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Application of Titanate Coupling Agents in Mineral and Glass Fiber Filled RIM Urethane Systems
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Abstract
Glass fibers are used in RRIM Urethane to provide dimensional stability and good physical properties - particularly impact strength. However, 1/16″ milled glass fibers have the disadvantages of high cost (approximately 82c/lb., anisotropic impact properties and difficult handling and process characteristics. Acicular type fillers, such as Wollastonite, provide tempting substitution possibilities because of lower price, isotropic impact properties and inherent easier handling. However, untreated Wollastonite grades provided inferior properties when compared to silane sized 1/16″ milled fiberglass. Silane treated Wollastonite, G Wollastokup 1100 0.5, has shown promise but falls short in the important area of impact.
This paper will demonstrate that the use of Wollastokup KR TTS 0.5 (22c/lb.) appears to provide equivalent impact while elongation, tear strength, tensile strength and flexural modulus are higher, process viscosity 16% lower and offering a 60c/lb. savings when compared to silane sized 1/16″ milled fiberglass at the 40% loading level (24.1% on total composite) in hydroxyl component.
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Citation
Monte, S., Sugerman, G., Damusis, A., and Patel, P., "Application of Titanate Coupling Agents in Mineral and Glass Fiber Filled RIM Urethane Systems," SAE Technical Paper 820421, 1982, https://doi.org/10.4271/820421.Also In
References
- Bulletin No. KR-0278-7 Rev. #2 Reference Manual, Bibliography, Kenrich Petrochemicals Inc.
- Modern Plastics 1981 58 8 34
- German Patent No. 3038646 1980
- U.S. Patent No. 4,269,756 1981
- Japanese Patent Appl. No. 29530/76
- U.S. Patent No. 4,207,226 1980
- U.S. Patent No. 4,260,406 1981
- Private Communication 1980 Monte S.J. Reinhart, T.J. Jr. Adhesives and Fibrous Matls Br, Nonmetallic Materials Division, Dept. of the Air Force, Air Force Wright Aeronautical Laboratories, Wright-Patterson Air Force Base
- Private Communication 1980 Monte S.J. Reinhart, T.J. Jr.
- Damusis, A. Patel, P. “Titanate Coupling Agents for Use in Polyurethane Systems” Progress Report for the Kenrich Petrochemicals, Inc. 1981
- Monte, S.J. Sugerman, G. “Titanate Coupling Agents - Current Applications (IV)” ACS Rubber Division 1976
- Bulletin TD-79116 Revised 10/1/80 “Spensol L44, Water Dispersed Polyurethane Elastomer”
- Private Communication 1981
- Schwarz, E.G. Critchfield, F.E. Tack-ett L.P. Tarin, P.M. “Silane Effects and Machine Processing in Reinforced High Modulus RIM Urethane Composites” SPI Reinforced Plastics/Composites Institute Paper 14C 1979