Liquid addition-curing type fluorosilicone composition and fluorosilicone rubber
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SHIN ETSU CHEMICAL CO LTD
- Filing Date
- 2026-03-18
- Publication Date
- 2026-06-23
AI Technical Summary
【0009】 以上のように、本発明の液状付加硬化型フルオロシリコーン組成物は、比較的低温でも速やかに硬化するため硬化性が非常に良好でありながら保存安定性にも優れ、機械的強度が保持されるフルオロシリコーンゴムを与えることができる。また、この液状付加硬化型フルオロシリコーン組成物は、注入成形、圧縮成形及び射出成形などの生産性に優れた加工用の材料として好適であることから、成形品の生産性向上に寄与することができる。
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Abstract
Claims
1. A liquid addition-curing type fluorosilicone composition, (A) General formula (1) 【Chemistry 1】 (In the formula, R １ (The groups are independently selected from an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aralkyl group having 7 to 12 carbon atoms; Rf is independently selected from a perfluoroalkyl group having 1 to 10 carbon atoms, or a perfluoropolyether group having 3 to 30 carbon atoms; X is a divalent organic group; m is an integer from 0 to 100; and n is an integer from 1 to 800, where 5 ≤ m + n ≤ 800.) Alkenyl group-containing organopolysiloxanes having a viscosity of 100 to 500,000 mPa·s at 25°C, as shown by (B) General formula (2) 【Chemistry 2】 (In the above formula (2), R ４ Rf' is a group independently selected from an alkyl group having 1 to 8 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aralkyl group having 7 to 12 carbon atoms; Rf' is a group independently selected from a perfluoroalkyl group having 1 to 10 carbon atoms, or a perfluoropolyether group having 3 to 30 carbon atoms; and X is a divalent organic group. x1 is an integer between 3 ≤ x1 ≤ 5, x2 and x3 are integers between 0 ≤ x2 + x3 ≤ 20, y1 is an integer between 0 ≤ y1 ≤ 30, y2 is an integer between 0 ≤ y2 ≤ 30, z1 is an integer between 0 ≤ z1 ≤ 10, z2 is an integer between 0 ≤ z2 ≤ 10, and w is 0 < w ≤ 10, where x2, x3, y1, y2, z1 and z2 cannot be simultaneously 0. An organohydrogenpolysiloxane having 3 to 5 silicon atom-bonded hydrogen atoms in one molecule, as shown by: (B) an amount such that the number of hydrogen atoms bonded to the silicon atom in the component is 0.5 to 10 per silicon atom-bonded alkenyl group in the composition, (C) Addition reaction catalyst: amount of catalyst, and (D) Reinforcing silica filler surface-treated with an organosilicon compound represented by the following general formula (3) 【Transformation 3】 (In the above formula (3), R ３ These are groups independently selected from alkyl groups having 1 to 8 carbon atoms, aryl groups having 6 to 12 carbon atoms, or aralkyl groups having 7 to 12 carbon atoms, and R ２ These are, independently of each other, the above R ３ The group represented by , or the 3,3,3-trifluoropropyl group, however R ２ At least one of the groups is a 3,3,3-trifluoropropyl group, and p is an integer of 1 ≤ p ≤ 20): (A) 10 to 35 parts by mass per 100 parts by mass of component It contains, The reinforcing silica filler is, in proportion to 40 parts by mass of the reinforcing silica filler surface-treated with the organosilicon compound represented by the general formula (3), 1 to 6 parts by mass of the organosilicon compound represented by the general formula (3), 0.1 to 15 parts by mass of an organosilane and / or organosilazane other than the organosilicon compound represented by the general formula (3) An addition-curing fluorosilicone composition that is liquid at 23°C and is characterized by being surface-treated.
2. The addition-curing fluorosilicone composition according to claim 1, characterized in that the organosilazane is hexamethyldisilazane and / or 1,3-divinyl-1,1,3,3-tetramethyldisilazane.
3. A fluorosilicone rubber characterized by being a cured product of the addition-curing type fluorosilicone composition described in claim 1 or 2.