KR100257966B1 - 공기입 타이어의 트레드용 고무 조성물 - Google Patents
공기입 타이어의 트레드용 고무 조성물 Download PDFInfo
- Publication number
- KR100257966B1 KR100257966B1 KR1019970068156A KR19970068156A KR100257966B1 KR 100257966 B1 KR100257966 B1 KR 100257966B1 KR 1019970068156 A KR1019970068156 A KR 1019970068156A KR 19970068156 A KR19970068156 A KR 19970068156A KR 100257966 B1 KR100257966 B1 KR 100257966B1
- Authority
- KR
- South Korea
- Prior art keywords
- rubber
- resin
- weight
- parts
- modulus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 67
- 239000005060 rubber Substances 0.000 title claims abstract description 67
- 239000000203 mixture Substances 0.000 title claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 70
- 239000011347 resin Substances 0.000 claims abstract description 70
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 30
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229930003836 cresol Natural products 0.000 claims abstract description 10
- 239000006229 carbon black Substances 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 244000043261 Hevea brasiliensis Species 0.000 claims description 7
- 229920003052 natural elastomer Polymers 0.000 claims description 7
- 229920001194 natural rubber Polymers 0.000 claims description 7
- 229920002857 polybutadiene Polymers 0.000 claims description 7
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 34
- 239000003921 oil Substances 0.000 description 13
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 9
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 8
- BNCADMBVWNPPIZ-UHFFFAOYSA-N 2-n,2-n,4-n,4-n,6-n,6-n-hexakis(methoxymethyl)-1,3,5-triazine-2,4,6-triamine Chemical compound COCN(COC)C1=NC(N(COC)COC)=NC(N(COC)COC)=N1 BNCADMBVWNPPIZ-UHFFFAOYSA-N 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 239000003431 cross linking reagent Substances 0.000 description 6
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 6
- 239000012190 activator Substances 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 5
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000003755 preservative agent Substances 0.000 description 4
- 230000002335 preservative effect Effects 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000012763 reinforcing filler Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 150000003505 terpenes Chemical class 0.000 description 3
- 235000007586 terpenes Nutrition 0.000 description 3
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- 241001313207 Gonepteryx rhamni Species 0.000 description 2
- 239000013032 Hydrocarbon resin Substances 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229920006272 aromatic hydrocarbon resin Polymers 0.000 description 2
- 229920006270 hydrocarbon resin Polymers 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- 239000012803 melt mixture Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000010734 process oil Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- WTARULDDTDQWMU-RKDXNWHRSA-N (+)-β-pinene Chemical compound C1[C@H]2C(C)(C)[C@@H]1CCC2=C WTARULDDTDQWMU-RKDXNWHRSA-N 0.000 description 1
- WTARULDDTDQWMU-IUCAKERBSA-N (-)-Nopinene Natural products C1[C@@H]2C(C)(C)[C@H]1CCC2=C WTARULDDTDQWMU-IUCAKERBSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 244000226021 Anacardium occidentale Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WTARULDDTDQWMU-UHFFFAOYSA-N Pseudopinene Natural products C1C2C(C)(C)C1CCC2=C WTARULDDTDQWMU-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 229920006271 aliphatic hydrocarbon resin Polymers 0.000 description 1
- XCPQUQHBVVXMRQ-UHFFFAOYSA-N alpha-Fenchene Natural products C1CC2C(=C)CC1C2(C)C XCPQUQHBVVXMRQ-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229930006722 beta-pinene Natural products 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- LCWMKIHBLJLORW-UHFFFAOYSA-N gamma-carene Natural products C1CC(=C)CC2C(C)(C)C21 LCWMKIHBLJLORW-UHFFFAOYSA-N 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- RCHKEJKUUXXBSM-UHFFFAOYSA-N n-benzyl-2-(3-formylindol-1-yl)acetamide Chemical compound C12=CC=CC=C2C(C=O)=CN1CC(=O)NCC1=CC=CC=C1 RCHKEJKUUXXBSM-UHFFFAOYSA-N 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920003987 resole Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000011787 zinc oxide Substances 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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
-
- 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
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- 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
-
- 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
Landscapes
- 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)
- Tires In General (AREA)
Abstract
Description
천연수지 | 로진 | 검, 토올유, 우드 로진 |
변성 로진 | 하이-로진 | |
테르펜 | α,β-피넨 | |
합성수지 | 석유계 | 방향족 C9 수지 |
지방족 C5 수지 | ||
석탄계 | 방향족 C9 수지 | |
페놀계 | 레졸계 | |
노볼락계 | ||
기타 변성 수지 |
실시예 1 | 실시예 2 | 실시예 3 | 실시예 4 | 실시예 5 | 비교예 1 | 비교예 2 | |
천연고무 | 100 | 100 | 70 | 100 | 100 | ||
스티렌-부타디엔 공중합 고무 | 100 | 70 | 40 | ||||
폴리부타디엔 고무 | 30 | 30 | 5 | ||||
카본블랙 | 40 | 40 | 40 | 40 | 40 | 40 | 6 |
가공유 | 5 | 5 | 5 | 5 | 5 | 5 | 4 |
활성제 | 6 | 6 | 6 | 6 | 6 | 6 | |
노방제 | 4 | 4 | 4 | 4 | 4 | 4 | |
수지 1 | |||||||
수지 2 | |||||||
수지 3 | |||||||
수지 4 | 2.5 | ||||||
RF-수지 | 5 | 10 | 5 | 5 | 5 | 15 | 1 |
유황 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 0.5 |
촉진제 | 1 | 1 | 1 | 1 | 1 | 1 | |
지연제 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | |
HMMM |
비교예 3 | 비교예 4 | 비교예 5 | 비교예 6 | 비교예 7 | 비교예 8 | 비교예 9 | 비교예 10 | |
천연고무 | 100 | 100 | 100 | 100 | 100 | 70 | ||
스티렌-부타디엔 공중합 고무 | 100 | 70 | ||||||
폴리부타디엔 고무 | 30 | 30 | ||||||
카본블랙 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
가공유 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
활성제 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
노방제 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
수지 1 | 5 | |||||||
수지 2 | 5 | |||||||
수지 3 | 5 | |||||||
수지 4 | 5 | |||||||
RF-수지 | 5 | |||||||
유황 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
촉진제 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
지연제 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
HMMM | 3 |
실시예 1 | 실시예 2 | 실시예 3 | 실시예 4 | 실시예 5 | 비교예 1 | 비교예 2 | ||
모듈러스 | 10%M | 6.5 | 8.3 | 6 | 5.6 | 5.3 | 9.9 | 4.4 |
20%M | 9.6 | 11.6 | 9 | 8.4 | 7.9 | 13.6 | 7.5 | |
30%M | 12.3 | 15.0 | 11.9 | 11.3 | 10.7 | 17.8 | 10 | |
50%M | 17.1 | 21.8 | 16.1 | 15.6 | 15 | 26.1 | 13.7 | |
100%M | 28.3 | 32.1 | 27.3 | 26.2 | 25.2 | 38.6 | 23 | |
G"(×108) | 0℃ | 0.3135 | 0.2951 | 0.2956 | 0.3342 | 0.3108 | 0.2569 | 0.1867 |
20℃ | 0.2371 | 0.2035 | 0.2184 | 0.2621 | 0.239 | 0.1895 | 0.1206 | |
40℃ | 0.1933 | 0.1721 | 0.1753 | 0.2119 | 0.2052 | 0.1456 | 0.08564 | |
60℃ | 0.1883 | 0.1596 | 0.1673 | 0.2079 | 0.1934 | 0.1182 | 0.07452 | |
80℃ | 0.1769 | 0.1366 | 0.1587 | 0.1956 | 0.1791 | 0.0985 | 0.06305 | |
100℃ | 0.1682 | 0.1125 | 0.1486 | 0.1834 | 0.1599 | 0.08931 | 0.0546 |
비교예 3 | 비교예 4 | 비교예 5 | 비교예 6 | 비교예 7 | 비교예8 | 비교예 9 | 비교예10 | ||
모듈러스 | 10%M | 4.5 | 4.6 | 4.6 | 4.1 | 8.9 | 3.2 | 3.0 | 2.8 |
20%M | 7.4 | 7.4 | 7.4 | 6.8 | 11.1 | 5.9 | 5.5 | 5.3 | |
30%M | 9.6 | 9.7 | 9.7 | 8.7 | 14.3 | 8.6 | 8.1 | 7.6 | |
50%M | 12.6 | 12.4 | 12.3 | 11.6 | 21.2 | 10 | 9.3 | 8.3 | |
100%M | 21 | 21.6 | 21.5 | 19.6 | 33.7 | 19 | 17.8 | 16.3 | |
G"(×108) | 0℃ | 0.1978 | 0.2582 | 0.2321 | 0.2296 | 0.2296 | 0.1795 | 0.2432 | 0.2321 |
20℃ | 0.1257 | 0.179 | 0.1571 | 0.1501 | 0.1349 | 0.1131 | 0.1916 | 0.1617 | |
40℃ | 0.08967 | 0.1351 | 0.1164 | 0.1098 | 0.0864 | 0.08723 | 0.1514 | 0.1268 | |
60℃ | 0.07498 | 0.116 | 0.1035 | 0.0953 | 0.07352 | 0.07323 | 0.1366 | 0.1129 | |
80℃ | 0.06092 | 0.0955 | 0.08718 | 0.0828 | 0.0651 | 0.06235 | 0.1255 | 0.09716 | |
100℃ | 0.05162 | 0.07991 | 0.07647 | 0.07132 | 0.05213 | 0.05133 | 0.09891 | 0.08643 |
Claims (1)
- 천연고무 또는 스티렌-부타디엔 공중합 고무 50 내지 100 중량부와 폴리부타디엔 고무 0 내지 50 중량부를 혼합하여 이루어지는 전체 고무 성분 100 중량부에 대하여, 하기 화학식 1의 구조를 지닌 크레졸 타입의 알킬페놀포름알데하이드 수지 0.1 내지 10 중량부, 질소흡착 비표면적이 90 내지 130㎡/g이고, DBP 흡유량이 100 내지 160㎖/100g인 카본 블랙 30 내지 60 중량부 및 통상의 공기입 타이어의 트레드용 고무 조성물에 사용되는 첨가제로 이루어지는 것을 특징으로 하는 공기입 타이어의 트레드용 고무 조성물.화학식 1상기에서, n은 2 내지 5의 정수이고, R은 OH 또는 CH3이다.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970068156A KR100257966B1 (ko) | 1997-12-12 | 1997-12-12 | 공기입 타이어의 트레드용 고무 조성물 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970068156A KR100257966B1 (ko) | 1997-12-12 | 1997-12-12 | 공기입 타이어의 트레드용 고무 조성물 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR19990049250A KR19990049250A (ko) | 1999-07-05 |
KR100257966B1 true KR100257966B1 (ko) | 2000-06-01 |
Family
ID=19527143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019970068156A Expired - Fee Related KR100257966B1 (ko) | 1997-12-12 | 1997-12-12 | 공기입 타이어의 트레드용 고무 조성물 |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100257966B1 (ko) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57119938A (en) * | 1981-01-19 | 1982-07-26 | Yokohama Rubber Co Ltd:The | Rubber composition and preparation of same |
-
1997
- 1997-12-12 KR KR1019970068156A patent/KR100257966B1/ko not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57119938A (en) * | 1981-01-19 | 1982-07-26 | Yokohama Rubber Co Ltd:The | Rubber composition and preparation of same |
Also Published As
Publication number | Publication date |
---|---|
KR19990049250A (ko) | 1999-07-05 |
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