Joint sealant

• US 5,130,176 A
• Filed: 07/16/1990
• Issued: 07/14/1992
• Est. Priority Date: 08/08/1989
• Status: Expired due to Term

• Current Assignee: Emseal, LLC
• Original Assignee: Konrad Baerveldt
• Inventors: Baerveldt, Konrad
• Primary Examiner(s): Hess, Bruce H.
• Assistant Examiner(s): MULVANEY, ELIZABETH EVANS
• Application Number:
  US07/553,725
• Time in Patent Office: 729 Days
• Field of Search: 428/306.6, 428/308.4, 428/314.4, 428/316.6, 428/317.1, 428/322.7, 428/57, 428/58, 428/192, 428/218, 52/309.6, 52/396, 52/404, 52/573
• US Class Current: 428/192
• CPC Class Codes: B32B 2250/22 All layers being foamed
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2266/0235 Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 2266/0278 Polyurethane
• CPC Class Codes: B32B 2266/08 Closed cell foam
• CPC Class Codes: B32B 2317/22 Natural rubber synthetic rubber B32B2319/00
• CPC Class Codes: B32B 2319/00 Synthetic rubber natural rubber B32B2317/22
• CPC Class Codes: B32B 2581/00 Seals; Sealing equipment; Gaskets
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: B32B 5/32 at least two layers being foamed and next to each other
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: E04B 1/6812 Compressable seals of solid form
• CPC Class Codes: F16J 15/022 characterised by structure or material
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/24992 Density or compression of components
• CPC Class Codes: Y10T 428/249955 Void-containing component partially impregnated with adjacent component
• CPC Class Codes: Y10T 428/249958 Void-containing component is synthetic resin or natural rubbers
• CPC Class Codes: Y10T 428/249976 Voids specified as closed
• CPC Class Codes: Y10T 428/249981 Plural void-containing components
• CPC Class Codes: Y10T 428/249982 With component specified as adhesive or bonding agent
• CPC Class Codes: Y10T 428/249999 : Differentially filled foam, filled plural layers, or filled layer with coat of filling material

Abstract

A sealant strip includes at least three layers of foam coated on one side edge with a waterproof elastomer. The strip is arranged as two outer layers sandwiching an inner layer. The outer layers are substantially equally compressible, and the inner layer is compressible to a different degree than the outer layers. When the outer edge of said strip is coated with said elastomer and then said strip compressed, said coating will tend to fold along the interfaces between the layers of foam.

Claims

1. A sealant strip including at least three layers of foam arranged as two outer layers formed from an open cell foam impregnated with adhesive and at least one inner layer formed from a closed cell foam, the outer layers being substantially equally compressible, and the inner layer being less compressible than the outer layers, one edge of said strip being coated with a waterproof elastomer and said strip being compressed, such that said coating is folded along interfaces between the layers of foam.

2. A sealant strip as claimed in claim 1, including an odd number of said layers greater than three, with alternating layers being said open cell foam impregnated with adhesive and with layers intermediate the open cell foam being said closed cell foam.

3. A sealant strip as claimed in claim 2, wherein said open celled foam is chosen from the group including polyurethane, polyvinyl copolymers, natural or synthetic rubbers and viscose sponges.

4. A sealant strip as claimed in claim 3, wherein said elastomeric compound is selected from the group including RTV vulcanizing silicone rubbers, polyurethanes, acrylics, vinyls, synthetic and natural rubbers, polysulphates, thermo-plastics, thermo-rubber and polymers and copolymers of the foregoing.

5. A sealant strip as claimed in claim 3, wherein said adhesive is selected from the group including chlorinated paraffin waxes, natural and synthetic waxes, acrylics, latexes, styrenes, vinyls, bitumens, natural and synthetic resins, and copolymers of the foregoing.