Thermally crosslinkable composition

Patent metadata

Field	Value
Publication number	US-11739239-B2
Application number	US-201816490127-A
Country	US
Kind code	B2
Filing date	Jul 10, 2018
Priority date	Jul 11, 2017
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

The present invention relates to a thermally crosslinkable composition comprising an acid-modified polymer A having a melting point of 110 to 150° C. and a crystallization temperature of 50 to 90° C., an acid-modified polymer B having a melting point of 30 to 110° C. and a crystallization temperature of lower than 50° C., a tackifier resin, and a curing agent, wherein the thermally crosslinkable composition has a crystallization temperature of 30 to 70° C.

First claim

The invention claimed is:

1. A thermally crosslinkable composition comprising an acid-modified olefin-based polymer A containing 20 to 90% by mass of structural units derived from propylene, 1 to 60% by mass of structural units derived from 1-butene, and 0.1 to 10% by mass of structural units derived from ethylene and having a melting point of 110 to 150° C. and a crystallization temperature of 50 to 90° C., an acid-modified olefin-based polymer B containing 55% to 95% by mass of structural units derived from propylene and having a melting point of 30 to 110° C. and a crystallization temperature of lower than 50° C., a tackifier resin, and a curing agent, wherein the thermally crosslinkable composition has a crystallization temperature of 30 to 70° C.

2. The thermally crosslinkable composition according to claim 1 comprising 30 to 200 parts by mass of the acid-modified olefin-based polymer B based on 100 parts by mass of the acid-modified olefin-based polymer A, and 20 to 200 parts by mass of the tackifier resin and 0.2 to 3 parts by mass of the curing agent based on 100 parts by mass of a total amount of the acid-modified olefin-based polymers A and B.

3. The thermally crosslinkable composition according to claim 1 , wherein a content of the tackifier resin having an acid value of 5 or less is 20 to 100% by mass based on 100% by mass of a whole tackifier resin.

4. The thermally crosslinkable composition according to claim 3 , wherein the tackifier resin having an acid value of 5 or less is selected from the group consisting of rosin resins, terpene resins and petroleum resins.

5. The thermally crosslinkable composition according to claim 1 , wherein the curing agent is a solid polyamine compound having a melting point of 150° C. or higher.

6. The thermally crosslinkable composition according to claim 5 , wherein the solid polyamine compound having a melting point of 150° C. or higher is a hydrazide-based polyamine.

7. The thermally crosslinkable composition according to claim 1 , further comprising an acid-unmodified thermoplastic resin.

8. The thermally crosslinkable composition according to claim 7 , wherein the acid-unmodified thermoplastic resin is an acid-unmodified styrene-containing thermoplastic elastomer.

9. The thermally crosslinkable composition according to claim 1 , further comprising a solvent.

10. A hot melt adhesive comprising the thermally crosslinkable composition according to claim 1 .

11. A film adhesive comprising the thermally crosslinkable composition according to claim 1 .

12. An adhesive for adherent surface material, wherein the adhesive comprises the thermally crosslinkable composition according to claim 1 .

13. An adherent surface material comprising the adhesive according to claim 12 .

14. An automotive interior component comprising the adherent surface material according to claim 13 and a polyolefin substrate.

15. An architectural interior material comprising the adherent surface material according to claim 13 and the polyolefin substrate.

Assignees

• Sunstar Engineering Inc

Inventors

• Zhang Yanmei

Classifications

• C09J123/0869 Primary

  Acids or derivatives thereof · CPC title

• C08K5/0025

  Crosslinking or vulcanising agents; including accelerators · CPC title

• C08K5/01

  Hydrocarbons {(C08K5/0091 takes precedence)} · CPC title

• C08K5/28

  Azides · CPC title

• C09J7/35

  Heat-activated · CPC title