Thermally expandable compositions and use thereof in welding sealer tapes
AssigneeSika Technology AG
InventorsSatoshi URAYAMA, Shunsuke YAMADA
Life of this patent
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Abstract
A thermally expandable composition including at least one solid rubber R, at least on tackifying resin, at least one blowing agent, a vulcanization system, and 0.5-30 wt.-% of fibrous magnesium oxysulphate or carbon fibers or a mixture thereof. Also, a shaped article including a substrate layer composed of the thermally expandable composition, to a method for providing sealing, structural adhesion, baffling, or combination thereof to a structure of a manufactured article, and to use of fibrous magnesium oxysulphate or carbon fibers or a mixture thereof in a thermally expandable composition to improve sag resistance and/or flame resistance properties of said composition.
Claims18
A thermally expandable composition comprising:
- a) at least one solid rubber R,
- b) at least one tackifying resin TR,
- c) at least one blowing agent BA,
- d) a vulcanization system VS, and
- e) 1-30 wt. %, based on the total weight of the thermally expandable composition, of fibrous magnesium oxysulphate, carbon fibers, or a mixture thereof.
A thermally expandable composition that comprises at least one solid rubber, at least one tackifying resin, at least one blowing agent, and a vulcanization system, and further includes at least one of fibrous magnesium oxysulphate and carbon fibers in sufficient amounts to improve the sag resistance and/or flame resistance properties of the thermally expandable composition.
Dependencies are inferred from the claim text.