CN105504682A - Foam composition with epoxy group structure and preparation method and application thereof - Google Patents
Foam composition with epoxy group structure and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/18—Binary blends of expanding agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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
The present invention relates to a kind of epoxy group(ing) structural foam composition, be specifically related to a kind of epoxy group(ing) structural foam composition, its preparation method and application.
Background technology
Epoxy resin structural foam is a kind of low density foam, low water-intake rate, shrinkability is had after solidification, have good cohesiveness and chemical stability to metallic substance, therefore epoxy resin structural foam is used in traffic and the building fields such as automobile, space flight and aviation, sea transport usually simultaneously.
In recent years, automotive light weight technology becomes the effective measure reducing motor vehicle emission, raising efficiency of combustion, is also the Main way of automotive material development, causes plastics consumption in the car to rise rapidly.While realizing car load lightweight object, the security of car load is also the principal element that must consider, so need a kind of material with high-strength light feature, realizes the light-weighted requirement of car load.
Epoxy group(ing) structural foam has the advantages that quality is light, strength and stiffness are high, car load uses and not only can alleviate complete vehicle weight, can also improve the absorption of vehicle frame to energy in the event of a collision simultaneously, thus improve the security of car load.Many researchists have done many research in epoxy construction foam both at home and abroad, but often along with the density of material reduces, cause the mechanical strength of material significantly to decline, and well can not play the effect of epoxy construction foam.
The people such as P.M.Stefani are at JournalofAppliedPolymerScience, 2003, in 90 (11): 2992-2996, describe the change of compressive strength with density of epoxy resin structural foam, when density is 0.3 time, compressive strength is 1.8MPa, and when density is 0.6 time, compressive strength is 5.5MPa; The people such as M.V.Alonso are at JournalofAppliedPolymerScience, 2006, in 102 (4): 3266-3272, the density describing epoxy resin structural foam adopts different fibers on the impact of material mechanical performance 0.3 time, no matter now adopt glass fibre or the aramid fiber of which kind of length, compressive strength is all lower than 3MPa.
For this reason, develop a kind of raw material and be easy to get, the epoxy group(ing) structural foam that mechanical property is high is necessary for the application of widening epoxy resin.
Summary of the invention
For above deficiency, the invention provides a kind of epoxy group(ing) structural foam composition, said composition raw material is easy to get, because composition is epoxy group(ing) structure, to metal, there is high cohesive force, after hot setting, the expansion ratio of material at 0.6-2.0 doubly, compared with existing epoxy foam material, has very high shear strength and compressive strength.
Present invention also offers a kind of preparation method of epoxy group(ing) structural foam composition, by being added by raw material substep, processing is mediated, solidification has obtained this kind of foam composition after foaming, and its working method is simple.
Present invention also offers the application of this kind of epoxy group(ing) structural foam composition on other vehicles that can collide such as automobile, aircraft and mechanical means, it can be used for the safety in utilization of raising equipment.
The technical scheme that the present invention takes is:
A kind of epoxy group(ing) structural foam composition, containing following material and weight part:
Described bisphenol A type epoxy resin is solid or liquid epoxies, and epoxy equivalent (weight) is 275-590 gram/equivalent.
Described epoxy resin toughener is acrylic acid-grafted polyolefine and/or maleic anhydride stem grafting polyolefin.Be preferably one or more in ethylene methyl methacrylate multipolymer, alkene-glycidyl methacrylate copolymer, ethylene-methyl acrylate-glyceryl methacrylate terpolymer.
Described whipping agent is one or more in Cellmic C 121,4,4-OBSH, expandable microspheres, sodium bicarbonate; Preferred Cellmic C 121 and/or expandable microspheres.
Described Dyhard RU 100 class solidifying agent is Dicyanodiamide.
Described ureas curing catalyst is N-(3,4-dichlorophenyl)-N ', N '-dimethyl urea and/or N-phenyl-N, N '-dimethyl urea.
Described filler is one or more in micron order or nano level calcium carbonate, talcum powder, wollastonite; Be preferably nanometer grade calcium carbonate.
Described fiber is glass fibre, aramid fiber, carbon fiber or trevira; Be preferably glass fibre.
Described thixotropic agent is aerosil.As the aerosil of thixotropic agent due to hydrogen bond can be formed in raising system in low-shear viscosity, thus play thickening power.
Present invention also offers the preparation method of above-mentioned epoxy group(ing) structural foam composition, described preparation method comprises the following steps: under 70-100 DEG C of condition, the bisphenol A type epoxy resin of formula ratio, epoxy resin toughener is mixed, and processing is mediated; Then add blending in of fibers even, processing is mediated; Add whipping agent again, filler mixes, processing is mediated; Then add thixotropic agent, mix, processing is mediated; Finally add Dyhard RU 100 class solidifying agent and ureas curing catalyst, mix, processing is mediated; After fixing foaming.
The time that described processing is mediated is 15-25min.
The temperature of described solidification foaming is 150-190 DEG C, is preferably 160-180 DEG C.
The time of described solidification foaming is 20-40min.
Present invention also offers the application of above-mentioned epoxy group(ing) structural foam composition on the vehicles and mechanical means.
In epoxy group(ing) structural foam composite formula component provided by the invention, epoxy resin toughener can improve the toughness of epoxy resin-base; Expandable microspheres can give material tiny abscess, coordinates the material after solidification can be made to foam to have high compressive strength with fiber.
In preparation method disclosed by the invention, because some epoxy resin toughener and fiber not easily disperse in the epoxy, so first epoxy resin is mixed with toughner, fiber is added again after guarantee mixes, after blending in of fibers is even, adds filler and whipping agent, add thixotropic agent after mixing and system viscosity is adjusted, finally add solidifying agent and promotor, this is because prevent system from solidifying and finally adding curing system in the process of mediating processing.
Composition disclosed by the invention is the foam composition of epoxy group(ing) structure, it has high cohesive force to metal, after hot setting, the expansion ratio of material at 0.6-2.0 doubly, compared with existing epoxy group(ing) structural foam, it has very high shear strength and compressive strength, and working method is simple simultaneously.
The foam composition of epoxy group(ing) structure disclosed by the invention can be used in automobile, aircraft as strongthener as structural foam, use in vehicle complete vehicle and not only can alleviate complete vehicle weight, the absorption of vehicle frame to energy can also be improved in the event of a collision simultaneously, thus improve the security of car load, in addition, this product is also applicable in other vehicles that may collide and mechanical means, for improving the safety in utilization of the vehicles and mechanical means.
Embodiment
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part as shown in table 1:
Table 1: raw material and weight part contained by epoxy group(ing) structural foam composition
Material therefor of the present invention and source:
Bisphenol A type epoxy resin: epoxy equivalent (weight) is 275-590 gram/equivalent, commercially available prod;
Epoxy resin toughener: model is respectively GB19D, GB17D, all purchased from Foshan Ge Bang polymer Science and Technology Ltd.;
AC whipping agent: commercially available prod;
CelegonOT whipping agent: whipping agent, purchased from LionChemical company;
Expandable microspheres: model is 093DU120, purchased from Akzo Nobel (AkzoNobel) efficient chemical product company limited;
Glass fibre: commercially available prod;
Calcium carbonate: commercially available prod;
Talcum powder: commercially available prod;
Aerosil: commercially available prod;
Dyhard RU 100 class solidifying agent: model is Dyhard100S, purchased from German Degussa (Degussa) company;
Ureas curing catalyst: model is respectively UR200, UR500, all purchased from German Degussa (Degussa) company;
Embodiment 1
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in the embodiment 1 in table 1.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 95 DEG C of conditions, by the bisphenol A type epoxy resin of formula ratio, GB19D epoxy resin toughener adds in kneader, mix, 20min is mediated in processing, then glass fibre is added, 20min is mediated in processing, after mixing, add AC whipping agent, 093DU120 expandable microspheres, 1250 order calcium carbonate, 2000 order talcum powder, mix, 20min is mediated in processing, then aerosil is added, 20min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR500 ureas curing catalyst, 20min is mediated in processing, after mixing, at 170 DEG C, toast 20min be cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
Embodiment 2
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in table 1, embodiment 2.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 70 DEG C of conditions, by the bisphenol A type epoxy resin of formula ratio, GB19D epoxy resin toughener adds in kneader, mix, 15min is mediated in processing, then glass fibre is added, 20min is mediated in processing, after mixing, add AC whipping agent, 093DU120 expandable microspheres, 1250 order calcium carbonate, 2000 order talcum powder, mix, 15min is mediated in processing, then aerosil is added, 20min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR500 ureas curing catalyst, 15min is mediated in processing, after mixing, at 160 DEG C, toast 25min be cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
Embodiment 3
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in the embodiment 3 in table 1.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 80 DEG C of conditions, by the bisphenol A type epoxy resin of formula ratio, GB17D epoxy resin toughener adds in kneader, mix, 15min is mediated in processing, then glass fibre is added, 20min is mediated in processing, after mixing, add AC whipping agent, 093DU120 expandable microspheres, 1250 order calcium carbonate, 2000 order talcum powder, mix, 20min is mediated in processing, then aerosil is added, 20min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR200 ureas curing catalyst, 25min is mediated in processing, after mixing, at 180 DEG C, toast 30min be cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
Embodiment 4
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in the embodiment 4 in table 1.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 90 DEG C of conditions, by the bisphenol A type epoxy resin of formula ratio, GB19D epoxy resin toughener adds in kneader, mix, 25min is mediated in processing, then glass fibre is added, 25min is mediated in processing, after mixing, add CelegonOT whipping agent, 093DU120 expended microsphere, 1250 order calcium carbonate, 2000 order talcum powder, mix, 25min is mediated in processing, then aerosil is added, 25min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR200 ureas curing catalyst, 25min is mediated in processing, after mixing, at 170 DEG C, toast 35min be cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
Embodiment 5
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in the embodiment 5 in table 1.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 100 DEG C of conditions, by the bisphenol A type epoxy resin of formula ratio, GB17D epoxy resin toughener adds in kneader, mix, 20min is mediated in processing, then glass fibre is added, 20min is mediated in processing, after mixing, add AC whipping agent, 093DU120 expandable microspheres, 1250 order calcium carbonate, 2000 order talcum powder, mix, 20min is mediated in processing, then aerosil is added, 20min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR500 ureas curing catalyst, 20min is mediated in processing, after mixing, at 190 DEG C, toast 20min be cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
Embodiment 6
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in the embodiment 6 in table 1.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 85 DEG C of conditions, by the bisphenol A type epoxy resin of formula ratio, GB17D epoxy resin toughener adds in kneader, mix, 20min is mediated in processing, then glass fibre is added, 20min is mediated in processing, after mixing, add AC whipping agent, 093DU120 expandable microspheres, 1250 order calcium carbonate, 2000 order talcum powder, mix, 20min is mediated in processing, then aerosil is added, 20min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR200 ureas curing catalyst, 20min is mediated in processing, after mixing, at 175 DEG C, toast 35min be cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
Embodiment 7
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in the embodiment 7 in table 1.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 75 DEG C of conditions, by the bisphenol A type epoxy resin of formula ratio, GB19D epoxy resin toughener adds in kneader, mix, 20min is mediated in processing, then glass fibre is added, 25min is mediated in processing, after mixing, add CelegonOT whipping agent, 093DU120 expandable microspheres, 1250 order calcium carbonate, 2000 order talcum powder, mix, 20min is mediated in processing, then aerosil is added, 20min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR500 ureas curing catalyst, 20min is mediated in processing, after mixing, at 165 DEG C, toast 40min be cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
Comparative example 8
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in the comparative example 8 in table 1.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 95 DEG C of conditions, the bisphenol A type epoxy resin of formula ratio is added in kneader, mix, 20min is mediated in processing, then glass fibre is added, 20min is mediated in processing, after mixing, add AC whipping agent, the inflatable foam microspheres of 093DU120, 1250 order calcium carbonate, 2000 order talcum powder, mix, 20min is mediated in processing, then aerosil is added, 20min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR500 ureas curing catalyst, 20min is mediated in processing, after mixing, at 170 DEG C, toast 20min be cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
Comparative example 9
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in the comparative example 9 in table 1.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 95 DEG C of conditions, by the bisphenol A type epoxy resin of formula ratio, GB19D epoxy resin toughener adds in kneader, mix, 20min is mediated in processing, add AC whipping agent, 093DU120 expandable microspheres, 1250 order calcium carbonate, 2000 order talcum powder, mix, 20min is mediated in processing, then aerosil is added, 20min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR500 ureas curing catalyst, 20min is mediated in processing, after mixing, at 170 DEG C, toast 20min be cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
Comparative example 10
A kind of epoxy group(ing) structural foam composition, raw material contained by it and weight part are as shown in the comparative example 10 in table 1.
The preparation method of described epoxy group(ing) structural foam composition is:
Under 95 DEG C of conditions, by the bisphenol A type epoxy resin of formula ratio, GB19D epoxy resin toughener adds in kneader, promotor, 20min is mediated in processing, after mixing, mix at 170 DEG C, 20min is mediated in processing, add AC whipping agent, 1250 order calcium carbonate, 2000 order talcum powder, mix, 20min is mediated in processing, then aerosil is added, 20min is mediated in processing, after mixing, add Dyhard100S Dyhard RU 100 class solidifying agent, UR500 ureas solidification baking 20min is cured foaming, then Mechanics Performance Testing is carried out, its mechanical experimental results is in table 2.
The performance test results of the epoxy group(ing) structural foam composition prepared according to the preparation method of each embodiment and comparative example is as shown in table 2:
Table 2
Comparative example 8-10 is relative to embodiment 1, eliminate the epoxy resin toughener in composition, glass fibre, expandable microspheres three components respectively, comparative example 1, can find, any one component removed in these three components all can cause the obvious reduction of the shearing resistance of said composition and compressive strength.Can illustrate thus, the component of composition disclosed by the invention can give the higher shearing resistance of composition and compressive strength.
Above-mentioned reference embodiment is to epoxy group(ing) structural foam composition; the detailed description that its preparation method and application are carried out; illustrative instead of determinate; several embodiments can be listed according to institute's limited range; therefore in the change do not departed under general plotting of the present invention and amendment, should belong within protection scope of the present invention.
Claims (10)
1. an epoxy group(ing) structural foam composition, is characterized in that, described foam composition contains following material and weight part:
2. foam composition according to claim 1, is characterized in that, described bisphenol A type epoxy resin is solid or liquid epoxies, and epoxy equivalent (weight) is at 275-590 gram/equivalent.
3. foam composition according to claim 1 and 2, is characterized in that, described epoxy resin toughener is acrylic acid-grafted polyolefine and/or maleic anhydride stem grafting polyolefin.
4. foam composition according to claim 3, it is characterized in that, described epoxy resin toughener is one or more in ethylene methyl methacrylate multipolymer, alkene-glycidyl methacrylate copolymer, ethylene-methyl acrylate-glyceryl methacrylate terpolymer.
5. the foam composition according to claim 1 or 2 or 4, is characterized in that, described whipping agent is one or more in Cellmic C 121,4,4-OBSH, expandable microspheres, sodium bicarbonate.
6. the foam composition according to claim 1 or 2 or 4, is characterized in that, described ureas curing catalyst is N-(3,4-dichlorophenyl)-N ', N '-dimethyl urea and/or N-phenyl-N, N '-dimethyl urea.
7. the foam composition according to claim 1 or 2 or 4, is characterized in that, described filler is one or more in micron order or nano level calcium carbonate, talcum powder, wollastonite.
8. the foam composition according to claim 1 or 2 or 4, is characterized in that, described fiber is glass fibre, aramid fiber, carbon fiber or trevira.
9. the preparation method of foam composition according to claim 1, is characterized in that, described preparation method comprises the following steps: under 70-100 DEG C of condition, the bisphenol A type epoxy resin of formula ratio, epoxy resin toughener is mixed, and processing is mediated; Then add blending in of fibers even, processing is mediated; Add whipping agent again, filler mixes, processing is mediated; Then add thixotropic agent, mix, processing is mediated; Finally add Dyhard RU 100 class solidifying agent and ureas curing catalyst, mix, processing is mediated; After fixing foaming.
10. the application of foam composition according to claim 1 on the vehicles and mechanical means.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106633654A (en) * | 2016-12-19 | 2017-05-10 | 韩进 | Truck glass fiber reinforced plastic and preparation method thereof |
| CN107674384A (en) * | 2017-10-27 | 2018-02-09 | 保光(天津)汽车零部件有限公司 | Automobile using low bulk structural reinforcement material, structural reinforcement and preparation method thereof |
| CN107880491A (en) * | 2017-12-21 | 2018-04-06 | 河南省科学院化学研究所有限公司 | A kind of epoxy foams material |
| CN108300392A (en) * | 2018-02-08 | 2018-07-20 | 优链新材料科技（上海）有限公司 | A kind of automobile self-adhering-type expansion structure adhesive tape and preparation method thereof |
| CN108752871A (en) * | 2018-05-30 | 2018-11-06 | 中国科学院化学研究所 | A kind of epoxy foams and preparation method thereof |
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| CN113248873A (en) * | 2021-06-25 | 2021-08-13 | 江苏中科聚合新材料产业技术研究院有限公司 | Low-density conductive wave-absorbing epoxy resin foam material and preparation method thereof |
| CN113388339A (en) * | 2021-06-21 | 2021-09-14 | 海程新材料(芜湖)有限公司 | Expansion type structure adhesive tape for automobile and rail transit and preparation method thereof |
| CN113715130A (en) * | 2021-09-07 | 2021-11-30 | 河南佳诺威木业有限公司 | Production process of MDF low-density high-strength plate |
| CN113801434A (en) * | 2021-09-24 | 2021-12-17 | 海南必凯水性新材料有限公司 | High-impact-resistance foaming epoxy resin material and preparation method thereof |
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