Title:
TWO-PART ADHESIVE COMPOSITION THAT UNDERGOES A VISUAL CHANGE WHEN CURED
Document Type and Number:
WIPO Patent Application WO/2020/136511
Kind Code:
A3
Abstract:
The present disclosure provides a method for bonding parts, comprising the following steps (a) Providing a two-component adhesive composition precursor, comprising a first part (A) comprising at least one epoxy curing agent and preferably at least one first dye; a second part (B) comprising at least one second dye different from the at least one first dye and at least one epoxy resin; (b) Mixing part (A) and part (B) of the two-component adhesive composition precursor so as to obtain an adhesive composition; (c) Applying the adhesive composition onto a first part; (d) Applying a second part onto the adhesive composition applied to the first part; and then performing a first curing step at a first temperature, wherein the adhesive composition undergoes a first colour change; or (e) Performing a first curing step at a first temperature, wherein the adhesive composition undergoes a first colour change, and then applying a second part onto the adhesive composition applied to the first part; (f) Perform a second curing step at a second temperature higher than the first temperature, thereby fully curing the adhesive composition so as to obtain a structural adhesive bond between the first and second parts, wherein the adhesive composition undergoes a second colour change.
Inventors:
JUNG ADRIAN T (DE)
BARDTS MAREIKE (DE)
HASENBERG DIRK (DE)
BARDTS MAREIKE (DE)
HASENBERG DIRK (DE)
Application Number:
PCT/IB2019/061037
Publication Date:
September 03, 2020
Filing Date:
December 18, 2019
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
International Classes:
C09J5/06; C09J11/06; C09J163/00
Domestic Patent References:
| WO2012003204A1 | 2012-01-05 | |||
| WO2017001592A1 | 2017-01-05 | |||
| WO2018008742A1 | 2018-01-11 |
Foreign References:
| US5425824A | 1995-06-20 | |||
| JPS5692977A | 1981-07-28 | |||
| JP2019026798A | 2019-02-21 |
Attorney, Agent or Firm:
SOO, Philip P. et al. (US)
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