Composition for manufacturing vitrimer resins of epoxy/anhydride type comprising polyol

A composition and polyol technology, applied in the field of compositions, can solve the problems of inability to help fabric impregnation and the like

Inactive Publication Date: 2017-02-22
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, molten thermoplastic resins have a viscosity that is generally too high to facilitate the impregnation of fabrics for the purpose of obtaining composites

Method used

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  • Composition for manufacturing vitrimer resins of epoxy/anhydride type comprising polyol
  • Composition for manufacturing vitrimer resins of epoxy/anhydride type comprising polyol
  • Composition for manufacturing vitrimer resins of epoxy/anhydride type comprising polyol

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0167] The preparation of the compositions can be carried out in any type of mixer known to a person skilled in the art. In particular, this can be carried out by bringing into contact the ingredients described for the kit to form the composition according to the invention.

[0168] Shaping can be performed by any technique known to a person skilled in the art in the field of thermosetting resins, in particular by moulding. Notably, the invention makes it possible to also provide other molding modes such as casting, filament winding, continuous molding or molding between film coatings, injection, pultrusion, resin transfer molding or RTM, reaction Injection molding (or RIM) or any other method known to those skilled in the art, as described in: "Epoxy Polymer" edited by J.P.Pascault and R.J.J.Williams, Wiley-VCH, Weinheim 2010 or R.Perrin and "Chimie industrielle" ["Industrial chemistry"] by J.P. Scharff, Dunod, Paris 1999.

[0169] Forming may consist of placing in powder o...

Embodiment 2

[0218] Example 2: Synthesis of epoxy-anhydride network in the presence of 1% TBD and polyol

[0219] Three samples were prepared in the same manner as the sample of Example 1 except that the polyol was added to the reaction mixture and the anhydride was introduced in liquid form. The Tg and storage modulus G' of the materials thus obtained were also measured and summarized in Table 1 below.

[0220] Table 1

[0221] sample 2a 2b 2c Polyol glycerin glycerin TMP* mol% OH / 环氧

10 20 10 Tg(°C) 146 144 144 G'(MPa) 15 15 16.7

[0222] *Trimethylolpropane

[0223] Note that these polyols make it possible to slightly increase the storage modulus of the materials, which reflects their crosslink density, without substantially affecting their Tg. This suggests that the polyol has been incorporated into the polymer network and does not act like a plasticizer, contrary to what would have been expected.

Embodiment 4

[0226] Example 4: Synthesis of epoxy-anhydride network in the presence of 1% DBU and polyol

[0227] Sample (4) was prepared in the same manner as the sample of Example 3, except that polyol (TMP) was added to the reaction mixture in liquid form. The material exhibited a Tg of 132°C and a storage modulus of 12.4 MPa at 200°C.

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Abstract

The present invention relates to a composition containing, besides a thermosetting resin of epoxy type and / or a hardener, at least one vitrimer effect catalyst and at least one polyol selected from linear, branched or cyclic alkanes containing at least two hydroxyl functions. This composition enables the manufacture of vitrimer resins, that is to say of resins that can be deformed in the thermoset state. It also relates to an object obtained from this composition and also to a process for deforming this object.

Description

technical field [0001] The invention relates to compositions comprising, in addition to a thermosetting resin and / or a curing agent of the epoxy type, at least one polyol and at least one vitrimer effect catalyst. This composition allows the manufacture of vitrimer resins, ie resins which are deformable in the thermoset state. Background technique [0002] Thermosetting resins (or thermosetting materials) have the advantage of possessing high mechanical strength as well as high heat and chemical resistance, and thus can replace metals in some applications. They have the advantage of being lighter than metal. They can also be used as a matrix in composites, as an adhesive and as a coating. Among the thermosetting polymers, mention may be made of: unsaturated polyesters, phenolics, polyepoxides, polyurethanes and aminoplasts. [0003] Conventional thermosetting resins must be processed; in particular, they must be molded to immediately obtain a shape suitable for end use. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/42C08L63/00C08K5/053
CPCC08G59/42C08K5/053C08L63/00B29C67/24B29K2063/00C08L2201/08C08L2203/30
Inventor C.迪凯纳M.梅拉斯S.博德莱斯
Owner ARKEMA FRANCE SA
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