CN115894808B - Low-crystal-point plate-grade ABS material and preparation method thereof - Google Patents
Low-crystal-point plate-grade ABS material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title description 3
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 239000013078 crystal Substances 0.000 claims abstract description 19
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003292 glue Substances 0.000 claims abstract description 11
- 238000012662 bulk polymerization Methods 0.000 claims abstract description 7
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012986 chain transfer agent Substances 0.000 claims abstract description 6
- 239000003999 initiator Substances 0.000 claims abstract description 6
- 239000005064 Low cis polybutadiene Substances 0.000 claims abstract description 5
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 5
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 4
- 239000011737 fluorine Substances 0.000 claims abstract description 4
- 238000010094 polymer processing Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 6
- HSLFISVKRDQEBY-UHFFFAOYSA-N 1,1-bis(tert-butylperoxy)cyclohexane Chemical group CC(C)(C)OOC1(OOC(C)(C)C)CCCCC1 HSLFISVKRDQEBY-UHFFFAOYSA-N 0.000 claims description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical group 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 4
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical group CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 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
- 239000007788 liquid Substances 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 3
- 239000012752 auxiliary agent Substances 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 35
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 26
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 25
- 239000000047 product Substances 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Polymerisation Methods In General (AREA)
- Graft Or Block Polymers (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention relates to the technical field of polymer composite materials, and discloses a method for preparing a low-crystal-point plate-grade ABS material by a bulk method, which specifically comprises the following steps: s1: dissolving 8-9 parts by mass of low cis-polybutadiene rubber, 13-15 parts by mass of ethylbenzene, 50-60 parts by mass of styrene and 15-25 parts by mass of acrylonitrile, filtering by a filter screen, and preheating to obtain a primary glue solution; s2: respectively conveying the crude glue solution, the initiator, the chain transfer agent and the auxiliary agent to a four-stage reaction kettle for continuous bulk polymerization, wherein each stage reaction kettle is provided with three temperature areas; s3: the polymerized material enters a devolatilizer to perform first-stage devolatilization and second-stage devolatilization to obtain devolatilized material; s4: adding 4-6% of fluorine-containing polymer processing aid PPA into the devolatilized material, and granulating in an extruder to obtain the low-crystal point plate-grade ABS material. The obtained product has the characteristics of low gloss and low gel, and the base color is pure white, so that the ABS material is good in impact strength and tensile strength.
Description
Technical Field
The invention relates to the technical field of polymer composite materials, and discloses a preparation method of a low-crystal-point plate-grade ABS material.
Background
The ABS resin is a terpolymer of acrylonitrile-butadiene-styrene, has good impact resistance, high glossiness and processability, is widely applied to the fields of automobiles, household appliances, toys and the like, and is one of the most widely applied general polymer materials with the largest yield at present.
The plate-grade ABS resin is the ABS resin with the largest domestic consumption and higher technical content, but most of the plate-grade ABS resins depend on import. The development of the board-grade ABS series products is finished by a plurality of international ABS production factories, and a certain market is possessed. With the continuous development of high-end products in urban areas, attractive appearance is required besides excellent performance of the products, and the products prepared from the low-crystal-point plate-grade ABS material have good appearance.
In general, the thinner the ABS material plate is, the more obvious the crystal point is, so the problem of the crystal point directly restricts the application field of the plate-grade ABS resin. At present, the method for reducing the crystal points in the material mainly depends on the subsequent processing process, and is difficult to directly synthesize and prepare the low-crystal point plate-grade ABS material.
Disclosure of Invention
The invention is characterized in that a bulk polymerization method is utilized, and the content and the technological parameters of each component of raw materials are adjusted by selecting proper rubber, so that the low-crystal-point plate-grade ABS material is prepared.
In a first aspect, the invention provides a method for preparing a low-crystal-point plate-grade ABS material by a bulk method, which specifically comprises the following steps:
S1: dissolving 8-9 parts by mass of low cis-polybutadiene rubber, 13-15 parts by mass of ethylbenzene, 50-60 parts by mass of styrene and 15-25 parts by mass of acrylonitrile, filtering by a filter screen, and preheating to obtain a primary glue solution;
S2: mixing the primary glue solution obtained in the step S1 according to the following mass parts: 100 parts by mass of virgin rubber liquid, 0.5 to 1 part by mass of initiator, 0.5 to 1 part by mass of chain transfer agent, 0.5 to 1 part by mass of antioxidant and 1 to 3 parts by mass of silicone oil; conveying the uniformly mixed solution to a four-stage reaction kettle for continuous bulk polymerization, wherein each stage reaction kettle is provided with three temperature areas;
s3: the polymerized material enters a devolatilizer to perform first-stage devolatilization and second-stage devolatilization to obtain devolatilized material;
S4: adding 4-6% of fluorine-containing polymer processing aid PPA into the devolatilized material, and granulating in an extruder to obtain the low-crystal point plate-grade ABS material.
Preferably, in the step S2, the initiator is 1, 1-bis (tert-butylperoxy) cyclohexane, the chain transfer agent is n-dodecyl mercaptan, and the antioxidant is an antioxidant 168 or 1010.
Preferably, the low cis-polybutadiene rubber is one or a mixture of 55AE and 255T.
Preferably, the filter screen in the step S1 is 100-120 meshes, and the preheating temperature is 50-80 ℃.
Preferably, the temperatures of the upper, middle and lower three temperature areas of the fourth reaction kettle are 135-150 ℃, 145-155 ℃ and 150-160 ℃ respectively.
Preferably, the temperatures of the upper, middle and lower three temperature areas of the first, second and third reaction kettles in the four-stage reaction kettles are 95-130 ℃.
Preferably, in the step S3, the temperature of the first stage devolatilization is 180 ℃ to 220 ℃, and the temperature of the second stage devolatilization is 240 ℃ to 260 ℃, so as to reduce crosslinking in a manner of increasing the devolatilization temperature.
Preferably, in the step S4, the granulating is performed by a twin-screw extruder, and the twin-screw extruder has five temperature zones, and the temperature parameters of each temperature zone are as follows: 170-300 ℃ in the first-stage temperature zone, 170-270 ℃ in the second-stage temperature zone, 130-280 ℃ in the third-stage temperature zone, 170-270 ℃ in the fourth-stage temperature zone and 130-270 ℃ in the fifth-stage temperature zone; the screw extrusion revolution is not more than 140r/min.
Further, the low-crystal point plate-grade ABS material is pulled by a pull roll to form an ABS film, the heating temperature of the pull roll is 30-100 ℃, the gap at the outlet of a die head is 0.5-10 mm, the interval at the outermost side of the pull roll is 0.5-10 mm, the speed of the pull roll is not more than 45m/min, the air outlet angle of an air knife is not more than 70 degrees, and the air quantity pressure is not more than 2MPa.
A low-crystal-point plate-grade ABS resin prepared by the method according to the first aspect, wherein the melt index of the ABS material is 4-7 g/10min, the impact strength is 20-25 kJ/m, the tensile strength is 38-46 MPa, and the melt strength is more than or equal to 380Nm.
The invention has the beneficial effects that:
The low-crystal point plate-grade ABS material prepared by the method has the characteristics of low gloss and low gel, and the bottom color is pure white, is an ABS material with good impact strength and tensile strength, and can be widely applied to refrigerators, air conditioners and luggage.
Detailed Description
The present invention will be further described in detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent.
It should be noted that the present invention is not limited to the following examples. The methods are conventional methods unless otherwise specified. The starting materials are commercially available from the public unless otherwise specified.
Dissolving 55AE rubber, ethylbenzene, styrene and acrylonitrile at a certain temperature, filtering by a filter screen, and preheating to obtain a primary glue solution; the raw glue solution, an initiator, a chain transfer agent and other auxiliary agents are respectively conveyed to each reaction kettle for continuous bulk polymerization; and (3) after the polymerized material enters a first stage and a second stage for devolatilization, the polymerized material enters an extruder for granulation. The bulk ABS product was tested for melt index, impact strength, tensile strength and melt strength.
The prepared bulk ABS resin is extruded in a double-screw extruder to obtain an ABS melting sheet material, an ABS film is formed by traction of a traction roller, and the number of crystal points is measured by a crystal point scanner.
Examples
8.8 Percent (mass fraction, the same applies below) of 55AE rubber, 14 percent of ethylbenzene, 54.2 percent of styrene and 23 percent of acrylonitrile are dissolved at a certain temperature, filtered by a 120-mesh filter screen, and preheated at 75 ℃ to form a primary glue solution; delivering the crude glue solution and 0.5% of 1, 1-bis (tert-butylperoxy) cyclohexane, 0.5% of n-dodecyl mercaptan, 0.5% of antioxidant 168 and 1% of silicone oil to a four-stage reaction kettle for continuous bulk polymerization, wherein the temperatures of the upper, middle and lower three temperature areas of the first, second and third reaction kettles in the four-stage reaction kettle are 95-130 ℃, and the temperatures of the upper, middle and lower three temperature areas of the fourth reaction kettle are 146 ℃, 150 ℃ and 159 ℃ respectively; after the polymerized material enters a first-stage devolatilization and a second-stage devolatilization, the temperature of a first-stage devolatilizer is 195 ℃, the temperature of a second-stage devolatilizer is 245 ℃, and the polymerized material enters an extruder for granulation. The prepared ABS resin is extruded in a double-screw extruder to obtain an ABS melting flaky material, wherein the double-screw extruder has five sections of temperature zones, and the temperature parameters of each section of temperature zone are as follows: the temperature of the first-stage temperature zone is 200 ℃, the temperature of the second-stage temperature zone is 230 ℃, the temperature of the third-stage temperature zone is 250 ℃, the temperature of the fourth-stage temperature zone is 260 ℃, the temperature of the fifth-stage temperature zone is 270 ℃, the screw extrusion revolution is 120r/min, and the fluoropolymer processing aid PPA accounting for 5% of the mass of the devolatilized materials is added in the melt extrusion process; the ABS film is formed by dragging an ABS melting flaky material through a traction roller, wherein the heating temperature of the traction roller is 370 ℃, the gap of an outlet of a die head is 55mm, the outermost interval of the traction roller is 5mm, the speed of the traction roller is 45m/min, the air outlet angle of an air knife is 70 degrees, the air volume pressure is 2MPa, and the number of points of ABS Bao Mojing is measured by a crystal point scanner.
Comparative example
8.8 Percent (mass fraction, the same applies below) of 55AE rubber, 14 percent of ethylbenzene, 59.2 percent of styrene and 18 percent of acrylonitrile are dissolved at a certain temperature, filtered by a 120-mesh filter screen, and preheated at 75 ℃ to form a primary glue solution; delivering 0.5% of 1, 1-bis (tert-butylperoxy) cyclohexane, 0.5% of n-dodecyl mercaptan, 0.5% of antioxidant 168 and 1% of silicone oil into a four-stage reaction kettle respectively for continuous bulk polymerization, wherein the temperatures of the upper, middle and lower three temperature areas of the first, second and third reaction kettles in the four-stage reaction kettle are 95-130 ℃, and the temperatures of the upper, middle and lower three temperature areas of the fourth reaction kettle are 151 ℃, 160 ℃ and 169 ℃ respectively; after the polymerized material enters a first-stage devolatilization and a second-stage devolatilization, wherein the temperature of a first-stage devolatilization device is 185 ℃, the temperature of a second-stage devolatilization device is 235 ℃, and then the polymerized material enters an extruder to be granulated to prepare ABS resin, and the ABS resin is extruded in a double-screw extruder to obtain ABS melting flaky material, wherein the double-screw extruder has five sections of temperature areas, and the temperature parameters of each section of temperature area are as follows: the first temperature zone is 200 ℃, the second temperature zone is 230 ℃, the third temperature zone is 250 ℃, the fourth temperature zone is 260 ℃, the fifth temperature zone is 270 ℃, and the screw extrusion revolution is 120r/min; the ABS film is formed by dragging an ABS melting flaky material through a traction roller, wherein the heating temperature of the traction roller is 370 ℃, the gap of an outlet of a die head is 55mm, the outermost interval of the traction roller is 5mm, the speed of the traction roller is 45m/min, the air outlet angle of an air knife is 70 degrees, the air volume pressure is 2MPa, and the number of points of ABS Bao Mojing is measured by a crystal point scanner.
Test effect
Melt index (g/10 min), impact strength (kJ/m), tensile strength (MPa), melt strength (Nm) and number of crystal points were measured for each of examples and comparative examples, and the results are shown in Table 1:
Table 1 test results for examples, comparative examples
According to the test results, the method has the advantages that the number of crystal points of the product can be obviously reduced, and meanwhile, the melt strength of the product is increased, so that the low-crystal point plate-grade ABS material is obtained by changing the technological parameters such as monomer content, polymerization temperature, devolatilization temperature and the like and adding the fluorine-containing polymer processing aid PPA in the process of preparing the film by melt extrusion.
Claims (6)
1. The method for preparing the low-crystal-point plate-grade ABS material by the bulk method is characterized by comprising the following steps of:
S1: 8 to 9 parts by mass of low cis-polybutadiene rubber, 13 to 15 parts by mass of ethylbenzene, 50 to 60 parts by mass of styrene and 15 to 25 parts by mass of acrylonitrile are dissolved, filtered by a filter screen, and preheated to 50 to 80 ℃ to form a primary glue solution;
S2: mixing the primary glue solution obtained in the step S1 according to the following mass parts: 100 parts by mass of virgin rubber liquid, 0.5 to 1 part by mass of initiator, 0.5 to 1 part by mass of chain transfer agent, 0.5 to 1 part by mass of antioxidant and 1 to 3 parts by mass of silicone oil; conveying the uniformly mixed solution to a four-stage reaction kettle for continuous bulk polymerization, wherein each stage reaction kettle is provided with three temperature areas; the temperatures of the upper, middle and lower three temperature areas of the first, second and third reaction kettles in the four-stage reaction kettles are 95-130 ℃, and the temperatures of the upper, middle and lower three temperature areas of the fourth reaction kettles are 135-150 ℃, 145-155 ℃ and 150-160 ℃ respectively;
s3: the polymerized material enters a devolatilizer to perform first-stage devolatilization and second-stage devolatilization to obtain devolatilized material; the temperature of the first-stage devolatilization is 180-220 ℃, and the temperature of the second-stage devolatilization is 240-260 ℃;
S4: adding 4-6% of fluorine-containing polymer processing aid PPA (polyether-amine) in the devolatilized materials, and granulating in an extruder to obtain a low-crystal-point plate-grade ABS material; granulating by a double-screw extruder, wherein the double-screw extruder has five sections of temperature zones, and the temperature parameters of each section of temperature zone are as follows: 170-300 ℃ in the first-stage temperature zone, 170-270 ℃ in the second-stage temperature zone, 130-280 ℃ in the third-stage temperature zone, 170-270 ℃ in the fourth-stage temperature zone and 130-270 ℃ in the fifth-stage temperature zone; the screw extrusion revolution is not more than 140r/min.
2. The method for preparing the low-crystal-point plate-grade ABS material by the bulk method according to claim 1, wherein the initiator is 1, 1-bis (tert-butylperoxy) cyclohexane, the chain transfer agent is n-dodecyl mercaptan, and the antioxidant is antioxidant 168 or 1010.
3. The method for preparing a low crystal point sheet grade ABS material according to claim 1 wherein the low cis polybutadiene rubber is one or a mixture of 55AE and 255T.
4. The method for preparing low-crystal point plate-grade ABS material by using the bulk method according to claim 1, wherein the filter screen in the step S1 is 100-120 meshes.
5. The method for preparing the low-crystal point plate-grade ABS material by the bulk method according to any one of claims 1 to 4, wherein the low-crystal point plate-grade ABS material is pulled by a pulling roll to form an ABS film, the heating temperature of the pulling roll is 30 to 100 ℃, the outlet gap of a die head is 0.5 to 10mm, the outermost interval of the pulling roll is 0.5 to 10mm, the pulling roll speed is not more than 45m/min, the air outlet angle of an air knife is not more than 70 degrees, and the air volume pressure is not more than 2MPa.
6. The ABS material prepared according to any one of claims 1 to 5 wherein the ABS material has a melt index of 4 to 7g/10min, an impact strength of 20 to 25kJ/m, a tensile strength of 38 to 46MPa and a melt strength of not less than 380Nm.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR8700753A (en) * | 1986-02-19 | 1987-12-15 | Goodyear Tire & Rubber | PROCESS FOR BULK BUTADIENE POLYMERIZATION |
| CN106046589A (en) * | 2016-08-18 | 2016-10-26 | 上海锦湖日丽塑料有限公司 | High-rigidity, high-melt-strength and low-temperature-impact-resistant thermo-plastic ABS resin composition used for blow molding |
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| US7402625B2 (en) * | 2003-06-11 | 2008-07-22 | 3M Innovative Properties Company | Compositions and method for improving the processing of polymer composites |
| CN1274757C (en) * | 2004-03-24 | 2006-09-13 | 中国石油天然气股份有限公司 | Low-gloss easy-to-process thermoplastic resin composition and extrusion processing method |
| US20100311920A1 (en) * | 2005-08-26 | 2010-12-09 | Cid Centro De Investigacion Y Desarrollo Tecnologico Sa De Cv | Using Reactive Block Copolymers as Chain Extenders and Surface Modifiers |
| JP2011162657A (en) * | 2010-02-09 | 2011-08-25 | Kaneka Corp | Vinyl polymer having epoxy group at terminal and process for producing the same |
| CN106947172B (en) * | 2017-04-09 | 2020-07-24 | 北京化工大学 | Fluoropolymer, preparation method and application |
| CN108299601B (en) * | 2017-12-12 | 2021-04-06 | 北方华锦化学工业股份有限公司 | Continuous bulk method for preparing high-fluidity and high-impact-resistance ABS (acrylonitrile-butadiene-styrene) resin |
| JP7049152B2 (en) * | 2018-03-29 | 2022-04-06 | 株式会社カネカ | Epoxy resin composition for paints |
| CN109467871A (en) * | 2018-10-29 | 2019-03-15 | 北方华锦化学工业股份有限公司 | A method of plating ABS resin is prepared using continuous bulk |
| CN110240778A (en) * | 2019-06-27 | 2019-09-17 | 北方华锦化学工业股份有限公司 | A kind of preparation method of ontology ABS resin |
| CN113583186A (en) * | 2021-09-09 | 2021-11-02 | 科元控股集团有限公司 | Production method of continuous bulk ABS resin |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR8700753A (en) * | 1986-02-19 | 1987-12-15 | Goodyear Tire & Rubber | PROCESS FOR BULK BUTADIENE POLYMERIZATION |
| CN106046589A (en) * | 2016-08-18 | 2016-10-26 | 上海锦湖日丽塑料有限公司 | High-rigidity, high-melt-strength and low-temperature-impact-resistant thermo-plastic ABS resin composition used for blow molding |
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