Environmental friendly acrylic/urea high-solid paint(MUHC) were prepared through the curing reaction of acrylics resin(EBHC) containing 70wt% of solids content and butylated urea curing agent. The synthesis of EBHC Was done at 150℃ for 6 hours, and the results were obtained as follows : Mn=1830~2190, Mw 3290~4000, Mw/Mn=1.80~1.83 viscosity=110~352 cps, and conversion=82~92%. After the film was coated with MUHC, the various physical properties were measured. They showed that enhancement of the coating properties such as adhesion, flexibility, abrasion resistance, impact resistance, and water resistance could be expected through introdl1cing caprolactone acrylate component in acrylics resin for the high-solids content acrylics/urea coatings.

An acrylic resin was synthesized with several monomers, styrene(St), 2-hydroxyethyl methacrylate(2-HEMA), n-butyl acrylate, methyl methacrylate, and acetoacetoxyethl methacrylate(AAEM) to prepare a high-solid coatings. Then, a high-solid acryl/melamine coatings was prepared by curing the acrylic resin with a curing agent, hexamethoxymethylmelamine(HMMM). The curing behavior of the acrylic resin with HMMM was investigated by the Ozawa method using DSC. For AAEM/HMMM and 2-HEMA/HMMM curing reactions, activation energies were 33.01 and 27.12 kcal/mol and frequency factors were 9.54×1015 and 1.53×1013 min-1, respectively. From the results, it was found out that 2-HEMA showed higher reactivity with the curing agent than AAEM.

To prepare an environmental friendly high-solid coatings an acrylic resin containing 80% of solid content was synthesized by addition polymerization of caprolactone acrylate, n-butyl acrylate, ethyl methacrylate, and 2-hydroxyethyl methacrylate. The conversion was 78~93% and the prepared resin's physical properties are as follows: viscosity, 212~3424cps: Mn 1740~2400. There was a trend that viscosity and molecular weight of the resin increased with Tg, but no direct proportionality was observed.

고 고형분함량 감자 생산을 위한 수확시기를 예측하는 데 있어 에너지 소모량의 추정에 대한 연구결과는 다음과 같다. 1. 각 지역별로 포장의 파종시기부터 수확시기까지 최근 5년간(2005년~2009년) 평균기온, 강수량, 상대습도, 일조시간, 바람, 지중온도 등의 농업환경을 조사한 결과 파종기 저온피해와 괴경비대기 장마기간을 회피한다면 가공용 원료감자는 가공품 생산에 필요시마다 물량을 수급하기 때문에 만숙재배를 하지 않아 품종의존도가 낮아 수확시기의 환경에 대한 비중이 큰 것으로 판단되었다. 2. 파종시기부터 출현까지에는 지중온도에 영향을 많이 받아 지역별 편차가 심해 시뮬레이션에서는 출현시기를 기준으로 감자의 수확적기를 예측하는 것이 바람직하였다. 3 수확시기를 예측하기 위한 생장모형은 Tp=Tm~cdotWmTpWmTm를 사용하고, 생장량 Wm을 계상하는 기본 생장모형은 Wm=~intmtf(x)dt 를 사용하였다. 4. 기본 생장모형을 통해 Wm을 계상할 때는 광합성율(δA )과 식물체내 에너지 소모(δE ) 개념을 적용해야 보다 정밀한 수확시기를 예측할 수 있었으며, 식물체내 에너지 소모에 대한 정의는 기후변화에 대응하여 농업환경에 대처하는 식물체내 에너지 소모를 계상하는 것으로 최근 5년간(2005년~2009년) 수확시기에 따라 고형분함량을 측정한 결과 광합성율만 계상할 때 보다 에너지 소모개념을 적용한 것이 효과적이었다.

Manufactures of automotive repair finishes are tending to reduce more and more the level of volatile organic compounds (VOCs) in their paint processes in order to comply with increasingly strict environmental legislation. The production of high solids paints is a way to solve this problem. However, the application of high-solids paints is limited primarily by the viscosity of resin which is strongly related to painting ability: the higher solid content, the lower desired property. In this study, alkyl copolymer with low viscosity was synthesized by the introduction of the monomers with long-side chains and functional groups which improve flexibility and cross-linking density, respectively. The solid content of the paint prepared with the synthesized resin was 80 wt% and its VOCs was reduced by 20%, compared to the commercialized paint. Also, the physical and mechanical properties of coatings on steel sheets were similar to commercialized one.