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WO1994008781B1 - Pressure-sensitive structural adhesive - Google Patents

Pressure-sensitive structural adhesive

Info

Publication number
WO1994008781B1
WO1994008781B1 PCT/US1993/009996 US9309996W WO9408781B1 WO 1994008781 B1 WO1994008781 B1 WO 1994008781B1 US 9309996 W US9309996 W US 9309996W WO 9408781 B1 WO9408781 B1 WO 9408781B1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
core layer
sensitive
structural adhesive
adhesive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1993/009996
Other languages
French (fr)
Other versions
WO1994008781A1 (en
Filing date
Publication date
Application filed filed Critical
Priority to EP93924363A priority Critical patent/EP0665782B1/en
Priority to DE69328187T priority patent/DE69328187D1/en
Priority to AU54077/94A priority patent/AU5407794A/en
Publication of WO1994008781A1 publication Critical patent/WO1994008781A1/en
Publication of WO1994008781B1 publication Critical patent/WO1994008781B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Abstract

A pressure-sensitive structural adhesive is formed by applying a thin layer of pressure-sensitive adhesive (20, 22) to one or both sides of a core layer (18) of partially cured structural adhesive. The pressure-sensitive adhesive provides a tacky surface allowing a temporary bond at room temperature. Upon curing of the construction, the bond properties change to that of a structural adhesive, providing a strong permanent bond. Upon cure, the skin layer or layers of pressure-sensitive adhesive are absorbed into the layer of structural adhesive.

Claims

AMENDED CLAIMS[received by the International Bureau on 3 March 1993 (03.03.94); original claims 1-7 replaced by amended claims 1-5 (2 pages)]
1. A pressure-sensitive structural adhesive composition comprising a curable core layer of a curable structural adhesive which is a partially cured B-stage resin or a blend of an epoxy resin, an acrylate ester resin and hardener, said core layer of a curable structural adhesive providing opposed surfaces and having on at least one surface thereof a separate continuous or discontinuous layer of a tacky pressure- sensitive adhesive, the pressure-sensitive adhesive providing an initial adhesion between a substrate to be bonded by the cured core layer, said pressure sensitive adhesive layer being absorbed by the core layer when a permanent thermoset bond to such substrate is formed by thermal cure of the curable core layer.
2. The pressure-sensitive structural adhesive as claimed in claim 1 in which there is present an impact improving resin which is compatible with the structural adhesive and included in the core layer, the pressure- sensitive adhesive layer or both the core layer and pressure-sensitive adhesive layer.
3. The pressure-sensitive structural adhesive as claimed in claim 2 in which the compatible impact improving resin is an elastomer. -19-
4. The pressure-sensitive structural adhesive as claimed in any of claims 1 to 3 in which the pressure- sensitive adhesive is on both surfaces of the core layer and the pressure-sensitive adhesive layers bond two substrates together until the curable core layer is cured by application of heat.
5. The pressure-sensitive structural adhesive as claimed in any one of claims 1 to 8 in which electromagnetic materials are blended into the curable core layer and the core layer is thermally cured by electromagnetic induction heating.WHAT IS CLAIMED IS:
PCT/US1993/009996 1992-10-20 1993-10-19 Pressure-sensitive structural adhesive Ceased WO1994008781A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP93924363A EP0665782B1 (en) 1992-10-20 1993-10-19 Pressure-sensitive structural adhesive
DE69328187T DE69328187D1 (en) 1992-10-20 1993-10-19 STRUCTURAL ADHESIVE
AU54077/94A AU5407794A (en) 1992-10-20 1993-10-19 Pressure-sensitive structural adhesive

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96367492A 1992-10-20 1992-10-20
US07/963,674 1992-10-20

Publications (2)

Publication Number Publication Date
WO1994008781A1 WO1994008781A1 (en) 1994-04-28
WO1994008781B1 true WO1994008781B1 (en) 1994-05-11

Family

ID=25507549

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/009996 Ceased WO1994008781A1 (en) 1992-10-20 1993-10-19 Pressure-sensitive structural adhesive

Country Status (5)

Country Link
US (1) US5593759A (en)
EP (1) EP0665782B1 (en)
AU (1) AU5407794A (en)
DE (1) DE69328187D1 (en)
WO (1) WO1994008781A1 (en)

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