Ultraviolet radiation stabilized polymer compositions

• US 4,636,408 A
• Filed: 07/22/1985
• Issued: 01/13/1987
• Est. Priority Date: 01/30/1984
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Anthony, Blair T., Olson, Daniel R.
• Primary Examiner(s): IVY, C WARREN
• Application Number:
  US06/757,699
• Time in Patent Office: 540 Days
• Field of Search: 524/102, 427/160, 427/316, 427/384, 427/402
• US Class Current: 427/160
• CPC Class Codes: C08J 7/065 Low-molecular-weight organic substances, e.g. absorption of additives in the surface of the article
• CPC Class Codes: Y10T 428/8305 Miscellaneous [e.g., treated surfaces, etc.]

Abstract

A process and composition for improving the ultraviolet radiation stability of articles made from resins subject to photo degradation by contacting the article at a selected temperature with a stabilizer composition comprising an ultraviolet radiation absorber and a hindered amine light stabilizer in a nonagressive liquid carrier.

Claims

1. A method for imparting improved ultraviolet radiation stability to an article comprising a member selected from the group of resins consisting of polystyrene resins, acrylonitrile-butadiene-styrene resins, and polyphenylene ether resins which comprises contacting the surface of the article with a stabilizer composition comprising a hindered amine light stabilizer and ultraviolet radiation absorber compound in nonaggressive liquid carrier at a temperature sufficient to effectively impregnate the surface of the article with the hindered amine light stabilizer and the ultraviolet radiation absorber.

2. The method of claim 1 wherein the temperature is between about 60°

C. and the glass transition temperature of the resin.

3. The process of claim 2 wherein the hindered amine light stabilizer is selected from the group consisting of 2-hydroxy-4-dodecylbenzophenone and 2-hydroxy-4-octyloxybenzophenone;

the ultraviolet radiation absorber is selected from the group consisting of bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate and bis(1,2,2,6,6-pentamethyl-4-piperidinyl)sebacate.

4. The process of claim 3 wherein the nonaggressive liquid carrier is selected from the group consisting of hydroxy-ethers, alcohols, mixtures of water and alcohols, liquid aliphatic hydrocarbons, liquid cycloaliphatic hydrocarbons, and chlorofluorocarbons.

5. The method of claim 4 wherein the nonaggressive liquid carrier is selected from the group consisting of acetone and isopropanol.