## Waste treatment, Recycling

## Environmental Sciences

Development of entertaining, textured paints "Dimple Art Color" paint using waste windshield interlayer

Keyword: Recycling of Macromolecule Material, Production of Texture on Painted Surface, Technology Transfer through Collaboration with the Local Industry

Organizations Involved

○ Takao Kimura, Professor, Faculty of Engineering, Utsunomiya University

☐ Giichi Iwasaki, President, N.P.R, Limited

☐ Yasushi Ando, Director, N.P.R, Limited

Professor Kimura

President Iwasaki

Director Ando

## 【Abstract】

Faculty of Engineering, Utsunomiya University carried out research into utilization of the polyvinyl butylal solution obtained through the project "Development of a separation method of the interlayer in the windshield of the scrap car", founded N.P.R, Limited, which is the first venture business in Utsunomiya University, in collaboration with enterprisers in Karasuyama-machi, Tochigi prefecture in October 2003, and succeeded in developing paints and sticky paper which have textured surface.

## [Summary of the technology transfer]

## Technological Impact

“Dimple Art Color”, made of polyvinyl butylal extracted from the windshield of the scrap car, produces interesting and entertaining dimpled texture when painted on the smooth surface, such as glass and plastics boards, without using a brush, and is suitable for making the stained glass. The paint is highly transparent, heat resistant, and weather resistant. It is also suitable for window display, as it can be peeled off. The paint can be used as nail art colors too, because it is in alcohol solvents, thus, harmless to humans.

Since windshield interlayer made of polyvinyl butylal is hardly separated from glass, the windshield is generally shredded and buried in the ground. This technology demonstrates the feasibility of recycling the waste windshield interlayer. This effort shows not only the technological development but also the great significance of the attitude toward the material recycling. We open trial courses for enjoyment and training courses for instructors to popularize the paint.

## Market Impact

In addition to personal use, there is good possibility of industrial application such as production of stained glass windows and lampshades at low cost with short production time.

## ●Social Impact

## Project Background

The interchange between a group of domestic companies, considering a drastic reform, and me drove us to the development of recycled products based on technology transfer.

## Funding History

## Dimple Art Color

2004 Tochigi prefecture subsidy to build up manufacturing technology

## I ntellectual property protection

1. “Paint and seal to generate dimples on film surface” (Patent Application 2005-171220)

2. “Dimple Art” (Trademark No. 4881898 2005/7/22)

Waste windshield interlayer

Sample (Drawing on glass)

## Turning point in the Project

“Original idea.” If we just drew pictures on a paper, which absorbs water, using an ordinal paint brush, we could not have made this development. Drawing pictures on glass and plastics, which hardly absorb water, instead led us to this great success.

For more information, contact : Shiro Ikuta, Collaboration Center for Research and Development, Utsunomiya University, +81-28-689-6321, renkeicd@cc.utsunomiya-u.ac.jp