CN105131411A - Polyethylene material for rotationally molded urea box and preparation method for polyethylene material - Google Patents
Polyethylene material for rotationally molded urea box and preparation method for polyethylene material Download PDFInfo
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- CN105131411A CN105131411A CN201510535991.8A CN201510535991A CN105131411A CN 105131411 A CN105131411 A CN 105131411A CN 201510535991 A CN201510535991 A CN 201510535991A CN 105131411 A CN105131411 A CN 105131411A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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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
- C08K5/00—Use of organic ingredients
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92209—Temperature
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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
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Moulding By Coating Moulds (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a polyethylene material for a rotationally molded urea box and a preparation method for the polyethylene material. The polyethylene material is prepared by mixing the following components in percentage by mass: 74.4-92.8% of metallocene linear low density polyethylene, 5-15% of ultralow density polyethylene, 2-10% of polyisobutene and 0.2-0.6% of a processing agent. The polyethylene material disclosed by the invention has the characteristics of being good in adhesion with metal inserts, good in temperature resistance of a product, good in impact resistance of the product and good in cold and hot alternation resistance of the product.
Description
Technical field
The present invention relates to a kind of modified poly ethylene matrix material, particularly a kind of rotation molding urea box polythene material and preparation method thereof.
Background technology
Rotation molding is that a kind of mould of rotation that utilizes carries out the plastic working mode of processing, its course of processing is, plastic powders or slurry are dropped into mould, mould after closed carries out rotating or waving on equipment, by naked light or hot blast, mold exterior is heated simultaneously, plastic powders or slurry be interior overturn, flowing in mould under the state of being heated, temperature is progressively applied to mould inner surface after reaching softening temperature, melting is also condensed, and is undertaken cooling rear form removal taking-up goods under mould is put in physical environment or by media such as water, mist, wind.In rotation molding, more than 90% goods use polyethylene powders to process.
In the automotive industry, due to the complicacy of operating mode in the densification of structure and vehicle use procedure, require the associated components of automobile, especially the parts of motor part, have high temperature resistant, vibration resistance, the function such as shock resistance and cold-hot alternation.
Environmental protection department due to various countries proposes the requirement of the nitrogen oxides pollution thing reducing diesel engine of vehicle discharge further; engine production business brings into use SCR technology (SelectiveCatalyticReductionTechnology SCR technology) to reach the requirement of environmental administration, and urea tank (loading diesel engine vent gas treatment solution) is the building block of SCR system.
Under normal circumstances, urea tank uses polythene material, is processed by roll moulding shaping technology.In order to the precision that is connected with other accessories such as urea detector, urea tank can the metal inserted piece of pre-buried more complicated in generative process, uses general rotational moulding materials processing, often occurs imperfect bonding between plastics and metal inserted piece, cause the phenomenon of leakage; In addition, urea box need meet the periphery working condition requirement of 80 DEG C, and at this temperature, urea box often deliquescing occurs, distortion, the phenomenon of cold-hot alternation performance deficiency, and the possibility that using function is lost in breakage, leakage etc. can occur in long-time use.
CN102532646A " high-strength durable type rotational-molded automobile urea box " discloses the technical scheme using linear low density polyethylene, high density polyethylene(HDPE), POE, calcium stearate, antioxidant 1010, irgasfos 168, static inhibitor-hydroxyethyl alkylamine to make urea box material requested, mainly solve the problem of the environmental stress resistance difference of urea box material, this material meets the requirement of rotational moulding complete processing, and the work-ing life being made into automobile urea box extends 30%.But how solving in conjunction with problem and temperature tolerance problem of the unexposed and mold insert of this invention.
Summary of the invention
The object of the present invention is to provide a kind of rotation molding urea box polythene material, it is good to have with metal inserted piece cohesiveness, and goods temperature tolerance is good, good impact resistance, feature that cold-hot alternation performance is good.
Present invention also offers the preparation method of above-mentioned rotation molding urea box polythene material.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of rotation molding urea box polythene material, is mixed by following component: metallocene linear low density polyethylene 74.4-92.8%, ultra-low density polyethylene 5-15%, polyisobutene 2-10%, processing aid 0.2-0.6% by mass percentage.
Contriver is through studying discovery for a long period of time, the a part of ultra-low density polyethylene material of specific increase in rotational moulding material, utilize the low-melting feature of ultra-low density polyethylene, impel metal inserted piece to shift to an earlier date plastic adherent powder in rotational moulding process, effectively can improve the bonding situation with metal inserted piece.But because ultra-low density polyethylene intensity difference, temperature tolerance are poor, urea tank overall performance is caused to decline, therefore contriver no longer must not seek solution, find after deliberation, use the metallocene linear low density polyethylene of specified proportion and the compounded materials of polyisobutene, not only can make up the degradation caused owing to adding ultra-low density polyethylene, significantly can also improve the temperature tolerance of rotational moulding urea tank, shock resistance and cold-hot alternation performance.
As preferably, described metallocene linear low density polyethylene, its density is 0.925-0.940g/cm
3, melt flow rate (MFR) 3-6g/10min, tensile strength 15-20MPa, Izod notched impact strength 20-50KJ/m
2.
As preferably, described ultra-low density polyethylene, its density is 0.870-0.910g/cm
3, melt flow rate (MFR) 1-6g/10min.
As preferably, the viscosity-average molecular weight of described polyisobutene is 10000-100000.
As preferably, described processing aid is by antioxidant 1010: irgasfos 168: the part by weight of Zinic stearas=1:2:2 mixes.
A preparation method for rotation molding urea box polythene material, step is as follows:
A. metallocene linear low density polyethylene, polyisobutene and processing aid are dropped in dual-screw pelletizer by proportioning and make particle;
B. the particle of step a and ultra-low density polyethylene particle are mixed in proportion in medium speed mixer;
C. will mix after particle grinds in plastic grinder and obtain finished product.
The present invention is by first using metallocene linear low density polyethylene, polyisobutene and processing aid mixing granulation, the mode of rotational moulding powder is ground to form after adding ultra-low density polyethylene again, be made into a kind of rotation molding urea box polythene material, use the rotomoulded articles of this materials processing, there is the feature of, shock resistance good, high temperature resistant with metal inserted piece cohesiveness, cold-hot alternation excellent property.
As preferably, the processing parameter of dual-screw pelletizer is: temperature 150-200 DEG C, rotating speed 400-600rpm, head pressure 0.1-0.5MPa.
As preferably, the processing parameter of medium speed mixer mixing is: rotating speed 5-30rpm, mixing time 3-10min.
As preferably, the processing parameter of plastic grinder is rate of feeding 25-300Kg/h, speed of grinding plate 2000-4000rpm, mill temperature out≤65 DEG C.
The invention has the beneficial effects as follows:
(1) have with metal inserted piece cohesiveness good, goods temperature tolerance be good, good impact resistance, feature that cold-hot alternation performance is good.
(2) preparation method is simple, without the need to complex apparatus, easily realizes industrial operation.
Embodiment
Below by specific embodiment, technical scheme of the present invention is described in further detail.
In the present invention, if not refer in particular to, the raw material adopted and equipment etc. all can be buied from market or this area is conventional.Method in following embodiment, if no special instructions, is the ordinary method of this area.
The feed composition that the present invention uses is commercially available prod.Wherein the preferred trade mark of metallocene linear low density polyethylene is that the mLLDPE3750M of great Lin company of Korea S (meets density 0.925-0.940g/cm
3, melt flow rate (MFR) (190 DEG C, 2.16Kg) 3-6g/10min, tensile strength 15-20MPa, Izod notched impact strength 20-50KJ/m
2), the preferred trade mark of ultra-low density polyethylene is that the ULDPE4404G of LG-DOW company (meets density 0.870-0.910g/cm
3, melt flow rate (MFR) 1-6g/10min), the preferred trade mark of polyisobutene is the OppanolB12N of German BASF (meeting viscosity-average molecular weight is 10000-100000).
In a comparative example, the LLDPE of the use LLDPER901U that is Samsung of Korea S.
Embodiment 1
By antioxidant 1010: irgasfos 168: the part by weight of Zinic stearas=1:2:2 is mixed into processing aid; by metallocene linear low density polyethylene 74.4Kg; polyisobutene 10Kg; after processing aid 0.6Kg mixes, pigment manufactures particle in dual-screw pelletizer; processing parameter is temperature 200 DEG C; rotating speed 600rpm, head pressure 0.5MPa.
The particle 85Kg made and ultra-low density polyethylene 15Kg is mixed in mixing machine.Hybrid technique parameter is: rotating speed 5rpm, mixing time 10min.
Ground in plastic grinder by the particle mixed, processing parameter is rate of feeding 25Kg/h, speed of grinding plate 2000rpm, mill temperature out 50 DEG C.
Embodiment 2
By antioxidant 1010: irgasfos 168: the ratio of Zinic stearas=1:2:2 is mixed into processing aid; by metallocene linear low density polyethylene 92.8Kg; polyisobutene 2Kg; after processing aid 0.2Kg mixes, pigment manufactures particle in dual-screw pelletizer; processing parameter is temperature 150 DEG C; rotating speed 400rpm, head pressure 0.1MPa.
The particle 95Kg made and ultra-low density polyethylene 5Kg is mixed in mixing machine.Hybrid technique parameter is: rotating speed 30rpm, mixing time 3min.
Ground in plastic grinder by the particle mixed, processing parameter is rate of feeding 300Kg/h, speed of grinding plate 4000rpm, mill temperature out 65 DEG C.
Comparative example 1
LLDPE being carried out in plastic grinder processing parameter is rate of feeding 300Kg/h, speed of grinding plate 4000rpm, mill temperature out 65 DEG C.
Comparative example 2
By antioxidant 1010: irgasfos 168: the ratio of Zinic stearas=1:2:2 is mixed into processing aid; by metallocene linear low density polyethylene 92.8Kg; polyisobutene 2Kg; processing aid 0.2Kg manufactures particle after mixing in dual-screw pelletizer; processing parameter is temperature 150 DEG C; rotating speed 400rpm, head pressure 0.1MPa.
Ground in plastic grinder by the particle caused, processing parameter is rate of feeding 300Kg/h, speed of grinding plate 4000rpm, mill temperature out 65 DEG C.
Comparative example 3
LLDPE 95Kg and ultra-low density polyethylene 5Kg is mixed in mixing machine.Hybrid technique parameter is: rotating speed 30rpm, mixing time 3min.
Ground in plastic grinder by the particle mixed, processing parameter is rate of feeding 300Kg/h, speed of grinding plate 4000rpm, mill temperature out 65 DEG C.
By the obtained each 8Kg of material, add the Plastic Rolling Molds of urea box, oven temperature 260 DEG C, heat-up time 25min, speed of mainshaft 4rpm, countershaft rotating speed 5rpm, cooling time 30min processing condition under carry out rotational moulding, take out goods and compare, the results are shown in Table 1.
Table 1
Visual observation is passed through with the bonding situation of metal inserted piece.
Temperature tolerance is tested: the water (room temperature) adding 2/3 rated capacity in urea box goods, under 90 DEG C ± 2 DEG C envrionment temperatures, place 1h, after taking out, observe appearance change situation, measure the width of urea box both sides planar central, with original size contrast, calculate deflection.
Normal temperature shock strength and low temperature impact strength: urea box planar section is cut into 12.7 × 12.7mm print, test according to the requirement of U.S. rotational moulding association criterion Version4.0 " LowTemperatureImpactTest ".Takes out and test after print being placed 4h in (23 ± 2) DEG C environment during the test of normal temperature shock strength, take out after sample being placed 4h in the refrigerator of (-40 ± 2) DEG C when low temperature impact strength is tested and test.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (9)
1. a rotation molding urea box polythene material, it is characterized in that, be mixed by following component by mass percentage: metallocene linear low density polyethylene 74.4-92.8%, ultra-low density polyethylene 5-15%, polyisobutene 2-10%, processing aid 0.2-0.6%.
2. a kind of rotation molding urea box polythene material according to claim 1, it is characterized in that: described metallocene linear low density polyethylene, its density is 0.925-0.940g/cm
3, melt flow rate (MFR) 3-6g/10min, tensile strength 15-20MPa, Izod notched impact strength 20-50KJ/m
2.
3. a kind of rotation molding urea box polythene material according to claim 1 and 2, it is characterized in that: described ultra-low density polyethylene, its density is 0.870-0.910g/cm
3, melt flow rate (MFR) 1-6g/10min.
4. a kind of rotation molding urea box polythene material according to claim 1 and 2, is characterized in that: the viscosity-average molecular weight of described polyisobutene is 10000-100000.
5. a kind of rotation molding urea box polythene material according to claim 1 and 2, is characterized in that: described processing aid is by antioxidant 1010: irgasfos 168: the part by weight of Zinic stearas=1:2:2 mixes.
6. the preparation method of a kind of rotation molding urea box polythene material as claimed in claim 1, it is characterized in that, step is as follows:
A. metallocene linear low density polyethylene, polyisobutene and processing aid are dropped in dual-screw pelletizer by proportioning and make particle;
B. the particle of step a and ultra-low density polyethylene particle are mixed in proportion in medium speed mixer;
C. will mix after particle grinds in plastic grinder and obtain finished product.
7. preparation method according to claim 6, is characterized in that: the processing parameter of dual-screw pelletizer is: temperature 150-200 DEG C, rotating speed 400-600rpm, head pressure 0.1-0.5MPa.
8. preparation method according to claim 6, is characterized in that: the processing parameter of medium speed mixer mixing is: rotating speed 5-30rpm, mixing time 3-10min.
9. preparation method according to claim 6, is characterized in that: the processing parameter of plastic grinder is rate of feeding 25-300Kg/h, speed of grinding plate 2000-4000rpm, mill temperature out≤65 DEG C.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281003A (en) * | 1999-07-16 | 2001-01-24 | 三井化学株式会社 | Polyethylene resin composition used for rotational moulding and rotational moulded product made with said composition |
| CN104231408A (en) * | 2014-08-07 | 2014-12-24 | 浙江瑞堂塑料科技有限公司 | High-weather-resistant rotationally-moulded polyethylene material and preparation method thereof |
-
2015
- 2015-08-27 CN CN201510535991.8A patent/CN105131411B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1281003A (en) * | 1999-07-16 | 2001-01-24 | 三井化学株式会社 | Polyethylene resin composition used for rotational moulding and rotational moulded product made with said composition |
| CN104231408A (en) * | 2014-08-07 | 2014-12-24 | 浙江瑞堂塑料科技有限公司 | High-weather-resistant rotationally-moulded polyethylene material and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 傅旭 主编: "《化工产品手册 树脂与塑料》", 31 March 2005, 化学工业出版社 * |
| 周祥兴 主编: "《合成树脂新资料手册》", 31 May 2002, 中国物资出版社 * |
| 梁星宇 编著: "《丁基橡胶应用技术》", 31 May 2004, 化学工业出版社 * |
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