KR20210084331A - Carbosilane Photocurable Composition and Manufacturing method of the Same - Google Patents
Carbosilane Photocurable Composition and Manufacturing method of the Same Download PDFInfo
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Abstract
Description
본 발명은 카보실란계 광경화성 조성물에 관한 것으로, 구체적으로는 액상 또는 용융 상태의 폴리카보실란을 작용기를 함유하는 모노실란과 혼합하여 광경화 특성을 나타낼 수 있는 카보실란계 조성물에 관한 것이다.The present invention relates to a carbosilane-based photocurable composition, and more particularly, to a carbosilane-based composition capable of exhibiting photocurable properties by mixing a liquid or molten polycarbosilane with a monosilane containing a functional group.
고분자-유래 세라믹(Polymer Derived Ceramics, PDCs)은 무기고분자로부터 열분해에 의해 SiC, SiOC, SiCN, SiBCN, BCN, AlN 또는 다른 조성물로 전환되어 형성되는 다기능성 세라믹의 일종이다. 결정성 세라믹 분말 기반의 고전적 세라믹 성형방법과 비교하여, 세라믹 수지 전구체는 성형이 용이한 액상을 이용함으로서 보다 다용도에 적용이 가능하다는 특징이 있다. Polymer-derived ceramics (PDCs) are a kind of multifunctional ceramics formed by converting inorganic polymers into SiC, SiOC, SiCN, SiBCN, BCN, AlN or other compositions by thermal decomposition. Compared with the classical ceramic molding method based on crystalline ceramic powder, the ceramic resin precursor has a feature that it can be applied to a more versatile use by using a liquid phase that is easy to form.
그러나, 이와 같은 세라믹 수지 전구체는 열처리 단계를 거쳐 세라믹으로 전환되는데, 고분자 특성을 가지고 있으므로 이 때 경화 단계를 거쳐 열안정성이 확보되지 않으면 용융 또는 끓게 되어 성형상태가 무너지게 된다. However, such a ceramic resin precursor is converted into a ceramic through a heat treatment step, and since it has polymer properties, if thermal stability is not secured through the curing step at this time, it melts or boils and the molded state collapses.
또한, 액상의 세라믹 수지 전구체들은 열처리를 통한 세라믹 전환시, 약 1,000 ℃이내 온도 범위에서 끓거나 휘발이 되어 전환율이 급격히 떨어질 뿐만 아니라 크게는 80% 이상의 급격한 중량 감소를 야기하므로 경화 단계가 필수적이다. 특히 SiC 전구체로 알려진 폴리카보실란은, 산화특성을 이용한 열경화가 일반적인데, 이 경우 150 ℃ 이상의 온도를 요구하므로 액상 실란의 경우 경화 및 성형성을 유지하는 것이 용이하지 않다.In addition, the liquid ceramic resin precursor boils or volatilizes in a temperature range of about 1,000 ° C. or less during ceramic conversion through heat treatment, resulting in a sharp drop in conversion rate and a rapid weight reduction of 80% or more, so a curing step is essential. In particular, polycarbosilane known as a SiC precursor is generally thermally cured using oxidation properties. In this case, it requires a temperature of 150° C. or higher, so it is not easy to maintain curing and moldability in the case of liquid silane.
이에 본 발명은 상기와 같은 종래의 제반 문제점을 해소하기 위해 제안된 것으로, 본 발명의 목적은 액상 상태의 폴리카보실란을 광경화성 세라믹 전구체로서 이용하여 광중합 방식의 성형성형을 가능하게 하고 이 성형물을 열분해하여 세라믹으로 전환할 수 있는 카보실란계 광경화성 조성물을 제공하는데 있다.Accordingly, the present invention has been proposed to solve the problems of the related art as described above, and an object of the present invention is to enable photopolymerization-type molding by using polycarbosilane in a liquid state as a photocurable ceramic precursor, and An object of the present invention is to provide a carbosilane-based photocurable composition that can be converted into ceramic by thermal decomposition.
한편으로, 본 발명은On the one hand, the present invention
폴리카보실란;polycarbosilane;
비닐기 또는 알릴기를 포함하는 모노실란 화합물; 및a monosilane compound containing a vinyl group or an allyl group; and
광개시제;를 포함하는, 카보실란계 광경화성 조성물을 제공한다.It provides a carbosilane-based photocurable composition comprising; a photoinitiator.
본 발명에 따른 조성물은 광경화 기전이 없는 상용 폴리카보실란을 출발물질로 사용하되 광경화성 모노머인 vinyl- (C=C-) 또는 allyl- (C=C-C-)을 포함하는 모노실란을 함께 혼합함으로써 광경화성을 나타낼 수 있다. The composition according to the present invention uses a commercially available polycarbosilane without a photocuring mechanism as a starting material, but a monosilane containing a photocurable monomer vinyl- (C=C-) or allyl- (C=CC-) is mixed together. By doing so, photocurability can be exhibited.
또한, 성형과정에서는 액상 상태로 성형이 가능하므로 성형을 위해 고온 용융환경 조성 및 유기용매를 이용한 용액제조를 필요로 하지 않고 액상 그대로 성형이 가능하다는 특징이 있다. In addition, since molding is possible in a liquid state during the molding process, there is a feature that molding is possible in a liquid state without the need for a solution using a high temperature melting environment composition and an organic solvent for molding.
뿐만 아니라 세라믹 전구체로 사용되는 광경화성 조성물인 폴리카보실란은 광경화 작용기로 인해 세라믹 성형과 동시에 경화가 가능하여 산화 특성을 이용한 열경화 단계를 필요로 하지 않으므로 산소의 유입을 차단함으로써 산화현상을 최소화하고, 이로 인해 탄화규소(SiC) 전환율을 향상시킬 수 있다.In addition, polycarbosilane, a photocurable composition used as a ceramic precursor, can be cured at the same time as ceramic molding due to a photocurable functional group, so it does not require a thermosetting step using oxidation properties, thereby minimizing oxidation by blocking the inflow of oxygen. and, thereby, the silicon carbide (SiC) conversion rate may be improved.
또한, 본 발명에 따른 조성물은 3D 프린팅, 코팅, 포토레지스트리 패터닝, 미세전자기계시스템(MEMS), 섬유강화 세라믹기지재 복합체(CMC, ceramic matrix composite) 제조 등에 적용 가능하다.In addition, the composition according to the present invention is applicable to 3D printing, coating, photoregistry patterning, microelectromechanical system (MEMS), fiber-reinforced ceramic matrix composite (CMC, ceramic matrix composite) manufacturing, etc.
도 1은 본 발명의 일 실시형태에 따른 PCS 조성물의 광경화 특성을 확인한 결과를 나타낸 것이다.
도 2는 본 발명의 일 실시형태에 따른 PCS 조성물의 경화 전/후에 대한 FT-IR 스펙트럼 결과를 나타낸 것이다.
도 3은 본 발명의 일 실시형태에 따라 광경화 조건에서 경화된 PCS 조성물의 열분석 결과를 나타낸 것이다.
도 4는 본 발명의 일 실시형태에 따라 광조형 방식에 의해 성형된 PCS 성형체를 나타낸 것이다.1 shows the results of confirming the photocuring characteristics of the PCS composition according to an embodiment of the present invention.
2 shows FT-IR spectral results before and after curing of the PCS composition according to an embodiment of the present invention.
3 shows the results of thermal analysis of the PCS composition cured under photocuring conditions according to an embodiment of the present invention.
4 shows a PCS molded body molded by stereolithography according to an embodiment of the present invention.
이하, 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.
본 발명의 일 실시형태에 따른 카보실란계 광경화성 조성물은,Carbosilane-based photocurable composition according to an embodiment of the present invention,
폴리카보실란;polycarbosilane;
비닐기(vinyl) 또는 알릴기(allyl)를 포함하는 모노실란 화합물; 및a monosilane compound containing a vinyl group or an allyl group; and
광개시제;를 포함하는 것을 특징으로 한다. Photoinitiator; characterized in that it contains.
카보실란(carbosilane)계 고분자의 대표적인 반응부(site)는 Si-H 결합이며, 주로 산화 또는 라디칼 반응에 의해 중합 반응이 가능하므로 광개시재와 같은 촉매제와 가교제(crosslinker)가 요구된다.A representative site of a carbosilane-based polymer is a Si-H bond, and a catalyst such as a photoinitiator and a crosslinker are required because polymerization reaction is possible mainly by oxidation or radical reaction.
일반적으로, 광조형 기술 분야에서 가교제는 아크릴레이트(acrylate), 에폭시(epoxy) 등의 작용기를 가지고 있는 모노머(monomer)를 이용하여 레진 조성물을 설계하고 있으나, 본 발명에 따른 카보실란계 광경화성 조성물은 액상의 폴리카보실란 상용제품을 적용하되 vinyl- (C=C-) 또는 allyl- (C=C-C-)을 포함하는 모노실란 화합물을 모노머로 사용하여 안정적인 라디칼을 형성할 수 있는 것을 특징으로 한다.In general, in the field of stereolithography, a resin composition is designed using a monomer having a functional group such as an acrylate or an epoxy as a crosslinking agent, but the carbosilane-based photocurable composition according to the present invention It is characterized in that it can form a stable radical by using a liquid polycarbosilane commercial product, but using a monosilane compound containing vinyl- (C=C-) or allyl- (C=CC-) as a monomer. .
일반적으로 폴리카보실란은 polycarbosilane, poly(silylenemethylene), PCS 로 지칭하며 아래 화학식 1과 같고, SiC 또는 SiOC 전구체이며, 산화반응에 의해 Si-O-Si 결합을 형성함으로써 경화단계를 둔다. In general, polycarbosilane is referred to as polycarbosilane, poly(silylenemethylene), and PCS, as shown in Formula 1 below, is a SiC or SiOC precursor, and has a curing step by forming a Si-O-Si bond by oxidation.
[화학식 1][Formula 1]
본 발명에 따른 광경화성 폴리카보실란을 이용하여 세라믹 SiC를 제조하는 경우, 산화반응에 의한 경화가 불필요하다. 산화반응을 이용한 경화는 150 ℃ 이상 조건에서 수행되는 반응이므로 고체상의 폴리카보실란을 이용하여 성형완료 후에야 경화가 가능하지만, 본 발명에 따른 광경화성 폴리카보실란 적용시에는 성형과 동시에 경화가 가능해질 뿐만 아니라 산화현상을 최소화하여 산소의 유입 차단과 SiC로의 전환율을 높일 수 있다. When the ceramic SiC is manufactured using the photocurable polycarbosilane according to the present invention, curing by oxidation reaction is unnecessary. Since curing using oxidation reaction is a reaction carried out under conditions of 150 ° C. or higher, curing is possible only after molding is completed using solid polycarbosilane. However, when the photocurable polycarbosilane according to the present invention is applied, curing will be possible at the same time as molding. In addition, by minimizing the oxidation phenomenon, it is possible to block the inflow of oxygen and increase the conversion rate to SiC.
본 발명의 일 실시형태에서, 상기 액상의 폴리카보실란은 광개시제와 함께 모노실란 화합물과 블랜딩함으로써 제조될 수 있다. In one embodiment of the present invention, the liquid polycarbosilane may be prepared by blending with a monosilane compound together with a photoinitiator.
상기 모노실란 화합물은 비닐(vinyl)계 또는 알릴(allyl)계 화합물이면 제한없이 사용할 수 있으나, 구체적으로 테트라비닐실란(tetravinyl silane), 디메틸디비닐실란(dimethyldivinylsilane), 테트라알릴실란(tetraallylsilane), 디알릴디메틸실란(diallyldimethylsilane), 1,3-디비닐테트라메틸디실록산(1,3-divinyltetramethyldisiloxane), 2,4,6,8-테트라메틸-2,4,6,8-테트라비닐시클로테트라실록산(2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane), 2,4,6-트리메틸-2,4,6-트리비닐시클로트리실라잔(2,4,6-trimethyl-2,4,6-trivinylcyclotrisilazane), 액상의 비닐(vinyl)계 폴리카보실란 등을 사용할 수 있다.The monosilane compound may be used without limitation as long as it is a vinyl-based or allyl-based compound, but specifically, tetravinyl silane, dimethyldivinylsilane, tetraallylsilane, di Allyldimethylsilane, 1,3-divinyltetramethyldisiloxane, 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane ( 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane), 2,4,6-trimethyl-2,4,6-trivinylcyclotrisilazane (2,4,6-trimethyl- 2,4,6-trivinylcyclotrisilazane), liquid vinyl polycarbosilane, etc. may be used.
상기 광개시제는 2,2-디메톡시-2-페닐아세토페논(2,2-dimethoxy-2-phenylacetophenone), 2-하이드록시-2-메틸프로피오페논(2-hydroxy-2-methylpropiophenone), 페닐비스(2,4,6-트리메틸벤조일)포스핀 옥사이드(Phenylbis(2,4,6-trimethylbenzoyl)phospine oxide) 및 디페닐(2,4,6-트리메틸벤조일)포스핀 옥사이드(diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide)로 구성되는 군으로부터 선택되는 1종 이상을 포함하는 혼합 광개시제일 수 있으나, 이에 제한되는 것은 아니다.The photoinitiator is 2,2-dimethoxy-2-phenylacetophenone (2,2-dimethoxy-2-phenylacetophenone), 2-hydroxy-2-methylpropiophenone (2-hydroxy-2-methylpropiophenone), phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide (Phenylbis (2,4,6-trimethylbenzoyl) phospine oxide) and diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide (diphenyl (2,4, 6-trimethylbenzoyl)phosphine oxide) may be a mixed photoinitiator comprising at least one selected from the group consisting of, but is not limited thereto.
상기 vinyl (C=C-) 또는 allyl (C=C-C-) 작용기가 치환된 폴리카보실란은 광개시제와 혼합하여 광경화성 폴리카보실란으로 제조되며, UV 경화가 가능한 원료 및 세라믹 전구체로서 사용될 수 있다.The polycarbosilane substituted with the vinyl (C=C-) or ally (C=C-C-) functional group is mixed with a photoinitiator to produce a photocurable polycarbosilane, and may be used as a UV-curable raw material and a ceramic precursor.
상기 광경화성 폴리카보실란은 액상의 프리 세라믹 폴리머로서, 탄화규소 전구체로 사용되어 UV 경화 과정에서 액상에서 고상으로 상전이가 되고, 열처리 단계에서 SiC 세라믹으로 전환될 수 있다.The photocurable polycarbosilane is a liquid free ceramic polymer, which is used as a silicon carbide precursor to undergo a phase transition from a liquid phase to a solid phase during UV curing, and may be converted into SiC ceramics during a heat treatment step.
본 발명은 카보실란계 광경화성 조성물의 제조방법에 관한 것으로,The present invention relates to a method for preparing a carbosilane-based photocurable composition,
(i) 액상 폴리카보실란 및 광경화성 모노실란 화합물을 혼합한 혼합용액을 제조하는 단계; 및(i) preparing a mixed solution in which a liquid polycarbosilane and a photocurable monosilane compound are mixed; and
(ii) 상기 혼합용액에 광개시제를 첨가하여 액상 카보실란계 광경화성 조성물을 제조하는 단계;를 포함하는 것을 특징으로 한다.(ii) adding a photoinitiator to the mixed solution to prepare a liquid carbosilane-based photocurable composition;
또한, 본 발명은 상기 카보실란계 광경화성 조성물을 경화 및 열처리하여 탄화규소로 전환시키는 것을 특징으로 한다.In addition, the present invention is characterized in that the carbosilane-based photocurable composition is converted into silicon carbide by curing and heat treatment.
본 발명의 일 실시형태에 따른 카보실란계 광경화성 조성물은 UV 램프에 노출시켜 경화하고, 열처리하여 탄화규소로 제조될 수 있다.The carbosilane-based photocurable composition according to an embodiment of the present invention may be cured by exposure to a UV lamp, and may be made of silicon carbide by heat treatment.
상기 열처리는 1,000 내지 1,800 ℃에서 수행되는 것이 바람직하다. 일반적으로 300 내지 600 ℃에서 열분해가 발생하기 시작하며, 800 내지 1,000 ℃에서 열분해가 완료된다. 1,200 ℃부터는 결정화(nucleation)가 시작되며, 1,400 ℃ 이상에서는 결정이 성장하는 구간이므로 일반적으로 1,800 ℃까지 열처리를 수행하는 것이 바람직하다.The heat treatment is preferably performed at 1,000 to 1,800 °C. In general, thermal decomposition begins at 300 to 600 °C, and thermal decomposition is completed at 800 to 1,000 °C. From 1,200 °C, crystallization begins, and at 1,400 °C or higher, it is preferable to perform heat treatment up to 1,800 °C because crystals are grown.
종래 고분자 유래 세라믹스 기반 SiC 제조공정에서는 성형물의 형상이 고분자의 용융, 끓음 현상으로 인하여 무너질 수 있어 경화 공정을 필수로 수행해야 하는데, 특히 카보실란계 고분자는 150 내지 300 ℃에서 산화반응에 의한 경화가 가능하다. 이때, 일부 실리콘 원자가 Si-O 결합을 형성하면서 경화된 카보실란계 고분자는 열분해 단계에서 유리질의 SiOC 구조를 형성하고, 1,200 ℃에서는 결정화가 시작되며, 1,400 ℃ 이상의 고온에서는 경화 단계에서 유입된 산소에 의해 2차 열분해가 진행되어 2차 중량감소를 수반한다. 또한 이 온도에서는 열분해와 동시에 형성된 결정이 성장을 하게 되는데 1,800 ℃ 이상 온도까지 성장이 지속된다. In the conventional SiC manufacturing process based on polymer-derived ceramics, the shape of the molded product may collapse due to the melting and boiling phenomenon of the polymer, and thus the curing process must be performed. In particular, carbosilane-based polymers cannot be cured by oxidation at 150 to 300 ° C. It is possible. At this time, the carbosilane-based polymer cured while some silicon atoms form Si-O bonds forms a glassy SiOC structure in the thermal decomposition step, crystallization starts at 1,200 ° C., and at a high temperature of 1,400 ° C. The secondary pyrolysis proceeds by the secondary weight reduction. In addition, at this temperature, the crystals formed at the same time as thermal decomposition grow, and the growth continues up to a temperature of 1,800 °C or higher.
본 발명의 일 실시형태에서, 상기 경화 과정은 카보실란계 광경화성 조성물이 광경화가 진행되면서 성형물이 형성되므로, 열처리를 통한 성형과 동시에 경화가 가능하여 산화반응에 의한 경화가 불필요하다. 따라서, 2차 열분해를 수반하지 않으므로 세라믹 수율이 높을 뿐만 아니라 성형체의 변형률이 적은 상태에서 SiC로 전환이 가능해진다.In one embodiment of the present invention, in the curing process, since the carbosilane-based photocurable composition is photocured to form a molded product, it can be cured at the same time as molding through heat treatment, so curing by oxidation reaction is unnecessary. Therefore, since secondary thermal decomposition is not involved, it is possible to convert to SiC in a state where the ceramic yield is high and the deformation rate of the molded body is small.
이하, 실시예에 의해 본 발명을 보다 구체적으로 설명하고자 한다. 이들 실시예는 오직 본 발명을 설명하기 위한 것으로, 본 발명의 범위가 이들 실시예에 국한되지 않는다는 것은 당업자에게 있어서 자명하다. Hereinafter, the present invention will be described in more detail by way of Examples. These examples are only for illustrating the present invention, and it will be apparent to those skilled in the art that the scope of the present invention is not limited to these examples.
실시예 1 : 카보실란계 광경화성 조성물의 제조Example 1: Preparation of carbosilane-based photocurable composition
수평균분자량 900 g/mol 이하의 액상 PCS와 테트라 비닐 실란(tetra vinyl silane, TVS)을 7:3의 비율로 혼합한 후, 광개시제 1-하이드록시시클로헥실페닐케톤(1-Hydroxy cyclohexyl phenyl ketone, HCPK)을 1 wt% 첨가하여 카보실란계 광경화성 조성물을 제조하였다. After mixing liquid PCS with a number average molecular weight of 900 g/mol or less and tetra vinyl silane (TVS) in a ratio of 7:3, a photoinitiator 1-hydroxycyclohexyl phenyl ketone (1-Hydroxy cyclohexyl phenyl ketone, HCPK) was added in 1 wt% to prepare a carbosilane-based photocurable composition.
실시예 2 : 경화 시험 Example 2: Curing Test
다음으로 광경화 시험을 위하여, 상기 실시예 1의 카보실란계 광경화성 조성물을 슬라이드 글라스에 도포하고 (a) 405 nm, (b) 자연광, (c) 365 nm 램프 조건에서 각각 노출하여 경화 테스트를 실시하였다(도 1 참조).Next, for the photo-curing test, the carbosilane-based photo-curable composition of Example 1 was applied to a slide glass and exposed to each of (a) 405 nm, (b) natural light, and (c) 365 nm lamp conditions to perform a curing test. was carried out (see Fig. 1).
도 1을 참조로, 경화된 투명막은 사진에 잘 투사되지 않으므로 스크래치를 내어 그 정도를 확인할 수 있었는데, 365 nm 조건의 경우에는 이를 긁어낼 수 있을 정도의 두꺼운 도막이 형성되는 것을 확인하였다.Referring to FIG. 1, the cured transparent film is not well projected on the picture, so it was possible to check the extent by making a scratch, and in the case of 365 nm conditions, it was confirmed that a thick coating film enough to scrape it was formed.
실시예 3 : 성형시험 Example 3: Molding test
상기 실시예 1의 카보실란계 광경화성 조성물을 광조형 방식의 3D 프린터를 이용하여 성형 테스트를 실시하였다(도 4 참조).The carbosilane-based photocurable composition of Example 1 was subjected to a molding test using a stereolithography 3D printer (see FIG. 4 ).
도 2는 상기 실시예 1에 의해 제조된 카보실란계 광경화성 조성물을 경화하기 전, 후를 비교한 FT-IR 스펙트럼 결과이다. 2 is an FT-IR spectrum result comparing the carbosilane-based photocurable composition prepared in Example 1 before and after curing.
상기 조성물의 제조에 사용되는 폴리카보실란(PCS)은 Si-H (2,118 cm-1) site가 풍부하며, 경화 반응에 의해 vinyl-의 =C-H, C=C vibration에 해당하는 wavenumber 3,080 cm-1, 1,630 cm-1 위치의 peak intensity가 감소되는 것을 확인할 수 있었다.Polycarbosilane (PCS) used in the preparation of the composition is rich in Si-H (2,118 cm -1 ) sites, and wavenumber 3,080 cm -1 corresponding to =CH, C=C vibration of vinyl- by curing reaction , it was confirmed that the peak intensity at the position of 1,630 cm -1 was decreased.
도 3을 참조로, 액상의 PCS는 200 ℃미만 조건에서부터 열분되기 시작하여 400 ℃까지 큰 폭으로 중량이 감소하여 열분해 수율이 20%가 채 되지 않았음을 확인할 수 있었다. 그러나, 상기 실시예 1에 의해 제조된 카보실란계 광경화성 조성물로부터 경화된 성형물은 열분해 수율이 60% 수준으로 향상되었음을 확인할 수 있었다. Referring to FIG. 3 , it was confirmed that the pyrolysis yield of PCS in the liquid phase was less than 20% as the weight of the liquid PCS started to be thermally decomposed under the condition of less than 200°C and decreased significantly up to 400°C. However, it was confirmed that the thermal decomposition yield of the molded article cured from the carbosilane-based photocurable composition prepared in Example 1 was improved to a level of 60%.
이상으로 본 발명의 특정한 부분을 상세히 기술하였는 바, 본 발명이 속한 기술분야에서 통상의 지식을 가진 자에게 있어서 이러한 구체적인 기술은 단지 바람직한 구현예일 뿐이며, 이에 본 발명의 범위가 제한되는 것이 아님은 명백하다. 본 발명이 속한 기술분야에서 통상의 지식을 가진 자라면 상기 내용을 바탕으로 본 발명의 범주 내에서 다양한 응용 및 변형을 행하는 것이 가능할 것이다.As the specific part of the present invention has been described in detail above, for those of ordinary skill in the art to which the present invention pertains, it is clear that these specific techniques are only preferred embodiments, and the scope of the present invention is not limited thereto. Do. Those of ordinary skill in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above contents.
따라서, 본 발명의 실질적인 범위는 첨부된 특허청구범위와 그의 등가물에 의하여 정의된다고 할 것이다.Accordingly, the substantial scope of the present invention will be defined by the appended claims and their equivalents.
Claims (8)
비닐기 또는 알릴기를 포함하는 모노실란 화합물; 및
광개시제;를 포함하는 것을 특징으로 하는, 카보실란계 광경화성 조성물.polycarbosilane;
a monosilane compound containing a vinyl group or an allyl group; and
A photoinitiator; characterized in that it comprises a carbosilane-based photocurable composition.
(ii) 상기 혼합용액에 광개시제를 첨가하여 액상 카보실란계 광경화성 조성물을 제조하는 단계;를 포함하는 것을 특징으로 하는, 카보실란계 광경화성 조성물의 제조방법.(i) preparing a mixed solution in which a liquid polycarbosilane and a photocurable monosilane compound are mixed; and
(ii) adding a photoinitiator to the mixed solution to prepare a liquid carbosilane-based photocurable composition;
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