The present invention provides a polypropylene composition for a buoy sheet, comprising: 20 to 80 parts by weight of a polypropylene resin with a melting point of 160 to 165℃ and a density of 0.895 to 0.920 g/cm^3; and 80 to 20 parts by weight of a propylene-containing copolymer resin with a melting point of 110℃ or less and a density of 0.852 to 0.872 g/cm^3. The propylene-containing copolymer resin is a propylene-ethylene copolymer and preferably has an ethylene content of 10 wt% or less and a glass transition temperature (Tg) of -20℃ or less. The polypropylene composition for the buoy sheet may further contain 0.1 to 1 part by weight of a UV stabilizer, 0.2 to 0.8 part by weight of a UV blocker, and 0.01 to 2 parts by weight of a pigment. Random copolymers, homo copolymers, and block copolymers all can be used as the polypropylene resin. Instead of the propylene-containing copolymer resin, polypropylene and a resin having good compatibility can be used. The resin may be EPDM rubber, SEBS rubber, and SBS rubber.

    본 발명은 용융점이 160∼165℃이고 밀도가 0.895∼0.920g/cm3인 폴리프로필렌 수지 20∼80중량부 및 용융점이 110℃ 이하이고 밀도가 0.852∼0.872g/cm3인 프로필렌-함유 공중합체 수지 80∼20중량부를 포함하는 부표 시이트용 폴리프로필렌 조성물을 개시한다. 상기 프로필렌-함유 공중합체 수지는 프로필렌-에틸렌 공중합체로서, 에틸렌 함량이 10중량% 이하이고, 유리 전이 온도(Tg)가 -20℃ 이하인 것이 바람직하다. 상기 부표 시트용 폴리프로필렌 조성물은 UV 안정제 0.1∼1중량부, UV 차단제 0.2∼0.8중량부, 안료 0.01∼2중량부를 더 포함할 수 있다. 상기 폴리프로필렌 수지로는 랜덤 공중합체, 호모 공중합체, 블록 공중합체가 모두 사용가능하다. 상기 프로필렌-함유 공중합체 수지 대신에 폴리프로필렌과 상용성이 좋은 수지가 사용될 수 있다. 이러한 수지로는 EPDM 고무, SEBS 고무, SBS 고무 등이 있다.


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    Title :

    Polypropylene Composition for Sheet for Buoy Sheet for Buoy Prepared with the Composition and Buoy Prepared with the Sheet


    Additional title:

    부표 시트용 폴리프로필렌 조성물, 상기 조성물로 제조된 부표용 시트, 및 상기 시트로 제조된 부표


    Contributors:

    Publication date :

    2023-10-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / A01K ANIMAL HUSBANDRY , Tierzucht / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS



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