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Elastomers for Automotive Air Conditioning Hoses
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English
Abstract
Discussion centers on elastomeric material used for liners in automotive air conditioning systems. The following facts must be taken into consideration:
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the ambient temperatures may reach greater than 120 C
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there will be a move towards R 134a or R 22 as substitutes for the refrigerants now in use.
The three materials that are discussed are NBR, HNBR and CM (an example of heat-resistant elastomers containing chlorine, CM).
HNBR is a heat-resistant alternative to NBR and withstands both R 12 and R 134a.
HNBR has good low-temperature bending behavior. It, therefore, has the widest, most useful temperature range of all the elastomers tested.
Where NBR is in use at present, the introduction of R 134a does not necessitate the use of a different elastomer. However, CM is a more suitable elastomer for R 22.
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Citation
Magg, H., "Elastomers for Automotive Air Conditioning Hoses," SAE Technical Paper 900575, 1990, https://doi.org/10.4271/900575.Also In
References
- Reichelt J. Schlepper H. 1984
- Bayer AG publication 1989
- July 2 1987 89 1987 545
- DuPont de Nemours
- van Amerogen G. J. Diffusion in Elastomers Rub. Chem. Techn. 37 1964 1065
- Jahn H. J.
- Goodyear
- Trexler H. E. Resistance of Polymers to permeation by air conditioning refrigerants and water Rub. Chem. Techn. 56 1983 105