Vehicle body part and method of forming a vehicle body part

Patent metadata

Field	Value
Publication number	US-11179746-B2
Application number	US-201616324899-A
Country	US
Kind code	B2
Filing date	Aug 10, 2016
Priority date	Aug 10, 2016
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

A vehicle body part including a support, an uncured sealer and an uncured primer, the uncured sealer being interposed between the support and the uncured primer, the uncured sealer and the uncured primer each including a compatible solvent, each compatible solvent having a log P ow value and an absolute value of a difference between the log P ow value of the compatible solvent of the uncured primer and the compatible solvent of the uncured sealer being equal to or smaller than 3.0. A method of forming a finished vehicle body part.

First claim

The invention claimed is:

1. A vehicle body part comprising
a support,
an uncured sealer, and
an uncured primer, wherein
the vehicle body part is a door or a hood,
the uncured sealer is interposed between the support and the uncured primer,
the uncured sealer and the uncured primer each comprise a compatible solvent,
each compatible solvent has a log P ow value, and
an absolute value of a difference between the log P ow value of the compatible solvent of the uncured primer and the compatible solvent of the uncured sealer being equal to or smaller than 3.0; where
the uncured sealer comprises 15-50 wt % of plasticizer, and
the door or the hood has an opening, a strip of the uncured sealer being applied at the opening of the door or the hood to prevent water from entering into a finished vehicle that includes the door or the hood.

2. The vehicle body part according to claim 1 , wherein the absolute value of the difference between the log P ow value of the compatible solvent of the uncured primer and the compatible solvent of the uncured sealer being equal to or smaller than 2.5.

3. The vehicle body part according to claim 2 , wherein the absolute value of the difference between the log P ow value of the compatible solvent of the uncured primer and the compatible solvent of the uncured sealer being equal to or smaller than 2.0.

4. A method of forming a finished vehicle body part having a support comprising the steps of:
applying an uncured sealer on the support; and
applying an uncured primer on the uncured sealer, so as to form the vehicle body part according to claim 1 .

5. The method according to claim 4 , wherein after applying the uncured primer, a curing step is performed.

6. The method according to claim 4 , wherein a cured electrodeposition coating has been applied on the support before applying the uncured sealer.

7. The method according to claim 4 , comprising a step of applying a base coat.

8. The method according to 7 , comprising a step of applying a clear coat on the base coat.

9. The method according to claim 7 , wherein after applying the base coat, a curing step is performed.

10. The method according to claim 8 , wherein after applying the clear coat, a curing step is performed.

Assignees

• Toyota Motor Europe
• Henkel Ag & Co Kgaa

Inventors

• Bosmans Johan
• Ogawa Junya
• Castrillo Clemente Gloria
• Bederke Nadine
• Johann Wolfgang
• Neeb Thorsten

Classifications

• B05D7/14

  to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23) · CPC title

• B05D2202/15

  Stainless steel · CPC title

• B05D7/542 Primary

  the two layers being cured or baked together · CPC title

• B05D7/577

  some layers being coated "wet-on-wet", the others not · CPC title

• B05D2252/10

  Applying the material on both sides · CPC title