Energy curable bonding resin

Patent metadata

Field	Value
Publication number	US-9944833-B2
Application number	US-201214238962-A
Country	US
Kind code	B2
Filing date	Aug 17, 2012
Priority date	Aug 18, 2011
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

An energy curable bonding resin composition that prevents corrosion in metallic optical structures including DVDs includes at least one monomer, acrylated epoxidized soya bean oil, and a photoinitiator of among 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO); Phosphine oxide, phenylbis 2,4,6-trimethyl benzoyl; oligo[2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propanone]; alpha-hydroxy ketone, difunctional; or combinations thereof.

First claim

What is claimed is:

1. An energy curable bonding resin composition to prevent corrosion in bonding metallic optical structures comprising:
at least one monomer;
acrylated epoxidized soya bean oil; and
a photoinitiator selected from among 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO); phosphine oxide, phenylbis 2,4,6-trimethyl benzoyl; oligo[2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propanone]; difunctional alpha-hydroxy ketone, and combinations thereof;
wherein the amount of epoxidized soya bean oil is less than 60% by weight of the resin composition; and wherein at least one photoinitiator is a difunctional alpha-hydroxy ketone; and wherein the bonding resin is an adhesive for bonding the metallic surface of a first optical quality substrate to the metallic surface of a second optical quality substrate; and wherein the bonding resin prevents corrosion of the metallic surfaces of the optical substrates.

2. The resin of claim 1 , further comprising an additive selected from among an adhesion promoter, light stabilizer, de-gassing additive, flow promoter, defoamer, antioxidant, UV stabilizer, surfactant, dispersants, plasticizer, rheological additive, wax, and silicone.

3. The resin of claim 1 , wherein the monomer is selected from among bisphenol A 4 mole ethoxylated diacrylate (BPE4EODA), dipropylene glycol diacrylate (DPGDA), ethoxylated trimethylolpropane ethoxy triacrylate (TMPEOTA), tetrahydrofurfuryl (THF) acrylate, tripropylene glycol diacrylate (TPGDA), neopentylglycol diacrylate (NPGDA), isobornyl acrylate (IBOA), 1,6-hexanediol diacrylate (HDD A), ethoxyethoxyethyl acrylate (EOEOA), 2-phenoxy ethyl acrylate (2-PEA), and combinations thereof.

4. The resin of claim 1 , further comprising an oligomer selected from among urethane acrylates, polyester acrylates, and epoxy acrylates.

5. The resin of claim 1 , further comprising a colorant including an organic pigment, an inorganic pigment, a dye, or a combination thereof.

6. The resin of claim 1 , wherein the amount of the photoinitiator is less than about 6% by weight of the resin composition.

7. The resin of claim 2 , wherein the amount of the additive is less than about 5% by weight of the resin composition.

8. The resin of claim 4 , wherein the amount of the additional oligomer is less than about 25% of the total oligomer content by weight.

9. An assembly for use as an optical recording structure comprising:
a first and a second substrates;
a first metallic layer deposited on the first substrate;
a second metallic layer deposited on the second substrate; and
a cured resin as recited in claim 1 , wherein the second substrate is bonded to the first substrate with the cured resin.

10. An assembly as in claim 9 , wherein the first and the second substrates comprise polycarbonate.

11. An assembly as in claim 9 , wherein the first metallic layer comprises silver.

12. An assembly as in claim 9 , wherein the first metallic layer comprises silver alloy.

13. An assembly as in claim 9 , wherein the second metallic layer comprises aluminum.

14. An assembly as in claim 9 , wherein the optical recording structure exhibits a change in reflectivity after 21 days exposure when placed 6 cm from a 65 W, 10,000K compact fluorescent lamp in a standard laboratory environment that is less than 20% when measuring the R 14H value in accordance with Standard ECMA-267 (ISO/IEC 16448),
wherein the change in reflectivity equals (Maximum R 14H −Minimum R 14H )/(Maximum R 14H ) 100%.

15. A method of making a reliable optical digital recording disc comprising:
providing a first and a second polycarbonate substrates;
depositing a first metallic layer on the first substrate;
depositing a second metallic layer on the second substrate;
bonding the first substrate to the second substrate with an energy curable resin of claim 1 ; and
curing the resin.

16. The method of claim 15 , wherein the first metallic layer comprises silver.

17. The method of claim 15 , wherein the first metallic layer comprises a silver alloy.

18. The method of claim 15 , wherein the second metallic layer comprises aluminum.

19. The method of claim 15 , wherein the curing is performed with actinic radiation.

20. The method of claim 15 , wherein the curing is performed with ultraviolet radiation.

21. The method of 15 , wherein the curing is performed with an electron beam.

22. The method of claim 15 , wherein the curing is performed with infrared radiation.

23. The method of claim 15 , further comprising, measuring a R 14H value of the optical disc in accordance with Standard ECMA-267, wherein change in reflectivity after 21 days exposure when placed 6 cm from a 65 W, 10,000K compact fluorescent lamp in a standard laboratory environment that is less than 20% when measuring the R 14H value in accordance with Standard ECMA-267 (ISO/IEC 16448), is indicative of good perfornlance,
wherein the change in reflectivity equals (Maximum R 14H −Minimum R 14H )/(Maximum R 14H )×100%.

24. A method of manufacturing an energy curable resin composition for use in bonding a metallized optical structure comprising the steps of:
providing a monomer:
dispersing an oligomer of epoxidized soya bean oil with the monomer; and
dispersing a photoinitiator selected from the group consisting of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO); phosphine oxide, phenylbis 2,4,6-trimethyl benzoyl; 0ligo[2-hydroxy-2-methyl-1-[4-(1-ethylvinyl)phenyl]propanone], and Alpha-hydroxy ketone, difunctional with the monomer and epoxidized soya bean oil;
wherein the amount of epoxidized soya bean oil is less than 60% by weight of the resin composition; and wherein at least one photoinitiator is a difunctional alpha-hydroxy ketone; and wherein the bonding resin is an adhesive for bonding the metallic surface of the first optical quality substrate to the metallic surface of a second optical quality substrate; and wherein the bonding resin prevents corrosion of the metallic surfaces of the optical substrates.

25. The method of claim 24 , further comprising, dispersing an additive with the monomer, expoxidised soya bean oil, and the photoinitiator.

26. The method of claim 24 , further comprising dispersing an oligomer among urethane acrylates, polyester acrylates, and epoxy acrylates.

27. The method of claim 24 , further comprising dispersing a colorant into the mixture, wherein the colorant comprises an organic pigment, an inorganic pigment, a dye, or a combination thereof.

28. The method of claim 24 , wherein the monomer is selected from among bisphenol A 4 mole ethoxylated diacrylate (BPE4EODA), dipropylene glycol diacrylate (DPGDA), ethoxylated trimethylolpropane triacrylate (TMPEOTA), tetrahydrofurfuryl (THF) acrylate, tripropylene glycol diacrylate (TPGDA), neopentylglycol diacrylate (NPGDA), isobornyl acrylate (IBOA), 1,6-hexanediol diacrylate (HDDA), ethoxyethoxyethyl acrylate (EOEOA), 2-phenoxy ethyl acrylate (2-PEA), and combinations thereof.

Assignees

• Neddersen Robert
• Sun Chemical Corp

Inventors

• Neddersen Robert

Classifications

• C09J137/00 Primary

  Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a heterocyclic ring containing oxygen (based on polymers of cyclic esters of polyfunctional acids C09J131/00; based on polymers of cyclic anhydrides of unsaturated acids C09J135/00); Adhesives based on derivatives of such polymers · CPC title

• C09J133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• C08L2312/00

  Crosslinking · CPC title

• G11B7/256 Primary

  of layers improving adhesion between layers · CPC title

• Y10T428/31678

  Of metal · CPC title