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US 10,647,893 B2Granted
Aqueous-based polychloroprene contact adhesive
AssigneeBostik SA
InventorsJessie Casimiro, Mélanie Nataf
Life of this patent
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Abstract
Aqueous-based adhesive composition comprising a mixture of polycholorprenes, at least one self-crosslinkable agent of alkyd type and at least one filler, 2) use of such a composition as contact adhesive, 3) multilayer structure assembled with the aid of the adhesive composition 1).
Claims15
An adhesive composition comprising:
- A) from 5 to 40% by dry weight, relative to total dry weight of the adhesive composition, of a mixture of polychloroprenes comprising:
- A1) at least one polychloroprene having a hardness greater than or equal to 80 Shore A;
- and
- A2) at least one polychloroprene having a hardness less than or equal to 60 Shore A;
- B) from 0.5 to 25% by dry weight, relative to total dry weight of the adhesive composition, of at least one self-crosslinkable agent of alkyd type, wherein the at least one self-crosslinkable agent of alkyd type comprises:
- (i) at least one alkyd resin comprising at least one 5-membered cyclocarbonate function (Y), and
- (ii) at least one alkyd resin comprising at least one primary amine function (X) salified by an acid having a pKa ranging from 1 to 14, and having a carbon-based chain comprising from 1 to 6 carbon atoms;
- C) from 10 to 40% by dry weight, relative to total dry weight of the adhesive composition, of at least one mineral filler;
- D) from 0.05 to 3% by dry weight, relative to total dry weight of the adhesive composition, of at least one emulsifier;
- and
- E) water in which said mixture of polychloroprenes is dispersed.
8 more elements
An adhesive composition comprising:
- A) from 5 to 40% by dry weight, relative to total dry weight of the adhesive composition, of a mixture of polychloroprenes comprising:
- A1) at least one polychloroprene having a hardness greater than or equal to 80 Shore A;
- and
- A2) at least one polychloroprene having a hardness less than or equal to 60 Shore A;
- B) from 0.5 to 25% by dry weight, relative to total dry weight of the adhesive composition, of at least one self-crosslinkable agent of alkyd type;
- C) from 10 to 40% by dry weight, relative to total dry weight of the adhesive composition, of at least one mineral filler;
- D) from 0.05 to 3% by dry weight, relative to total dry weight of the adhesive composition, of at least one emulsifier;
- wherein the at least one emulsifier comprises a system of at least two emulsifiers selected from the group consisting of the following emulsifiers:
- oxyethylenated unsaturated acyclic fatty alcohols having an HLB ranging from 15 to 18;
- oxyethylenated unsaturated cyclic fatty alcohols having a cloud point ranging from 63 to 67° C.;
- mixtures of mono- and dialkylphenoxybenzenedisulfonate salts comprising a linear or branched alkyl portion having from 10 to 14 carbon atoms;
- oxyethylenated sulfosuccinic acid and alcohol hemiester salts comprising from 10 to 14 carbon atoms;
- oxyethylenated alkyl ether sulfate salts comprising a linear or branched alkyl portion having from 12 to 14 carbon atoms;
- and
- polyvinyl alcohols;
- and
- has been substituted with E) water in which said mixture of polychloroprenes is dispersed.
14 more elements
Dependencies are inferred from the claim text.