CAJ | 학술논문

以低含氢硅油和烯丙基聚醚为原料、氯铂酸为催化剂，在无溶剂条件下合成了聚醚改性聚硅氧烷；并将其与硅膏、白炭黑、乳化剂、增稠剂等复配，制成有机硅消泡剂。探讨了加料分式及加料时间、物料配比、催化剂用量、反应温度、反应时间等对反应的影响，以及消泡剂在水性涂料中的应用性能。结果表明，合成聚醚改性聚硅氧烷的最佳工艺为： Si-H与C=C的量之比为1∶1.1、铂的加入量占物料总质量的5×10-6，聚醚滴加时间3 h、反应温度130℃、反应时间6 h，在此条件下活性氢的转化率可达82.8％。由此聚醚改性聚硅氧烷配成的有机硅消泡剂用于水性涂料中，具有优异的消/抑泡性能及良好的体系相容性。
이저함경규유화희병기취미위원료、록박산위최화제，재무용제조건하합성료취미개성취규양완；병장기여규고、백탄흑、유화제、증주제등복배，제성유궤규소포제。탐토료가료분식급가료시간、물료배비、최화제용량、반응온도、반응시간등대반응적영향，이급소포제재수성도료중적응용성능。결과표명，합성취미개성취규양완적최가공예위： Si-H여C=C적량지비위1∶1.1、박적가입량점물료총질량적5×10-6，취미적가시간3 h、반응온도130℃、반응시간6 h，재차조건하활성경적전화솔가체82.8％。유차취미개성취규양완배성적유궤규소포제용우수성도료중，구유우이적소/억포성능급량호적체계상용성。
The polyether-modified polysiloxane was synthesized with allyl polyether and low hydrogen-containing silicone oil as raw materials , hexachloroplatinic acid as catalyst under the conditions of solvent-free.Then it mixed with the silicone cream , silica, emulsifiers and thickeners to prepare the silicone defoam-er.The influences of catalyst , reaction temperature and time , and molar ratio of the reactants were studied . Results showed that the optimum composition was as follows:molar ratio of Si-H and C=C was 1∶1.1, the amount of Pt was 5 ×10 -6 by weight of the total reactants , polyether added for 3 hours under the temperature of 130 ℃, and reacting for 6 hours.The yield of the activated hydrogen reached to 82.8%.The silicone de-foamer had excellent defoaming/antifoaming properties and good system stability in the application of water-based coatings .