EP0424645A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Radiation curable transparent coating compositions containing basic colloidal silica
Assignee: Dow Silicones Corp
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Filing: 1990-09-04
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Granted: —
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Expires: 2010-09-04
Abstract
Abstract What is disclosed is a process of improving the transparency of cured abrasion resistant coating compositions when basic dispersions of colloidal silica are used. The process involves adding organic acid to either basic dispersions of colloidal silica prior to combining with a mixture containing a Michael adduct or to a mixture containing a Michael adduct prior to combining with basic dispersions of colloidal silica.
Inventors
- 👤 Anthony Revis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 19:25
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/02; C09D4/00; C09D139/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
139 words
A process for incorporating basic colloidal silica into a transparent abrasion resistant coating comprising (I) reacting (A) at least one multifunctional acrylate monomer with, (B) the reaction product of (i) at least one multifunctional acrylate monomer of (A) and, (ii) an amino-organofunctional silane of the formula X a Si{Q(NHQ′) b NZH} 4-a wherein: X is selected from alkoxy groups having 1-6 carbon atoms; Q and Q′ are the same or different divalent hydrocarbon groups; Z is a hydrogen or a monovalent hydrocarbon group; a is an integer from 1 to 3; b is an integer from 0 to 6; and thereafter, (II) mixing the product of (I) with components comprising (C) a basic dispersion of colloidal silica, and (D) an organic acid of the formula RCOOH wherein R is a monovalent hydrocarbon having from 2 to 8 carbon atoms.
Claim 2
Dependent Claim
139 words
A process for incorporating basic colloidal silica into a transparent abrasion resistant coating comprising (I) reacting (A) at least one multifunctional acrylate monomer with, (B) the reaction product of (i) at least one multifunctional acrylate monomer of (A) and, (ii) an amino-organofunctional silane of the formula X a Si{Q(NHQ′) b NZH} 4-a wherein: X is selected from alkoxy groups having 1-6 carbon atoms; Q and Q′ are the same or different divalent hydrocarbon groups; Z is a hydrogen or a monovalent hydrocarbon group; a is an integer from 1 to 3; b is an integer from 0 to 6; and thereafter, (II) mixing the product of (I) with components comprising (C) a basic dispersion of colloidal silica, and (D) an organic acid of the formula RCOOH wherein R is a monovalent hydrocarbon having from 2 to 8 carbon atoms.
Claim 3
Dependent Claim
20 words
A process as claimed in claim 1 in which in the composition there is also present one or more photo-initiators.
Claim 4
Dependent Claim
14 words
A composition as claimed in claim 2 which additionally contains one or more accelerators.
Claim 5
Dependent Claim
12 words
The product obtained by the cure of the composition of claim 1.
References Cited (Backward Citations)
No citation records indexed.
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