Process for coating an optical material and the resulting product

• US 3,900,672 A
• Filed: 04/04/1973
• Issued: 08/19/1975
• Est. Priority Date: 04/04/1973
• Status: Expired due to Term

• Current Assignee: Fumio Onoki, Hajime Kamiya, Kazuaki Ohno, Peter Norgate, Vivan Joseph Hammond
• Original Assignee: Fumio Onoki, Hajime Kamiya, Kazuaki Ohno, Peter Norgate, Vivan Joseph Hammond
• Inventors: Kamiya, Hajime, Hammond, Vivan Joseph, Norgate, Peter, Onoki, Fumio, Ohno, Kazuaki
• Primary Examiner(s): Husack, Ralph
• Assistant Examiner(s): Childs, Sache L.
• Application Number:
  US05/347,824
• Time in Patent Office: 867 Days
• Field of Search: 117/33.3,124D,124F,161ZA,161UZ,138.8A,101 106/2,13 260/33.4R,33.4PQ
• US Class Current: 428/334
• CPC Class Codes: C08K 5/34 Heterocyclic compounds having nitrogen in the ring
• CPC Class Codes: C08K 5/54 Silicon-containing compounds C08K5/0091 takes precedence
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 2666/28 Non-macromolecular organic substances
• CPC Class Codes: C08L 33/02 Homopolymers or copolymers of acids; Metal or ammonium salts thereof
• CPC Class Codes: C08L 61/20 Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen with aminophenols C08L61/04
• CPC Class Codes: C08L 71/00 Compositions of polyethers obtained by reactions forming an ether link in the main chain of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06; Compositions of derivatives of such polymers
• CPC Class Codes: C09D 133/02 Homopolymers or copolymers of acids; Metal or ammonium salts thereof
• CPC Class Codes: Y10T 428/263 Coating layer not in excess of 5 mils thick or equivalent
• CPC Class Codes: Y10T 428/31612 As silicone, silane or siloxane

Abstract

A process for improving the property of the surface of an optical material by coating the surface with a mixture comprising 25 to 70% by weight of polyacrylic acid, 0.5 to 10% by weight of hexamethoxy methylmelamine, 0.1 to 2% by weight of aminopropyltriethoxysilane 0.01 to 0.1% by weight of polyethylene glycol fatty acid ester and 25 to 75% by weight of a solvent, drying and hardening the coating at a temperature of 50*C to 150*C.

Claims

1. A PROCESS FOR IMPROVING THE PROPERTY OF THE SURFACE OF AN OPTICAL MATERIAL BY PROVIDING A COATING MIXTURE COMPRISING 25 TO 70% BY WEIGHT OF POLYACRYLIC ACID, 0.5 TO 10% BY WEIGHT OF HEXAMETHOXYMETHYLMELAMINE, 0.1 TO 2% BY WEIGHT OF YAMINOPROPYL TRIETHOXYSILANE, 0.01 TO 0.1% BY WEIGHT OF POLYETHYLENE GLYCOL FATTY ACID ESTER AND 25 TO 75% BY WEIGHT OF A SOLVENT SELECTED FROM THE GROUP CONSISTING OF 2-ETHOXYETHANOL, ETHYL ALCOHOL, ETHYLENE GLYCOL, MONOETHYL ETHER AND A MIXED SOLUTION OF TWO OR MORE HEREOF, BASED ON THE WEIGHT OF THE MIXTURE, THE SUM OF THE PERCENTAGES BEING 100%, COATING THE SURFACE OF THE OPTICAL MATERIAL WITH SAID MIXTURE BY A SPINNING METHOD AND DRYING AND HARDENING THE COATING AT A HEATING TEMPERATURE OF 50*C TO 150*C TO FORM A COATING HAVING A THICKNESS OF 10UTO 1,000U.

2. The optical material improved by the process according to claim 1.