One-part anti-aging epoxy resin composition for rtm molding

A technology of epoxy resin and hydantoin epoxy resin, which is applied in the field of one-part epoxy resin composition for RTM molding, can solve the problems of high reject rate and slowness of products, and achieve low viscosity, good manufacturability and stability excellent effect

Active Publication Date: 2017-05-10
CHINA NAT BLUESTAR (GRP) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the two components start to react slowly when they are mixed, sometimes the mold is basically solidified before filling the entire mold, resulting in a high product rejection rate

Method used

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  • One-part anti-aging epoxy resin composition for rtm molding
  • One-part anti-aging epoxy resin composition for rtm molding
  • One-part anti-aging epoxy resin composition for rtm molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. The composition of the composition: as shown in Table 1; the viscosity of the composition was tested with an NDJ-8S rotational viscometer, and the viscosity at 25°C was 389mPa·s;

[0031] Table 1: Composition of the compositions

[0032]

[0033] 2. Preparation of RTM molding epoxy resin:

[0034] (1) The reaction exothermic curve of the composition was tested by differential scanning calorimetry, and the heating rate was measured at 5°C / min and 15°C / min, and the gel temperature was 67°C and the curing temperature was 90°C by extrapolation , the post-curing treatment temperature is 125°C;

[0035] (2) After stirring the composition evenly, place it in a vacuum drying oven to remove air bubbles; pour it into a closed mold, and cure it according to the following procedure: 67°C for 1 hour, 90°C for 2 hours, and 125°C for 2 hours, that is Get RTM molding epoxy resin.

[0036] 3. Performance testing of molded epoxy resin:

[0037] (1) Differential scanning calorim...

Embodiment 2

[0041] 1. Composition composition: as shown in Table 2; the viscosity of the composition was tested with an NDJ-8S rotational viscometer, and the viscosity at 25°C was 390mPa·s;

[0042] Table 2: Composition of the compositions

[0043]

[0044]

[0045] 2. Preparation of RTM molding epoxy resin:

[0046] (1) The reaction exothermic curve of the composition was tested by differential scanning calorimetry, and the heating rate was measured at 5°C / min and 15°C / min, and the gel temperature was 67°C and the curing temperature was 90°C by extrapolation , the post-curing treatment temperature is 125°C;

[0047] (2) After stirring the composition evenly, place it in a vacuum drying oven to remove air bubbles; pour it into a closed mold, and cure it according to the following procedure: 67°C for 1 hour, 90°C for 2 hours, and 125°C for 2 hours, that is Get RTM molding epoxy resin.

[0048] 3. Performance testing of molded epoxy resin:

[0049] (1) Differential scanning calori...

Embodiment 3

[0053] 1. Composition composition: as shown in Table 3; the viscosity of the composition was tested with an NDJ-8S rotational viscometer, and the viscosity at 25°C was 484mPa·s;

[0054] Table 3: Composition of the compositions

[0055]

[0056] 2. Preparation of RTM molding epoxy resin:

[0057] (1) The reaction exothermic curve of the composition was tested by differential scanning calorimetry, and the heating rate was measured at 5°C / min and 15°C / min, and the gel temperature was 65°C and the curing temperature was 89°C by extrapolation , the post-curing treatment temperature is 110°C;

[0058] (2) After stirring the composition evenly, place it in a vacuum drying oven to remove air bubbles; pour it into a closed mold, and cure it according to the following procedure: 65°C for 1 hour, 89°C for 2 hours, and 110°C for 2 hours, that is Get RTM molding epoxy resin.

[0059] 3. Performance testing of molded epoxy resin:

[0060] (1) Differential scanning calorimetry (DSC m...

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Abstract

The invention relates to a one-component RTM (Resin Transfer Molding) anti-aging epoxy resin composition which comprises the following components in parts by weight: 100 parts of compound epoxy resin, 90-150 parts of a microcapsule-type curing agent, 0.5-5 parts of a compound light stabilizer and 1-10 parts of a diluent, wherein the microcapsule-type curing agent is composed of a capsule core and a capsule shell at the mass ratio of 1: (2-3), and the capsule core contains 80-95 percent by mass of a compound curing agent and 5-20 percent by mass of a compound antioxidant. The invention further protects molding epoxy resin prepared by taking the composition as a raw material.

Description

technical field [0001] The invention relates to the processing and application fields of epoxy resins, in particular to a one-part epoxy resin composition for RTM molding. Background technique [0002] Epoxy resin is a class of important thermosetting resins that includes many types. Because of its good heat resistance, mechanical properties and manufacturability, it has been widely used in many fields. It is currently the most commonly used carbon fiber composite material. One of the base resins. [0003] Resin Transfer Molding (RTM) is a process method in which resin is injected into a closed mold to infiltrate reinforcing materials and then cured. It has the characteristics of high production efficiency, good product quality, and strong mechanical properties. This process generally adopts a two-component epoxy resin system, and the two components are fully mixed before being injected into a closed mold during use. However, due to the slow reaction of the two components ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K9/10C08K5/13C08K5/524C08G59/58B29C35/02
Inventor 杨刚孟秀青王建军康建忠王伟红潘洋高磊
Owner CHINA NAT BLUESTAR (GRP) CO LTD
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