윤활유 조성물

• Main Authors: MONJIYAMA SHUNSUKE, KAWAMOTO HIDEKI, ODA KAZUHIRO
• Format: Patent
• Language: Korean
• Published: 24.06.2024
• Subjects: CHEMISTRY; FUELS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS; LUBRICANTS; LUBRICATING COMPOSITIONS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

(과제) 생분해성, 윤활성 (극압성), 산화 안정성, 항유화성이 우수하고, 수생 생물에 대한 독성 및 축적성이 낮고, 나아가서는 물 존재하에서도 전단 안정성이 우수한 윤활유 조성물을 제공한다. (해결 수단) 윤활유 조성물은, (A) 에스테르 화합물 100 질량부에 대해, (B) 산성 인산에스테르아민염을 0.1 ∼ 1.5 질량부, (C) 아민계 산화 방지제를 0.3 ∼ 2.0 질량부 및 (D) 페놀계 산화 방지제를 0.3 ∼ 2.0 질량부 함유한다. (A) : 펜타에리트리톨 유래의 구성 성분 (a) 의 몰 백분율이 20 ∼ 30 mol％ 이고, 탄소수 14 ∼ 22 의 직사슬 지방산 유래의 구성 성분 (b) 의 몰 백분율이 55 ∼ 79 mol％ 이고, 아디프산 유래의 구성 성분 (c) 의 몰 백분율이 1 ∼ 15 mol％ 인 에스테르 화합물로서, 구성 성분 (b) 의 몰 백분율과 (c) 의 몰 백분율의 비율 [(c) mol％/(b) mol％] 이 0.02 ∼ 0.25 이며, 수산기가가 10 ∼ 100 mgKOH/g 인 에스테르 화합물 (B) : 식 (1) 의 산성 인산에스테르아민염 TIFFpct00007.tif19106 (n 은 1 또는 2 의 정수이며, R' 는 탄소수 4 ∼ 6 의 직사슬 알킬기이며, R'' 는 수소 또는 탄소수 11 ∼ 14 의 알킬기이다.) [Object] The object is to provide a lubricant oil composition excellent in biodegradability, lubricating property (extreme pressure property), stability against oxidation and demulsibility, having low toxicity and bioaccumulation property in an aquatic life, and excellent in stability against shearing even in the presence of water.[Solution] A lubricant oil composition comprises 100 mass parts of the following ester compound (A), 0.1 to 1.5 mass parts of the following amine salt (B) of an acidic phosphoric acid ester, 0.3 to 2.0 mass parts of an amine-based oxidation preventing agent (C), and 0.3 to 2.0 mass parts of a phenol-based oxidation preventing agent (D),(A) the ester compound comprising a molar percentage of 20 to 30 mol% of a constituent component (a) derived from pentaerythritol, a molar percentage of 55 to 79 mol% of a constituent component (b) derived from a straight-chain fatty acid having a carbon number of 14 to 22, and a molar percentage of 1 to 15 mol% of a constituent component (c) derived from adipic acid, wherein a ratio [(c) mol%/(b) mol%] of the molar percentage of the constituent component (b) with respect to the molar percentage of the constituent component (c) is 0.02 to 0.25 and wherein the ester compound has a hydroxyl value of 10 to 100 mgKOH/g,(B) the amine salt of an acidic phosphoric acid ester represented by the following formula (1), (in the formula (1), n represents an integer of 1 or 2, R' represents a straight-chain alkyl group having a carbon number of 4 to 6, and R" represents hydrogen or an alkyl group having a carbon number of 11 to 14.).