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  • 中文名稱:A-173乙烯基三異丙氧基硅烷
  • CAS RN:18023-33-1
  • EINECS號:
  • 分 子 式:C11H24O3Si
  • 分 子 量:232.392
  • 分子式:
物性數(shù)據(jù) 性狀 無色或淺黃色透明液體,≤20黑曾
純度 ≥98.0%
密度(25℃) 0.860~0.867g/mL
沸點(760mmHg) 180℃
閉杯閃點 93℃
折光率(25℃) 1.43
粘度(25℃、mPa·s) 0.99~1.00
溶解性
存儲方法: 低溫、通風(fēng)、干燥室內(nèi)避光密封保存。
??? 性: B-180是用于交聯(lián)乙烯基和丙烯酸乳液的乙烯基硅烷單體,可用于OEM產(chǎn)品和建筑涂料,該硅烷很容易共聚入乙烯基和丙烯酸乳液的主鏈,使用含有推薦催化劑的配方在固化后可獲得堅硬和高度交聯(lián)的涂層。該硅烷的獨特結(jié)構(gòu)使它在水性體系具有非常好的穩(wěn)定性,在涂料凝聚前不會反應(yīng)或交聯(lián),含有B-180的水性涂料配方在一年的老化之后仍保持穩(wěn)定性和有效性。
主要作用: 一般入量為0.2~15%的B-180到乳液樹脂的主鏈上可顯著地改善固化后涂層的性能,主要有:耐溶劑性,耐水性,防劃傷性,濕態(tài)和干態(tài)附著力,涂膜的硬度,拉伸強度。
與171、570對比優(yōu)勢
1 加入時間的優(yōu)勢:171、570的加入時間,一般為反應(yīng)后期滴加單體剩下10%左右時加入,否則容易掛壁;而B-180沒有這樣的要求,可以在反應(yīng)的任何階段添加;
2 反應(yīng)溫度的優(yōu)勢:171、570的反應(yīng)溫度一般控制在75~80℃,而且要配合相應(yīng)的引發(fā)劑,否則反應(yīng)會不充分,或是出現(xiàn)嚴(yán)重掛壁現(xiàn)象;而B-180的反應(yīng)溫度可以提高到85~90℃,更有利于單體聚合;
3 加入量的優(yōu)勢:171、570的加入不宜過大,否則會水解自聚,難以控制,最高添加量一般只有百分之幾,而B-180的添加量,可以是從0.1~16%;
4 性能上的優(yōu)勢:要比同樣添加量的171、570的耐水效果好,而且添加量越大,優(yōu)勢越明顯。
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