Adhesive layer composition for in-mold decoration
This invention relates to compositions suitable for the formation of an adhesive layer used for in-mold decoration. This invention also relates to in-mold decoration tape or strip, comprising: a carrier layer; a release layer; a durable layer; and an adhesive layer which comprises an adhesive binder, a polymeric particulate material and an inorganic particulate material.
1. An in-mold decoration tape or strip, comprising:
i) a carrier layer;
ii) a release layer;
iii) a durable layer; and
iv) an adhesive layer which comprises an adhesive binder, a polymeric particulate material and an inorganic particulate material, wherein said polymeric particulate material is core-shell particles.
2. The tape or strip of claim 1 , wherein said adhesive binder is selected from the group consisting of polyurethane, acrylics, styrene-butadiene rubber, polybutadiene, polyamides, pyrrolidone copolymers, oxazolidone copolymers, vinylidene chloride copolymers, vinylacetate copolymers, polyesters, and derivatives or blends thereof.
3. The tape or strip of claim 1 , wherein said adhesive binder is a polyurethane, acrylic, or a hybrid thereof.
4. The tape or strip of claim 1 , wherein said adhesive binder is a latex adhesive binder or a hydrocarbon dispersion adhesive.
5. The tape or strip of claim 1 , wherein said adhesive binder takes up about 40% to about 90% by weight of the adhesive layer.
6. The tape or strip of claim 1 , wherein said polymeric particulate material has a glass transition temperature higher than about 45.degree. C.
7. The tape or strip of claim 1 , wherein said polymeric particulate material takes up about 5 to about 50% by weight of the adhesive layer.
8. The tape or strip of claim 1 , wherein said polymeric particulate material is refractive index matched to said adhesive binder.
9. The tape or strip of claim 1 , wherein the difference between refractive indexes of said polymeric particulate material and said adhesive binder is less than about 0.1.
10. The tape or strip of claim 1 , wherein said shell has a glass transition temperature of higher than about 45° C.
11. The tape or strip of claim 1 , wherein said core is refractive index matched to the shell or a blend of the shell and the adhesive binder.
12. The tape or strip of claim 1 , wherein said inorganic particulate material is CaCO 3 , BaSO 4 , silica, glass beads, bentonite, or clay.
13. The tape or strip of claim 1 , wherein said inorganic particulate material takes up about 1 to about 20% by weight of the adhesive layer.
14. The tape or strip of claim 1 , wherein said inorganic particulate material takes up about 3 to about 15% by weight of the adhesive layer.
15. The tape or strip of claim 1 , wherein said adhesive layer further comprising an organic particulate material.
16. The tape or strip of claim 15 , wherein said organic particulate material is a latex material, organic crystals or a solid plasticizer.
17. The tape or strip of claim 1 , wherein said adhesive layer further comprising a second inorganic particulate material.
18. The tape or strip of claim 17 , wherein said first and second inorganic particulate materials are independently CaCO 3 , BaSO 4 , silica, glass beads, bentonite, or clay.
19. The tape or strip of claim 17 , wherein the total concentration of said inorganic particulate material and said second inorganic particulate material is about 5 to about 50% by weight.
20. The tape or strip of claim 1 , wherein said adhesive layer further comprising a solid plasticizer.