KR20230077301A - Rubber complex fender composition with chloroprene rubber for small ship - Google Patents
Rubber complex fender composition with chloroprene rubber for small ship Download PDFInfo
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Abstract
본 발명은 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물에 관한 것으로, 보다 구체적으로는 천연고무와 클로로프렌 고무를 복합화한 기재를 사용함으로써 기본 물성(경도, 인장강도 등)과 내구수명(내염수성, 내노화성 등)을 향상시킬 뿐만 아니라, 카본블랙의 사용량을 감소시키고 이를 경탄으로 대체함으로써 경량화를 구현하여 소형 선박용 방현재에 적합하게 사용될 수 있도록 하는, 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물에 관한 것이다.
본 발명은 산업통상자원부, 부산광역시, (재)부산테크노파크의 지원사업으로 “2021년 조선해양 경량,고성능 소재혁신 플랫폼 구축 사업화 지원 사업” 의 지원을 받아 수행된 연구결과입니다.The present invention relates to a rubber composite fender composition for small ships to which chloroprene rubber is applied, and more specifically, basic physical properties (hardness, tensile strength, etc.) and durability (salt water resistance, aging resistance, etc.) as well as reducing the amount of carbon black used and replacing it with hard coal to realize weight reduction so that it can be suitably used for small ship fenders, to a rubber composite fender composition for small ships using chloroprene rubber it's about
This invention is the result of research conducted with the support of the “2021 Shipbuilding & Marine Lightweight, High-Performance Material Innovation Platform Construction Support Project” as a support project of the Ministry of Trade, Industry and Energy, Busan Metropolitan City, and Busan Technopark.
Description
본 발명은 기본 물성(경도, 인장강도 등)과 내구수명(내염수성, 내노화성 등)을 향상시킬 뿐만 아니라, 경량화를 구현하여 소형 선박용 방현재에 적합하게 사용될 수 있도록 하는, 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물에 관한 것이다.The present invention not only improves basic physical properties (hardness, tensile strength, etc.) and durability (salt water resistance, aging resistance, etc.), but also implements light weight so that it can be suitable for use in small ship fenders. It relates to a rubber composite fender composition for ships.
일반적으로 방현재(Fender, 防舷材)는 선박을 부두에 접안하거나 다른 배의 옆에 정박할 경우 접촉에 의한 충격을 완화시켜 서로의 손상을 방지하기 위해 항만 및 선박 외부에 설치하는 완충재를 의미한다.In general, a fender refers to a buffer installed outside a port or ship to prevent damage to each other by mitigating the shock caused by contact when a ship is docked at a pier or anchored next to another ship. do.
이러한 방현재는 선박-부두 혹은 선박-선박 간의 충돌 등에 의한 선체 손상을 최소화 하여 주기 때문에 그 역할이 매우 중요하며 해양수산부에서는 급유선 둘레에 방현재 설치 의무화(기존 : 100톤 이상 → 개정 : 모든 선박)를 시행하고 있고, 일반 선박에도 확대 적용되는 추세이다.Since these fenders minimize hull damage caused by ship-pier or ship-ship collisions, their role is very important, and the Ministry of Maritime Affairs and Fisheries mandates the installation of fenders around fueling ships (previous: 100 tons or more → Revised: all ships) is being implemented, and it is being applied to general ships as well.
하지만, 소형 선박용 방현재는 통상 천연고무를 기재로 하되, 원가절감에 초점을 맞추어 개발하였기 때문에 기본 물성(경도, 인장강도 등)과 내구수명(내염수성, 내노화성 등)이 미흡한 실정이며, 이를 보완하기 위한 카본블랙의 대량 사용으로 상대적으로 고중량을 가지는 단점을 지니고 있다.However, fenders for small ships are usually made of natural rubber as a base material, but since they were developed with a focus on cost reduction, basic physical properties (hardness, tensile strength, etc.) and durability (saltwater resistance, aging resistance, etc.) are insufficient. It has a disadvantage of having a relatively high weight due to the large amount of carbon black used to compensate.
한편, 특허문헌 1 및 2 등에서와 같이, 방현재 설치 및 유지비용을 줄이기 위하여 폐 타이어를 설치하는 경우가 있는데, 이는 부분적인 방호성능 부재와 더불어 해양 폐기물로 해양 환경을 오염시키게 되고, 선박에 적용시 고중량에 의한 선박의 연료효율 감소 등을 발생시키는 문제점이 있었다.On the other hand, as in Patent Documents 1 and 2, there is a case where a waste tire is installed to reduce the cost of installing and maintaining a fender, which pollutes the marine environment with marine waste along with a partial absence of protective performance, and is applied to ships. There was a problem of causing a reduction in fuel efficiency of the ship due to the high weight at the time of use.
본 발명은 상기와 같은 문제점을 해결하기 위한 것으로, 천연고무와 클로로프렌 고무를 복합화한 기재를 사용함으로써 기본 물성(경도, 인장강도 등)과 내구수명(내염수성, 내노화성 등)을 향상시킬 뿐만 아니라, 카본블랙의 사용량을 감소시키고 이를 경탄으로 대체함으로써 경량화를 구현하여 소형 선박용 방현재에 적합하게 사용될 수 있도록 함을 과제로 한다.The present invention is to solve the above problems, by using a base material in which natural rubber and chloroprene rubber are combined, basic physical properties (hardness, tensile strength, etc.) and durability (salt water resistance, aging resistance, etc.) are improved, as well as , the task is to reduce the amount of carbon black used and replace it with hard coal so that it can be used suitably for small ship fenders by realizing weight reduction.
본 발명은 방현재 조성물에 있어서, 천연고무와 클로로프렌 고무(chloroprene rubber)의 혼합기재를 사용하는 것을 특징으로 하는, 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물을 과제의 해결 수단으로 한다.The present invention provides a rubber composite fender composition for small ships using chloroprene rubber, which is characterized by using a mixed base material of natural rubber and chloroprene rubber in the fender composition.
보다 구체적으로 상기 방현재 조성물은 천연고무 80 ~ 90 중량% 및 클로로프렌 고무 10 ~ 20 중량%로 이루어지는 기재 100 중량부에 대하여, 카본블랙(carbon black) 70 ~ 75 중량부, 경탄(CaCO3) 20 ~ 25 중량부, 파라핀(Paraffin)계 프로세스 오일(Process oil) 20 ~ 30 중량부, 광안정제 1 ~ 3 중량부, 산화방지제 2 ~ 4 중량부, 금속산화물 1 ~ 3 중량부, 가교제 1 ~ 3 중량부, 가교촉진제 1 ~ 5 중량부 및 스테아린산 0.5 ~ 1.5 중량부로 이루어지는 것이 바람직하다.More specifically, the fender composition contains 70 to 75 parts by weight of carbon black, 20 parts by weight of hard carbon (CaCO 3 ), based on 100 parts by weight of a substrate composed of 80 to 90% by weight of natural rubber and 10 to 20% by weight of chloroprene rubber. ~ 25 parts by weight, 20 to 30 parts by weight of paraffin-based process oil, 1 to 3 parts by weight of light stabilizer, 2 to 4 parts by weight of antioxidant, 1 to 3 parts by weight of metal oxide, 1 to 3 crosslinking agent It is preferably composed of 1 to 5 parts by weight of a crosslinking accelerator and 0.5 to 1.5 parts by weight of stearic acid.
본 발명은 기본 물성(경도, 인장강도 등)과 내구수명(내염수성, 내노화성 등)을 향상시킬 뿐만 아니라, 경량화를 구현하여 소형 선박용 방현재에 적합하게 사용될 수 있도록 하는 효과가 있다.The present invention not only improves basic physical properties (hardness, tensile strength, etc.) and durability (salt water resistance, aging resistance, etc.), but also has the effect of enabling it to be suitably used for small ship fenders by realizing weight reduction.
상기의 효과를 달성하기 위한 본 발명은 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물에 관한 것으로서, 본 발명의 기술적 구성을 이해하는데 필요한 부분만이 설명되며 그 이외 부분의 설명은 본 발명의 요지를 흩트리지 않도록 생략될 것이라는 것을 유의하여야 한다.The present invention for achieving the above effect relates to a rubber composite fender composition for small ships to which chloroprene rubber is applied. It should be noted that it will be omitted to avoid clutter.
이하, 본 발명에 따른 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물을 상세히 설명하면 다음과 같다.Hereinafter, a rubber composite fender composition for small ships to which the chloroprene rubber according to the present invention is applied will be described in detail.
본 발명에 따른 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물은 천연고무와 클로로프렌 고무(chloroprene rubber)의 혼합기재를 사용하는 것을 특징으로 하며, 보다 구체적으로는 천연고무 80 ~ 90 중량% 및 클로로프렌 고무 10 ~ 20 중량%로 이루어지는 기재 100 중량부에 대하여, 카본블랙(carbon black) 70 ~ 75 중량부, 경탄(CaCO3) 20 ~ 25 중량부, 파라핀(Paraffin)계 프로세스 오일(Process oil) 20 ~ 30 중량부, 광안정제 1 ~ 3 중량부, 산화방지제 2 ~ 4 중량부, 금속산화물 1 ~ 3 중량부, 가교제 1 ~ 3 중량부, 가교촉진제 1 ~ 5 중량부 및 스테아린산 0.5 ~ 1.5 중량부로 이루어지는 것을 특징으로 한다.The rubber composite fender composition for small ships to which chloroprene rubber according to the present invention is applied is characterized by using a mixture of natural rubber and chloroprene rubber, and more specifically, 80 to 90% by weight of natural rubber and chloroprene rubber 70 to 75 parts by weight of carbon black, 20 to 25 parts by weight of hard coal (CaCO 3 ), 20 to 20 parts by weight of paraffin-based process oil, based on 100 parts by weight of a substrate composed of 10 to 20% by weight 30 parts by weight, 1 to 3 parts by weight of a light stabilizer, 2 to 4 parts by weight of an antioxidant, 1 to 3 parts by weight of a metal oxide, 1 to 3 parts by weight of a crosslinking agent, 1 to 5 parts by weight of a crosslinking accelerator, and 0.5 to 1.5 parts by weight of stearic acid characterized by
상기 천연고무는 본 발명의 기본 기재이고 상기 클로로프렌 고무는 기본 물성과 내구수명 등을 향상시키기 위해 복합화되는 것으로 천연고무의 함량이 80 중량% 미만이고 클로로프렌 고무의 함량이 20 중량%를 초과할 경우 방현재 사용성이나 작업성 등이 저하될 우려가 있고, 천연고무의 함량이 90 중량%를 초과하고 클로로프렌 고무의 함량이 10 중량% 미만일 경우 내구수명 등의 향상효율이 저하될 우려가 있다.The natural rubber is the basic substrate of the present invention, and the chloroprene rubber is compounded to improve basic physical properties and durability, and when the content of natural rubber is less than 80% by weight and the content of chloroprene rubber exceeds 20% by weight, Currently, usability or workability may be deteriorated, and if the content of natural rubber exceeds 90% by weight and the content of chloroprene rubber is less than 10% by weight, there is a concern that improvement efficiency such as durability may decrease.
상기 카본블랙과 경탄은 방현재의 기본 물성 등을 향상시키기 위해 첨가되는 것으로 카본블랙과 경탄의 함량이 상기 범위를 벗어날 경우 기본 물성이 미비해지거나 또는 경량화 효율이 저하될 우려가 있다.The carbon black and hard coal are added to improve the basic physical properties of the fender, and if the content of carbon black and hard coal is out of the above range, there is a concern that the basic physical properties may be insufficient or the weight reduction efficiency may be reduced.
한편, 고무의 가공성 개선을 위한 파라핀(Paraffin)계 프로세스 오일(Process oil), 태양광에 의한 변색을 방지하기 위한 HALS(Hindered amide light stabilizer) 등의 광안정제, 고무의 물성 저하를 방지하기 위한 N-페닐-N'-이소프로필-p-페닐렌디아민(N-phenyl-N'-isopropyl-p-phenylenediamine), 4,4'-비스(알파,알파-디메틸벤질)디-페닐아민(4,4'-Bis(alpha,alpha- dimethylbenzyl)di -phenylamine), 중합 1,2-디하이드로-2,2,4-트리메틸 퀴놀린(polymerized 1,2-dihydro-2,2,4-trimethyl quinoline) 등의 산화방지제, 가교제나 가교촉진제의 반응성 향상을 위한 산화아연 등의 금속산화물, 가교를 위한 황 등의 가교제, 가교 촉진을 위한 메르캅토벤조티아졸(mercaptobenzothiazole), 디벤조티아졸디술피드(dibenzothiazolyl disulphide), 테트라메틸티우람모노설파이드(tetramethylthiurammonosulfide), 테트라메틸티우람디설파이드(tetramethylthiuramdisulfide) 등의 가교촉진제 및 가교속도 조절, 가공성 향상을 위한 스테아린산은 공지된 첨가제로써 반드시 상기 종류 및 함량 범위에 한정되는 것은 아니고 방현재의 사용환경이나 구현하고자 하는 물성 등에 따라 이미 공지된 다양한 첨가제 및 함량의 적용이 가능하다.On the other hand, paraffin-based process oil to improve processability of rubber, light stabilizers such as HALS (Hindered amide light stabilizer) to prevent discoloration by sunlight, and N to prevent deterioration of physical properties of rubber -Phenyl-N'-isopropyl-p-phenylenediamine (N-phenyl-N'-isopropyl-p-phenylenediamine), 4,4'-bis (alpha, alpha-dimethylbenzyl) di-phenylamine (4, 4'-Bis(alpha,alpha-dimethylbenzyl)di-phenylamine), polymerized 1,2-dihydro-2,2,4-trimethyl quinoline, etc. Antioxidants, metal oxides such as zinc oxide for improving the reactivity of crosslinking agents or crosslinking accelerators, crosslinking agents such as sulfur for crosslinking, mercaptobenzothiazole for crosslinking acceleration, dibenzothiazolyl disulphide ), crosslinking accelerators such as tetramethylthiurammonosulfide and tetramethylthiuramdisulfide, and crosslinking rate control and stearic acid for improving processability are known additives and are not necessarily limited to the above types and content ranges. Depending on the use environment of the fender or the physical properties to be implemented, various additives and contents that are already known can be applied.
이하, 본 발명을 아래 실시예에 의거하여 더욱 상세히 설명하지만, 본 발명이 실시예에 의해 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail based on the examples below, but the present invention is not limited by the examples.
1. 방현재 조성물의 제조1. Preparation of fender composition
(실시예 1)(Example 1)
천연고무 80 중량% 및 클로로프렌 고무 20 중량%로 이루어지는 기재 100 중량부에 대하여, 카본블랙 70 중량부(N330 40 중량부+ N550 30 중량부), 경탄(CaCO3) 20 중량부, 파라핀 오일 20 중량부, 광안정제(HALS) 1 중량부, 산화방지제(N-페닐-N'-이소프로필-p-페닐렌디아민) 2 중량부, 금속산화물(산화아연) 1 중량부, 가교제(황) 1 중량부, 가교촉진제(메르캅토벤조티아졸) 1 중량부 및 스테아린산 0.5 중량부를 니이더(Kneader) 및 롤밀(roll mill)을 이용하여 혼련 및 분산시켜 시트상으로 제조한 후, 이를 180±5℃의 금형에서 성형하여 제조하였다.70 parts by weight of carbon black (40 parts by weight of N330 + 30 parts by weight of N550), 20 parts by weight of hard coal (CaCO 3 ), 20 parts by weight of paraffin oil, based on 100 parts by weight of a substrate composed of 80% by weight of natural rubber and 20% by weight of chloroprene rubber part, light stabilizer (HALS) 1 part by weight, antioxidant (N-phenyl-N'-isopropyl-p-phenylenediamine) 2 parts by weight, metal oxide (zinc oxide) 1 part by weight, crosslinking agent (sulfur) 1 part by weight 1 part by weight of a crosslinking accelerator (mercaptobenzothiazole) and 0.5 part by weight of stearic acid were kneaded and dispersed using a kneader and a roll mill to form a sheet, which was heated at 180 ± 5 ° C. It was manufactured by molding in a mold.
(실시예 2)(Example 2)
천연고무 90 중량% 및 클로로프렌 고무 10 중량%로 이루어지는 기재 100 중량부에 대하여, 카본블랙 75 중량부(N330 40 중량부+ N550 35 중량부), 경탄(CaCO3) 25 중량부, 파라핀 오일 30 중량부, 광안정제(HALS) 3 중량부, 산화방지제(N-페닐-N'-이소프로필-p-페닐렌디아민) 4 중량부, 금속산화물(산화아연) 3 중량부, 가교제(황) 3 중량부, 가교촉진제(메르캅토벤조티아졸) 5 중량부 및 스테아린산 1.5 중량부를 니이더(Kneader) 및 롤밀(roll mill)을 이용하여 혼련 및 분산시켜 시트상으로 제조한 후, 이를 180±5℃의 금형에서 성형하여 제조하였다.75 parts by weight of carbon black (40 parts by weight of N330 + 35 parts by weight of N550), 25 parts by weight of hard coal (CaCO 3 ), 30 parts by weight of paraffin oil part, light stabilizer (HALS) 3 parts by weight, antioxidant (N-phenyl-N'-isopropyl-p-phenylenediamine) 4 parts by weight, metal oxide (zinc oxide) 3 parts by weight, crosslinking agent (sulfur) 3 parts by weight After kneading and dispersing 5 parts by weight of a crosslinking accelerator (mercaptobenzothiazole) and 1.5 parts by weight of stearic acid using a kneader and a roll mill to prepare a sheet, it is heated at 180 ± 5 ° C. It was manufactured by molding in a mold.
(비교예 1)(Comparative Example 1)
실시예 1과 동일하게 제조하되, 클로로프렌 고무를 사용하지 않고 천연고무 100 중량%를 사용하였고, 경탄을 사용하지 않고 카본블랙 90 중량부를 사용하였다.It was prepared in the same manner as in Example 1, but 100% by weight of natural rubber was used without using chloroprene rubber, and 90 parts by weight of carbon black was used without using hard coal.
(비교예 2)(Comparative Example 2)
실시예 2와 동일하게 제조하되, 클로로프렌 고무를 사용하지 않고 천연고무 100 중량%를 사용하였고, 경탄을 사용하지 않고 카본블랙 100 중량부를 사용하였다.It was prepared in the same manner as in Example 2, but 100% by weight of natural rubber was used without using chloroprene rubber, and 100 parts by weight of carbon black was used without using hard coal.
2. 방현재 조성물의 평가2. Evaluation of the fender composition
상기 실시예 및 비교예에 따른 방현재 조성물 시편에 대한 무게 감소율, 경도, 인장강도, 내염수성 및 내노화성을 아래와 같은 방법으로 측정하였으며, 그 결과는 아래 [표 1]과 같다.The weight loss rate, hardness, tensile strength, salt water resistance and aging resistance of the fender composition specimens according to the above Examples and Comparative Examples were measured in the following manner, and the results are shown in [Table 1] below.
(1) 무게 감소율(1) Weight reduction rate
KS M 6519(고무 제품 분석 방법)에 따라 비교예 비중 대비 실시예의 비중 감소율(%)을 측정하였다.According to KS M 6519 (rubber product analysis method), the specific gravity reduction rate (%) of the examples compared to the specific gravity of the comparative example was measured.
(2) 경도(2) hardness
KS M 6518(가황고무 물리 시험 방법)에 따라 Shore A type 경도계로 측정하였다.It was measured with a Shore A type hardness tester according to KS M 6518 (physical test method for vulcanized rubber).
(3) 인장강도(3) Tensile strength
KS M 6518(가황고무 물리 시험 방법)에 따라 아령형 3호의 시험편을 만능시험기(UTM, Zwick 모델 1435)를 이용하여 시험편이 끊어질 때 까지의 최대하중을 읽고 인장강도를 구하였다.According to KS M 6518 (physical test method for vulcanized rubber), the dumbbell-shaped No. 3 test piece was read using a universal testing machine (UTM, Zwick model 1435) to read the maximum load until the test piece broke, and the tensile strength was obtained.
(4) 내염수성시험(4) Salt water resistance test
KS M 6518(가황고무 물리 시험 방법)에 따라 5% NaCl 수용액에 상온, 24hrs 침지 후의 경도 및 인장강도의 변화를 측정하였다.According to KS M 6518 (physical test method for vulcanized rubber), changes in hardness and tensile strength after immersion in 5% NaCl aqueous solution at room temperature for 24 hrs were measured.
(5) 노화시험(5) aging test
KS M 6518(가황고무 물리 시험 방법)에 따라 공기가열 노화시험기를 이용하여 규정된 조건으로 강제 노화(70℃×22hrs 열 노화 시험)시킨 뒤 노화 후의 경도 및 인장강도의 변화를 측정하였다.In accordance with KS M 6518 (physical test method for vulcanized rubber), it was subjected to forced aging (70 ° C × 22 hrs heat aging test) under the prescribed conditions using an air heating aging tester, and then the changes in hardness and tensile strength after aging were measured.
상기 [표 1]에서와 같이 본 발명의 실시예는 비교예에 비하여 기본 물성(경도, 인장강도)과 내구수명(내염수성, 내노화성)이 우수할 뿐만 아니라 경량화를 구현함에 따라 소형 선박용 방현재에 적합하게 사용될 수 있음을 알 수 있다.As shown in [Table 1], the embodiment of the present invention has excellent basic physical properties (hardness, tensile strength) and durability (saltwater resistance, aging resistance) compared to the comparative example, as well as lightening the fender for small ships. It can be seen that it can be used suitably for.
상술한 바와 같이, 본 발명에 따른 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물은 상기의 바람직한 실시 예를 통해 설명하고, 그 우수성을 확인하였지만 해당 기술 분야의 당업자라면 하기의 특허 청구 범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음을 이해할 수 있을 것이다.As described above, the rubber composite fender composition for small ships using the chloroprene rubber according to the present invention has been described through the above preferred examples and its excellence has been confirmed, but those skilled in the art can find the present described in the claims below It will be understood that the present invention can be variously modified and changed without departing from the spirit and scope of the invention.
Claims (3)
천연고무와 클로로프렌 고무(chloroprene rubber)의 혼합기재를 사용하는 것을 특징으로 하는, 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물.
In the fender composition,
A rubber composite fender composition for small ships using chloroprene rubber, characterized in that it uses a mixture of natural rubber and chloroprene rubber.
상기 방현재 조성물은,
천연고무 80 ~ 90 중량% 및 클로로프렌 고무 10 ~ 20 중량%로 이루어지는 기재를 사용하는 것을 특징으로 하는, 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물.
According to claim 1,
The fender composition,
A rubber composite fender composition for small ships using chloroprene rubber, characterized by using a substrate composed of 80 to 90% by weight of natural rubber and 10 to 20% by weight of chloroprene rubber.
상기 방현재 조성물은,
천연고무 80 ~ 90 중량% 및 클로로프렌 고무 10 ~ 20 중량%로 이루어지는 기재 100 중량부에 대하여, 카본블랙(carbon black) 70 ~ 75 중량부, 경탄(CaCO3) 20 ~ 25 중량부, 파라핀(Paraffin)계 프로세스 오일(Process oil) 20 ~ 30 중량부, 광안정제 1 ~ 3 중량부, 산화방지제 2 ~ 4 중량부, 금속산화물 1 ~ 3 중량부, 가교제 1 ~ 3 중량부, 가교촉진제 1 ~ 5 중량부 및 스테아린산 0.5 ~ 1.5 중량부로 이루어지는 것을 특징으로 하는, 클로로프렌 고무를 적용한 소형 선박용 고무 복합 방현재 조성물.According to claim 1,
The fender composition,
70 to 75 parts by weight of carbon black, 20 to 25 parts by weight of hard coal (CaCO 3 ), paraffin (Paraffin )-based process oil 20 to 30 parts by weight, light stabilizer 1 to 3 parts by weight, antioxidant 2 to 4 parts by weight, metal oxide 1 to 3 parts by weight, crosslinking agent 1 to 3 parts by weight, crosslinking accelerator 1 to 5 A rubber composite fender composition for small ships using chloroprene rubber, characterized in that it consists of 0.5 to 1.5 parts by weight of stearic acid and 0.5 to 1.5 parts by weight.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100649105B1 (en) | 2006-08-24 | 2006-11-24 | 주식회사 혜인이엔씨 | Fender structure for installing alongside pier of harbors quay |
| KR200454901Y1 (en) | 2007-08-01 | 2011-08-04 | 김지현 | Shock-resistant fender |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100649105B1 (en) | 2006-08-24 | 2006-11-24 | 주식회사 혜인이엔씨 | Fender structure for installing alongside pier of harbors quay |
| KR200454901Y1 (en) | 2007-08-01 | 2011-08-04 | 김지현 | Shock-resistant fender |
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