Multilayer material, process of preparation and applications
First Claim
1. A multilayer polymer material, which comprises:
- at least one continuous layer A composed of a gel which is irreversible as a function of the temperature, which comprises at least one active chemical substance x, a structuring polymer c, a crosslinking agent ic selected from the group consisting of aldehydes, dialdehydes, and prepolymers containing isocyanate functional groups, and a solvent sa; and
at least two barrier layers E which comprise a synthetic elastomer e, said layers A and E being held together by;
a polymeric bonding agent y incorporated in at least one of said layers A or E.
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Abstract
Multilayer elastomer films (multilayer material) comprising at least one continuous layer, carrying an active chemical substance (such as corrosion inhibitors, lubricants or alternatively biocides for medical use), inserted between inert elastomer barrier layers, processes for the preparation and various applications of these films. The multilayer polymeric material comprises at least one layer A composed of a gel which is reversible or non-reversible, as a function of the temperature, and which carries at least one active chemical substance x, and at least two barrier layers E comprising a synthetic elastomer e, the said layers being held together by a polymeric bonding agent y incorporated in at least one of the said layers A or E and/or by an independent bonding layer Z comprising a polymer z and/or by a chemical or physical treatment of at least one of the said layers A or E.
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Citations
42 Claims
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1. A multilayer polymer material, which comprises:
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at least one continuous layer A composed of a gel which is irreversible as a function of the temperature, which comprises at least one active chemical substance x, a structuring polymer c, a crosslinking agent ic selected from the group consisting of aldehydes, dialdehydes, and prepolymers containing isocyanate functional groups, and a solvent sa; and
at least two barrier layers E which comprise a synthetic elastomer e, said layers A and E being held together by;
a polymeric bonding agent y incorporated in at least one of said layers A or E.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
(i) polymers containing both at least one poly A sequence compatible with the layer A and at least one poly E sequence compatible with the layer E which are selected from the group consisting of;
di-block copolymers of formula poly A-block-poly E, tri-block copolymers of formulas poly E-block-poly A-block-poly E (EAE), poly A-block-poly E-block-poly A (AEA), poly A-block-poly E-block-poly F (AEF) or poly A-block-poly F-block-poly E (AFE), and grafted copolymers of formulas poly A-grafted-poly E, poly E-grafted-poly A, or poly A-grafted-poly E and -poly F, it being possible for the poly F sequence to be compatible with the layer A or with the layer E.
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13. The multilayer material according to claim 1, wherein the gel layer A comprises:
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between 0 and 98% of solvent sa with respect to the gel, between 0.1 and 74% of structuring polymer c with respect to the gel, between 1 and 80% of the active chemical substance x with respect to the gel, and between 0.0001 and 0.1% by weight of crosslinking agent ic per combined other constituents.
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14. The multilayer material according to claim 13, wherein said gel layer A comprises between 25% and 98% of the solvent sa with respect to the gel.
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15. The multilayer material according to claim 13, wherein said gel layer A comprises between 1% and 74% of the structuring polymer c with respect to the gel.
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16. The multilayer material according to claim 13, wherein said gel layer A comprises between 1% and 74% of the active chemical substance x with respect to the gel.
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17. The multilayer material according to claim 13, wherein, when the gel layer A additionally comprises a bonding agent y, the proportions by weight of the latter are between 0.01 and 25% with respect to the gel, the proportions of solvent sa being consequently adjusted.
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18. The multilayer material according to claim 1, wherein the elastomer layers E comprise a synthetic elastomer e selected from the group consisting of polybutadiene, polyisoprene, an acrylic polymer, polychloroprene, polyurethane, a chlorobutadiene-methacrylic acid copolymer, an ethylene vinyl acetate copolymer, a styrene butadiene rubber (SBR) copolymer, a styrene-butadiene-styrene (SBS) copolymer, a styrene-isoprene-styrene (SIS) copolymer and a styrene-ethylene-butylene-styrene (SEBS) copolymer, and said polymeric bonding agent y is incorporated into said layers E.
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19. A glove coated with a multilayer material according to claim 1.
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20. A fingerstall coated with a multilayer material according to claim 1.
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21. A condom coated with a multilayer material according to claim 1.
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22. A multilayer polymer material, which comprises:
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(a) at least one continuous layer A composed of a gel which is irreversible as a function of the temperature, which comprises at least one active chemical substance x, a structuring polymer c, a crosslinking agent ic and a solvent sa; and
(b) at least two barrier layers E which comprise a synthetic elastomer e, said layers A and E being held together by a polymeric bonding agent y incorporated in at least one of said layers A or E;
wherein the bonding agent y is selected from the group consisting of;
(i) polymers containing both at least one poly A sequence compatible with the layer A and at least one poly E sequence compatible with the layer E which are selected from the group consisting of;
(a) di-block copolymers of formula poly A-block-poly E;
(b) tri-block copolymers of formulas poly E-block-poly A-block-poly E (EAE), polyA-block-poly E-block-polyA (AEA), poly A-block E-block poly F (AEF) or poly A-block-poly F-block-poly E (AFE); and
(c) grafted copolymers of formulas poly A-grafted-poly E, poly E-grafted-poly A, or poly A-grafted-poly E and -poly F, it being possible for the poly F sequence to be compatible with the layer A or with E;
wherein the poly A sequences are selected from the group consisting of polyoxyethylene, polyvinylpyridine, poly(acrylic acid)s, polyvinyl alcohol and quaternized polyvinylpyridine and the poly E sequences are selected from the group consisting of polydienes, polyolefins, polyoxypropylene and polydimethylsiloxane.- View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
between 0% and 98% of the solvent sa with respect to the gel, between 0.1% and 74% of the structuring polymer c with respect to the gel. between 1% and 80% of the active chemical substance x with respect to the gel, and between 0.0001% and 0.1% by weight of crosslinking agent ic per combined other constituents.
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35. The multilayer material according to claim 34, wherein said gel layer A comprises between 25% and 98% of the solvent sa with respect to the gel.
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36. The multilayer material according to claim 34, wherein said gel layer A comprises between 1% and 74% of the structuring polymer c with respect to the gel.
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37. The multilayer material according to claim 34, wherein said gel layer A comprises between 1% and 74% of the active chemical substance x with respect to the gel.
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38. The multilayer material according to claim 34, wherein, when the bonding agent y is incorporated in the gel layer A the proportions by weight of said bonding agent y are between 0.01 and 25% with respect to the gel, the proportions of solvent sa being consequently adjusted.
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39. The multilayer material according to claim 22, wherein the elastomer layers E comprise a synthetic elastomer e selected from the group consisting of polybutadiene, polyisoprene, acrylic polymers, polychloroprene, polyurethane, chlorobutadiene-methacrylic acid copolymers, ethylene-vinyl acetate copolymers, styrene butadiene rubber (SBR) copolymers, styrene-butadiene-styrene (SBS) copolymers, styrene-isoprene-styrene (SIS) copolymers, styrene-ethylene-butylene-styrene (SEBS) copolymers, and said polymeric bonding agent y is incorporated into said layers E.
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40. A glove coated with a multilayer material according to claim 22.
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41. A fingerstall coated with a multilayer material according to claim 22.
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42. A condom coated with a multilayer material according to claim 22.
Specification