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US 11,939,514 B2Granted
Self-healing water-swellable hydraulic seal
AssigneeDanfoss A/S
InventorsJames Patrick Barnhouse, Aaron David Clark, Kelly Ann Williams
Life of this patent
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Abstract
A self-healing hydraulic seal is provided. The self-healing hydraulic seal is prepared from a water-swellable elastomeric composition comprising a base polymer and a plant-based polysaccharide.
Claims16
A water-swellable elastomeric composition comprising
- (i) 100 pph of a base polymer comprising an acrylonitrile butadiene rubber (NBR);
- (ii) 10-100 pph of a fibrous non-starch plant-based polysaccharide selected from the group consisting of apple fiber, beet fiber, carrot fiber, coir fiber (coconut husk), flax fiber (herbaceous plant), grapefruit fiber, orange fiber, palm fiber, parsnip fiber, rice paper plant fiber (Tetrapanax papyriferus), squash fiber, turnip fiber, and yam fiber, and mixtures and blends thereof;
- (iii) 5-20 pph of a diffusion promoter;
- (iv) 5-20 pph of a fluid retaining agent;
- and
- (v) 5-50 pph of a silica reinforcing filler.
3 more elements
A water-swellable elastomeric composition comprising
- (i) 100 pph of a base polymer comprising an acrylonitrile butadiene rubber (NBR);
- (ii) 10-100 pph of a fibrous non-starch plant-based polysaccharide comprising carrot fiber;
- (iii) 5-20 pph of a diffusion promoter;
- (iv) 5-20 pph of a fluid retaining agent;
- and
- (v) 5-50 pph of a silica reinforcing filler.
3 more elements
Dependencies are inferred from the claim text.