Process for improving weather resistant adhesion of a coating to glass surface

• US 4,496,611 A
• Filed: 09/23/1982
• Issued: 01/29/1985
• Est. Priority Date: 01/29/1980
• Status: Expired due to Fees

• Current Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
• Original Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
• Inventors: Kawakubo, Fumio, Hirose, Toshifumi, Isayama, Katsuhiko, Hosaka, Miyako, Minokami, Tadashi
• Primary Examiner(s): Lusignan, Michael R.
• Application Number:
  US06/422,162
• Time in Patent Office: 859 Days
• Field of Search: 427/160, 427/165, 427/389.7, 427/386, 427/387, 427/407.2, 523/435, 523/454, 525/1, 525/476, 525/523, 428/419, 428/426, 428/425.5, 428/428, 428/447
• US Class Current: 427/160
• CPC Class Codes: C09D 5/32 Radiation-absorbing paints protection against X-, gamma- or corpuscular radiation G21F
• CPC Class Codes: C09J 2400/146 in the pretreated surface to be joined
• CPC Class Codes: C09J 5/02 involving pretreatment of the surfaces to be joined
• CPC Class Codes: Y10T 428/31533 Of polythioether
• CPC Class Codes: Y10T 428/31598 Next to silicon-containing [silicone, cement, etc.] layer
• CPC Class Codes: Y10T 428/31612 As silicone, silane or siloxane
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

A method of improving weather resistant adhesion of curable composition on a glass surface, encompassing use of a primer composition utilizable on glass surfaces, comprising a film forming component and an ultraviolet light absorbing component, and capable of shielding light having wavelengths of 380 nm or less. The primer composition protects curable compositions coated on top of the primer from adverse weather effects, such as on adhesion properties of the curable composition onto a glass surface, the adhesion being maintained for substantially long periods of time.

Claims

1. A process for improving the weather resistant adhesion of a cured coating to a glass surface, which process consists of the steps of coating a primer composition comprising a film forming component and an ultraviolet light absorbing component, onto a glass surface to form a film capable of substantially shielding light having a wavelength of 380 nm or less;

and thereafter, coating a curable composition on top of said primer film;

wherein said curable composition is a sealant selected from the group consisting of a modified silicone type sealant, a urethane type sealant, and a polysulfide type sealant; and

wherein said ultraviolet light absorbing component comprises 0.5 to 35 weight percent; and

wherein said film forming component is selected from the group consisting of silicon modified diallyl phthalate prepolymer, silicon modified epoxy resin, silicon modified acrylic polymer and mixtures thereof.

2. The method of claim 1, wherein said ultraviolet light absorbing component comprises 3 to 35 weight percent.

3. The method of claim 1, wherein said ultraviolet light absorbing component comprises 3 to 30 weight percent.