CN104962019A - Environment-friendly high-polymer board with oil resistance and high temperature resistance performances and preparation method thereof - Google Patents
Environment-friendly high-polymer board with oil resistance and high temperature resistance performances and preparation method thereof Download PDFInfo
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- CN104962019A CN104962019A CN201510412972.6A CN201510412972A CN104962019A CN 104962019 A CN104962019 A CN 104962019A CN 201510412972 A CN201510412972 A CN 201510412972A CN 104962019 A CN104962019 A CN 104962019A
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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
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/22—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers modified by chemical after-treatment
- C08L27/24—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers modified by chemical after-treatment halogenated
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- 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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- General Chemical & Material Sciences (AREA)
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- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to an environment-friendly high-polymer board with oil resistance and high temperature resistance performances. The environment-friendly high-polymer board consists of the following components as raw materials in parts by weight: 30-35 parts of waste residues of a power plant, 20-30 parts of asphalt, 35-45 parts of chlorinated polyvinyl chloride resin and the like. According to the environment-friendly high-polymer board disclosed by the invention, blast furnace steel slag, pulverized fuel ash, flue gas desulfurization gypsum and other industrial solid wastes and cement are taken as main raw materials and are blended with wollastonite powder and slaked lime, so that the environment-friendly high-polymer board not only has the capabilities of reducing the pollution of emission of the industrial solid wastes to the environment and realizing heat insulation and heat preservation, but also has economic and social benefits of changing wastes into valuables. The environment-friendly high-polymer board can be used for effectively overcoming the defects of low-temperature embrittleness, high temperature flowing and the like after film formation, and meanwhile, has the advantages of relatively high elastic recovery rate, good stability, long storage time, fire resistance, flame retardance and the like. Polyurethane elastomer added to the board has excellent wear resistance and oil resistance, belongs to a polar polymer which can be organically combined with polypropylene, and has the capability of effectively improving the mechanical property of a polypropylene cable material; added fluororubber has the properties of high temperature resistance, oil resistance and the like; added other filler has the capability of enhancing other physical properties and processability of cables.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of environment protection type sheet material of superpolymer oil-resistant high-temperature performance.
Background technology
Pitch is a kind of important architectural waterproof material, because its water resistance is excellent, low price and being widely used.Polymer modified asphalt waterproof roll becomes because it possesses excellent high temperature performance the architectural waterproof material received much concern.But polymer modified asphalt waterproof roll is the same with common organic materials, easily can occur aging by the effect of the factors such as UV-light, heat, oxygen, cause that waterproof roll is hardening to become fragile, low temperature flexibility reduces fast, be difficult to the shrinkage of adaptation roof-base in the winter time under low temperature and occur cracking, thus cause waterproof layer to destroy, cause roof leakage, substantially reduce the work-ing life of roof waterpoof material.Therefore, improve the ageing-resistant performance of roofing flux, significant to the weather resistance improving building roof.
Carry out modification with thermoplastic elastomer to pitch, at home and abroad existing history for many years, using maximum is styrene-butadiene-styrene inlay section thermal plastic elastic body (SBS).SBS modifying asphalt has excellent high-and low-temperature resistance performance and elastic recovery properties, is the kind that in current polymer modified asphalt, consumption is maximum.But pitch and elastomer modifier are mainly containing C-H, C-C and C=C, and the effect in use by factors such as UV-light, oxygen, heat causes chemical bond rupture, and composition and structure changes, and causes performance degradation, work-ing life shortens.
Some research reports are had about raising elastomer modified asphalt roof waterpoof material ageing-resistant performance.Chinese patent CN102190957A proposes to add magnesium-aluminum-based laminar double hydroxide in pitch, utilize magnesium-aluminum-based laminar double hydroxide to ultraviolet physical shielding effect, improve the anti-ultraviolet ageing ability of elastomer-modified body pitch, but pitch in use occur except being subject to action of ultraviolet light aging except, also can be subject to the effect generation thermo-oxidative ageing of heat, oxygen, and magnesium-aluminum-based laminar double hydroxide is improving the effect of pitch heatproof air aging performance and not obvious.Oxidation inhibitor is joined in pitch, the thermo oxidative aging ability of pitch can be improved to a certain extent, but because oxidation inhibitor is low molecular weight organic compound, easily to be heated when it mixes under the high temperature conditions with heated bitumen volatilization, and itself also can reduce thermo oxidative aging ability because of aging, cause oxidation inhibitor can not be effective for a long time to the anti-aging effect of pitch.
Elastomerics (SBS) modified asphalt waterproof coiled material because having, drop down, crack resistance at low-temperature is widely used in waterproofing work by good high temperature anti-current.But asphaltic base waterproof roll in use can be subject to the impact of the factors such as light, heat, oxygen and occur aging, cause that waterproof roll is hardening to become fragile, low temperature flexibility significantly reduces.For SBS modified asphalt waterproof coiled material, agingly not only comprise the aging of pitch, also comprise the aging of SBS.For extending the work-ing life of elastomer modified asphalt waterproof roll, pole is necessary the ageing-resistant performance improving elastomer modified asphalt.Laminated dihydroxy composite metal hydroxide (LDHs) is a class supramolecule layer structure material.LDHs forms multi-stage superimposed laminate structure by layered double-hydroxide laminate and interlayer anion, and its inorganic laminate can play physical shielding effect to ultraviolet; If by between organic uv absorbers interposed layer, LDHs will be made to have the dual function of physical shielding and absorption to ultraviolet simultaneously.In addition, ultraviolet is when laminate multistage by LDHs, and higher order reflection and refraction can occur on layer ineface, energy also can weaken.
The present invention utilizes the industrial residues such as slag, flyash and desulfurated plaster to prepare a kind of environment protection type sheet material of superpolymer oil-resistant high-temperature performance, give full play to the synergy between different solid waste, produce and obtain the material of construction meeting national standard, not only can realize the comprehensive utilization of industrial solid wastes, the pollution of solid waste discharge to environment can also be reduced.
Summary of the invention
The object of this invention is to provide a kind of environment protection type sheet material of superpolymer oil-resistant high-temperature performance, thus water-proof material and the preparation method in the work-ing life of elastomer modified asphalt water-proof material can be extended.
An environment protection type sheet material for superpolymer oil-resistant high-temperature performance, is characterized in that its raw material is grouped into by the one-tenth of following weight part: plant residue 30-35 part, pitch 20-30 part, chlorinated polyvinyl chloride resin 35-45 part, polyurethane elastomer 15-20 part, tetrafluoraoethylene-hexafluoropropylene copolymer 20-30 part, polyisoprene rubber 4-6 part, functional stuffing 20-25 part, expanding material rubber oil 15 ~ 18 parts.
Described plant residue is flyash and desulfurated plaster weight ratio is 5 ~ 10:10, and its particle dia is 0.04 ~ 20 μm;
Described pitch is heavy-duty road petroleum pitch or naphthenic base oil pitch, and penetration degree is 55 ~ 100;
Described functional stuffing is hollow glass micropearl, nanometer antimony-doped stannic oxide, closed perlite, titanium dioxide are the mixture of 1:1:1:1 according to mass ratio;
Described pitch is petroleum pitch or coal-tar pitch, and its penetration degree scope is 50 ~ 1101/10mm, and softening temperature is 40 ~ 100 DEG C; Described expanding material rubber oil is that aromaticity content is greater than 65% and the rubber oil of flash-point >=200 DEG C.
The environment protection type sheet material of described superpolymer oil-resistant high-temperature performance, is characterized in that carrying out as follows:
A: blend feedstock: take raw material by proportioning and put into conical double ribbon and revolve in stirrer and stir, churning time is 8-15 minute, obtains the mixture after stirring;
B: the preparation of slip: raw material mixing is placed in 40-50 DEG C of tank and carries out being uniformly mixed uniformly slip, then add water and pull an oar, then the compound of releasing is added conical double ribbon revolve in stirrer, then stir 5-40 minute; Compound and water ratio is by weight percentage: compound: 10%; Water: 90%;
C: the preparation of blanket: carry out after blowing until slip, slip is evenly distributed on felt through conveyer trough, also forms fine and close hair plates blank by vacuum pump adsorption dewatering, then through shaping roller compression molding, via the demoulding of stripper vacuum;
D: steam-cured: after the demoulding blanket through 150 DEG C, steam-cured under 1.5-2Mpa high pressure;
E: dry: steam-cured rear blanket is dried in the dryer of 50-100 DEG C, makes blanket water content be less than 7%;
F: polishing: polish smooth goods by grinder and put in storage.
An environment protection type sheet material for superpolymer oil-resistant high-temperature performance, is characterized in that: in steam-cured step, the heating-up time is 3 hours, and after being raised to 160 DEG C, constant temperature keeps 3 hours, and then lower the temperature 4 hours, the sheet material water content after steam-cured is 5wt%.
Beneficial effect of the present invention is as follows:
The present invention with the Industrial Solid Wastes such as blast furnace slag, flyash and desulfurated plaster and cement for main raw material, and allocate wollastonite powder and slaked lime powder into, product tool can not only reduce the pollution of Industrial Solid Waste discharge to environment, and heat-insulation and heat-preservation, can also play the economic and social benefit of turning waste into wealth.Effectively can resist low-temperature embrittleness after film forming, the shortcomings such as high temperature trickling, have elastic recovery rate higher simultaneously, the advantages such as good stability and storage time length, fire resistant flame retardant.The polyurethane elastomer that the present invention adds has excellent wear-resisting, oil resistance, and belong to polar polymer can and polypropylene be combined into one, can effectively improve polyacrylic mechanical property; The viton added has high temperature resistant, resistance to wet goods characteristic, and other fillers added can strengthen other physicalies and processing characteristics.
Embodiment
In order to make the object of patent protection of the present invention, technical scheme and advantage clearly understand, below the present invention is further elaborated.
Embodiment 1
An environment protection type sheet material for superpolymer oil-resistant high-temperature performance, is characterized in that its raw material is grouped into by the one-tenth of following weight part: plant residue 30 parts, pitch 20 parts, chlorinated polyvinyl chloride resin 35 parts, polyurethane elastomer 15 parts, tetrafluoraoethylene-hexafluoropropylene copolymer 20 parts, polyisoprene rubber 4 parts, functional stuffing 20 parts, expanding material rubber oil 15 parts.
Described plant residue is flyash and desulfurated plaster weight ratio is 5: 10, and its particle dia is 0.04 μm;
Described pitch is heavy-duty road petroleum pitch or naphthenic base oil pitch, and penetration degree is 55;
Described functional stuffing is hollow glass micropearl, nanometer antimony-doped stannic oxide, closed perlite, titanium dioxide are the mixture of 1:1:1:1 according to mass ratio;
Described pitch is petroleum pitch or coal-tar pitch, and its penetration degree scope is 50/10mm, and softening temperature is 40 DEG C; Described expanding material rubber oil is that aromaticity content is greater than 65% and the rubber oil of flash-point >=200 DEG C.
The environment protection type sheet material of described superpolymer oil-resistant high-temperature performance, is characterized in that carrying out as follows:
A: blend feedstock: take raw material by proportioning and put into conical double ribbon and revolve in stirrer and stir, churning time is 8 minutes, obtains the mixture after stirring;
B: the preparation of slip: raw material mixing is placed in 40 DEG C of tanks and carries out being uniformly mixed uniformly slip, then add water and pull an oar, then the compound of releasing is added conical double ribbon revolve in stirrer, then stir 5 minutes; Compound and water ratio is by weight percentage: compound: 10%; Water: 90%;
C: the preparation of blanket: carry out after blowing until slip, slip is evenly distributed on felt through conveyer trough, also forms fine and close hair plates blank by vacuum pump adsorption dewatering, then through shaping roller compression molding, via the demoulding of stripper vacuum;
D: steam-cured: after the demoulding blanket through 150 DEG C, steam-cured under 1.5 Mpa high pressure;
E: dry: steam-cured rear blanket is dried in the dryer of 50 DEG C, makes blanket water content be less than 7%;
F: polishing: polish smooth goods by grinder and put in storage.
An environment protection type sheet material for superpolymer oil-resistant high-temperature performance, is characterized in that: in steam-cured step, the heating-up time is 3 hours, and after being raised to 160 DEG C, constant temperature keeps 3 hours, and then lower the temperature 4 hours, the sheet material water content after steam-cured is 5wt%.
Embodiment 2
An environment protection type sheet material for superpolymer oil-resistant high-temperature performance, is characterized in that its raw material is grouped into by the one-tenth of following weight part: plant residue 35 parts, pitch 30 parts, chlorinated polyvinyl chloride resin 45 parts, polyurethane elastomer 20 parts, tetrafluoraoethylene-hexafluoropropylene copolymer 30 parts, polyisoprene rubber 6 parts, functional stuffing 25 parts, expanding material rubber oil 18 parts.
Described plant residue is flyash and desulfurated plaster weight ratio is 10:10, and its particle dia is 20 μm;
Described pitch is heavy-duty road petroleum pitch or naphthenic base oil pitch, and penetration degree is 100;
Described functional stuffing is hollow glass micropearl, nanometer antimony-doped stannic oxide, closed perlite, titanium dioxide are the mixture of 1:1:1:1 according to mass ratio;
Described pitch is petroleum pitch or coal-tar pitch, and its penetration degree scope is 1101/10mm, and softening temperature is 100 DEG C; Described expanding material rubber oil is that aromaticity content is greater than 65% and the rubber oil of flash-point >=200 DEG C.
The environment protection type sheet material of described superpolymer oil-resistant high-temperature performance, is characterized in that carrying out as follows:
A: blend feedstock: take raw material by proportioning and put into conical double ribbon and revolve in stirrer and stir, churning time is 15 minutes, obtains the mixture after stirring;
B: the preparation of slip: raw material mixing is placed in 50 DEG C of tanks and carries out being uniformly mixed uniformly slip, then add water and pull an oar, then the compound of releasing is added conical double ribbon revolve in stirrer, then stir 40 minutes; Compound and water ratio is by weight percentage: compound: 10%; Water: 90%;
C: the preparation of blanket: carry out after blowing until slip, slip is evenly distributed on felt through conveyer trough, also forms fine and close hair plates blank by vacuum pump adsorption dewatering, then through shaping roller compression molding, via the demoulding of stripper vacuum;
D: steam-cured: after the demoulding blanket through 150 DEG C, steam-cured under 2Mpa high pressure;
E: dry: steam-cured rear blanket is dried in the dryer of 100 DEG C, makes blanket water content be less than 7%;
F: polishing: polish smooth goods by grinder and put in storage.
An environment protection type sheet material for superpolymer oil-resistant high-temperature performance, is characterized in that: in steam-cured step, the heating-up time is 3 hours, and after being raised to 160 DEG C, constant temperature keeps 3 hours, and then lower the temperature 4 hours, the sheet material water content after steam-cured is 5wt%.
The present invention with the Industrial Solid Wastes such as blast furnace slag, flyash and desulfurated plaster and cement for main raw material, and allocate wollastonite powder and slaked lime powder into, product tool can not only reduce the pollution of Industrial Solid Waste discharge to environment, and heat-insulation and heat-preservation, can also play the economic and social benefit of turning waste into wealth.Effectively can resist low-temperature embrittleness after film forming, the shortcomings such as high temperature trickling, have elastic recovery rate higher simultaneously, the advantages such as good stability and storage time length, fire resistant flame retardant.The polyurethane elastomer that the present invention adds has excellent wear-resisting, oil resistance, and belong to polar polymer can and polypropylene be combined into one, can effectively improve polyacrylic mechanical property; The viton added has high temperature resistant, resistance to wet goods characteristic, and other fillers added can strengthen other physicalies and processing characteristics.
Claims (5)
1. an environment protection type sheet material for superpolymer oil-resistant high-temperature performance, is characterized in that its raw material is grouped into by the one-tenth of following weight part: plant residue 30-35 part, pitch 20-30 part, chlorinated polyvinyl chloride resin 35-45 part, polyurethane elastomer 15-20 part, tetrafluoraoethylene-hexafluoropropylene copolymer 20-30 part, polyisoprene rubber 4-6 part, functional stuffing 20-25 part, expanding material rubber oil 15 ~ 18 parts.
2. the environment protection type sheet material of superpolymer oil-resistant high-temperature performance as claimed in claim 1, is characterized in that it is grouped into by the one-tenth of following weight part:
Described plant residue is flyash and desulfurated plaster weight ratio is 5 ~ 10:10, and its particle dia is 0.04 ~ 20 μm;
Described pitch is heavy-duty road petroleum pitch or naphthenic base oil pitch, and penetration degree is 55 ~ 100;
Described functional stuffing is hollow glass micropearl, nanometer antimony-doped stannic oxide, closed perlite, titanium dioxide are the mixture of 1:1:1:1 according to mass ratio.
3. the environment protection type sheet material of superpolymer oil-resistant high-temperature performance as claimed in claim 1, it is characterized in that: described pitch is petroleum pitch or coal-tar pitch, its penetration degree scope is 50 ~ 1101/10mm, and softening temperature is 40 ~ 100 DEG C; Described expanding material rubber oil is that aromaticity content is greater than 65% and the rubber oil of flash-point >=200 DEG C.
4. the environment protection type sheet material of superpolymer oil-resistant high-temperature performance as claimed in claim 1, is characterized in that carrying out as follows:
A: blend feedstock: take raw material by proportioning and put into conical double ribbon and revolve in stirrer and stir, churning time is 8-15 minute, obtains the mixture after stirring;
B: the preparation of slip: raw material mixing is placed in 40-50 DEG C of tank and carries out being uniformly mixed uniformly slip, then add water and pull an oar, then the compound of releasing is added conical double ribbon revolve in stirrer, then stir 5-40 minute; Compound and water ratio is by weight percentage: compound: 10%; Water: 90%;
C: the preparation of blanket: carry out after blowing until slip, slip is evenly distributed on felt through conveyer trough, also forms fine and close hair plates blank by vacuum pump adsorption dewatering, then through shaping roller compression molding, via the demoulding of stripper vacuum;
D: steam-cured: after the demoulding blanket through 150 DEG C, steam-cured under 1.5-2Mpa high pressure;
E: dry: steam-cured rear blanket is dried in the dryer of 50-100 DEG C, makes blanket water content be less than 7%;
F: polishing: polish smooth goods by grinder and put in storage.
5. the environment protection type sheet material of a kind of superpolymer oil-resistant high-temperature performance according to claim 3, it is characterized in that: in steam-cured step, the heating-up time is 3 hours, after being raised to 160 DEG C, constant temperature keeps 3 hours, and then lower the temperature 4 hours, the sheet material water content after steam-cured is 5wt%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510412972.6A CN104962019A (en) | 2015-07-15 | 2015-07-15 | Environment-friendly high-polymer board with oil resistance and high temperature resistance performances and preparation method thereof |
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| CN201510412972.6A CN104962019A (en) | 2015-07-15 | 2015-07-15 | Environment-friendly high-polymer board with oil resistance and high temperature resistance performances and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419865A (en) * | 2016-05-24 | 2017-12-01 | 梁奉君 | Deck wall face fire-type water-proof, heat-insulating, heat-preserving decorative panel and preparation method thereof |
| CN109627742A (en) * | 2018-11-29 | 2019-04-16 | 荣德铵家新型材料(福州)有限公司 | A kind of method that sintering flue gas desulfurization ash prepares polyurethane plate |
| CN111607208A (en) * | 2020-06-16 | 2020-09-01 | 福建师范大学福清分校 | Preparation method of desulfurized fly ash/unsaturated resin composite material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847318A (en) * | 2005-04-06 | 2006-10-18 | 许政道 | Compositions and manufacturing methods of bitumen modifiers having complex functionality |
| CN101608026A (en) * | 2008-06-19 | 2009-12-23 | 中国石油化工股份有限公司 | A kind of hard pitch properties-correcting agent and with a kind of shallow degree modifying asphalt of its modification |
| CN102051017A (en) * | 2009-11-09 | 2011-05-11 | 赢创德固赛有限公司 | Thermoplastic elastomer mixtures |
-
2015
- 2015-07-15 CN CN201510412972.6A patent/CN104962019A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847318A (en) * | 2005-04-06 | 2006-10-18 | 许政道 | Compositions and manufacturing methods of bitumen modifiers having complex functionality |
| CN101608026A (en) * | 2008-06-19 | 2009-12-23 | 中国石油化工股份有限公司 | A kind of hard pitch properties-correcting agent and with a kind of shallow degree modifying asphalt of its modification |
| CN102051017A (en) * | 2009-11-09 | 2011-05-11 | 赢创德固赛有限公司 | Thermoplastic elastomer mixtures |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419865A (en) * | 2016-05-24 | 2017-12-01 | 梁奉君 | Deck wall face fire-type water-proof, heat-insulating, heat-preserving decorative panel and preparation method thereof |
| CN109627742A (en) * | 2018-11-29 | 2019-04-16 | 荣德铵家新型材料(福州)有限公司 | A kind of method that sintering flue gas desulfurization ash prepares polyurethane plate |
| CN111607208A (en) * | 2020-06-16 | 2020-09-01 | 福建师范大学福清分校 | Preparation method of desulfurized fly ash/unsaturated resin composite material |
| CN111607208B (en) * | 2020-06-16 | 2022-09-16 | 福建技术师范学院 | Preparation method of desulfurized fly ash/unsaturated resin composite material |
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Application publication date: 20151007 |