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Epoxy resin flexibilizer as well as preparation method and application thereof

A technology of epoxy resin and toughening agent, which is applied in the field of epoxy resin toughening agent and its preparation, can solve the problem that the source of raw materials stays in the theoretical research stage, and achieve the effects of convenient industrial production, controllable structure and low price

Inactive Publication Date: 2012-12-26
ZHANGJIAGANG KABANG NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two methods only stay in the theoretical research stage due to the limited source of raw materials.
At present, there are few reports on the use of polypropylene oxide to toughen epoxy resins.

Method used

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  • Epoxy resin flexibilizer as well as preparation method and application thereof
  • Epoxy resin flexibilizer as well as preparation method and application thereof
  • Epoxy resin flexibilizer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0031] As shown in Table 1, under stirring conditions, react polyphosphoric acid and polyether polyol in a water bath at 80°C for 5 hours, and then add 0.5ml of H 2 o 2 Decolorize for 1 hour, cool and discharge to obtain the toughening agent;

[0032] Its chemical structure is as shown in formula (1), wherein: n=50 of embodiment 1, m=0; n=17 of embodiment 2, m=0; n=30 of embodiment 3, m=4; Implementation In Example 4, n=30 and m=4.

[0033] Table 1 polyether polyol and polyphosphoric acid reaction material table

[0034]

[0035] (Note: In the above polyphosphoric acid, P 2 o 5 The content is 82% by weight)

[0036] figure 1 is a toughening agent 31 P nuclear magnetic spectrum, the spectrum shows that in addition to polyether phosphoric acid mono / polyether phosphoric acid diester and phosphoric acid, there are other products generated in the reaction product.

[0037] According to the chemical shift of the phosphorus-containing compound, the applicant deduces that t...

Embodiment 5

[0041] As shown in Table 2, polyether polyol was added dropwise to phosphorus oxychloride (POCl 3 ) in anhydrous tetrahydrofuran solution, heated up to 60° C., condensed and refluxed for 5 hours, and the solvent was removed to obtain the toughening agent; its chemical structure is shown in formula (1), wherein: n=50, m=0;

[0042] Table 2 polyether polyol and phosphorus oxychloride reaction material list

[0043]

[0044] figure 2 Be the toughening agent prepared with example 5 31 P NMR spectrum. (See figure 2 )

Embodiment 7

[0046] The following table is the viscosity data of the epoxy resin modified by the toughening agent prepared in different examples. It can be seen from the data that after the toughening agent is added to the epoxy resin, the viscosity of the epoxy resin can be significantly reduced , Improve the process performance of epoxy resin.

[0047] Table 3 Viscosity of modified toughening agent

[0048]

[0049] (Note: The weight ratio of toughener to epoxy resin is 0.2:1)

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Abstract

The invention discloses an epoxy resin flexibilizer as well as a preparation method and application thereof. The preparation method comprises the following step of carrying out phosphoric acid esterification on polyether glycol and a phosphorylation reagent to obtain the epoxy resin flexibilizer. In the invention, the raw materials such as the polyether glycol and the like are common basic materials in chemical industry with extensive sources, controllable structures, low cost, lower viscosity than epoxy resin, and not high viscosity even after being reacted with polyphosphoric acid, and the viscosity of epoxy resin prepolymer can be controlled through controlling the feed ratio so as to improve the manufacturability of the epoxy resin. The process of preparing the flexibilizer is simple, adopts temperate condition, is simple and convenient for operation and is convenient for industrialized production. The epoxy resin flexibilizer has the following chemical structure.

Description

technical field [0001] The invention relates to an epoxy resin toughening agent and a preparation method thereof. Background technique [0002] Epoxy resin is one of the most widely used engineering materials, widely used in coatings, casting materials, molding materials, adhesives and other fields, but its brittleness and poor impact resistance limit its application in some fields . Therefore, the toughening research of epoxy resin has become one of the hot topics in the field of epoxy resin. [0003] The common method of toughening epoxy resin is to introduce the second phase, and use the second phase to absorb the crack energy that can lead to the destruction of epoxy resin to achieve the purpose of toughening, such as rubber elastomer toughening, rigid particle toughening and Core-shell structure polymer toughening, etc., among which rubber elastomer is currently the most successful epoxy resin toughening material, some rubber elastomers such as carboxyl-terminated / a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/327C08L63/00C08L63/02C08L71/02
Inventor 朱麟勇王永三李欣欣朱麟润
Owner ZHANGJIAGANG KABANG NEW MATERIALS