Multi-coat painting process
First Claim
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1. A process for producing a multi-coat lacquering on a substrate provided with a stoved first electrodeposition lacquer layer, comprising:
- applying a second coating layer corresponding to a dry layer thickness of 10 μ
m to less than 30 μ
m comprising a first water-based, colour-providing and/or effect-providing base lacquering agent which contains one or more polyurethane resins to the first electrodeposition lacquer layer;
applying wet-on-wet, a third coating layer corresponding to a dry layer thickness of 7 μ
m to 15 μ
m, comprising a second water-based, colour-providing and/or effect-providing base lacquering agent;
applying a fourth coating layer comprising a clear lacquer coating agent to the third coating layer without prior stoving; and
stoving the second, third and fourth coating layers togetherwherein the first and second water-based base lacquering agents contain the same or different polyurethane resins;
wherein the first base lacquering agent has a higher concentration of polyurethane resin than the second base lacquering agent, with respect to total weight of the respective water-based base lacquering agent; and
wherein solid resin content in the first base lacquering agent differs by not more than 20% from an absolute value of weight of solid resin in the second base lacquering agent.
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Abstract
Process for multi-coat lacquering of a substrate with a stoved first electrodeposition layer by applying a second surface coating layer of 10 to 30 μm dry layer thickness consisting of a base lacquering agent containing a first, water-based, polyurethane resin, and wet-on-wet application of a third coating agent with a thinner dry layer thickness of 7 to 15 μm consisting of a second water-based base lacquering agent, further application without prior stoving of a clear lacquer layer and mutual stoving, wherein the first base lacquering agent has a higher concentration of polyurethane resin than the second base lacquering agent.
55 Citations
9 Claims
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1. A process for producing a multi-coat lacquering on a substrate provided with a stoved first electrodeposition lacquer layer, comprising:
-
applying a second coating layer corresponding to a dry layer thickness of 10 μ
m to less than 30 μ
m comprising a first water-based, colour-providing and/or effect-providing base lacquering agent which contains one or more polyurethane resins to the first electrodeposition lacquer layer;applying wet-on-wet, a third coating layer corresponding to a dry layer thickness of 7 μ
m to 15 μ
m, comprising a second water-based, colour-providing and/or effect-providing base lacquering agent;applying a fourth coating layer comprising a clear lacquer coating agent to the third coating layer without prior stoving; and stoving the second, third and fourth coating layers together wherein the first and second water-based base lacquering agents contain the same or different polyurethane resins; wherein the first base lacquering agent has a higher concentration of polyurethane resin than the second base lacquering agent, with respect to total weight of the respective water-based base lacquering agent; and wherein solid resin content in the first base lacquering agent differs by not more than 20% from an absolute value of weight of solid resin in the second base lacquering agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification
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Current AssigneeHerberts Gesellschaft Mit Beschrankter Haftung
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Original AssigneeHerberts Gesellschaft Mit Beschrankter Haftung
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InventorsSchlaak, Detlef
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Primary Examiner(s)RAIMUND, CHRISTOPHER W
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Application NumberUS09/101,271Time in Patent Office327 DaysField of Search427/388.4, 427/393.5, 427/409, 205/149, 205/158, 205/198US Class Current205/198CPC Class CodesB05D 7/577 some layers being coated "w...
