UV curable lubricant compositions

• US 7,067,462 B2
• Filed: 06/05/2002
• Issued: 06/27/2006
• Est. Priority Date: 12/06/1999
• Status: Expired due to Fees

• Current Assignee: Allied PhotoChemical, Inc.
• Original Assignee: Allied PhotoChemical, Inc.
• Inventors: Krohn, Roy C.
• Primary Examiner(s): Wood, Elizabeth D.
• Application Number:
  US10/164,338
• Publication Number:
  US 20030017954A1
• Time in Patent Office: 1,483 Days
• Field of Search: 508/181, 508/246, 508/421, 508/469, 508/470, 508/471
• US Class Current: 508/181
• CPC Class Codes: C08F 220/1811 C10or C11-(Meth)acrylate, e.g. isodecyl (meth)acrylate, isobornyl (meth)acrylate or 2-naphthyl (meth)acrylate
• CPC Class Codes: C08F 222/102 of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
• CPC Class Codes: C08F 222/1065 of alcohol terminated (poly)urethanes, e.g. urethane(meth)acrylates
• CPC Class Codes: C08F 290/06 Polymers provided for in subclass C08G
• CPC Class Codes: C08F 290/14 Polymers provided for in subclass C08G
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
• CPC Class Codes: C09D 4/06 Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00

Abstract

The present invention discloses an ultraviolet light curable lubricating composition and method for making such a composition that may be used to produce a lubricating layer. The disclosed composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the lubricating layer after curing.

Claims

1. An ultraviolet (UV) curable lubricating composition for forming a coating on a substrate, the lubricating composition comprising:

at least one aliphatic acrylated oligomer, wherein the aliphatic acrylated oligomer is not an epoxy acrylate, a silicon acrylate, or a fluorinate acrylate;

a PTFE composition in an amount of about 15% to 40% of the weight of the lubricating composition; and

a photoinitiator;

wherein the PTFE composition comprises PTFE powder particles with an average particle size from 0.3 μ

m to 30 μ

m and the lubricating composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the coating after the composition is cured and wherein the density of the lubricating composition is from about 6 lb/gallon to about 16 lb/gallon.

2. The UV curable lubricating composition of claim 1, wherein the at least one aliphatic acrylated oligomer is present in an amount of about 10% to 45% of the weight of the lubricating composition.

3. The lubricating composition of claim 2 wherein the aliphatic acrylated oligomer in the mixture is selected from the group consisting of:

a) aliphatic urethane diacrylate diluted 10% by weight with 1,6-hexanediol diacrylate;

b) aliphatic urethane triacrylate diluted 15% by weight with 1,6-hexanediol diacrylate);

c) aliphatic urethane diacrylate blended with 20% by weight tripropylene glycol diacrylate;

d) aliphatic urethane diacrylate blended with 25% by weight ethoxylated trimethylol propane triacrylate;

e) aliphatic urethane diacrylate blended with 19% by weight 2(2-ethoxyethoxy)ethyl acrylate;

f) aliphatic urethane diacrylate blended with 20% by weight tripropylene glycol diacrylate;

g) aliphatic urethane diacrylate blended with 20% by weight tripropylene glycol diacrylate;

h) aliphatic urethane diacrylate blended with 25% by weight tripropylene glycol diacrylate; and

i) aliphatic urethane diacrylate;

j) and mixtures thereof.

4. The UV curable lubricating composition of claim 2, wherein the at least one aliphatic acrylated oligomer is at least one urethane oligomer.

5. The UV curable lubricating composition of claim 2, wherein the mixture further comprises an ethylenically unsaturated monomer.

6. The UV curable lubricating composition of claim 5, wherein the ethylenically unsaturated monomer is present in an amount in an amount of about 15% to 60% of the weight of the lubricating composition.

7. The lubricating composition of claim 5 wherein the ethylenically unsaturated monomer is selected form the group consisting of isobornyl acrylate, isobornyl methacrylate, and mixtures thereof.

8. The UV curable lubricating composition of claim 5 further comprising an acrylated epoxy oligomer.

9. The UV curable lubricating composition of claim 8 further a flow promoting agent.

10. The UV curable lubricating composition of claim 9 wherein:

the acrylated epoxy oligomer is present in an amount of about 2% to 8% of the weight of the lubricating composition;

the photoinitiator is present in an amount of about 2% to 8% of the weight of the lubricating composition; and

a flow promoting agent in an amount of 0.1% to 8% of the weight of the paint composition.

11. The lubricating composition of claim 1 wherein the photoinitiator is selected from the group consisting of:

1-hydroxycyclohexyl phenyl ketone;

propan-1-2-methyl-1-[4-(methylthio)phenyl]-2-morpholino propan-1-one;

the combination of 50% 1-hydroxy cyclohexyl phenyl ketone and 50% benzophenone;

2,2-dimethoxy-1,2-diphenylethan-1-one;

the combination of 25% bis(2,6-dimethoxybenzoyl-2,4-, 4-trimethyl pentyl phosphine oxide and 75% 2-hydroxy-2-methyl-1-phenyl-propan-1-one;

2-hydroxy-2-methyl-1-phenyl-1-propanone;

the combination of 50% 2,4,6-trimethylbenzoyldiphenyl-phosphine oxide and 50% 2-hydroxy 2-methyl-1-phenyl-propan-1-one; and

mixed triaryl sulfonium hexafluoroantimonate salts, mixed triaryl sulfonium hexafluorophosphate salts, and mixtures thereof.

12. The lubricating composition of claim 8 wherein the acrylated epoxy oligomer is selected from the group consisting of:

novolac epoxy acrylate diluted 20% with tripropylene glycol diacrylate;

difunctional bisphenol based epoxy acrylate; and

mixtures thereof.

13. The lubricating composition of claim 1 having a density from about 9 lb/gallon to 13 lb/gallon.

14. The lubricating composition of claim 1 having a viscosity from about 4,000 cps to about 140,000 cps.

15. The lubricating composition of claim 1 having a viscosity from about 70,000 cps to 90,000 cps.