

[0051] The preparation of the accelerator composition of the present invention and / or any step thereof may be a batch or continuous process. Equipment for carrying out the reaction includes those known to those skilled in the art.

[0052] The accelerator composition produced by the method of the present invention produces a novel composition with synergistic, unexpected and unique properties. For example, it has been found that the accelerators of the present invention result in extremely fast curing of epoxy-amines while maintaining other properties such as long pot life, good time delay at room temperature, low toxicity, low viscosity, chemical resistance and excellent mechanical properties. Surprisingly, in one embodiment, the accelerator of the present invention can reduce the exothermic peak temperature of the curable epoxy-aromatic amine composition by 72°C (187°C to 115°C, 39% reduction).

[0053] As previously stated, in one embodiment of the invention accelerators ...

example

[0095] The following examples and comparative examples further illustrate the present invention in detail, but should not be construed as limiting the scope thereof.

[0096] In the examples below, various terms and names are used, such as for example:

[0097] "DETDA" means diethyltoluenediamine.

[0098] "DSC" means Differential Scanning Calorimeter.

[0099] "DMTA" stands for Dynamic Mechanical Thermal Analysis.

[0100] "DOE" means Design of Experiments.

[0101] D.E.R. 383 is an epoxy resin having an EEW of 173 to 183 and commercially available from The Dow Chemical Company.

[0102] D.E.R. 431 is an epoxy novolac resin having an EEW of 172 to 179 and commercially available from The Dow Chemical Company.

[0103] Z is a blend of aromatic amines (1,3-phenylenediamine and 4,4'-diaminodiphenylmethane) used as a curing agent for epoxy resins and is commercially available from Air Products ).

[0104] D230 is a polyetheramine and is commercially available from Huntsm...

example 1-C

[0117] Example 1-Cu(BF 4 ) 2 and Cr(C 8 h 15 o 2 ) 3 Synthesis of Accelerators

[0118] Cu(BF was synthesized using the following general procedure; 4 ) 2 and Cr(C 8 h 15 o 2 ) 3 accelerator.

[0119] Copper(II) tetrafluoroborate (Cu(BF 4 ) 2 ) hydrate was obtained from Sigma-Aldrich Chemical Company. Under vigorous stirring at 70°C to 80°C, the Cu(BF 4 ) 2 with Cr(C 8 h 15 o 2 ) 3 Mix for 2hr to 3hr. Cu(BF 4 ) 2 / Cr(C 8 h 15 o 2 ) 3 Various mixtures of ® were evaluated as accelerators for epoxy-amine compositions.

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Abstract

The present invention relates to an accelerator composition for epoxy resin formulations, said accelerator composition comprising (i) at least one transition metal complex and (ii) at least one salt, wherein the salt the cation is a metal cation or an onium cation with a non-nucleophilic anion; and a curable epoxy resin composition comprising (A) at least one epoxy thermosetting resin, (B) at least one curing agent, and (C) the above accelerator; a curable epoxy resin composition containing the above accelerator; and a cured thermosetting material produced from the above curable epoxy resin composition.

Description

technical field [0001] The present invention relates to a novel accelerator for fast curing epoxy resin compositions and the use of such accelerators in thermosettable resin compositions such as curable epoxy resin compositions useful in the manufacture of cured thermoset articles. use. Background technique [0002] An "accelerator" or "catalyst" for a thermosettable resin such as an epoxy resin composition is defined as a compound or mixture of compounds that catalyzes the curing reaction of the epoxide with the hardener, and more precisely, the Class "accelerators" speed up the reaction and allow the reaction to be carried out at a lower temperature or for a shorter period of time than a composition not containing the accelerator. In general, the reactivity of amines decreases in the following order: aliphatic amines, cycloaliphatic amines, and aromatic amines. There has always been a need to accelerate the curing reaction between thermoset resins and amine curing agents...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/50C08G59/68C08G59/72
CPCC08G59/5033C08G59/681C08G59/685C08G59/72C08G2650/50C08G59/245
Inventor 钱惠锋G·A·亨特G·古利亚斯
Owner DOW GLOBAL TECH LLC
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