# US 4,396,650 A · Primed inorganic substrates overcoated with curable protective compositions

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,396,650 A
- Document ID: US4396650A
- Status: Granted
- Kind: A
- Application number: 06/385,790
- Filed: 1982-06-07
- Granted: 1983-08-02
- Earliest claimed: 1981-05-20
- Assignees: Minnesota Mining and Manufacturing Company
- Inventors: Roger W. Lange; Alek P. Szecsy
- Web page: https://patentgrep.com/patent/US4396650A

## CPC

- 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}
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

Primer compositions for adhering overcoatings derived from in situ polymerizations of uncured monomers onto inorganic substrates are disclosed. These primer compositions comprise at least one non-amino- or non-amido-containing silane, at least one of certain metal esters, and preferably an acidic material. The overcoatings are derived from epoxy and vinyl monomers. The primed and overcoated substrates of the present invention provide articles having protective, decorative, or other functional surface layers.

## Claims

### Claim 1

A method for preparing a layered structure comprising the steps of:
a. providing a substrate selected from a metal, metal oxide, or ceramic,
b. coating at least one surface of said substrate with a primer composition comprising:
(1) one part by weight of a non-amino- or non-amido-containing silane of the formula
[R.sup.1 ].sub.m --Si--[R.sup.2 ].sub.n ( 1)
in which R.sup.1 is an alkyl or cycloalkyl group that can be unsubstituted or substituted by an ethenyl, methethenyl, acryloxy, methacryloxy, epoxy, mercapto, or an isocyanato group, said substituted group having a total of two to ten carbon atoms and said unsubstituted group having a total of one to eight carbon atoms; R.sup.2 is a hydrolyzable group selected from alkoxy groups having one to eight carbon atoms and acyloxy groups having two to eight carbon atoms; m is an integer from 1 to 3; n is an integer from 1 to 3, with the proviso that m+n=4;
(2) 1 to 50 parts by weight of metal ester of the formula
M[OR.sup.3 ].sub.x ( 2)
in which M is a metal selected from a group comprising titanium, tantalum, zirconium, aluminum, and antimonyl; R.sup.3 is an alkyl group having from one to eight carbon atoms; and x is equal to the number of valence bonds of M;
(3) 0.5:1 to 4:1 moles by weight of an inorganic acidic material, or 0.5:1 to 8:1 moles by weight of an organic acidic material, compared to the total moles by weight of metal ester plus silane; and
(4) an amount of solvent consisting essentially of organic solvent sufficient to provide for blending of the components of said primer composition;
c. overcoating said primer composition with at least one layer of an uncured organic monomer composition, said monomer selected from epoxy and vinyl monomers, and
d. curing said organic composition.

### Claim 2 (depends on 1)

The method according to claim 1 wherein said primer composition is cured previous to or at the time of curing of said monomer composition.

### Claim 3 (depends on 1)

The method according to claim 1 wherein said solvent in the primer composition is selected from isopropyl alcohol, ethanol, butanol, 2-ethylhexanol, acetone, and methyl ethyl ketone.