This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
SMC: Thinner - Smoother - Tougher A New Generation of Low Profile Additives
Annotation ability available
Sector:
Language:
English
Abstract
The automotive industry's need for thinner, smoother and tougher low profile sheet molding compound (SMC) composites for the evolving body panel parts of the 1980s has prompted the development of Union Carbide Low Profile Additives XLP-4514 and XLP-8521. Composites utilizing these additives have provided Class A surface characteristics at 80 mils thickness and above on developmental deck lid tools. Also improved surfaces on commercial parts such as a variety of models of grill opening panels, truck hoods, etc. have been observed. These studies were conducted using computer assisted experimental designs and results-analysis to ensure valid conclusions.
XLP-4514 was engineered for use with modified rigid resins currently employed widely with Union Carbide Low Profile Additive LP-40A. XLP-8521 provides Class A surface with new, proprietary tougher resins as well as yielding composites with both superior surface and composite toughness.
Authors
Citation
Atkins, K., Gandy, R., and Gentry, R., "SMC: Thinner - Smoother - Tougher A New Generation of Low Profile Additives," SAE Technical Paper 810740, 1981, https://doi.org/10.4271/810740.Also In
References
- British Patent 936, 351 September 11 1963 to British Industrial Plastics.
- U.S. Patent 3,503,921 March 1 1970 to Grace W. R.
- Netherlands Patent 70-15386 April 26 1971 to Koppers Company.
- U.S. Patent 3,674,893 July 4 1972 to Dow Chemical Co.
- German Patent 2,252,972 May 24 1973 to Takeda Chemical Company.
- British Patent 936, 351 September 11 1963 to British Industrial Plastics.
- U.S. Patents 3,701,748 3,772,241 to Rohm and Haas.
- Kroekel C. H. Bartkus E. J. “Low Shrink Polyester Resins: Performance and Applications;” 23rd Annual Technical Conference Reinforced Plastics Composites Division, SPI 1968
- Espenshade D. T. Lowry John R. “Low Shrink Polyester Resins for SMC” 29th Annual Technical Conference of the Society of Plastics Engineers 1971
- Atkins K. E. Koleske J. V. Smith P. L. Walter E. R. Matthews V. E. “Mechanism of Low Profile Behavior” 31st Annual Technical Conference Reinforced Plastics Composites Institute, SPI 1976
- Atkins K. E. “Low Profile Behavior,” POLYMER BLENDS 2 Academic Press 1978
- Atkins K. E. Harpold M. A. Com-stock L. R. Smith P. L. “Vinyl Polymers and E-Caprolactone Based Polymers as Low Profile Additives,” 28th Annual Technical Conference Reinforced Plastics Composite Institute, SPI 1973
- Atkins K. E. Gentry R. R. Matthews V. E. Gandy R. C. “Pigmentation and Shrinkage Control in Fiber Reinforced Molding 32nd Annual Technical Conference Reinforced Plastics Composite Institute, SPI 1977
- U.S. Patent 3,718,714 February 27 1973, to Union Carbide Corporation.
- U.S. Patent 3,549,583 December 22 1970, to Union Carbide Corporation.
- U.S. Patent 3,688,178 June 6 1972, to Union Carbide Corporation.
- Atkins K. E. Gentry R. R. Gandy R. C. “New Materials for Standard and Low Density SMC.” Society of the Plastics Industry Press Molders Conference November 1978