CN112625312A - Production process of degradable sealant - Google Patents
Production process of degradable sealant Download PDFInfo
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- CN112625312A CN112625312A CN202011506645.4A CN202011506645A CN112625312A CN 112625312 A CN112625312 A CN 112625312A CN 202011506645 A CN202011506645 A CN 202011506645A CN 112625312 A CN112625312 A CN 112625312A
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- rubber
- degradable
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- 239000000565 sealant Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 79
- 239000000835 fiber Substances 0.000 claims abstract description 71
- 239000004677 Nylon Substances 0.000 claims abstract description 52
- 229920001778 nylon Polymers 0.000 claims abstract description 52
- 229920001971 elastomer Polymers 0.000 claims abstract description 48
- 238000002156 mixing Methods 0.000 claims abstract description 48
- 239000005060 rubber Substances 0.000 claims abstract description 48
- 230000015556 catabolic process Effects 0.000 claims abstract description 30
- 238000006731 degradation reaction Methods 0.000 claims abstract description 30
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical class O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 29
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011941 photocatalyst Substances 0.000 claims abstract description 25
- 240000008042 Zea mays Species 0.000 claims abstract description 19
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims abstract description 19
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 19
- 235000005822 corn Nutrition 0.000 claims abstract description 19
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 18
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 18
- 239000011259 mixed solution Substances 0.000 claims abstract description 18
- 239000004014 plasticizer Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004202 carbamide Substances 0.000 claims abstract description 14
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004709 Chlorinated polyethylene Substances 0.000 claims abstract description 13
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims abstract description 13
- 239000008116 calcium stearate Substances 0.000 claims abstract description 13
- 235000013539 calcium stearate Nutrition 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 13
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims abstract description 13
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 76
- 238000001035 drying Methods 0.000 claims description 34
- 238000003756 stirring Methods 0.000 claims description 34
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 28
- 238000002360 preparation method Methods 0.000 claims description 25
- 239000004743 Polypropylene Substances 0.000 claims description 23
- -1 polypropylene Polymers 0.000 claims description 23
- 229920001155 polypropylene Polymers 0.000 claims description 23
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 23
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 18
- 229910017604 nitric acid Inorganic materials 0.000 claims description 18
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical group [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000002244 precipitate Substances 0.000 claims description 17
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 16
- 239000002174 Styrene-butadiene Substances 0.000 claims description 15
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 15
- 229920000126 latex Polymers 0.000 claims description 15
- 239000004816 latex Substances 0.000 claims description 15
- 239000011115 styrene butadiene Substances 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 15
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 244000043261 Hevea brasiliensis Species 0.000 claims description 11
- 235000021355 Stearic acid Nutrition 0.000 claims description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 11
- 230000003712 anti-aging effect Effects 0.000 claims description 11
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000006232 furnace black Substances 0.000 claims description 11
- 239000008187 granular material Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 claims description 11
- 229920003052 natural elastomer Polymers 0.000 claims description 11
- 229920001194 natural rubber Polymers 0.000 claims description 11
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 11
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 11
- 239000012188 paraffin wax Substances 0.000 claims description 11
- 239000008117 stearic acid Substances 0.000 claims description 11
- 239000011593 sulfur Substances 0.000 claims description 11
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 11
- 239000011787 zinc oxide Substances 0.000 claims description 11
- KUMQGAQSWQTOTM-UHFFFAOYSA-N benzoyl benzenecarboperoxoate;toluene Chemical compound CC1=CC=CC=C1.C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 KUMQGAQSWQTOTM-UHFFFAOYSA-N 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 10
- 238000004381 surface treatment Methods 0.000 claims description 10
- ZRMMVODKVLXCBB-UHFFFAOYSA-N 1-n-cyclohexyl-4-n-phenylbenzene-1,4-diamine Chemical compound C1CCCCC1NC(C=C1)=CC=C1NC1=CC=CC=C1 ZRMMVODKVLXCBB-UHFFFAOYSA-N 0.000 claims description 9
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 6
- 239000007822 coupling agent Substances 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 6
- 235000019198 oils Nutrition 0.000 claims description 6
- 239000008096 xylene Substances 0.000 claims description 6
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 5
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 235000012424 soybean oil Nutrition 0.000 claims description 5
- 239000003549 soybean oil Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 3
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 2
- 239000012295 chemical reaction liquid Substances 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 14
- 239000004408 titanium dioxide Substances 0.000 abstract description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006065 biodegradation reaction Methods 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 244000005700 microbiome Species 0.000 abstract description 2
- 230000001699 photocatalysis Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229920000877 Melamine resin Polymers 0.000 description 3
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 238000001782 photodegradation Methods 0.000 description 1
- 208000017983 photosensitivity disease Diseases 0.000 description 1
- 231100000434 photosensitization Toxicity 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000004589 rubber sealant Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a degradable sealant production process, which comprises the steps of plasticating modified rubber and chlorinated polyethylene to obtain a plasticated material, uniformly mixing the plasticated material, calcium stearate, an antioxidant, a plasticizer, a photocatalyst and a degradation material, cooling, cutting into particles to obtain a mixed material, adding the mixed material into a mixed solution of butyl acetate and methylcyclohexane, and uniformly dispersing to obtain the degradable sealant; in the production process, the titanium dioxide is modified by adding the urea, so that the photocatalytic effect of the photocatalyst is improved; the degradation material is prepared by taking the corn fiber as the main raw material, can be decomposed into water, carbon dioxide and inorganic micromolecules by microorganisms in the nature, has high biodegradation efficiency and cannot cause environmental pollution; the degradation rate of the degradable sealant is high by using the photocatalyst and the degradation material; by adding the modified montmorillonite and the modified nylon short fiber into the rubber, the sealant added with the modified rubber has excellent mechanical properties.
Description
Technical Field
The invention relates to the field of sealants, in particular to a production process of a degradable sealant.
Background
The sealant is a material for filling gaps, the liquid sealant is one of the main materials, and the chloroprene rubber, the chlorosulfonated polyethylene and the nitrile rubber have the characteristics of high drying speed, low price, convenience in use and the like, and are widely applied to the preparation of the liquid sealant.
But the mechanical property of the existing rubber material is not good enough, so that the prepared sealant can not well meet the sealing effect, and along with the continuous improvement of social environment consciousness, the treatment of solid waste needs to be low-carbon, environment-friendly and harmless, however, the rubber sealant is difficult to recycle after being used for the first time, the removed waste rubber can not be effectively recycled and is discarded in the environment, and because the waste rubber is difficult to naturally degrade, if the waste rubber is treated in a landfill mode, the environment pollution is easy to cause, even if the waste rubber is treated in a traditional incineration mode, the burnt product can also cause bad influence on the environment.
Therefore, the key point of the invention is to provide the sealant which has good performance, can be naturally degraded and has high degradation efficiency.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide a production process of degradable sealant, which comprises the following steps: the degradable sealant is prepared by preparing modified rubber, photocatalyst and degradable material, plasticating the modified rubber and chlorinated polyethylene to obtain plasticated material, uniformly mixing the plasticated material, calcium stearate, an antioxidant, a plasticizer, the photocatalyst and the degradable material, cooling and cutting into particles to obtain mixed material, adding the mixed material into a mixed solution of butyl acetate and methylcyclohexane for uniform dispersion to obtain the degradable sealant, and the problems that the existing sealant cannot well meet the sealing effect and is difficult to naturally degrade are solved.
The purpose of the invention can be realized by the following technical scheme:
a production process of degradable sealant comprises the following steps:
the method comprises the following steps: weighing 40-60 parts of modified rubber, 4-8 parts of chlorinated polyethylene, 0.2-0.4 part of calcium stearate, 0.02-0.04 part of antioxidant, 2-5 parts of plasticizer, 0.1-0.5 part of photocatalyst, 3-5 parts of degradation material, 15-25 parts of butyl acetate and 12-20 parts of methylcyclohexane according to parts by weight for later use;
step two: plasticating the modified rubber and the chlorinated polyethylene to obtain a plasticated material, then uniformly mixing the plasticated material, the calcium stearate, the antioxidant, the plasticizer, the photocatalyst and the degradation material, cooling and cutting into particles to obtain a mixed material;
step three: and adding the mixed material into a mixed solution of butyl acetate and methylcyclohexane, and uniformly dispersing at the rotation speed of 500-800r/min to obtain the degradable sealant.
As a further scheme of the invention: the antioxidant is one of antioxidant 168, antioxidant 1010 and antioxidant 1076; the plasticizer is epoxidized soybean oil.
As a further scheme of the invention: the photocatalyst is modified titanium dioxide, and the preparation method of the modified titanium dioxide comprises the following steps:
s31: adding 15mL of butyl titanate into 20mL of absolute ethanol, and stirring and dispersing to form a transparent butyl titanate-ethanol solution;
s32: adding urea into nitric acid solution with the concentration of 1mol/L of 30mL of substance, and stirring and dispersing to form urea-nitric acid solution;
s33: dropwise adding a butyl titanate-ethanol solution into a urea-nitric acid solution, uniformly stirring, adjusting the pH to 7 by using a sodium hydroxide solution with the mass concentration of 1mol/L, heating in an oil bath, stirring and reacting for 2-3h under the conditions that the temperature is 70-90 ℃ and the rotating speed is 100-200r/min, washing the reaction liquid by using deionized water, and centrifuging to obtain a precipitate;
s34: drying the precipitate, heating to 400 ℃ at the heating rate of 5 ℃/min, and then roasting at constant temperature for 4h to obtain the modified titanium dioxide.
As a further scheme of the invention: the weight ratio of the butyl titanate to the urea is 1: 1-3.
As a further scheme of the invention: the preparation method of the degradation material comprises the following steps:
s51: weighing 90-110 parts of corn fiber and 40-60 parts of polypropylene according to parts by weight for later use;
s52: heating and melting polypropylene, adding corn fiber into the melted polypropylene, uniformly mixing, adding the mixture of the polypropylene and the corn fiber into a double-screw granulator for granulation, dehydrating, spin-drying and air-cooling the prepared granules, and drying the granules for 1-2 hours at the temperature of 110-140 ℃ to obtain the degradation material.
As a further scheme of the invention: the preparation method of the modified rubber comprises the following steps:
s61: weighing 60-80 parts of natural rubber, 20-40 parts of styrene butadiene rubber, 1-3 parts of sulfur, 0.5-0.9 part of accelerator CZ, 1-5 parts of zinc oxide, 1-3 parts of stearic acid, 8-2 parts of anti-aging agent CPPD1, 0.5-1.5 parts of paraffin, 40-60 parts of super wear-resistant furnace black, 7-13 parts of dimethylbenzene, 4-6 parts of modified nylon short fiber and 20-40 parts of modified montmorillonite according to parts by weight;
s62: firstly, plasticating natural rubber for 5-10min, then adding styrene butadiene rubber for mixing for 10-20min, then adding an accelerator CZ, zinc oxide, stearic acid and an anti-aging agent CPPD for mixing for 30-40min, and finally adding paraffin, super wear-resistant furnace black and xylene for uniformly mixing to obtain a mixed rubber material;
s63: adding the modified nylon short fiber and the modified montmorillonite into the mixed rubber material, mixing for 1-2h, then adding sulfur, and mixing uniformly to obtain the modified rubber.
As a further scheme of the invention: the preparation method of the modified nylon short fiber comprises the following steps:
s71: dissolving a coupling agent in absolute ethyl alcohol to prepare a coupling agent-ethyl alcohol solution with the mass fraction of 2%, uniformly spraying the coupling agent-ethyl alcohol solution on the nylon short fibers, then placing the nylon short fibers in an oven to remove the absolute ethyl alcohol at the temperature of 80-90 ℃, heating to 130 ℃, and reacting at the constant temperature for 30min to obtain the nylon short fibers with surface treatment; wherein the coupling agent is one of KH-550, KH-560 and KH-570;
s72: adding benzoyl peroxide into toluene to prepare a benzoyl peroxide-toluene solution with the mass fraction of 1%, adding carboxylic styrene-butadiene latex into the benzoyl peroxide-toluene solution, and uniformly mixing to obtain a carboxylic styrene-butadiene latex solution with the mass fraction of 5%;
s73: and (3) soaking the nylon short fiber subjected to surface treatment in a carboxylic styrene-butadiene latex solution for 10-20min, then placing the nylon short fiber in a drying box, and drying the nylon short fiber for 90min at the temperature of 110 ℃ to obtain the modified nylon short fiber.
As a further scheme of the invention: the preparation method of the modified montmorillonite comprises the following steps:
s81: mixing sodium montmorillonite and hexadecyl trimethyl ammonium bromide according to the weight ratio of 10:1, adding the mixture into distilled water, and stirring and dispersing uniformly at the temperature of 80-90 ℃ to obtain a mixed solution with the mass fraction of 5%;
s82: and (2) carrying out ultrasonic treatment on the mixed solution for 40-60min, then stirring for 1-2h to obtain floccule, filtering the floccule, washing with distilled water until no precipitate is detected by using 0.1mol/L silver nitrate solution, drying the floccule, and then crushing to obtain the modified montmorillonite.
The invention has the beneficial effects that:
(1) the invention relates to a degradable sealant production process, which is characterized in that modified rubber and chlorinated polyethylene are plasticated to obtain a plasticated material, then the plasticated material, calcium stearate, an antioxidant, a plasticizer, a photocatalyst and a degradation material are uniformly mixed, cooled and cut into particles to obtain a mixed material, and the mixed material is added into a mixed solution of butyl acetate and methylcyclohexane to be uniformly dispersed to obtain the degradable sealant; the degradable sealant can be simultaneously carried out through two modes of photo-degradation and biodegradation by using the photocatalyst and the degradation material, so that the dual degradation effect is achieved, and the degradation rate of the degradable sealant is high;
(2) adding butyl titanate into absolute ethyl alcohol, stirring and dispersing to form a butyl titanate-ethanol solution, adding urea into a nitric acid solution, stirring and dispersing to form a urea-nitric acid solution, dropwise adding the butyl titanate-ethanol solution into the urea-nitric acid solution, uniformly stirring, adjusting the pH value by using a sodium hydroxide solution, heating in an oil bath, stirring for reaction, washing the reaction solution by using deionized water, centrifuging to obtain a precipitate, drying the precipitate, heating to 400 ℃, and then roasting at constant temperature to obtain modified titanium dioxide; titanium dioxide is the most widely used photocatalyst at present, and has the advantages of high activity, good stability, no toxicity and low price, however, because the band gap of the titanium dioxide is wide and can only be excited by ultraviolet rays with shorter wavelength, the solar energy utilization rate of the titanium dioxide is very low, therefore, the titanium dioxide is modified by adding urea, the urea is pyrolyzed to generate isocyanic acid in the roasting process at 400 ℃, and then the isocyanic acid is converted into cyanamide, wherein melamine exists, the melamine can play the role of a photosensitizer, and then the melamine is condensed to form the cyanuramide which is combined with the hydroxyl action on the surface of the titanium dioxide, the prepared modified titanium dioxide has good visible light responsiveness by the photosensitization action, the photocatalysis effect of the photocatalyst is improved, and the degradation rate of the degradable sealant is improved;
(3) the invention relates to a production process of a degradable sealant, which comprises the steps of heating and melting polypropylene, adding corn fiber into the melted polypropylene, uniformly mixing, adding a mixture of the polypropylene and the corn fiber into a double-screw granulator for granulation, dehydrating, spin-drying and air-cooling the manufactured granules, and drying to obtain a degraded material; the degradable material takes corn fiber as a main raw material, can be decomposed into water, carbon dioxide and inorganic micromolecules by microorganisms in the nature, has high biodegradation efficiency and cannot cause environmental pollution;
(4) the invention relates to a degradable sealant production process, which is characterized in that natural rubber is plasticated, added with styrene butadiene rubber and mixed, then added with an accelerator CZ, zinc oxide, stearic acid and an anti-aging agent CPPD and mixed, finally added with paraffin, super wear-resistant furnace black and xylene and mixed uniformly to obtain a mixed rubber material, modified nylon short fiber and modified montmorillonite are added into the mixed rubber material and mixed for 1-2 hours, and then added with sulfur and mixed uniformly to obtain modified rubber; the modified montmorillonite is formed by modifying montmorillonite with cetyl trimethyl ammonium bromide and then changing hydrophilic and oleophobic properties into oleophilic and hydrophobic properties, so that the compatibility with rubber is enhanced, and the mechanical property of the rubber is effectively improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the embodiment is a production process of degradable sealant, which comprises the following steps:
the method comprises the following steps: weighing 40 parts of modified rubber, 4 parts of chlorinated polyethylene, 0.2 part of calcium stearate, 0.02 part of antioxidant, 2 parts of plasticizer, 0.1 part of photocatalyst, 3 parts of degradation material, 15 parts of butyl acetate and 12 parts of methylcyclohexane according to parts by weight for later use;
step two: plasticating the modified rubber and the chlorinated polyethylene to obtain a plasticated material, then uniformly mixing the plasticated material, the calcium stearate, the antioxidant, the plasticizer, the photocatalyst and the degradation material, cooling and cutting into particles to obtain a mixed material;
step three: and adding the mixed material into a mixed solution of butyl acetate and methylcyclohexane, and uniformly dispersing at the rotation speed of 500-800r/min to obtain the degradable sealant.
The antioxidant is antioxidant 168; the plasticizer is epoxidized soybean oil.
The photocatalyst is modified titanium dioxide, and the preparation method of the modified titanium dioxide comprises the following steps:
s31: adding 15mL of butyl titanate into 20mL of absolute ethanol, and stirring and dispersing to form a transparent butyl titanate-ethanol solution;
s32: adding urea into nitric acid solution with the concentration of 1mol/L of 30mL of substance, and stirring and dispersing to form urea-nitric acid solution;
s33: dropwise adding a butyl titanate-ethanol solution into a urea-nitric acid solution, uniformly stirring, adjusting the pH to 7 by using a sodium hydroxide solution with the mass concentration of 1mol/L, heating in an oil bath, stirring and reacting for 2 hours at the temperature of 70 ℃ and the rotating speed of 100r/min, washing the reaction solution by using deionized water, and centrifuging to obtain a precipitate;
s34: drying the precipitate, heating to 400 ℃ at the heating rate of 5 ℃/min, and then roasting at constant temperature for 4h to obtain the modified titanium dioxide.
The weight ratio of the butyl titanate to the urea is 1: 1.
The preparation method of the degradation material comprises the following steps:
s51: weighing 90 parts of corn fiber and 40 parts of polypropylene according to parts by weight for later use;
s52: heating and melting polypropylene, adding corn fiber into the melted polypropylene, uniformly mixing, adding the mixture of the polypropylene and the corn fiber into a double-screw granulator for granulation, dehydrating, spin-drying and air-cooling the prepared granules, and drying the granules for 1h at the temperature of 110 ℃ to obtain the degradation material.
The preparation method of the modified rubber comprises the following steps:
s61: weighing 60 parts of natural rubber, 20 parts of butadiene styrene rubber, 1 part of sulfur, 0.5 part of accelerator CZ, 1 part of zinc oxide, 1 part of stearic acid, 1 parts of anti-aging agent CPPD, 0.5 part of paraffin, 40 parts of super wear-resistant furnace black, 7 parts of dimethylbenzene, 4 parts of modified nylon short fibers and 20 parts of modified montmorillonite according to parts by weight;
s62: firstly plasticating natural rubber for 5min, then adding styrene butadiene rubber for mixing for 10min, then adding an accelerator CZ, zinc oxide, stearic acid and an anti-aging agent CPPD for mixing for 30min, and finally adding paraffin, super wear-resistant furnace black and xylene for uniformly mixing to obtain a mixed rubber material;
s63: adding the modified nylon short fiber and the modified montmorillonite into the mixed rubber material, mixing for 1h, then adding sulfur, and mixing uniformly to obtain the modified rubber.
The preparation method of the modified nylon short fiber comprises the following steps:
s71: dissolving a coupling agent in absolute ethyl alcohol to prepare a coupling agent-ethyl alcohol solution with the mass fraction of 2%, uniformly spraying the coupling agent-ethyl alcohol solution on the nylon short fibers, then placing the nylon short fibers in an oven, removing the absolute ethyl alcohol at the temperature of 80 ℃, heating to 130 ℃, and reacting at the constant temperature for 30min to obtain the nylon short fibers with surface treatment;
s72: adding benzoyl peroxide into toluene to prepare a benzoyl peroxide-toluene solution with the mass fraction of 1%, adding carboxylic styrene-butadiene latex into the benzoyl peroxide-toluene solution, and uniformly mixing to obtain a carboxylic styrene-butadiene latex solution with the mass fraction of 5%;
s73: and (3) soaking the nylon short fiber subjected to surface treatment in a carboxylic styrene-butadiene latex solution for 10min, then placing the nylon short fiber in a drying box, and drying the nylon short fiber for 90min at the temperature of 110 ℃ to obtain the modified nylon short fiber.
The preparation method of the modified montmorillonite comprises the following steps:
s81: mixing sodium montmorillonite and hexadecyl trimethyl ammonium bromide according to the weight ratio of 10:1, adding the mixture into distilled water, and stirring and dispersing uniformly at the temperature of 80 ℃ to obtain a mixed solution with the mass fraction of 5%;
s82: and (2) carrying out ultrasonic treatment on the mixed solution for 40min, then stirring for 1h to obtain floccule, filtering the floccule, washing with distilled water until no precipitate is detected by using 0.1mol/L silver nitrate solution, drying the floccule, and then crushing to obtain the modified montmorillonite.
Example 2:
the embodiment is a production process of degradable sealant, which comprises the following steps:
the method comprises the following steps: weighing 50 parts of modified rubber, 6 parts of chlorinated polyethylene, 0.3 part of calcium stearate, 0.03 part of antioxidant, 3 parts of plasticizer, 0.3 part of photocatalyst, 4 parts of degradation material, 20 parts of butyl acetate and 16 parts of methylcyclohexane according to parts by weight for later use;
step two: plasticating the modified rubber and the chlorinated polyethylene to obtain a plasticated material, then uniformly mixing the plasticated material, the calcium stearate, the antioxidant, the plasticizer, the photocatalyst and the degradation material, cooling and cutting into particles to obtain a mixed material;
step three: and adding the mixed materials into a mixed solution of butyl acetate and methylcyclohexane, and uniformly dispersing at the rotation speed of 650r/min to obtain the degradable sealant.
The antioxidant is 1010; the plasticizer is epoxidized soybean oil.
The photocatalyst is modified titanium dioxide, and the preparation method of the modified titanium dioxide comprises the following steps:
s31: adding 15mL of butyl titanate into 20mL of absolute ethanol, and stirring and dispersing to form a transparent butyl titanate-ethanol solution;
s32: adding urea into nitric acid solution with the concentration of 1mol/L of 30mL of substance, and stirring and dispersing to form urea-nitric acid solution;
s33: dropwise adding a butyl titanate-ethanol solution into a urea-nitric acid solution, uniformly stirring, adjusting the pH to 7 by using a sodium hydroxide solution with the mass concentration of 1mol/L, heating in an oil bath, stirring and reacting for 2.5 under the conditions that the temperature is 80 ℃ and the rotating speed is 150r/min, washing the reaction solution by using deionized water, and centrifuging to obtain a precipitate;
s34: drying the precipitate, heating to 400 ℃ at the heating rate of 5 ℃/min, and then roasting at constant temperature for 4h to obtain the modified titanium dioxide.
The weight ratio of the butyl titanate to the urea is 1: 2.
The preparation method of the degradation material comprises the following steps:
s51: weighing 100 parts of corn fiber and 50 parts of polypropylene according to the parts by weight for later use;
s52: heating and melting polypropylene, adding corn fiber into the melted polypropylene, uniformly mixing, adding the mixture of the polypropylene and the corn fiber into a double-screw granulator for granulation, dehydrating, spin-drying and air-cooling the prepared granules, and drying the granules at the temperature of 125 ℃ for 1.5 hours to obtain the degraded material.
The preparation method of the modified rubber comprises the following steps:
s61: weighing 70 parts of natural rubber, 30 parts of butadiene styrene rubber, 2 parts of sulfur, 0.7 part of accelerator CZ, 3 parts of zinc oxide, 2 parts of stearic acid, 1.5 parts of anti-aging agent CPPD, 1.0 part of paraffin, 50 parts of super wear-resistant furnace black, 10 parts of dimethylbenzene, 5 parts of modified nylon short fiber and 30 parts of modified montmorillonite according to parts by weight;
s62: firstly, plasticating natural rubber for 8min, then adding styrene butadiene rubber, mixing for 15min, then adding an accelerator CZ, zinc oxide, stearic acid and an anti-aging agent CPPD, mixing for 35min, and finally adding paraffin, super wear-resistant furnace black and xylene, and uniformly mixing to obtain a mixed rubber material;
s63: adding the modified nylon short fiber and the modified montmorillonite into the mixed rubber material, mixing for 1.5h, then adding sulfur, and mixing uniformly to obtain the modified rubber.
The preparation method of the modified nylon short fiber comprises the following steps:
s71: dissolving a coupling agent in absolute ethyl alcohol to prepare a coupling agent-ethyl alcohol solution with the mass fraction of 2%, uniformly spraying the coupling agent-ethyl alcohol solution on the nylon short fibers, then placing the nylon short fibers in an oven, removing the absolute ethyl alcohol at the temperature of 85 ℃, heating to 130 ℃, and reacting for 30min at constant temperature to obtain the nylon short fibers with surface treatment;
s72: adding benzoyl peroxide into toluene to prepare a benzoyl peroxide-toluene solution with the mass fraction of 1%, adding carboxylic styrene-butadiene latex into the benzoyl peroxide-toluene solution, and uniformly mixing to obtain a carboxylic styrene-butadiene latex solution with the mass fraction of 5%;
s73: and (3) soaking the nylon short fiber subjected to surface treatment in a carboxylic styrene-butadiene latex solution for 15min, then placing the nylon short fiber in a drying box, and drying the nylon short fiber for 90min at the temperature of 110 ℃ to obtain the modified nylon short fiber.
The preparation method of the modified montmorillonite comprises the following steps:
s81: mixing sodium montmorillonite and hexadecyl trimethyl ammonium bromide according to the weight ratio of 10:1, adding the mixture into distilled water, and stirring and dispersing uniformly at the temperature of 85 ℃ to obtain a mixed solution with the mass fraction of 5%;
s82: and (2) carrying out ultrasonic treatment on the mixed solution for 50min, then stirring for 1.5h to obtain floccule, filtering the floccule, washing the floccule with distilled water until no precipitate is detected by using 0.1mol/L silver nitrate solution, drying the floccule, and then crushing to obtain the modified montmorillonite.
Example 3:
the embodiment is a production process of degradable sealant, which comprises the following steps:
the method comprises the following steps: weighing 60 parts of modified rubber, 8 parts of chlorinated polyethylene, 0.4 part of calcium stearate, 0.04 part of antioxidant, 5 parts of plasticizer, 0.5 part of photocatalyst, 5 parts of degradation material, 25 parts of butyl acetate and 20 parts of methylcyclohexane according to parts by weight for later use;
step two: plasticating the modified rubber and the chlorinated polyethylene to obtain a plasticated material, then uniformly mixing the plasticated material, the calcium stearate, the antioxidant, the plasticizer, the photocatalyst and the degradation material, cooling and cutting into particles to obtain a mixed material;
step three: and adding the mixed materials into a mixed solution of butyl acetate and methylcyclohexane, and uniformly dispersing under the condition of the rotating speed of 800r/min to obtain the degradable sealant.
The antioxidant is an antioxidant 1076; the plasticizer is epoxidized soybean oil.
The photocatalyst is modified titanium dioxide, and the preparation method of the modified titanium dioxide comprises the following steps:
s31: adding 15mL of butyl titanate into 20mL of absolute ethanol, and stirring and dispersing to form a transparent butyl titanate-ethanol solution;
s32: adding urea into nitric acid solution with the concentration of 1mol/L of 30mL of substance, and stirring and dispersing to form urea-nitric acid solution;
s33: dropwise adding a butyl titanate-ethanol solution into a urea-nitric acid solution, uniformly stirring, adjusting the pH to 7 by using a sodium hydroxide solution with the mass concentration of 1mol/L, heating in an oil bath, stirring and reacting for 3 hours at the temperature of 90 ℃ and the rotating speed of 200r/min, washing the reaction solution by using deionized water, and centrifuging to obtain a precipitate;
s34: drying the precipitate, heating to 400 ℃ at the heating rate of 5 ℃/min, and then roasting at constant temperature for 4h to obtain the modified titanium dioxide.
The weight ratio of the butyl titanate to the urea is 1: 3.
The preparation method of the degradation material comprises the following steps:
s51: weighing 110 parts of corn fiber and 60 parts of polypropylene according to the parts by weight for later use;
s52: heating and melting polypropylene, adding corn fiber into the melted polypropylene, uniformly mixing, adding the mixture of the polypropylene and the corn fiber into a double-screw granulator for granulation, dehydrating, spin-drying and air-cooling the prepared granules, and drying the granules for 2 hours at the temperature of 140 ℃ to obtain the degradation material.
The preparation method of the modified rubber comprises the following steps:
s61: weighing 80 parts of natural rubber, 40 parts of butadiene styrene rubber, 3 parts of sulfur, 0.9 part of accelerator CZ, 5 parts of zinc oxide, 3 parts of stearic acid, 2 parts of anti-aging agent CPPD, 1.5 parts of paraffin, 60 parts of super wear-resistant furnace black, 13 parts of dimethylbenzene, 6 parts of modified nylon short fibers and 40 parts of modified montmorillonite according to parts by weight;
s62: firstly, plasticating natural rubber for 10min, then adding styrene butadiene rubber, mixing for 20min, then adding an accelerator CZ, zinc oxide, stearic acid and an anti-aging agent CPPD, mixing for 40min, and finally adding paraffin, super wear-resistant furnace black and xylene, and uniformly mixing to obtain a mixed rubber material;
s63: adding the modified nylon short fiber and the modified montmorillonite into the mixed rubber material, mixing for 2 hours, then adding sulfur, and mixing uniformly to obtain the modified rubber.
The preparation method of the modified nylon short fiber comprises the following steps:
s71: dissolving a coupling agent in absolute ethyl alcohol to prepare a coupling agent-ethyl alcohol solution with the mass fraction of 2%, uniformly spraying the coupling agent-ethyl alcohol solution on the nylon short fibers, then placing the nylon short fibers in an oven, removing the absolute ethyl alcohol at the temperature of 90 ℃, heating to 130 ℃, and reacting for 30min at constant temperature to obtain the nylon short fibers with surface treatment;
s72: adding benzoyl peroxide into toluene to prepare a benzoyl peroxide-toluene solution with the mass fraction of 1%, adding carboxylic styrene-butadiene latex into the benzoyl peroxide-toluene solution, and uniformly mixing to obtain a carboxylic styrene-butadiene latex solution with the mass fraction of 5%;
s73: and (3) soaking the nylon short fiber subjected to surface treatment in a carboxylic styrene-butadiene latex solution for 20min, then placing the nylon short fiber in a drying box, and drying the nylon short fiber for 90min at the temperature of 110 ℃ to obtain the modified nylon short fiber.
The preparation method of the modified montmorillonite comprises the following steps:
s81: mixing sodium montmorillonite and hexadecyl trimethyl ammonium bromide according to the weight ratio of 10:1, adding the mixture into distilled water, and stirring and dispersing uniformly at the temperature of 90 ℃ to obtain a mixed solution with the mass fraction of 5%;
s82: and (2) carrying out ultrasonic treatment on the mixed solution for 60min, then stirring for 2h to obtain floccule, filtering the floccule, washing with distilled water until no precipitate is detected by using 0.1mol/L silver nitrate solution, drying the floccule, and then crushing to obtain the modified montmorillonite.
Comparative example 1:
the comparison example is a common sealant on the market.
Comparative example 2:
in the comparative example, the common rubber is used for replacing the modified rubber, the common titanium dioxide is used for replacing the modified titanium dioxide and is used as the photocatalyst, and no degradation material is added.
The sealants of examples 1-3 and comparative examples 1-2 were tested and the results are shown in the following table:
according to the table, compared with other sealants, the degradable sealant disclosed by the invention has the advantages of excellent pressure resistance, wide applicable temperature range and good degradation performance, and can effectively reduce the pollution to the environment.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (8)
1. A production process of degradable sealant is characterized by comprising the following steps:
the method comprises the following steps: weighing 40-60 parts of modified rubber, 4-8 parts of chlorinated polyethylene, 0.2-0.4 part of calcium stearate, 0.02-0.04 part of antioxidant, 2-5 parts of plasticizer, 0.1-0.5 part of photocatalyst, 3-5 parts of degradation material, 15-25 parts of butyl acetate and 12-20 parts of methylcyclohexane according to parts by weight for later use;
step two: plasticating the modified rubber and the chlorinated polyethylene to obtain a plasticated material, then uniformly mixing the plasticated material, the calcium stearate, the antioxidant, the plasticizer, the photocatalyst and the degradation material, cooling and cutting into particles to obtain a mixed material;
step three: and adding the mixed material into a mixed solution of butyl acetate and methylcyclohexane, and uniformly dispersing at the rotation speed of 500-800r/min to obtain the degradable sealant.
2. The process for producing a degradable sealant according to claim 1, wherein the antioxidant is one of antioxidant 168, antioxidant 1010 and antioxidant 1076; the plasticizer is epoxidized soybean oil.
3. The production process of the degradable sealant according to claim 1, wherein the photocatalyst is modified titanium dioxide, and the preparation method of the modified titanium dioxide comprises the following steps:
s31: adding 15mL of butyl titanate into 20mL of absolute ethanol, and stirring and dispersing to form a transparent butyl titanate-ethanol solution;
s32: adding urea into nitric acid solution with the concentration of 1mol/L of 30mL of substance, and stirring and dispersing to form urea-nitric acid solution;
s33: dropwise adding a butyl titanate-ethanol solution into a urea-nitric acid solution, uniformly stirring, adjusting the pH to 7 by using a sodium hydroxide solution with the mass concentration of 1mol/L, heating in an oil bath, stirring and reacting for 2-3h under the conditions that the temperature is 70-90 ℃ and the rotating speed is 100-200r/min, washing the reaction liquid by using deionized water, and centrifuging to obtain a precipitate;
s34: drying the precipitate, heating to 400 ℃ at the heating rate of 5 ℃/min, and then roasting at constant temperature for 4h to obtain the modified titanium dioxide.
4. The process for producing the degradable sealant according to claim 3, wherein the weight ratio of the butyl titanate to the urea is 1: 1-3.
5. The process for producing the degradable sealant according to claim 1, wherein the degradable material is prepared by the following steps:
s51: weighing 90-110 parts of corn fiber and 40-60 parts of polypropylene according to parts by weight for later use;
s52: heating and melting polypropylene, adding corn fiber into the melted polypropylene, uniformly mixing, adding the mixture of the polypropylene and the corn fiber into a double-screw granulator for granulation, dehydrating, spin-drying and air-cooling the prepared granules, and drying the granules for 1-2 hours at the temperature of 110-140 ℃ to obtain the degradation material.
6. The production process of the degradable sealant according to claim 1, wherein the preparation method of the modified rubber is as follows:
s61: weighing 60-80 parts of natural rubber, 20-40 parts of styrene butadiene rubber, 1-3 parts of sulfur, 0.5-0.9 part of accelerator CZ, 1-5 parts of zinc oxide, 1-3 parts of stearic acid, 8-2 parts of anti-aging agent CPPD1, 0.5-1.5 parts of paraffin, 40-60 parts of super wear-resistant furnace black, 7-13 parts of dimethylbenzene, 4-6 parts of modified nylon short fiber and 20-40 parts of modified montmorillonite according to parts by weight;
s62: firstly, plasticating natural rubber for 5-10min, then adding styrene butadiene rubber for mixing for 10-20min, then adding an accelerator CZ, zinc oxide, stearic acid and an anti-aging agent CPPD for mixing for 30-40min, and finally adding paraffin, super wear-resistant furnace black and xylene for uniformly mixing to obtain a mixed rubber material;
s63: adding the modified nylon short fiber and the modified montmorillonite into the mixed rubber material, mixing for 1-2h, then adding sulfur, and mixing uniformly to obtain the modified rubber.
7. The production process of the degradable sealant according to claim 6, wherein the preparation method of the modified nylon staple fiber comprises the following steps:
s71: dissolving a coupling agent in absolute ethyl alcohol to prepare a coupling agent-ethyl alcohol solution with the mass fraction of 2%, uniformly spraying the coupling agent-ethyl alcohol solution on the nylon short fibers, then placing the nylon short fibers in an oven to remove the absolute ethyl alcohol at the temperature of 80-90 ℃, heating to 130 ℃, and reacting at the constant temperature for 30min to obtain the nylon short fibers with surface treatment;
s72: adding benzoyl peroxide into toluene to prepare a benzoyl peroxide-toluene solution with the mass fraction of 1%, adding carboxylic styrene-butadiene latex into the benzoyl peroxide-toluene solution, and uniformly mixing to obtain a carboxylic styrene-butadiene latex solution with the mass fraction of 5%;
s73: and (3) soaking the nylon short fiber subjected to surface treatment in a carboxylic styrene-butadiene latex solution for 10-20min, then placing the nylon short fiber in a drying box, and drying the nylon short fiber for 90min at the temperature of 110 ℃ to obtain the modified nylon short fiber.
8. The process for producing degradable sealant according to claim 6, wherein the preparation method of the modified montmorillonite comprises the following steps:
s81: mixing sodium montmorillonite and hexadecyl trimethyl ammonium bromide according to the weight ratio of 10:1, adding the mixture into distilled water, and stirring and dispersing uniformly at the temperature of 80-90 ℃ to obtain a mixed solution with the mass fraction of 5%;
s82: and (2) carrying out ultrasonic treatment on the mixed solution for 40-60min, then stirring for 1-2h to obtain floccule, filtering the floccule, washing with distilled water until no precipitate is detected by using 0.1mol/L silver nitrate solution, drying the floccule, and then crushing to obtain the modified montmorillonite.
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| CN113703209A (en) * | 2021-07-29 | 2021-11-26 | 惠科股份有限公司 | Display panel manufacturing method, display panel and liquid crystal display |
| CN113703209B (en) * | 2021-07-29 | 2023-04-25 | 惠科股份有限公司 | Display panel manufacturing method, display panel and liquid crystal display |
| CN113861883A (en) * | 2021-10-05 | 2021-12-31 | 襄阳封神新材料有限公司 | Production process of degradable sealant |
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Application publication date: 20210409 |