Modified Polyetheramines in RIM

Abstract

Polyurea RIM, because of its production speed, internal release characteristics, high temperature dimensional stability, and increased resis tance to water absorption is finally coming to the forefront as a better route to producing automotive body panels and fascia. One of the barriers that held back the rapid replacement of polyurethane-urea RIM by this new technology has been the increased reaction rate typically exhibited by polyurea RIM. The throughputs of existing RIM equipment were not high enough to produce some of the larger fascia and body panel parts.

To address this need of some molders to process polyurea RIM in lower throughput RIM machines, we have investigated various modifications of our polyetheramines. Among the modifications investigated were the recently in troduced ketimine technology, N-alkyl substituted polyetheramines and polyether amines having aromatic amine termination. The processing charac teristics and physical properties of some of these slower polyether amines in polyurea RIM formulations will be discussed.

Get full access to this article

View all access options for this article.

References

Grigsby, R.A., Jr. , D.M. Rice and R.J.G. Dominguez . 1987. "Polyurea RIM: Novel Applications and Technical Advances", Proceedings from RETEC '87, Dearborn, MI, November 2-4, 1987 , pp. 66-69.

U.S. Patent 4,609,684.

U.S. Patent 4,794,129.

U.S. Patent 4,789,691.

Grigsby, R.A., Jr. and D.M. Rice. 1986. "Some Recent Advances in Polyurea RIM ", Proceedings of the SPI - 30th Annual TechnicallMarketing Conference, Toronto, Canada, October 1986, pp. 2-5.

Bromberg, M.L. , D.R. Day , H.L. Lee and K.A. Russell. 1986. "New Applications for Dielectric Monitoring and Control", Proceedings of the 2nd Conference of Advanced Composite, Dearborn, MI, November, 1986, pp. 307-311.