Farnesene-based tackifying resins and adhesive compositions containing the same

Patent metadata

Field	Value
Publication number	US-10329462-B2
Application number	US-201816053269-A
Country	US
Kind code	B2
Filing date	Aug 2, 2018
Priority date	Jul 31, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A tackifying resin includes a farnesene-based polymer having monomeric units derived from a farnesene monomer and one or more optional comonomers selected from the group consisting of dienes, branched mono-olefins, and vinyl aromatics and has a softening point greater than or equal to 80 degrees Celsius. A method of making the farnesene-based polymer includes combining a farnesene monomer and a solvent and optionally adding one or more comonomers selected from the group consisting of dienes, branched mono-olefins, and vinyl aromatics, to provide a monomer feed, and polymerizing the monomer feed by combining the monomer feed with a Friedel-Crafts catalyst in a vessel. The tackifying resin may be combined with an elastomer to form a hot melt adhesive composition.

First claim

We claim:

1. An adhesive station, wherein the adhesive station dispenses an adhesive composition comprising an elastomer and a tackifying resin,
wherein the tackifying resin is a farnesene polymer derived from monomers comprising farnesene, the farnesene polymer comprising a cyclical structure formed by at least one farnesene monomer bonding to itself, wherein the farnesene monomers are b-farnesene monomers.

2. The adhesive station of claim 1 wherein the farnesene polymer is made according to a method comprising
combining a farnesene monomer and a solvent and optionally adding one or more comonomers selected from the group consisting of dienes, branched mono-olefins, and vinyl aromatics, to provide a monomer feed, and
polymerizing the monomer feed by combining the monomer feed with a Friedel-Crafts catalyst in a vessel.

3. The adhesive station of claim 2 , wherein polymerizing the monomer feed comprises continuously feeding both the monomer feed and the Friedel-Crafts catalyst to the vessel.

4. The adhesive station of claim 2 , wherein the Friedel-Crafts catalyst is selected from the group consisting of BF 3 , AlCl 3 , SnCl 4 , and TiCl 3 .

5. The adhesive station of claim 2 , wherein the Friedel-Crafts catalyst is at least one of AlCl 3 and BF 3 .

6. The adhesive station of claim 5 , wherein the monomer feed includes 0 to 90 mol. % of the comonomer based on the total moles of monomer.

7. The adhesive station of claim 5 , wherein the monomer feed includes 0 to 40 mol. % of the comonomer based on the total moles of monomer.

8. The adhesive station of claim 2 , wherein the Friedel-Crafts catalyst is AlCl 3 .

9. The adhesive station of claim 2 wherein the farnesene polymer has a softening point greater than or equal to 80 degrees Celsius.

10. The adhesive station of claim 2 , wherein the farnesene polymer has a number average molecular weight of 400 to 10,000 g/mol.

11. The adhesive station of claim 2 , wherein the elastomer is selected from the group consisting of styrene-isoprene block copolymers, polyacrylate resins, poly ethylene vinyl acetate (EVA) resins, polystyrene butadiene resins, random styrenebutadiene (SBR) copolymers, styrene-butadiene block copolymers, styrene-isoprene-butadiene-styrene (SIBS) copolymers, styrene-ethylene-propylene-styrene (SEPS) copolymers, styrene-ethylene-butylene-styrene (SEBS) block copolymers, amorphous poly-olefin (APO) resins, and mixtures thereof.

Assignees

• Fina Technology

Inventors

• Nelson Keith A
• Pierre-Justin Anaïs
• Hansen Nestor P

Classifications

• C09J2493/00

  Presence of natural resin · CPC title

• C09J2425/00

  Presence of styrenic polymer · CPC title

• C09J2421/00

  Presence of unspecified rubber · CPC title

• C09J2203/334

  as a label · CPC title

• C09J153/02 Primary

  Vinyl aromatic monomers and conjugated dienes · CPC title