Polymer composition and use for making adhesive and article containing it

1. A composition resulting from polymerization, in the presence of a catalyst or initiating system, of at least

(i) a C 4 -C 6 conjugated diene or a C 15 hydrocarbon having at least one olefinic functional group,

(ii) a C 5 olefin mixture,

and optionally

(iii) an optionally substituted vinyl aromatic,

the composition having a glass transition temperature Tg above 35° C., wherein the C 5 olefin mixture contains at least 5 wt % of an olefin mixture comprising (a) 2-methyl-but-2-ene, (b) 2-methyl-but-1-ene and (c) 3-methyl-but-1-ene.

2. The composition according to claim 1 , wherein the C 5 olefin mixture contains at least 5 wt % of an olefin mixture comprising (a) 2-methyl-but-2-ene, (b) 2-methyl-but-1-ene, (c) 3-methyl-but-1-ene and (d) cis-2-pentene and/or trans-2-pentene.

3. The composition according to claim 1 , having a number average molecular mass Mn from 400 to 2400 g/mol, a mass average molecular mass Mw from 900 to 4000 g/mol, a Z-average molecular mass Mz from 1500 to 6000 g/mol, a molecular weight distribution Mw/Mn from 1.50 to 1.90.

4. The composition according to claim 3 , having a number average molecular mass Mn from 600 to 1400 g/mol, a mass average molecular mass Mw from 1000 to 2400 g/mol, and a Z-average molecular mass Mz from 2000 to 4000 g/mol.

5. The composition according to claim 1 , wherein the C 5 olefin mixture contains at least one C 6 olefin chosen among 1-hexene, 2-hexene, 3-hexene, 2-methyl-1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 2-ethyl-1-butene, 2,3-dimethyl-1butene, 2,3 dimethyl-2butene, cyclohexene, 2-methyl-2-pentene, 3-methyl-2-pentene, 3,3-dimethyl-1-butene, 1-methyl-cyclopentene, 3-methyl-cyclopentene, 4-methyl-cyclopentene, methylene-cyclopentane.

6. The composition according to claim 1 , wherein the C 5 olefin mixture contains at least one C 4 olefin chosen among 1-butene, 2-butene, 2-methyl-1-propene.

7. The composition according to claim 1 , wherein the optionally substituted vinyl aromatic is chosen among styrene, alpha-methyl-styrene, a vinyl toluene, a vinyl xylene, a vinyl ethyl benzene, a vinyl ethyl toluene, a vinyl ethyl xylene, a vinyl isopropyl toluene, a vinyl isopropyl xylene, and their mixtures, and wherein the C 4 -C 6 conjugated diene or C 15 hydrocarbon having at least one olefinic functional group is selected from 1,3-butadiene, isoprene, piperylene, 1-methyl-cyclopentadiene, 2-methyl-cyclopentadiene, 5-methyl-cyclopentadiene, α-farnesene, β-farnesene, and their mixtures and their cis and/or trans isomers.

8. The composition according to claim 1 , wherein the catalyst or initiating system is a Lewis acid, or a Friedel-Crafts catalyst.

9. The composition according to claim 8 , wherein the Friedel-Crafts catalyst comprises a metal halide, wherein the metal comprises B, Al, Ti or Sn, and the halide comprises fluoride, chloride or bromide.

10. The composition according to claim 1 , wherein the C 5 olefin mixture is obtained from dehydration of a C 5 alcohol or a C 5 alcohol mixture.

11. The composition according to claim 10 , wherein the C 5 alcohol or C 5 alcohol mixture comes from fermentation from a fusel oil.

12. A tackifying resin comprising a composition according to claim 1 .

13. An adhesive composition comprising the tackifying resin according to claim 12 , and an elastomer.

14. The adhesive composition according to claim 13 , wherein the elastomer is selected from the group consisting of styrene-isoprene block copolymers, polyacrylate resins, poly ethylene vinyl acetate (EVA) resins, poly styrene butadiene resins, random styrene butadiene (SBR) copolymers, styrene butadiene block copolymers, styrene butadiene styrene (SBS) block copolymers, styrene isoprene butadiene styrene (SIBS) copolymers, styrene ethylene propylene styrene (SEPS) copolymers, styrene ethylene butylene styrene (SEBS) block copolymers, amorphous polyolefin (APO) resins, and mixtures thereof.

15. An article comprising a substrate and an adhesive composition according to claim 13 applied to at least one part of at least one surface of the substrate, wherein the substrate is selected from the group consisting of a tape, a label, wood, wood composite, woven or non-woven fabric, paper, cardboard, carton, and a book-binding.

16. A case and carton assembly line comprising an adhesive station, wherein the adhesive station dispenses an adhesive composition according to claim 14 .