Primer composition

Patent metadata

Field	Value
Publication number	US-10040947-B2
Application number	US-92177509-A
Country	US
Kind code	B2
Filing date	Mar 9, 2009
Priority date	Mar 10, 2008
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

The present invention aims to provide a primer composition that can give good adhesion between an acrylic resin and an inorganic substrate, such as a substrate formed of metal, metal oxide, glass, ceramic, cement, or mortar and is suitably used as a primer for bonding them together. The primer composition is produced by mixing (a) a polythiol having at least two mercapto groups in one molecule, (b) a silane compound having at least one functional group and at least one alkoxysilyl group in one molecule, the at least one functional group being reactive with a mercapto group, and water.

First claim

The invention claimed is:

1. A method for manufacturing a layered product, comprising:
forming a primer layer on at least one surface of an inorganic substrate, the primer layer being formed of a primer composition produced by mixing (a) a polythiol having at least two mercapto groups in one molecule and (b) a silane compound having at least one functional group and at least one alkoxysilyl group in one molecule, the at least one functional group being reactive with a mercapto group and selected from groups having a carbon-carbon double bond and cyclic ether groups to react a part of the mercapto groups of the (a) component with the functional group of the (b) component, and then mixing (c) water to convert the alkoxysilyl group into a hydroxysilyl group by hydrolysis with water, wherein the molar ratio of a mercapto group of the (a) component to a functional group of the (b) component reactive with a mercapto group, the number of moles of a mercapto group of the (a) component/the number of moles of a functional group of the (b) component reactive with a mercapto group, ranges from 10/1 to 2.3/1, and the polythiol is at least one compound selected from the group consisting of poly (β-mercaptopropionates, polymercaptoglycolates, poly α-mercaptopropionate, 4-mercaptomethyl-3,6-dithiaoctane-1,8-dithiol, and 4,8-bis(mercaptomethyl)-3,6,9-trithiaundecane-1,11-dithiol; and
forming an acrylic resin layer on the primer layer, the acrylic resin layer being formed from a paint containing an acrylic resin.

Assignees

• Okazaki Koju
• Mitsui Chemicals Inc

Inventors

• Okazaki Koju

Classifications

• C08G77/28

  sulfur-containing groups · CPC title

• C09D181/02

  Polythioethers; Polythioether-ethers · CPC title

• C09D183/08

  containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen · CPC title

• C09D5/002 Primary

  Priming paints (C09D5/08 takes precedence) · CPC title

• B05D7/54

  No clear coat specified · CPC title