UV curable coating compositions, abrasion resistant UV stabilized thermoplastic composites and method

• US 5,162,390 A
• Filed: 08/07/1991
• Issued: 11/10/1992
• Est. Priority Date: 03/05/1990
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Miranda, Peter M., Tilley, Mark G.
• Primary Examiner(s): McCamish, Marion E.
• Assistant Examiner(s): LUSIGNAN, MICHAEL R
• Application Number:
  US07/741,695
• Time in Patent Office: 461 Days
• Field of Search: 522/64, 522/84, 522/91, 522/99, 522/38, 522/85, 522/75
• US Class Current: 522/64
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: C08F 220/00 Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
• CPC Class Codes: C08K 5/5397 Phosphine oxides
• CPC Class Codes: C08L 2666/28 Non-macromolecular organic substances
• CPC Class Codes: C09D 183/04 Polysiloxanes
• CPC Class Codes: C09D 183/10 Block or graft copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C09D151/08, C09D153/00
• 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 7/48 Stabilisers against degradation by oxygen, light or heat
• CPC Class Codes: C09D 7/63 organic
• CPC Class Codes: Y10T 428/31507 Of polycarbonate

Abstract

Organophosphorus compounds capable of being activated with light at from 360 nm to about 410 nm, such as, an acylphosphine oxide, have been found useful as photoinitiators for effecting the cure of various UV curable coating compositions, such as a UV curable organic material in the presence of up to 20% by weight of a UV absorber. UV stabilized thermoplastic composites of films, sheets, or laminates having thickness of up to an inch or more with improved optical clarity also are provided.

Claims

1. A UV curable coating composition consisting essentially of by weight

(A) 100 parts of a mixture of a UV curable polyfunctional acrylate, and a UV curable hydrolysis product of silylacrylate and arqueous colloidal silica,

(B) 0.3 to 10 parts of an acylphosphine oxide which is effective for polymerizing the UV curable organic coating composition with light having a wavelength of from about 360 nm to about 410 nm and

(C) a UV absorber, where the UV absorber is used in the UV curable coating composition in an amount which is sufficient to provide a weight ratio of acylphosphine oxide to UV absorber having a value of about 0.04 to about 0.3.

2. A UV curable coating composition in accordance with claim 1, where the acylphosphineoxide is 2,4,6-trimethylbenzoyldiphenylphosphine oxide.

3. A UV curable coating composition in accordance with claim 1, where the UV absorber is 2-(2-hydroxy-5-octylphenylbenzotriazole.

4. A UV curable coating composition in accordance with claim 1, where the UV absorber is 2-hydroxy-4-n-octoxybenzophenone.

5. A UV curable coating composition in accordance with claim 1 where the polyfunctional acrylate is hexanediol diacrylate.