Precoated aluminum material and aluminum composite material

Patent metadata

Field	Value
Publication number	US-2021324225-A1
Application number	US-201917274360-A
Country	US
Kind code	A1
Filing date	Sep 10, 2019
Priority date	Sep 10, 2018
Publication date	Oct 21, 2021
Grant date	—

Abstract

A precoated aluminum material to which various resin members can be bonded and an aluminum composite material that is prepared using this precoated aluminum material are provided. A precoated aluminum material ( 1 ) comprises: a substrate ( 2 ) composed of an aluminum material; and a primer coating ( 3 ) formed on the substrate ( 2 ). The primer coating ( 3 ) contains urethane resin. In the infrared-absorption spectrum of the primer coating ( 3 ), the value of the optical absorption A C═O at the peak top of the maximum peak among peaks present in the wavenumber range of 1,180-1,330 cm −1 is 0.8-1.5 times that of the optical absorption A urethane at the peak top of the maximum peak among peaks present in the wavenumber range of 1,670-1,770 cm −1 .

First claim

1 . A precoated aluminum material, to which a resin member is bondable, comprising:
a substrate composed of an aluminum material; and a primer coating formed on the substrate; wherein: the primer coating:
contains urethane resin; and
has an infrared-absorption spectrum in which the value of the optical absorption A C═O at the peak top of the maximum peak among peaks present in the wavenumber range of 1,180-1,330 cm −1 is 0.8-1.5 times that of the optical absorption A urethane at the peak top of the maximum peak among peaks present in the wavenumber range of 1,670-1,770 cm −1 .

2 . The precoated aluminum material according to claim 1 , wherein, in the infrared-absorption spectrum of the primer coating, the value of the optical absorption A COC at the peak top of the maximum peak among peaks present in the wavenumber range of 990-1,150 cm −1 is 0.7-1.3 times that of the optical absorption A urethane .

3 . The precoated aluminum material according to claim 1 , wherein, in the infrared-absorption spectrum of the primer coating, the value of the optical absorption A aromatic at the peak top of the maximum peak among peaks present in the wavenumber range of 660-760 cm −1 is 1.0-1.7 times that of the optical absorption A urethane .

4 . The precoated aluminum material according to claim 1 , wherein the urethane resin contains a structural unit derived from a polyester polyol.

5 . The precoated aluminum material according to claim 1 , wherein the urethane resin contains a structural unit derived from an aromatic polyisocyanate.

6 . The precoated aluminum material according to claim 1 , wherein the primer coating contains 3-50 parts by mass of an acrylic resin to 100 parts by mass of the urethane resin.

7 . The precoated aluminum material according to claim 1 , wherein the primer coating contains 0.3-13 parts by mass of a melamine resin in relation to 100 parts by mass of the urethane resin.

8 . An aluminum composite material comprising:
the precoated aluminum material according to claim 1 ; and a resin member, which contains one or two or more from among polybutylene terephthalate, polyamide, polyphenylene sulfide, and acrylonitrile-butadiene-styrene copolymer and is bonded to the primer coating of the precoated aluminum material.

9 . The precoated aluminum material according to claim 2 , wherein, in the infrared-absorption spectrum of the primer coating, the value of the optical absorption A aromatic at the peak top of the maximum peak among peaks present in the wavenumber range of 660-760 cm −1 is 1.0-1.7 times that of the optical absorption A urethane .

10 . The precoated aluminum material according to claim 9 , wherein the urethane resin contains a structural unit derived from a polyester polyol.

11 . The precoated aluminum material according to claim 10 , wherein the urethane resin contains a structural unit derived from an aromatic polyisocyanate.

12 . The precoated aluminum material according to claim 11 , wherein the primer coating contains 3-50 parts by mass of an acrylic resin per 100 parts by mass of the urethane resin.

13 . The precoated aluminum material according to claim 12 , wherein the primer coating contains 0.3-13 parts by mass of a melamine resin per 100 parts by mass of the urethane resin.

14 . An aluminum composite material comprising:
the precoated aluminum material according to claim 13 ; and a resin member bonded to the primer coating of the precoated aluminum material, the resin member comprising at least one polymer selected from the group consisting of polybutylene terephthalate, polyamide, polyphenylene sulfide, and acrylonitrile-butadiene-styrene copolymer.

15 . A composition of matter, comprising:
a substrate composed of aluminum or an aluminum alloy; and an adhesive primer coating bonded to the substrate and comprising a polyurethane; wherein an infrared-absorption spectrum of the adhesive primer coating exhibits:
a maximal value of optical absorption A C═O in the wavenumber range of 1,180-1,330 cm −1 ,
a maximal value of optical absorption A urethane in the wavenumber range of 1,670-1,770 cm −1 , and
the maximal value of optical absorption A C═O is 0.8-1.5 times the maximal value of optical absorption A urethane .

16 . The composition of matter according to claim 15 , wherein the infrared-absorption spectrum of the adhesive primer coating further exhibits:
a maximal value of optical absorption A COC in the wavenumber range of 990-1,150 cm −1 , a maximal value of optical absorption A aromatic in the wavenumber range of 660-760 cm −1 , the maximal value of optical absorption A COC is 0.7-1.3 times the optical absorption A urethane , and the maximal value of optical absorption A aromatic is 1.0-1.7 times the optical absorption A urethane .

17 . The composition of matter according to claim 16 , wherein the polyurethane is composed of alternating structural units derived from a polyester polyol and from an aromatic diisocyanate.

18 . The composition of matter according to claim 17 , wherein the adhesive primer coating further contains 3-50 parts by mass of an acrylic resin per 100 parts by mass of the polyurethane.

19 . The composition of matter according to claim 18 , wherein the adhesive primer coating further contains 0.3-13 parts by mass of a melamine resin per 100 parts by mass of the polyurethane.

20 . An aluminum composite material comprising:
the composition of matter according to claim 17 ; and a resin member bonded to the adhesive primer coating, the resin member comprising at least one polymer selected from the group consisting of polybutylene terephthalate, polyamide, polyphenylene sulfide, and acrylonitrile-butadiene-styrene copolymer.

Assignees

• Uacj Corp

Inventors

• Kato Osamu

Classifications

• C09D177/00 Primary

  Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain (based on polyhydrazides C09D179/06; based on polyamide-imides C09D179/08); Coating compositions based on derivatives of such polymers · CPC title

• C09D175/06

  from polyesters · CPC title

• C09D175/04

  Polyurethanes · CPC title

• B29C45/14

  incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles {(B29C45/1671 takes precedence)} · CPC title

• B32B15/095

  comprising polyurethanes · CPC title