Page 182 - Handbook of Adhesion Promoters

8.29 TPO 175

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with energy dispersive x-ray imaging. The interface thickness increased from 23±2 nm to
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28±1 nm upon annealing at 120°C for 30 min. After annealing in the presence of xylene
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vapor, this value increased to 50±4 nm. It should be noted that TPO is a blend of two
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components iPP and EB9 (impact modifier). EB9/adhesion promoter interface width was
similar in magnitude (29±3 nm) to that of TPO/adhesion promoter, whereas the interface
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for iPP/adhesion promoter was significantly narrower (15±2 nm). This suggests that
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adhesion promoter interacts more strongly with the impact modifier than with iPP itself.
A maleic anhydride functionalized ethylene/octene (48 wt%) multi-block copolymer
(2.5 wt%) and xylene (97.5 wt%) were used as an adhesion promoter for TPO to produce
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excellent adhesive properties.
The adhesion promoter composition for TPO comprises amine-containing com-
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pound (dimethylaminoethanol or aminomethylpropanol) in an amount of 1-2 wt%.
REFERENCES
1 Forster, AM; Michaels, CA; Sung, L; Lucas, J, ACS Appl. Mater. Interfaces, 1, 3, 597-603, 2009.
2 Ryntz, RA; Buzdon, B, Prog. Org. Coat., 32, 1-4, 167-72, 1997.
3 Ryntz, RA, Prog. Org. Coat., 27, 1-4, 241-54, 1996.
4 Deng, K; Winnik, MA; Yan, N; Jiang, Z; Yaneff, PV; Ryntz, RA, Polymer, 50, 14, 3225-33, 2009.
5 Yin, Z; Yang, J; Coombs, N; Winnik, MA; Ryntz, RA; Yaneff, PV, Polymer, 48, 5, 1297-1305, 2007.
6 Batra, A; Walton, KL; Dias, PS, WO2013101404, Dow Global Technologies Llc, Jul. 4, 2013.
7 December, TS; Merritt, WH, EP2473570, BASF Coatings GmbH, Jul. 11, 2012.