CN102504415A - Light-colored microporous EPDM sponge rubber and preparation method thereof - Google Patents
Light-colored microporous EPDM sponge rubber and preparation method thereof Download PDFInfo
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Abstract
The invention relates to rubber and a preparation method thereof, and provides a light-colored microporous EPDM sponge rubber which is advantageous in uniform pore, large expansion ratio and less compression permanent deformation and is suitable for producing sealing strip products, and a simple and feasible preparation method thereof. The light-colored microporous EPDM sponge rubber is made from EPDM sponge rubber, foaming agents, reinforcing fillers, plasticizers, anti-aging agents, colorants, vulcanizers and other vulcanizing additives. The colorants may be rutile titanium dioxide, fluorescent whiteners and ultramarines; the foaming agents, such as azobisformamide (AC), 4,4'-oxydibenzenesulfonyl hydrazide (OBSH) and urea, are heated to decompose to release gases; the types and consumptions of vulcanizers and vulcanizing additives can be changed. The light-colored microporous EPDM sponge rubber can be used in combination with white building materials, and the application range of rubber materials is increased.
Description
Technical field
The present invention relates to a kind of rubber and preparation method thereof, particularly relate to a kind of light microvoid structure EPDM rubber sponge and preparation method thereof.
Background technology
The manufacturing of light-colour rubber goods is gordian techniquies.The light-colour rubber goods can enlarge the scope of application of elastomeric material greatly, can be used in combination with white and other light building materials or product.Chinese patent CN 1181307 A disclose a kind of PVC high pressure hose of white dyes and composition of base material and preparation method thereof used; After the described PVC high pressure hose of this patent adds white dyes; The glossiness of material improves; Whiteness and the brightness of using white dyes can improve polymer materials are described, are made material more attractive in appearance, meet the special occasions request for utilization.
The constituent of microvoid structure rubber sponge material and preparation and are applied to production practice by broad research.U.S. Patent application prospectus 20010044478A1 number (US 20010044478A1) discloses a kind of composition and preparation method of sponge Zylox.The characteristic of the described sponge Zylox of this patent is to utilize the microvoid structure sponge Zylox that aperture that the water of a kind of water and silicone oil-oily mixed emulsion is processed is little and be evenly distributed.U.S. Patent application prospectus 20090082477A1 number (US 20090082477A1) discloses a kind of component and preparation method of micropore elastomer material.The described micropore elastomer material of this patent of invention has good water-absorbent and elasticity.The described micropore elastomer material of this patent of invention can be obtained by solid polymeric material, and also can be has foamed polymer material to obtain.Traditional capillary copolymer material normally contains the harm surrounding material, but has good elasticity and water-absorbent.The characteristic of the described micropore elastomer material of this patent of invention is that harm surrounding material quality percentage is smaller or equal to 0.5%.
The traditional rubber seal bar does not have hygroscopic property, and shortcoming is more obvious under such as special use occasions such as double glazings.It is very necessary to study a kind of light latex foam products of hygroscopic property that combined.Have regular in the crystal structure of molecular sieve and uniform duct, this structure makes it have very strong wettability power.Simultaneously molecular sieve has reinforcing property preferably, has better strengthening action than the light calcium carbonate of homogenous quantities, talcum powder, potter's clay, kaolin etc., can be applied to serve as in the elastomeric material weighting agent and strengthening agent.
Summary of the invention
The object of the present invention is to provide a kind of light microvoid structure EPDM rubber sponge and preparation method thereof; The EPDM that a kind of abscess is even, expansion ratio is big, compression set is low rubber sponge is provided; Be suitable for processing the sealed strip product, and propose a kind of simple preparation method.
The objective of the invention is to realize through following technical scheme:
A kind of light microvoid structure EPDM rubber sponge is made up of terpolymer EP rubber, whipping agent, tinting material, white dyes, packing strengthening agent, vulcanizing agent and vulcanization accelerator, auxiliary agent, and the light EPDM rubber sponge of this kind comprises: the terpolymer EP rubber of 100 mass parts; 5.5-8.5 part vulcanizing agent and promotor, the filler of 110-115 part, 115 parts of molecular sieve powder; 15-20 part precipitated silica, 60-65 part softening agent and 6-7 part whipping agent, anti-aging agent 2-4.5 part; Tinting material Rutile type Titanium Dioxide 20-50 part, ultramarine 0.1-0.5 part, white dyes 2; 2'-(4; The 4'-diphenylethyllene-) two benzoxazoles (white dyes OB-1) 0.1-0.3 part, rubber processing aids is like vulcanization leveller, polar additive, moisture adsorbent and coupling agent.
Described a kind of light microvoid structure EPDM rubber sponge, described tinting material Rutile type Titanium Dioxide and ultramarine and white dyes OB-1 make cross-linked rubber have white or milky color.
A kind of preparation method of light microvoid structure EPDM rubber sponge, its said method comprise and are prepared as follows step:
A. earlier with terpolymer EP rubber thin leading to 5 times in mill; Add Triple Pressed Stearic Acid, zinc oxide, whipping agent, quicklime, anti-aging agent then successively; Mixingly add carbon black, filler successively after evenly; Further mixing even back adds softening agent, mixes the back and adds promotor, adds vulcanizing agent at last; With rubber unvulcanizate packing 10 times, mix down sheet afterwards, park 24 hours for use;
B. sheet is descended in the film back mixing that will park 24 hours again, the film sampling is put into the electric heating constant temperature air dry oven at 220 ℃ of following natural foamings, and calculate gained spongy mass density;
C. back mixing gained film in the step 2 is weighed corresponding quality, put into grinding tool, be placed on the vulcanizing press again and vulcanize; Temperature is controlled at 220 ℃; Curing time records the time with no rotor vulkameter and decides, and behind the arrival curing time, takes out cross-linked rubber; With its naturally cooling, promptly get the EPDM rubber sponge.
Advantage of the present invention and effect are:
The characteristic of the present invention light color EPDM rubber sponge is that tinting material and white dyes are introduced in the rubbery system a kind of as auxiliary agent, and elastomeric material is had and white approaching light color, has enlarged the scope of application of rubber product.Simultaneously, light EPDM rubber sponge of the present invention possesses good hygroscopic property.Light EPDM rubber sponge of the present invention is applicable to the compression molding mode.EPDM rubber sponge expansion ratio of the present invention is big, and indexs such as tensile strength, elongation at break, stress at definite elongation and compression set can satisfy the requirement of sealed strip use properties, and gained rubber sponge abscess is even simultaneously, has hygroscopic property.
Description of drawings
Fig. 1 is one of sem analysis picture of rubber sponge of the present invention;
Fig. 2 be rubber sponge of the present invention the sem analysis picture two.
Annotate: Fig. 1-Fig. 2 of the present invention is the analysis schematic picture of product state, figure Chinese words or the unintelligible understanding that does not influence technical scheme of the present invention of image.
Embodiment
With reference to the accompanying drawings the present invention is elaborated.
The present invention provides the EPDM that a kind of abscess is even, expansion ratio is big, compression set is low rubber sponge, is suitable for processing the constituent and the preparation process of the light vesicular structure EPDM rubber sponge of sealed strip product.
The present invention light color EPDM rubber sponge is that tinting material and white dyes are introduced in the rubbery system a kind of as auxiliary agent, makes elastomeric material have white or milky color, has enlarged the scope of application of rubber product.
Light color EPDM rubber sponge comprises that also packing strengthening agent selects for use molecular sieve powder instead of part or whole talcum powder and/or Calcium of intensifiens as weighting agent, makes latex foam products have hygroscopic property.Light color EPDM rubber sponge characteristic is to utilize whipping agent decomposes and the promotor promoter action in terpolymer EP rubber to match, the uniform EPDM rubber sponge of a kind of abscess material of processing.Use superoxide two 25 as vulcanizing agent in the light color EPDM rubber sponge, in cross-linked rubber, form carbon-carbon bond, process the low rubber sponge material of compression set.
Terpolymer EP rubber is U.S. Royalene 525 types and Royalene 509 type terpolymer EP rubbers.Tinting material is a kind of in Rutile type Titanium Dioxide, ultramarine and the white dyes, also can be two or more combination of these three kinds of tinting materials, and white titanium pigment is the R902+ Rutile type Titanium Dioxide of the U.S., and white dyes is white dyes OB-1.
Vulcanization accelerator is the use separately of tetramethyl-thiuram disulfide (TMTD), 2-thiol benzothiazole (M), zinc diethyldithiocarbamate (EZ), ziram (BZ or ZDBC), zinc dibutyl dithiocarbamate (PZ), bis-pentamethylenethiuram tetrasulfide (DPTT or TRA), perhaps two kinds of these several kinds of promotor or this two or more combination.Vulcanization accelerator is TMTD, DPTT etc.
Packing strengthening agent is that WHITE CARBON BLACK or talcum powder or Calcium of intensifiens or molecular sieve powder are used separately, also can be two kinds or two or more combinations of above four kinds of packing strengthening agents.Packing strengthening agent bag precipitated silica, superfine talcum powder, Calcium of intensifiens, 3A molecular sieve etc.Softening agent is Yellow Protopet 2A and cycloalkanes wet goods.
Whipping agent is that blowing agent AC or whipping agent OBSH use separately, or the combination of these two kinds of whipping agents.Whipping agent is Japanese blowing agent AC, German whipping agent OBSH etc.Frothing aid of the present invention adopts analytical pure urea.
Other auxiliary agents comprise vulcanization leveller, coupling agent, anti-aging agent, polar additive and moisture adsorbent etc.Vulcanization leveller is Triple Pressed Stearic Acid and zinc oxide.Coupling agent is that Si69, KH570, KH590, KH550 use separately, also can be two or more combination in the above several kinds of coupling agents.Coupling agent is coupling agent Si69, KH570, KH590 and KH550 etc.Anti-aging agent is that solid paraffin, 2246,246, UV531, UV326, UV327, UV328 etc. form separately, also can be two kinds in above several kinds of anti-aging agent or two or more combinations.Anti-aging agent is solid paraffin and antioxidant 2246,246 and 4010NA etc., and polar additive is PEG2000, and moisture adsorbent is a quicklime.
The performance test of the described light EPDM rubber sponge of present embodiment is divided into projects such as tensile property test, hardness test, density measurement, compression set test and expansion ratio calculating.The tensile property test is undertaken by GB/T 528-1992.Hardness test is undertaken by GB/T 531-1992.Density measurement is undertaken by GB/T 533-2008.The compression set test is undertaken by GB/T 6669-2008.The expansion ratio calculation formula is shown in following formula:
The microtexture of light EPDM rubber sponge of the present invention is characterized by scanning electron microscope analysis (SEM).
Embodiment 1:
The described EPDM rubber sponge of present embodiment is made up of terpolymer EP rubber matrix, whipping agent, tinting material, packing strengthening agent, softening agent and relevant vulcanizing agent and vulcanization aid.The characteristic of present embodiment is that tinting material Rutile type Titanium Dioxide, ultramarine and white dyes etc. are introduced in the rubber cooperation system a kind of as auxiliary agent, makes elastomeric material have white or near the color of white, has enlarged the scope of application of rubber product.The characteristic of present embodiment also comprises utilizes whipping agent decomposes and the promotor promoter action in terpolymer EP rubber to match, and a kind of abscess of processing is uniform, the light EPDM rubber sponge material that compression set is low.
The constituent of present embodiment comprises 100 mass parts terpolymer EP rubbers; 6 parts of whipping agent OBSH; 3 parts of Triple Pressed Stearic Acid; 5 parts of zinc oxide; 2 parts of solid paraffins; 5 parts of PEG2000; 5 parts of quicklime; 1 part two 25; 1.5 part antioxidant 2246; 1 part of UV light absorber UV531; 1 part of TMTD; 0.8 part M; 1.2 part PZ; 1.2 part BZ; 1.5 part DPTT; 15 parts of precipitated silicas; 100 parts of superfine talcum powders; 20 parts of Rutile type Titanium Dioxides; 0.2 part ultramarine; 2.5 part Si-69; 1 part of KH550 and 60 parts of Yellow Protopet 2As.
The concrete preparation process of the present invention is following:
1. earlier with terpolymer EP rubber thin leading to 5 times in mill; Add Triple Pressed Stearic Acid, zinc oxide, whipping agent, quicklime, anti-aging agent then successively; Mixingly add carbon black, filler successively after evenly; Further mixing even back adds softening agent, mixes the back and adds promotor, adds vulcanizing agent at last.With rubber unvulcanizate packing 10 times, mix down sheet afterwards, park 24 hours for use.
2. sheet is descended in the film back mixing that will park 24 hours again, the film sampling is put into the electric heating constant temperature air dry oven at 220 ℃ of following natural foamings, and calculate gained spongy mass density.
3. step 2 gained density of foam rubber; Back mixing gained film in the step 2 is weighed corresponding quality, put into the grinding tool of given volume, be placed on the vulcanizing press again and vulcanize; Temperature is controlled at 220 ℃, and curing time records the time with no rotor vulkameter and decides.After arriving curing time, take out cross-linked rubber,, promptly get EPDM rubber sponge of the present invention its naturally cooling.
The performance test of the described light EPDM rubber sponge of present embodiment is divided into projects such as tensile property test, hardness test, density measurement, compression set test and expansion ratio calculating.The tensile property test is undertaken by GB/T 528-1992.Hardness test is undertaken by GB/T 531-1992.Density measurement is undertaken by GB/T 533-2008.The compression set test is undertaken by GB/T 6669-2008.Shown in the following formula of expansion ratio calculation formula:
The The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 1.
Embodiment 2:
The constituent of present embodiment is consistent with the constituent of embodiment 1.The difference of the constituent of present embodiment and embodiment 1 is to use 1 part of PZ, 1.5 parts of BZ, 2 parts of Si-69,1.5 parts of KH550,30 parts of Yellow Protopet 2As, 30 parts of NOs; Use 110 parts of Calcium of intensifiens to substitute superfine talcum powder, use 1 part of anti-aging agent 246 to substitute antioxidant 2246 as weighting agent.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 1.
Embodiment 3:
The constituent of present embodiment is consistent with the constituent of embodiment 1.The difference of the constituent of present embodiment and embodiment 1 is to use 1 part of PZ, 1.5 parts of BZ, 1.5 parts of DPTT, 1.5 parts of EZ, 1 part of Si-69,1 part of KH550,0.2 portion of ultramarine, uses 110 parts of 3A molecular sieve powder to substitute superfine talcum powder.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard.The The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 1.
Embodiment 4:
The constituent of present embodiment is consistent with the constituent of embodiment 1.The difference of the constituent of present embodiment and embodiment 1 is to use 1 part of PZ, 1.5 parts of BZ, 1.5 parts of DPTT, 1 part of EZ, 2 parts of Si-69,1 part of KH550,0.3 portion of ultramarine.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 1.
Embodiment 5:
The constituent of present embodiment is consistent with the constituent of embodiment 1.The difference of the constituent of present embodiment and embodiment 1 is to use 1 part of blowing agent AC, 0.2 part of urea and 6 parts of whipping agent OBSH as composite foamed system; Use 2 parts of Si-69,1 part of KH570,0.3 portion of ultramarine, 30 parts of Rutile type Titanium Dioxides, use 115 parts of 3A molecular sieve powder to substitute superfine talcum powder.Use 1 part of UV light absorber UV327 to substitute UV531, use 1 part of anti-aging agent 246 to substitute 1.5 parts of antioxidant 2246s.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 2.
Embodiment 6:
The constituent of present embodiment is consistent with the constituent of embodiment 1.The difference of the constituent of present embodiment and embodiment 1 is to use 1.5 parts of BZ; Use 1 part of blowing agent AC, 0.2 part of urea and 5 parts of whipping agent OBSH as composite foamed system; Use 2 parts of Si-69,1.5 parts of KH570,0.2 portion of ultramarine, 0.1 part of white dyes OB-1,30 parts of Rutile type Titanium Dioxides, use 120 parts of 3A molecular sieve powder to substitute superfine talcum powder.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 2.
Embodiment 7:
The constituent of present embodiment is consistent with the constituent of embodiment 1.The difference of the constituent of present embodiment and embodiment 1 is to use 1.5 parts of BZ, 1.5 parts of DPTT; Use 1 part of blowing agent AC, 0.2 part of urea and 5 parts of whipping agent OBSH as composite foamed system; Use 2 parts of KH590,1.5 parts of KH570,0.2 portion of ultramarine, 0.2 part of white dyes OB-1,30 parts of Rutile type Titanium Dioxides, use 120 parts of 3A molecular sieve powder to substitute superfine talcum powder.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 2.
Embodiment 8:
The constituent of present embodiment is consistent with the constituent of embodiment 1.The difference of the constituent of present embodiment and embodiment 1 is to use 1.5 parts of BZ, 1.5 parts of DPTT, 1.5 parts of EZ; Use 1 part of blowing agent AC, 0.2 part of urea and 5 parts of whipping agent OBSH as composite foamed system; Use 2 parts of KH590,1 part of Si-69,0.2 portion of ultramarine, 0.1 part of white dyes OB-1,30 parts of Rutile type Titanium Dioxides, use 115 parts of 3A molecular sieve powder to substitute superfine talcum powder.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 2.
Embodiment 9:
The constituent of present embodiment comprises 100 parts of terpolymer EP rubbers, 6 parts of whipping agent OBSH, 5 parts of zinc oxide, 3 parts of Triple Pressed Stearic Acid, 2 parts of solid paraffins, 5 parts of PEG2000,5 parts of quicklime, 0.8 part of sulphur, 1 part of TMTD, 0.8 part of M, 1.2 parts of PZ, 1.2 parts of BZ, 1.5 parts of DPTT, 15 parts of WHITE CARBON BLACKs, 100 parts of 3A molecular sieve powder, 25 parts of Rutile type Titanium Dioxides, 0.3 part of white dyes, 0.1 ultramarine, 1 part of KH590,2 parts of KH570,1.5 parts of antioxidant 2246s, 60 parts of Yellow Protopet 2As.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 2.
Embodiment 10:
The constituent of present embodiment comprises 100 parts of terpolymer EP rubbers; 6 parts of whipping agent OBSH; 5 parts of zinc oxide; 3 parts of Triple Pressed Stearic Acid; 2 parts of solid paraffins; 5 parts of PEG2000; 5 parts of quicklime; 0.8 part sulphur; 1 part of TMTD; 0.8 part M; 1.2 part PZ; 1.2 part BZ; 1.5 part DPTT; 15 parts of WHITE CARBON BLACKs; 100 parts of 3A molecular sieve powder; 25 parts of Rutile type Titanium Dioxides; 0.3 part white dyes; 0.1 ultramarine; 1 part of KH590; 2 parts of KH570; 1.5 part antioxidant 2246; 1 part of UV light absorber UV328; 60 parts of Yellow Protopet 2As.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 3.
Embodiment 11:
The constituent of present embodiment is consistent with embodiment 10.The difference of the constituent of present embodiment and embodiment 10 is to use 1 part of sulphur, 1.2 parts of PZ, 1.5 parts of BZ, 30 parts of Rutile type Titanium Dioxides, 2 parts of KH590,1.5 parts of KH570,65 parts of Yellow Protopet 2As, uses 100 parts of Calcium of intensifiens to substitute molecular sieve powder as infill system.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 3.
Embodiment 12:
The constituent of present embodiment is consistent with embodiment 10.The difference of the constituent of present embodiment and embodiment 10 is to use 1 part of PZ, 1.5 parts of BZ, 1.5 parts of DPTT, 30 parts of Rutile type Titanium Dioxides, 2 parts of KH570,60 parts of NOs.Use 100 parts of superfine talcum powders to substitute molecular sieve powder as infill system.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 3.
Embodiment 13:
The constituent of present embodiment is consistent with embodiment 10.The difference of the constituent of present embodiment and embodiment 10 is to use 1 part of PZ, 1.5 parts of BZ, 1.5 parts of EZ, 30 parts of Rutile type Titanium Dioxides, 2 parts of KH570.Use 100 parts of superfine talcum powders to substitute molecular sieve powder as infill system.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 3.
Embodiment 14:
The constituent of present embodiment is consistent with embodiment 10.The difference of the constituent of present embodiment and embodiment 10 is to use 1 part of PZ, 1.5 parts of BZ, 1 part of EZ, 30 parts of Rutile type Titanium Dioxides, 2 parts of KH570.Use 100 parts of superfine talcum powders to substitute molecular sieve powder as infill system.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 3.
Embodiment 15:
The constituent of present embodiment is consistent with embodiment 10.The difference of the constituent of present embodiment and embodiment 10 is to use 1 part of blowing agent AC, 6 parts of whipping agent OBSH and 0.1 part of urea as foaming system, uses 1 part of UV326 to substitute UV531.Use 30 parts of Rutile type Titanium Dioxides, 0.1 part of white dyes OB-1.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 4.
Embodiment 16:
The constituent of present embodiment is consistent with embodiment 10.The difference of the constituent of present embodiment and embodiment 10 is to use 1 part of blowing agent AC, 5 parts of whipping agent OBSH and 0.1 part of urea as foaming system, uses 1 part of UV326 to substitute UV531.Use 1.5 parts of BZ, 30 parts of Rutile type Titanium Dioxides, 0.15 part of white dyes OB-1.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 4.The sem analysis picture of present embodiment gained rubber sponge is as depicted in figs. 1 and 2.
Embodiment 17:
The constituent of present embodiment is consistent with embodiment 10.The difference of the constituent of present embodiment and embodiment 10 is to use 1 part of blowing agent AC, 5 parts of whipping agent OBSH and 0.1 part of urea as foaming system, uses 1 part of UV326 to substitute UV531.Use 1 part of PZ, 1.5 parts of BZ, 1.5 parts of DPTT, 30 parts of Rutile type Titanium Dioxides, 0.2 part of white dyes OB-1.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 4.
Embodiment 18:
The constituent of present embodiment is consistent with embodiment 10.The difference of the constituent of present embodiment and embodiment 10 is to use 1 part of blowing agent AC, 5 parts of whipping agent OBSH and 0.1 part of urea as foaming system, uses 1 part of UV326 to substitute UV531.Use 1 part of PZ, 1.5 parts of BZ, 1.5 parts of DPTT, 1.5 parts of EZ, 30 parts of Rutile type Titanium Dioxides, 0.25 part of white dyes OB-1.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 4.
Embodiment 19:
The constituent of present embodiment is consistent with embodiment 10.The difference of the constituent of present embodiment and embodiment 10 is to use 1 part of blowing agent AC, 5 parts of whipping agent OBSH and 0.1 part of urea as foaming system, uses 1 part of UV326 to substitute UV531.Use 1 part of PZ, 1.5 parts of BZ, 1.5 parts of DPTT, 1 part of EZ, 30 parts of Rutile type Titanium Dioxides, 0.3 part of white dyes OB-1.
The preparation method of present embodiment is identical with embodiment 1 with the performance test standard, and the The performance test results of present embodiment gained light color EPDM rubber sponge is seen shown in the table 4.
Table 1
| Test event | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Tensile strength/MPa | 1.21 | 1.37 | 1.25 | 1.12 |
| Elongation at break/% | 269.13 | 303.72 | 390.75 | 301.95 |
| 100% stress at definite elongation/MPa | 0.82 | 0.68 | 0.46 | 0.52 |
| Shao Er hardness | 24 | 24 | 22 | 24 |
| Compression set/% | 8.37 | 9.43 | 8.32 | 8.97 |
| Expansion ratio | 2.37 | 2.58 | 2.61 | 2.64 |
Table 2
| Test event | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 | Embodiment 9 |
| Tensile strength/MPa | 1.12 | 1.08 | 1.27 | 1.3 | 1.05 |
| Elongation at break/% | 307.12 | 423.56 | 443.03 | 389.46 | 341.23 |
| 100% stress at definite elongation/MPa | 0.87 | 0.41 | 0.46 | 0.55 | 0.57 |
| Shao Er hardness | 22 | 21 | 18 | 22 | 19 |
| Compression set/% | 8.46 | 8.15 | 6.42 | 8.93 | 9.24 |
| Expansion ratio | 2.69 | 2.84 | 2.36 | 2.51 | 2.32 |
Table 3
| Test event | Embodiment 10 | Embodiment 11 | Embodiment 12 | Embodiment 13 | Embodiment 14 |
| Tensile strength/MPa | 1.17 | 1.19 | 1.21 | 1.25 | 1.01 |
| Elongation at break/% | 250.79 | 344.26 | 253.69 | 498.37 | 302.43 |
| 100% stress at definite elongation/MPa | 0.54 | 0.45 | 0.64 | 0.47 | 0.48 |
| Shao Er hardness | 23 | 25 | 22 | 20 | 24 |
| Compression set/% | 7.89 | 10.50 | 7.99 | 8.15 | 14.70 |
| Expansion ratio | 2.57 | 2.77 | 2.52 | 2.48 | 2.45 |
Table 4
| Test event | Embodiment 15 | Embodiment 16 | Embodiment 17 | Embodiment 18 | Embodiment 19 |
| Tensile strength/MPa | 1.46 | 1.39 | 1.06 | 1.16 | 1.13 |
| Elongation at break/% | 266.72 | 355.36 | 195.29 | 213.47 | 208.97 |
| 100% stress at definite elongation/MPa | 0.7 | 0.66 | 0.84 | 0.65 | 0.87 |
| Shao Er hardness | 30 | 34 | 26 | 28 | 25 |
| Compression set/% | 8.69 | 8.32 | 8.42 | 9.1 | 9.57 |
| Expansion ratio | 2.37 | 2.58 | 2.61 | 2.48 | 2.64 |
Claims (3)
1. a light microvoid structure EPDM rubber sponge is made up of terpolymer EP rubber, whipping agent, tinting material, white dyes, packing strengthening agent, vulcanizing agent and vulcanization accelerator, auxiliary agent, it is characterized in that; The light EPDM rubber sponge of this kind comprises: the terpolymer EP rubber of 100 mass parts, 5.5-8.5 part vulcanizing agent and promotor, the filler of 110-115 part; 115 parts of molecular sieve powder, 15-20 part precipitated silica, 60-65 part softening agent and 6-7 part whipping agent; Anti-aging agent 2-4.5 part, tinting material Rutile type Titanium Dioxide 20-50 part, ultramarine 0.1-0.5 part; White dyes 2,2'-(4, the 4'-diphenylethyllene-) two benzoxazoles (white dyes OB-1) 0.1-0.3 part; Rubber processing aids is like vulcanization leveller, polar additive, moisture adsorbent and coupling agent.
2. a kind of light microvoid structure EPDM rubber sponge according to claim 1 is characterized in that, described tinting material Rutile type Titanium Dioxide and ultramarine and white dyes OB-1 make cross-linked rubber have white or milky color.
3. the preparation method of a light microvoid structure EPDM rubber sponge is characterized in that, said method comprises and is prepared as follows step:
A. earlier with terpolymer EP rubber thin leading to 5 times in mill; Add Triple Pressed Stearic Acid, zinc oxide, whipping agent, quicklime, anti-aging agent then successively; Mixingly add carbon black, filler successively after evenly; Further mixing even back adds softening agent, mixes the back and adds promotor, adds vulcanizing agent at last; With rubber unvulcanizate packing 10 times, mix down sheet afterwards, park 24 hours for use;
B. sheet is descended in the film back mixing that will park 24 hours again, the film sampling is put into the electric heating constant temperature air dry oven at 220 ℃ of following natural foamings, and calculate gained spongy mass density;
C. back mixing gained film in the step 2 is weighed corresponding quality, put into grinding tool, be placed on the vulcanizing press again and vulcanize; Temperature is controlled at 220 ℃; Curing time records the time with no rotor vulkameter and decides, and behind the arrival curing time, takes out cross-linked rubber; With its naturally cooling, promptly get the EPDM rubber sponge.
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