Claims
- 1. A process for incorporating at least one ingredient into a polymer article which comprises the steps of:
- (a) immersing said article in an aqueous media; and
- (b) contacting a surface of the immersed article with a solution of said at least one ingredient in a solvent,
- wherein said aqueous media is non-aggressive towards said article and immiscible with said solvent; and
- wherein both steps are carried out in an environment which avoids escape of any significant amount of said solvent into the atmosphere.
- 2. A process according to claim 1 wherein both steps are carried out in the absence of air.
- 3. A process according to claim 1 wherein said ingredient is a UV stabilizer.
- 4. A process according to claim 1 wherein said polymer is a polyvinyl chloride.
- 5. A process according to claim 1 wherein said process is carried out in a continuous manner on a moving polymer sheet.
- 6. A process according to claim 1 wherein said solvent is a volatile organic solvent.
- 7. A process according to claim 1 wherein said solvent is methylene chloride.
- 8. A process according to claim 1, further comprising a step of displacing any residual solution on the surface of said article, while said article is still in said environment.
- 9. A process according to claim 8 wherein said displacing is carried out with water.
- 10. The process according to claim 1, wherein said polymer is selected from the group consisting of polyvinyl chloride, polyethylene, polypropylene, polystyrene, polycarbonates, thermoplastic polyesters, thermoplastic acrylonitrile/butadiene/styrene copolymers, polyacrylates and polymethacrylates.
- 11. The process according to claim 1, wherein said solvent is 1,2-dichloroethane.
- 12. The process according to claim 1, wherein said ingredient is selected from the group consisting of ultraviolet light stabilizers, antioxidants, anti-static agents, and pigments.
- 13. The process according to claim 1, wherein said ingredient is an ultraviolet light stabilizer present in said solvent in a concentration of about 1 to about 10% by weight.
- 14. The process according to claim 13, wherein said solvent is selected from the group consisting of methylene chloride and 1,2-dichloroethane.
- 15. The process according to claim 14, wherein said polymer is polyvinyl chloride.
- 16. The process according to claim 15, wherein said ultraviolet light stabilizer is selected from the group consisting of 2(2'-hydroxy-5'-t-octylphenyl)benzotriazole, 2(2'-hydroxy-5'-t-methylphenyl)benzotriazole, 2-hydroxy-4-methoxyphenzophenone, 2-hydroxy-4-n-octoxybenzophenone, and 2-ethyl-2-ethoxyanilide.
Parent Case Info
This application is a continuation of application Ser. No. 232,963, filed Aug. 16, 1988, now abandoned, which is a Rule 60 continuation of Ser. No. 945,595, filed Dec. 23, 1986, which issued Sept. 13, 1988 as U.S. Pat. No. 4,770,905.
US Referenced Citations (23)
Foreign Referenced Citations (6)
Number |
Date |
Country |
612206 |
May 1962 |
BEX |
134523 |
Mar 1985 |
EPX |
151961 |
Aug 1985 |
EPX |
2808005 |
Aug 1979 |
DEX |
2808036 |
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DEX |
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ILX |
Non-Patent Literature Citations (1)
Entry |
Katz et al., "Ultraviolet Protection of Transparent PVC Sheets by Diffusion Coatings," Div. Org. Coatings & Plastics, 36(1) pp. 202-206 1976). |
Continuations (2)
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Number |
Date |
Country |
Parent |
232963 |
Aug 1988 |
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Parent |
945595 |
Dec 1986 |
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