Stabilization of hot melt adhesives

Patent metadata

Field	Value
Publication number	US-10563098-B2
Application number	US-201615575395-A
Country	US
Kind code	B2
Filing date	May 19, 2016
Priority date	May 21, 2015
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

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 two or three of a component (A) which is a specific sterically hindered amine, 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, an 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 two or three of components (A), (B) and (C),
wherein the stabilizer composition comprises components (A) and (C) or the stabilizer composition comprises components (A), (B), and (C),
wherein (A) is a sterically hindered amine selected from the group consisting of:

wherein (B) is a polymeric sterically hindered amine selected from the group consisting of:

and
wherein (C) is a sterically hindered phenol selected from the group consisting of:

2. The stabilized hot melt adhesive according to claim 1 , wherein the stabilizer composition comprises components (A) and (C), and
wherein a weight ratio between components (A) and (C) is between 1:5 and 5:1.

3. The stabilized hot melt adhesive according to claim 1 , wherein the stabilizer composition comprises components (A), (B), and (C), and
wherein a weight ratio between components (A), (B) and (C) is between 8:1:1 and 1:8:1 and 1:1:8.

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

5. The stabilized hot melt adhesive according to claim 1 , wherein component (A) is selected from the group consisting of:

6. The stabilized hot melt adhesive according to claim 1 , wherein the stabilizer composition comprises components (A), (B), and (C) and
wherein component (B) is selected from the group consisting of:

7. The stabilized hot melt adhesive according to claim 1 , wherein the stabilizer composition comprises components (A), (B), and (C), and
wherein component (B) is selected from the group consisting of:

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

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

10. 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.

11. 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 two or three of components (A), (B) and (C),
wherein the stabilizer composition comprises components (A) and (C) or the stabilizer composition comprises components (A), (B), and (C),
wherein (A) is a sterically hindered amine selected from the group consisting of:

wherein (B) is a polymeric sterically hindered amine selected from the group consisting of:

wherein (C) is a sterically hindered phenol selected from the group consisting of:

Assignees

• Basf Se

Inventors

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

Classifications

• C09J193/00

  Adhesives based on natural resins; Adhesives based on derivatives thereof · CPC title

• C09J147/00

  Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds; Adhesives based on derivatives of such polymers (C09J145/00 takes precedence; based on conjugated diene rubbers C09J109/00 - C09J121/00) · CPC title

• C08K5/005

  Stabilisers against oxidation, heat, light, ozone · CPC title

• C09J123/16 Primary

  Elastomeric} ethylene-propylene or ethylene-propylene-diene copolymers {, e.g. EPR and EPDM rubbers · CPC title

• C08L91/00 Primary

  Compositions of oils, fats or waxes; Compositions of derivatives thereof · CPC title