Self-healing polyurethane nano-micro capsules for automotive painting

Patent metadata

Field	Value
Publication number	US-2018201802-A1
Application number	US-201715408859-A
Country	US
Kind code	A1
Filing date	Jan 18, 2017
Priority date	Jan 18, 2017
Publication date	Jul 19, 2018
Grant date	—

Abstract

A self-healing paint and protective coating system includes multiple microcapsules embedded into a protective layer applied to a panel. Each of the multiple microcapsules includes a target substance and a polymeric material covering encapsulating the target substance. Upon activation of at least one of the multiple microcapsules occurring from a mechanical rupture of the polymeric material covering, the target substance is released.

First claim

What is claimed is:

1 . A self-healing paint and protective coating system, including:
multiple microcapsules embedded into a protective layer, each of the multiple microcapsules, including:
a target substance; and
a polymeric material covering encapsulating the target substance;
wherein upon activation of at least one of the multiple microcapsules occurring from a mechanical rupture of the polymeric material covering, the target substance is released.

2 . The self-healing paint and protective coating system of claim 1 , wherein the covering defines a polyurethane material.

3 . The self-healing paint and protective coating system of claim 2 , wherein an average diameter of the microcapsules is approximately 15 μm.

4 . The self-healing paint and protective coating system of claim 2 , wherein the target substance defines an automotive ink.

5 . The self-healing paint and protective coating system of claim 1 , wherein the covering of the microcapsule has a varying thickness.

6 . The self-healing paint and protective coating system of claim 1 , wherein the microcapsules are formed using a microencapsulation chemical process.

7 . The self-healing paint and protective coating system of claim 6 , wherein the microencapsulation chemical process defines in situ polymerization using a polycondensation reaction.

8 . The self-healing paint and protective coating system of claim 7 , wherein the interfacial polymerization system provides for interfacial polymerization to occur at an interface between a first immiscible phase and a second immiscible phase.

9 . The self-healing paint and protective coating system of claim 8 , wherein the first immiscible phase contains a first main reagent and the second immiscible phase contains a second main reagent different from the first main reagent.

10 . The self-healing paint and protective coating system of claim 9 , wherein the first immiscible phase defines an organic phase.

11 . The self-healing paint and protective coating system of claim 10 , wherein the organic phase is formed of a neutral surfactant with a core material defining the first main reagent, together with an aromatic diisocyanate monomer, acetone, and octanol.

12 . The self-healing paint and protective coating system of claim 9 , wherein the second immiscible phase defines an aqueous phase.

13 . The self-healing paint and protective coating system of claim 12 , wherein the aqueous phase is formed of an aqueous solution of an alcohol defining the second main reagent.

14 . The self-healing paint and protective coating system of claim 13 , wherein the alcohol defines a poly(vinyl alcohol).

15 . A method for synthesizing microcapsules for inclusion into a protective coating, including:
creating an interfacial polymerization system having an organic phase and an aqueous phase; forming the organic phase of a neutral surfactant with a core material defining a first main reagent; preparing the aqueous phase as an aqueous solution of an alcohol; and stirring a mixture of the organic phase and the aqueous phase to form a plurality of microcapsules as an in situ polymerization defining a polycondensation reaction, each of the microcapsules having a portion of the first main reagent encapsulated by a polymeric material coating.

16 . The method for synthesizing microcapsules for inclusion into a protective coating of claim 15 , further including conducting the stirring step at a rate between approximately 200 rpm to 1800 rpm.

17 . The method for synthesizing microcapsules for inclusion into a protective coating of claim 15 , further including controlling a temperature of the mixture in a range between approximately 10° C. up to approximately 130° C.

18 . The method for synthesizing microcapsules for inclusion into a protective coating of claim 15 , further including continuing the stirring step for a time period ranging from approximately one (1) hour up to approximately twelve (12) hours.

19 . The method for synthesizing microcapsules for inclusion into a protective coating of claim 15 , further including:
adding an aromatic diisocyanate monomer, acetone, and octanol to the organic phase prior to the stirring step; inserting an automotive ink as the first main reagent; and embedding the microcapsules into an automotive paint.

20 . A method for synthesizing microcapsules for inclusion into a protective coating, including:
creating an interfacial polymerization system having an organic phase and an aqueous phase; forming the organic phase of a neutral surfactant with a core material defining a first main reagent, together with an aromatic diisocyanate monomer, acetone, and octanol; preparing the aqueous phase as an aqueous solution of an alcohol; stirring a mixture of the organic phase and the aqueous phase at a rate between approximately 200 rpm to 1800 rpm to form a plurality of microcapsules as an in situ polymerization defining a polycondensation reaction, each of the microcapsules having a portion of the first main reagent encapsulated by a polymeric material coating; and embedding the microcapsules into a protective coating wherein upon activation of at least one of the multiple microcapsules occurring from a mechanical rupture of the polymeric material covering, the first main reagent is released.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Sakuramoto Carlos Y
• De Carvalho Agne Roani
• De Goes Marcel Andrey
• Dantas Marangoni Paulo Roberto
• Coelho Berton Marcos Antonio

Classifications

• C09D7/14

  Chemistry & Metallurgy · mapped topic

• C09D129/04 Primary

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C09D11/00

  Inks · CPC title

• B01J13/18

  In situ polymerisation with all reactants being present in the same phase · CPC title

• C09D7/80 Primary

  Processes for incorporating ingredients · CPC title