Foam composition with epoxy group structure and preparation method and application thereof

A composition and epoxy-based technology, which is applied in the field of epoxy-based structural foam compositions, can solve the problems such as the decrease of material mechanical strength, and achieve the effects of reducing the weight of the whole vehicle, improving the safety of use and simple processing method.

Inactive Publication Date: 2016-04-20
YOULIAN NEW MATERIAL TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many researchers at home and abroad have done a lot of research on epoxy structural foam. However, as the density of the material decreases, the mechanical strength of the material decreases significantly, and the role of epoxy structural foam cannot be played well.

Method used

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  • Foam composition with epoxy group structure and preparation method and application thereof
  • Foam composition with epoxy group structure and preparation method and application thereof
  • Foam composition with epoxy group structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] An epoxy-based structural foam composition, which contains raw materials and parts by weight as shown in Example 1 in Table 1.

[0048] The preparation method of described epoxy-based structural foam composition is:

[0049] Under the condition of 95°C, add bisphenol A type epoxy resin and GB19D epoxy resin toughening agent into the kneader, mix well, process and knead for 20 minutes, then add glass fiber, process and knead for 20 minutes, after mixing evenly, Add AC foaming agent, 093DU120 expanded microspheres, 1250 mesh calcium carbonate, 2000 mesh talc powder, mix well, process and knead for 20 minutes, then add fumed silica, process and knead for 20 minutes, after mixing evenly, add Dyhard100S dicyandiamide to cure agent, UR500 urea curing accelerator, processed and kneaded for 20 minutes, mixed evenly, baked at 170°C for 20 minutes to cure and foam, and then tested the mechanical properties. The results of the mechanical properties test are shown in Table 2.

Embodiment 2

[0051] An epoxy-based structural foam composition, which contains raw materials and parts by weight as shown in Example 2 in Table 1.

[0052] The preparation method of described epoxy-based structural foam composition is:

[0053]Under the condition of 70°C, add bisphenol A type epoxy resin and GB19D epoxy resin toughening agent into the kneader, mix evenly, process and knead for 15 minutes, then add glass fiber, process and knead for 20 minutes, after mixing evenly, Add AC foaming agent, 093DU120 expanded microspheres, 1250 mesh calcium carbonate, 2000 mesh talc powder, mix well, process and knead for 15 minutes, then add fumed silica, process and knead for 20 minutes, after mixing evenly, add Dyhard100S dicyandiamide to cure agent, UR500 urea curing accelerator, processed and kneaded for 15 minutes, mixed evenly, baked at 160°C for 25 minutes to cure and foam, and then tested the mechanical properties. The results of the mechanical properties test are shown in Table 2.

Embodiment 3

[0055] An epoxy-based structural foam composition, which contains raw materials and parts by weight as shown in Example 3 in Table 1.

[0056] The preparation method of described epoxy-based structural foam composition is:

[0057] Under the condition of 80°C, add bisphenol A type epoxy resin and GB17D epoxy resin toughening agent into the kneader, mix evenly, process and knead for 15 minutes, then add glass fiber, process and knead for 20 minutes, after mixing evenly, Add AC foaming agent, 093DU120 expanded microspheres, 1250 mesh calcium carbonate, 2000 mesh talc powder, mix well, process and knead for 20 minutes, then add fumed silica, process and knead for 20 minutes, after mixing evenly, add Dyhard100S dicyandiamide to cure agent, UR200 urea curing accelerator, processed and kneaded for 25 minutes, mixed evenly, baked at 180°C for 30 minutes to cure and foam, and then tested the mechanical properties. The results of the mechanical properties test are shown in Table 2.

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Abstract

Th invention discloses a foam composition with an epoxy group structure and a preparation method and application thereof. The foam composition with the epoxy group structure is prepared from, by weight, 100 parts of bisphenol-A epoxy resin, 15-45 parts of epoxy resin toughening agent, 1-7 parts of foaming agent, 1-15 parts of dicyandiamide curing agent, 0.2-5 parts of urea curing accelerator, 28-80 parts of filler, 15-40 parts of fibers and 1-10 parts of thixotropic agent. The foam composition is prepared by adding the raw materials step by step and then conducting processing kneading and curing foaming. Compared with an existing epoxy foaming material, the foam composition has higher shearing strength and compressive strength, and meanwhile the processing method is simple; the foam composition can serve as structural foam to be used as a reinforcing material in automobiles or planes, when the foam composition is used in a whole automobile, the weight of the whole automobile can be reduced, energy absorption of an automobile framework can further be improved under the collision situation, and therefore the safety of the whole automobile is improved. In addition, the foam composition can be applied to other transportation and mechanical equipment which are possibly subjected to collisions.

Description

technical field [0001] The invention relates to an epoxy-based structural foam composition, in particular to an epoxy-based structural foam composition, its preparation method and application. Background technique [0002] Epoxy resin structural foam is a low-density foam. It has low water absorption and shrinkage after curing, and has good adhesion and chemical stability to metal materials. Therefore, epoxy resin structural foam is usually used in automobiles and aerospace. Transportation and construction fields such as aviation and ocean transportation. [0003] In recent years, automobile lightweight has become an effective measure to reduce automobile emissions and improve combustion efficiency, and it is also the main direction for the development of automobile materials, resulting in a rapid increase in the amount of plastic used in automobiles. While achieving the purpose of reducing the weight of the vehicle, the safety of the vehicle is also the main factor that mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L51/06C08K13/04C08K7/14C08K3/26C08K3/34C08K3/36C08J9/10C08J9/04
CPCC08L63/00C08J9/04C08J9/103C08J2203/18C08J2363/00C08J2451/06C08L2203/14C08L51/06C08K13/04C08K7/14C08K2003/265C08K3/34C08K3/36
Inventor 谢宇吴志超张立伟
Owner YOULIAN NEW MATERIAL TECH SHANGHAI CO LTD
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