Cohesive products

• US 6,156,424 A
• Filed: 10/31/1997
• Issued: 12/05/2000
• Est. Priority Date: 10/31/1997
• Status: Expired due to Term

• Current Assignee: Andover Healthcare Incorporated (Milliken & Company)
• Original Assignee: Andover Coated Products Incorporated
• Inventors: Taylor, Paul
• Primary Examiner(s): Cole, Elizabeth M.
• Application Number:
  US08/961,801
• Time in Patent Office: 1,131 Days
• Field of Search: 442/59, 442/149, 428/343, 428/355 R, 427/207.1, 427/208.4, 528/480
• US Class Current: 428/355.00R
• CPC Class Codes: A61L 15/585 Mixtures of macromolecular compounds
• CPC Class Codes: C08L 11/00 Compositions of homopolymers or copolymers of chloroprene
• CPC Class Codes: Y10T 428/2852 Adhesive compositions
• CPC Class Codes: Y10T 442/20 Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer

Abstract

A cohesive product that has one or more layers of a substrate and a synthetic water-based cohesive polymer that is applied to the substrate and defines an outer surface of the product. The synthetic water-based cohesive polymer is an inherently crystalline elastomer whose polycrystalline structure has been disrupted such that the elastomer possesses a cohesive property.

Claims

1. A cohesive product comprising a substrate and a synthetic water-based cohesive, said water-based cohesive comprising (a) an elastomer having an inherently crystalline structure and defining at least one outer surface of the product and selected from the group consisting of polychloroprene, polyester polyurethane, and polycaprolactone polyurethane, and (b) two tackifying resins with melting points higher and lower relative to one another in an amount effective to disrupt the crystalline structure of the elastomer, maintaining the elastomer in a partial polycrystalline state such that the elastomer possesses a cohesive property.

2. A cohesive product comprising a substrate and a synthetic water-based cohesive, said water-based cohesive comprising (a) an elastomer having an inherently crystalline structure and defining at least one outer surface of the product and selected from the group consisting of polychloroprene, polyester polyurethane, and polycaprolactone polyurethane, and (b) two tackifying agents with average molecular weights higher and lower relative to one another in an amount effective to disrupt the crystalline structure of the elastomer and to maintain the elastomer in a partial polycrystalline state such that the elastomer possesses a cohesive property.

3. A cohesive product comprising a substrate and a synthetic water-based cohesive defining at least one outer surface of the product, wherein the synthetic water-based cohesive comprises an elastomer having an inherently crystalline structure and consists essentially of polychloroprene, polyester polyurethane, or polycaprolactone polyurethane, and at least one tackifying agent in an amount effective to disrupt the crystalline structure of the elastomer and maintain the elastomer in a partial polycrystalline state such that the elastomer possesses a cohesive property.

4. A cohesive product comprising a substrate and a synthetic water-based cohesive defining at least one outer surface of the product, wherein the synthetic water-based cohesive comprises an elastomer having an inherently crystalline structure and is selected from the group consisting of polychloroprene, polyester polyurethane, and polycaprolactone polyurethane, and at least one tackifying agent in an amount effective to disrupt the crystalline structure of the elastomer and maintain the elastomer in a partial polycrystalline state such that the elastomer possesses a cohesive property.

5. A method of modifying cohesiveness of a synthetic water-based elastomer inherently capable of crystallization, wherein the elastomer consists essentially of polychloroprene, polyester polyurethane, or polycaprolactone polyurethane by:

(1) combining the synthetic water-based elastomer with at least one tackifying agent to produce a dispersion/emulsion of the elastomer and tackifying agent(s), the tackifying agents being present in the dispersion/emulsion in an amount effective to disrupt the crystalline structure of the elastomer an maintain the elastomer in a partial polycrystalline state; and

(2) evaporating the water from the dispersion/emulsion to produce a cohesive elastomeric solid.

6. A method of making a synthetic cohesive product comprising the steps of:

(1) combining a synthetic, inherently crystalline elastomer, wherein the elastomer consists essentially of polychloroprene, polyester polyurethane, or polycaprolactone polyurethane with at least one tackifying agent to produce an emulsion/dispersion of the elastomer and tackifying agent(s);

(2) providing a substrate of a desired structure;

(3) treating the substrate with the dispersion/emulsion such that the dispersion/emulsion defines at least one outer surface of the product; and

(4) evaporating water from the dispersion/emulsion to produce a cohesive elastomeric solid.