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US 5,670,577 AGranted
Waterproof hot melt composition for stitched seams
AssigneeH. B. Fuller Licensing & Financing, Inc.
InventorGlen E. Dawson, Jr.
Life of this patent
Estimating the term…
Abstract
This invention relates to hot melt adhesive compositions useful for waterproofing stitched seams and a method of using the same. This invention particularly relates to certain hot melt adhesives which can be directly applied to a stitched seam such that the resulting seam is resistant to water penetration.
Claims20
A hot melt adhesive composition comprising:
- (a) from about 5 to about 40 percent by weight of an A-B-A block copolymer wherein A is polystyrene and B is a substantially saturated rubbery midblock;
- (b) an amount up to about 15 percent by weight of a substantially A-B diblock copolymer wherein A is polystyrene and B is a rubbery block and said diblock copolymer is a liquid at ambient temperature;
- (c) an amount up to about 20 percent by weight of a waxy material;
- (d) an amount up to about 20 percent by weight of a tackifying resin;
- and
- (e) from about 10 to about 90 percent by weight of a plasticizer;
- wherein said adhesive composition forms a waterproof coating.
4 more elements
A waterproof stitched seam comprising a stitched seam having a plurality of water permeable stitch holes and a hot melt adhesive composition applied molten directly to said seam, said hot melt adhesive comprising:
- (a) from about 5 to about 40 percent by weight of an A-B-A block copolymer wherein A is polystyrene and B is a substantially saturated rubbery midblock;
- (b) an amount up to about 15 percent by weight of a substantially A-B diblock copolymer wherein A is polystyrene and B is a rubbery block;
- (c) an amount up to about 20 percent by weight of a waxy material;
- (d) an amount up to about 20 percent by weight of a tackifying resin;
- and
- (e) from about 10 to about 90 percent by weight of a plasticizer;
- wherein said seam exceeds 20,000 flexes before leakage.
4 more elements
Dependencies are inferred from the claim text.