发明名称 |
Methods and compositions for coating substrates |
摘要 |
A method for applying a multilayer coating comprising a basecoat and a clearcoat is disclosed. The basecoat is a curable aqueous composition comprising (1) polymeric particles prepared from ethylenically unsaturated compounds including a multi-ethylenically unsaturated monomer and a keto or aldo-functional monomer, and (2) a polyhydrazide. |
申请公布号 |
US8846156(B2) |
申请公布日期 |
2014.09.30 |
申请号 |
US201313780540 |
申请日期 |
2013.02.28 |
申请人 |
PPG Industries Ohio, Inc. |
发明人 |
Swarup Shanti;Xu Xiangling;Sadvary Richard J.;Chasser Anthony M. |
分类号 |
B05D3/02;C09D175/06;B05D7/00 |
主分类号 |
B05D3/02 |
代理机构 |
|
代理人 |
Shideler Krisanne |
主权项 |
1. A method of applying a multilayer coating to a substrate comprising:
(a) applying, without application of an intermediate primer surfacer coating, a color-imparting, pigment-containing basecoat composition directly to a cured electrodeposited primer coating that is adhered to the substrate to form a curable color-imparting basecoat layer, and (b) applying a curable unpigmented coating composition to the basecoat layer to form a clear or transparent coating layer over the basecoat layer, wherein the basecoat layer is formed by depositing a polyhydrazide-containing curable aqueous composition comprising:
(i) a continuous phase comprising water, and(ii) a dispersed phase comprising:
(A) polymeric particles prepared from the polymerization of a mixture of ethylenically unsaturated monomer compounds, including ethylenically unsaturated monomers comprising:
(1) a multi-ethylenically unsaturated monomer and(2) an aldo or keto group-containing ethylenically unsaturated monomer; wherein the equivalent ratio of hydrazide groups in the polyhydrazide to aldo or keto groups is from 0.5 to 1.5:1. |
地址 |
Cleveland OH US |