Aqueous adhesive composition based on polyaldehyde and 2,2′,4,4′-tetrahydroxydiphenyl sulphide
View Patent ↗An aqueous adhesive composition includes: a phenol/aldehyde resin; and an unsaturated elastomer latex. The phenol/aldehyde resin is based on at least: an aromatic polyaldehyde bearing at least two aldehyde functional groups and including at least one aromatic nucleus; and 2,2′,4,4′-tetrahydroxydiphenyl sulphide. The adhesive composition is useable to make a textile material adhere to a crosslinkable rubber composition, and may be used as an advantageous alternative to a formaldehyde-based RFL adhesive.
1. An aqueous adhesive composition comprising:
a phenol/aldehyde resin; and
an unsaturated elastomer latex,
wherein the phenol/aldehyde resin is based on:
2,2′,4,4′-tetrahydroxydiphenyl sulphide, and
wherein the aldehyde in the phenol/aldehyde resin is an aromatic polyaldehyde bearing at least two aldehyde functional groups, the aromatic polyaldehyde including at least one aromatic nucleus.
2. The aqueous adhesive composition according to claim 1 , wherein the at least one aromatic nucleus of the aromatic polyaldehyde is a benzene nucleus.
3. The aqueous adhesive composition according to claim 1 , wherein the at least two aldehyde functional groups are borne by the at least one aromatic nucleus.
4. The aqueous adhesive composition according to claim 3 , wherein the aromatic polyaldehyde is selected from a group consisting of 1,2-benzenedicarboxaldehyde, 1,3-benzenedicarboxaldehyde, 1,4-benzenedicarboxaldehyde, 2-hydroxybenzene-1,3,5-tricarbaldehyde, and mixtures thereof.
5. The aqueous adhesive composition according to claim 4 , wherein the aromatic polyaldehyde is 1,4-benzenedicarboxaldehyde.
6. The aqueous adhesive composition according to claim 1 , wherein the phenol/aldehyde resin includes a basic solvent.
7. The aqueous adhesive composition according to claim 6 , wherein the basic solvent is an aqueous solution having a pH between 9 and 13.
8. The aqueous adhesive composition according to claim 1 , wherein an unsaturated elastomer of the unsaturated elastomer latex is a diene elastomer selected from a group consisting of polybutadienes, butadiene copolymers, polyisoprenes, isoprene copolymers, vinylpyridine/styrene/butadiene terpolymers, and mixtures thereof.
9. The aqueous adhesive composition according to claim 1 , wherein a ratio by weight of the 2,2′,4,4′-tetrahydroxydiphenyl sulphide to the aromatic polyaldehyde is between 0.1 and 3.0.
10. The aqueous adhesive composition according to claim 1 , wherein a content of the phenol/aldehyde resin as dry matter of the adhesive composition is between 5% and 60% by weight of the dry matter of the adhesive composition.
11. The aqueous adhesive composition according to claim 1 , wherein a content of unsaturated elastomer as dry matter of the adhesive composition is between 40% and 95% by weight of the dry matter of the adhesive composition.
12. The aqueous adhesive composition according to claim 1 , wherein a ratio by weight of dry matter corresponding to the phenol/aldehyde resin to dry matter corresponding to the unsaturated elastomer latex is between 0.1 and 2.0.
13. The aqueous adhesive composition according to claim 1 , wherein a water content of the adhesive composition is between 60% and 90% by weight of the aqueous adhesive composition.
14. A textile material coated at least partially with an adhesive layer, the adhesive layer including an adhesive composition comprising:
a phenol/aldehyde resin; and
an unsaturated elastomer latex,
wherein the phenol/aldehyde resin is based on:
2,2′,4,4′-tetrahydroxydiphenyl sulphide, and
wherein the aldehyde in the phenol/aldehyde resin is an aromatic polyaldehyde bearing at least two aldehyde functional groups, the aromatic polyaldehyde including at least one aromatic nucleus.
15. The textile material according to claim 14 , wherein the adhesive composition is an aqueous adhesive composition.
16. The textile material according to claim 14 , wherein the textile material has been dried.
17. The textile material according to claim 14 , wherein the textile material is a material selected from a group consisting of films, monofilaments, multifilament fibres, assemblies of monofilaments or multifilament fibres, and mixtures thereof.
18. The textile material according to claim 14 , wherein the textile material is formed of a substance that includes a thermoplastic polymer.
19. The textile material according to claim 18 , wherein the thermoplastic polymer is an aliphatic polyamide or a polyester.
20. A rubber composite reinforced with a textile material coated at least partially with an adhesive layer, the adhesive layer including an adhesive composition comprising:
a phenol/aldehyde resin; and
an unsaturated elastomer latex,
wherein the phenol/aldehyde resin is based on:
2,2′,4,4′-tetrahydroxydiphenyl sulphide, and
wherein the aldehyde in the phenol/aldehyde resin is an aromatic polyaldehyde bearing at least two aldehyde functional groups, the aromatic polyaldehyde including at least one aromatic nucleus.
21. The rubber composite according to claim 20 , wherein the rubber composite is incorporated in a tire.
22. An adhesive composition comprising:
a phenol/aldehyde resin; and
an unsaturated elastomer latex,
wherein the phenol/aldehyde resin is based on:
2,2′,4,4′-tetrahydroxydiphenyl sulphide, and
wherein the aldehyde in the phenol/aldehyde resin is an aromatic polyaldehyde bearing at least two aldehyde functional groups, the aromatic polyaldehyde including at least one aromatic nucleus.
23. The adhesive composition according to claim 22 , wherein the adhesive composition is in an uncured state.
24. The adhesive composition according to claim 22 , wherein the adhesive composition is in a cured state.