• 한국응용과학기술학회지
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• 제23권1호
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• pp.85-91
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• 2006

Acrylic resins (HSCs : EA/EMA/2-HEMA/CLA) which contain 80% solid content were synthesized by the copolymerization of monomers (ethyl acrylate, ethyl methacrylate, 2-hydroxyethyl methacrylate) and functional monomer (caprolactone acrylate : CLA) which improves the crosslinking density and physical properties of films. The physical properties of the prepared acrylic resins (HSCs) containing CLA, are as follows: viscosity 1440$^{\sim}$2630 cps ; $M_n$ 1590$^{\sim}$1660 ; and conversions, 81$^{\sim}$86%, respectively. From the correlation of $T_g$ values, viscosities, and $M_n$ of the HSCs, it was found thst viscosity and $M_n$ increased with $T_g$ value.

• 대한치과의사협회지
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• 제16권3호통권106호
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• pp.235-237
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• 1978

Dr. Walter Wright first presented the results of his studies on acrylic resins in July, 1937. The use of resins for adaptation in inlay and crown and bridge prosthesis was first reported in June 1940 by Harris. There has been now and acceptable list of several physical and mechanical properties of acrylic resins which have been studied to a considerable extent by various researchers, or determined from clinical experience. They include; pleasant esthetics, taste, odor, cleanliness, compatibility with oral tissue, dimensional stability, water sorption by imbibition, hardness, ease and success of repair, weight, thermal coefficient of expansion and strength to resist functional stress. The author carried a series of experiments forward to check the strength. Specimens which were cured at boiling temperature showed weaker strength than those ones which were cured at 72℃.

• 한국응용과학기술학회지
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• 제29권4호
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• pp.618-625
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• 2012

본 연구에서는 수용성 아크릴을 합성한 다음 수성 카제인 수지를 합성하여 기합성 완성된 아크릴 수지에 카제인 수지의 적하량을 점차 증가시켜 변화하는 물성을 피혁(Lamb leather)에 표면 코팅하여 물성을 측정 분석하였다. 내용제성 측정 결과 높은 내용제성 물성을 지닌 아크릴 수지와 카제인 수지의 함량이 물성 변화에 끼치지 않았으며 모두 높은 물성치를 나타내었다. 인장 강도 측정치에서는 아크릴 단독 코팅의 측정치가 $1.399kg_f/mm^2$로 가장 낮은 수치를 나타내었으며, 카제인 수지의 합량이 제일 높은 WAC-3가 가장 높은 인장력 $1.426kg_f/mm^2$을 나타내었다. 또한 내마모도 측정에서는 WAC-3가 제일 높은 69.774 mg.loss로 우수한 물성변화를 나타내었고, 연실률의 경우 아크릴 단독 코팅인 WAR이 820 %로 가장 높은 수치를 나타내었다.

• 대한치과보철학회지
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• 제30권2호
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• pp.247-257
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• 1992

The present study quantitates the in vitro cytotoxicity of a variety of denture base acrylic resins using cell culture techniques combined with image analysis to measure nuclear area and DNA contents. In this study, a comparison was made among direct curing, heat curing and microwave curing resins. The results obtained from this study were as follows : 1. Morphologically, cell process and nucleus became prominent but macroscopic difference according to the resins were nit observed. In addition, increased cellular density around the specimen were observed. 2. In DNA contents measurements, $S-G_2M$ phase cell was 15.47%, 14.58% in control and heat curing resin on 1st day and the others group $21.39\sim33.36%$ were measured. 3. Nuclear area and DNA contents were increased on 3rd day except DNA content of the microwave curing resin group. These results suggest that denture base acrylic resins stimulate gingival fibroblasts in vitro, especially stimulation of direct curing resin is larger and longer than the others.

• 한국응용과학기술학회지
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• 제18권1호
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• pp.20-28
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• 2001

Acrylic quarternary polymers were synthesized to prepare high-solid coatings. Acrylic resins were synthesized by the radical polymerization of n-butyl acrylate, methyl methacrylate, 2-hydroxyethyl methacrylate and acetoacetoxyethyl methacrylate. From the results of experiment on reaction condition to get high-solid acrylic resins with 70% solid content and viscosity of 1200cps, it was found that di-tert-amyl peroxide among the four types of initiators have lower viscosity and higher degree of conversion. The optinum initiator amount, chain transfer agent, reaction temperature and the dropping time were 5wt%, 4wt%, $150^{\circ}C$ and 5hrs, respectively.

• Korean Chemical Engineering Research
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• 제55권5호
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• pp.586-592
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• 2017

본 연구에서는 n-butyl acrylate (BA), methyl methacrylate (MMA), 2-hydroxypropyl methacrylate (HPMA) 및 acetoacetoxyethyl methacrylate(AAEM) 단량체를 부가 중합시켜 고형분이 75%인 아크릴수지를 합성하였다. 이때, 아크릴수지의 유리전이온도($T_g$)를 20, 30, $40^{\circ}C$로, 수산기가(OH value)를 60, 90, 120으로 변화시켰다. 그 결과, 아크릴수지의 점성도는 $T_g$와 수산기가가 증가할수록 증가하였다. 합성된 아크릴수지는 높은 가교밀도를 갖도록 설계되어 고탄력성과 고내구성을 유지하였다. 가교된 아크릴수지는 블록이소시아네이트(Desmodur BL-3175)와 경화 반응시켜 아크릴 우레탄 투명 도료를 제조하는데 사용되었다. 도료에 대하여 점성도, 접착성, 연필경도 및 $60^{\circ}$ 경면광택도 등의 측정을 통해 물리적 특성을 분석하였고, 아크릴 우레탄 투명 도료는 코일코팅용 상도 도료로서 적용되기 위하여 시편으로 제조되어 다양한 특성이 평가되었다. 제조된 도료는 접착력이 뛰어났고, $60^{\circ}$ 경면광택도와 연필경도에서 우수한 특성을 나타내었으며, 환경 친화적이었다.

• 한국응용과학기술학회지
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• 제23권4호
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• pp.319-327
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• 2006

In order to prepare high-solid coatings, first acrylic resins (HSAs) which contain 80% solid were synthesized, and then the prepared resins were cured with isocyanate at room temperature. In the synthesis of HSAs, viscosity, number average molecular weight $(M_n)$ and conversion were $1372{\sim}2700$ cps, $1520{\sim}1650$ and $83{\sim}87%$, respectively. Among the four kinds of initiators used, tert-amylperoxy-2-ethyl hexanoate was the most proper one in the synthesis of HSAs. With increasing $T_g$ values, viscosity increased rapidly and molecular weight increased slowly. As a result of the examination of coated films, it was found that $60^{\circ}$ specular gloss, impact resistance, heat resistance and cross-hatch adhesion were good, and pencil hardness, drying time and pot life were poor.

• 공업화학
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• 제5권4호
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• pp.743-747
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• 1994

Acrylic urethane 수지의 경화반응에서 아크릴수지 중의 carboxylic acid 함유량과 dibutyltin dilaurate(DBTL)의 촉매 효과가 반응속도에 미치는 영향을 검토하였다. 얇은막의 상태에서 acrylic polyol과 지방족 isocyanate의 biuret화합물과의 경화반응은 2차식에 따른다. 그리고 acrylic polyol 중의 carboxylic acid의 양이 반응속도에 미치는 영향은 매우 크며, isocyanate지에 대한 강한 촉매 효과가 나타났다. 한편 carboxylic acid를 함유하지 않은 acrylic polyol에 DBTL을 첨가하면 촉매효과가 많이 나타나지만, carboxylic acid를 함유한 acrylic polyol의 경우에는 그 효과가 적게 나타났다.

• 폴리머
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• 제25권3호
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• pp.349-358
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• 2001

고내후성 시릴기를 함유하는 아크릴수지 도료를 제조할 목적으로, 먼저 아크릴수지를 단량체 n-butyl methacrylate, methyl methacrylate, n-butyl acrylate 및 3-methacryloxypropyl-trimethoxysilane (MPTS)을 사용하여 이들을 부가중합시켜 얻었다. 아크릴 공중합체의$T_g$를 $20^{\circ}C$로 조정하면서 MPTS 함량을 10, 20, 30wt%로 변화시켜 합성하였다. 아크릴수지 합성에서 실리콘 성분인 MPTS 양이 많아질수록 점성도가 저하되었으며, 고온에서의 열적 안정성은 향상되었다. 한편 합성된 아크릴수지를 백색안료와 블렌드하여 도료를 제조한 후 도막물성을 시험한 결과, 여러 가지 피도물에 대하여 우수한 접착력을 보였고 기타의 물성들도 대체로 좋게 나타났다. 내후성 시험은 옥외폭로시험, WOM 및 QUV의 3종류로 하였는데, 각종 측정 수치로 보아 MPTS 함량 30wt%인 아크릴수지 도료는 고내후성 도료임이 확인되었다.

• 대한치과보철학회지
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• 제31권4호
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• pp.515-522
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• 1993

The purpose of this study was to evaluate the bond strength of rebase resin to denture base resin. The denture base resins in this study were Premium Super-20(Lang Dental Mfg. Co. Inc., Wheeling, USA) and Lucitone 199(Dentsply International Inc., York, USA). And the rebase resins were Repair Acrylic(Lang Dental Mfg. Co. Inc., Wheeling USA). Toughron Rebase(Miki Chemical Product Co. Ltd., Japan) , Tokuso Rebase(Tokuyama Soda. Co. Ltd., Japan) and Triad VLC Reline Material(Dentsply International Inc., York, USA). The obtained results were as follows : 1. The bond strength of Repair Acrylic to Premium Super-20, and that of Toughron Rebase to Lucitone 199 were the highest. 2. In Premium Super-20 and Lucitone 199, bond strength of all rebase resins had significant differences. 3. The bond strength of Triad VLC Reline Material was inclined to the lowset.