Stabilization of hot melt adhesives

Patent metadata

Field	Value
Publication number	US-11118090-B2
Application number	US-201916713155-A
Country	US
Kind code	B2
Filing date	Dec 13, 2019
Priority date	May 21, 2015
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

The present invention pertains to a stabilized hot melt adhesive containing a) one or more hot melt adhesive materials and b) a stabilizer composition. The one or more hot melt adhesive materials a) include a polyolefin, a styrene-isoprene-styrene block co-polymer, a styrene-butadiene-styrene block co-polymer, a polyacrylate, an acryl-copolymer, an ethylene vinyl acetate, a polyamide, a polyester, a polyurethane, a polyimide, a silane terminated polyolefin, a silane terminated poly-ether, and a silane terminated polyurethane. The stabilizer composition includes a component (B), which is a polymeric sterically hindered amine, and a component (C), which is a specific sterically hindered phenol.

First claim

The invention claimed is:

1. A stabilized hot melt adhesive, comprising a) one or more hot melt adhesive materials selected from the group consisting of a polyolefin, a styrene-isoprene-styrene block co-polymer, a styrene-butadiene-styrene block co-polymer, a polyacrylate, a styrene-ethylene-butadiene-styrene acryl-copolymer, an ethylene vinyl acetate, a polyamide, a polyester, a polyurethane, a polyimide, a silane terminated polyolefin, a silane terminated polyether, and a silane terminated polyurethane; and
b) a stabilizer composition comprising components (B) and (C),
wherein (B) is a polymeric sterically hindered amine selected from the group consisting of:

 wherein n=5−8, and wherein (C) is sterically hindered phenol selected from the group consisting of:

2. The stabilized hot melt adhesive according to claim 1 , wherein the stabilizer composition consists of components (B) and (C).

3. The stabilized hot melt adhesive according to claim 1 , wherein a weight ratio between components (B) and (C) is between 1:5 and 5:1.

4. The stabilized hot melt adhesive according to claim 1 , wherein the component (B) is at least one selected from the group consisting of:

5. The stabilized hot melt adhesive according to claim 1 , wherein the component (B) is:

6. The stabilized hot melt adhesive according to claim 1 , wherein the component (C) is at least one selected from the group consisting of:

7. The stabilized hot melt adhesive according to claim 1 , wherein the component (C) is at least one selected from the group consisting of:

8. The stabilized hot melt adhesive according to claim 1 , wherein the stabilizer composition further comprises:
one or more additives selected from the group consisting of a phosphite, a thioether, a secondary arylamine, a hydroxyl-amine based stabilizer, a UV-absorber, and an inorganic stabilizer.

9. A method of stabilizing a hot melt adhesive against degradation by one or more of light, oxygen and heat, the method comprising:
adding a stabilizer composition to one or more hot melt adhesive materials selected from the group consisting of a polyolefin, a styrene-isoprene-styrene block co-polymer, a styrene-butadiene-styrene block co-polymer, a polyacrylate, a styrene-ethylene-butadiene-styrene acryl-copolymer, an ethylene vinyl acetate, a polyamide, a polyester, a polyurethane, a polyimide, a silane terminated polyolefin, a silane terminated polyether, and a silane terminated polyurethane,
wherein the stabilizer composition comprises components (B) and (C),
wherein (B) is a polymeric sterically hindered amine selected from the group consisting of:

 wherein n=5−8, and wherein (C) is sterically hindered phenol selected from the group consisting of:

10. A stabilized hot melt adhesive, comprising
a) one or more hot melt adhesive materials selected from the group consisting of a polyolefin, a styrene-isoprene-styrene block co-polymer, a styrene-butadiene-styrene block co-polymer, a polyacrylate, a styrene-ethylene-butadiene-styrene acryl-copolymer, an ethylene vinyl acetate, a polyamide, a polyester, a polyurethane, a polyimide, a silane terminated polyolefin, a silane terminated polyether, and a silane terminated polyurethane; and
b) a stabilizer composition comprising components (B) and (C),
wherein (B) is a polymeric sterically hindered amine selected from the group consisting of:

 wherein n=5−8, and wherein (C) is sterically hindered phenol selected from the group consisting of:

11. The stabilized hot melt adhesive according to claim 10 , wherein the stabilizer composition consists of components (B) and (C).

12. The stabilized hot melt adhesive according to claim 10 , wherein a weight ration between components (B) and (C) is between 1:5 and 5:1.

13. The stabilized hot melt adhesive according to claim 10 , wherein the component (B) is at least one selected from the group consisting of:

14. The stabilized hot melt adhesive according to claim 10 , wherein the component (B) is at least one selected from the group consisting of:

15. The stabilized hot melt adhesive according to claim 10 , wherein the component (C) is at least one selected from the group consisting of:

16. The stabilized hot melt adhesive according to claim 10 , wherein the component (C) is at least one selected from the group consisting of:

Assignees

• Basf Se

Inventors

• Hoevel Bernd
• Roser Angelika
• Fischer Claudia
• Martin Heinrich

Classifications

• C09J2493/00

  Presence of natural resin · CPC title

• C09J2491/00

  Presence of oils, fats or waxes · CPC title

• C09J2453/00

  Presence of block copolymer · CPC title

• C09J2423/00

  Presence of polyolefin · CPC title

• C09J2301/304

  the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C · CPC title