Polyurethane-structure-modified bisphenol F epoxy resin composite, as well as preparation and application thereof

A technology of epoxy resin and polyurethane, applied in textiles and papermaking, fiber treatment, fiber type, etc., can solve problems such as lack of fiber opening and expansion performance, restriction of sizing agent engineering application, poor clustering and wear resistance, etc. Achieve the effects of improving process permeability, improving clustering and wear resistance, and realizing industrial production

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, judging from the current application status, when the sizing agent prepared by using the above resin formula is applied to carbon fiber and graphite fiber, it has poor bundling and abrasion resistance under the condition of normal fiber sizing amount (<1.40%), and poor fiber opening and expansion properties. Problems such as lack of web performance and insufficient resilience toughness, especially in the engineering application of carbon fibers with 12K and above tow numbers, restrict the actual engineering application of the above-mentioned sizing agents

Method used

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  • Polyurethane-structure-modified bisphenol F epoxy resin composite, as well as preparation and application thereof
  • Polyurethane-structure-modified bisphenol F epoxy resin composite, as well as preparation and application thereof
  • Polyurethane-structure-modified bisphenol F epoxy resin composite, as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-12

[0024] Put the quantitative epoxy resin mixture in a 250ml four-neck flask with a mechanical stirring device, heat to 110°C, control the vacuum pressure at 100-0.1mmHg, and vacuum dehydrate for 2 hours until no bubbles are generated. Cool down to 70°C, remove the vacuum device, and insert a condenser tube. Under the protection of high-purity nitrogen, a quantitative amount of hexamethylene diisocyanate (HDI) was slowly added dropwise into the flask with a micro metering pump. After the dropwise addition, it was reacted at 70°C for 1 hour, and then the temperature was raised to 95°C. ℃ for more than 2 hours, sampling for infrared analysis, when the result shows that there is no -NCO group, a polyurethane structure-modified bisphenol F epoxy resin composition is prepared. The type and amount of epoxy resin mixture used, and the amount of hexamethylene diisocyanate (HDI) are shown in Table 1.

[0025] Table 1, raw material quality table for reaction

[0026]

[0027]

Embodiment 13-24

[0029] Put the quantitative epoxy resin mixture in a 250ml four-neck flask with a mechanical stirring device, heat to 110°C, control the vacuum pressure at 100-0.1mmHg, and vacuum dehydrate for 2 hours until no bubbles are generated. Cool down to 70°C, remove the vacuum device, and insert a condenser tube. Under the protection of high-purity nitrogen, a quantitative amount of isophorone diisocyanate (IPDI) was slowly added dropwise to the flask with a micro metering pump. After the dropwise addition, it was reacted at 70°C for 1 hour, and then heated to 95°C After reacting for more than 2 hours, samples were taken for infrared analysis, and when the results showed that there was no -NCO group, a polyurethane structure-modified bisphenol F epoxy resin composition was prepared. The type and amount of epoxy resin mixture used, and the amount of isophorone diisocyanate (IPDI) are shown in Table 2.

[0030] Table 2, raw material quality table for reaction

[0031]

Embodiment 25-36

[0033] Put the quantitative epoxy resin mixture in a 250ml four-neck flask with a mechanical stirring device, heat to 110°C, control the vacuum pressure at 100-0.1mmHg, and vacuum dehydrate for 2 hours until no bubbles are generated. Cool down to 50°C, remove the vacuum device, and insert a condenser tube. Under the protection of high-purity nitrogen, a quantitative amount of diphenylmethane diisocyanate (MDI) was slowly added dropwise into the flask with a micrometering pump. After the dropwise addition, it was reacted at 50°C for 1 hour, and then heated to 85°C. After reacting for more than 2 hours, samples were taken for infrared analysis, and when the results showed that there was no -NCO group, a polyurethane structure-modified bisphenol F epoxy resin composition was prepared. The type and amount of epoxy resin mixture used, and the amount of diphenylmethane diisocyanate (MDI) are shown in Table 3.

[0034] Table 3, raw material quality table for reaction

[0035]

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Abstract

The invention relates to a polyurethane-structure-modified bisphenol F epoxy resin composite which comprises the following components in percentage by mass: 88-99% of bisphenol F epoxy resin and 1-12% of isocyanate. The preparation method of the polyurethane-structure-modified bisphenol F epoxy resin composite comprises the following steps: vacuumizing and dewatering the bisphenol F epoxy resin reactant at high temperature until no foam is generated; cooling, under the protection of nitrogen, adding the isocyanate reactant, reacting for 1-2 hours at 50-70 DEG C in a stirring manner, raising the temperature to 80-100 DEG C, and continuing the reaction for more than 2 hours to prepare the polyurethane-structure-modified bisphenol F epoxy resin composite. According to the invention, through the method of in-situ modification of the epoxy resin composite by the polyurethane structure, the polarity carbamic acid ester group is introduced to be applied to preparation of a carbon fiber sizing agent, so that the technological permeability of the sizing agent is improved, the sizing technology capability and the bundling and the wear resistance of the carbon fiber are improved, engineering application of the carbon fiber with 12K and more tows and manufacture of a high-performance composite material are facilitated.

Description

technical field [0001] The invention belongs to the field of modification and preparation of epoxy resin in organic polymer materials, and in particular relates to a bisphenol F epoxy resin composition modified by polyurethane structure and its preparation and application. Background technique [0002] Epoxy resin has the advantages of high strength, excellent bonding performance, chemical stability, easy processing and low cost, and its polymer composite materials are widely used in many industrial fields. However, due to the high cross-linking density of pure epoxy resin after curing, there are disadvantages such as large internal stress, brittle cured material, and poor heat resistance, which limit its application in fiber-reinforced composite materials. The interface layer plays an important role in the composite material. It is the transition layer connecting the reinforcement and the matrix, and it is also a bridge for transferring stress, so its structure and performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/58D06M15/564D06M101/40
CPCC08G18/58D06M15/564D06M2101/40D06M2200/40
Inventor 季春晓刘瑞超黄翔宇常丽钱波沈辉王海姜子奇翁丽萍
Owner CHINA PETROLEUM & CHEM CORP
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