High performance induction curable two-component structural adhesive with nonsagging behavior

• US 4,762,864 A
• Filed: 06/19/1986
• Issued: 08/09/1988
• Est. Priority Date: 06/19/1986
• Status: Expired due to Term

• Current Assignee: Ashland Licensing and Intellectual Property Llc
• Original Assignee: Ashland Oil, Inc. (Ashland Global Holdings, Inc.)
• Inventors: DeLong, Teresa, Jones, Jeffrey P., Goel, Anil B., Holehouse, Joseph G.
• Primary Examiner(s): Ivy, C. Warren
• Application Number:
  US06/876,060
• Time in Patent Office: 782 Days
• Field of Search: 523/442, 523/458, 523/428, 523/300, 523/429, 252/513
• US Class Current: 523/428
• CPC Class Codes: B29C 65/00 Joining or sealing of preformed parts , e.g. welding of plastics materials; Apparatus therefor general aspects of processes or apparatus for joining preformed parts B29C66/00; using porous material formed by internal pressure generated therein for joining preformed parts B29C44/1228, B29C44/326
• CPC Class Codes: B29C 65/3612 comprising fillers
• CPC Class Codes: B29C 65/368 with a polymer coating
• CPC Class Codes: B29C 65/3696 with a coating
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/7212 characterised by the composition of the fibres
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29K 2067/00 Use of polyesters or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2309/08 Glass
• CPC Class Codes: C08G 59/18 Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
• CPC Class Codes: C08G 59/226 Mixtures of di-epoxy compounds
• CPC Class Codes: C08G 59/38 together with di-epoxy compounds
• CPC Class Codes: C08K 3/08 Metals
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08L 2666/22 Macromolecular compounds not provided for in C08L2666/16 - C08L2666/20
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins

Abstract

An adhesive composition which is curable by electromagnetic induction heating when it is applied to various substrates, said adhesive comprising a mixture of

(I) An epoxy resin component and

(II) A hardener component and

(III) From 2 to 60% by weight of (I) and (II) of an electromagnetic energy absorbing material is described.

Claims

1. A two component adhesive composition which is curable by induction heating which comprises a mixture of the components

(I) an epoxy resin component comprising (a) an epoxy resin, from 1 to 15% by weight of which is a flexible di- or tri-glycidyl ether of a poly(alkylene glycol), (b) from 1 to 15% by weight of the epoxy resin of a carboxylic acid terminated acrylonitrile-butadiene rubber and (c) from 2 to 50% by weight of an electromagnetic energy absorbing material selected from the group consisting of particulate, magnetizable iron, cobalt, nickel, alloys of nickel and iron, alloys of nickel and chromium, inorganic oxides of iron, inorganic oxides of nickel, carbonaceous materials and mixtures thereof, and

(II) a hardener component comprising (a) from 50 to 90% by weight of a poly(alkylene oxide) di- or tri-primary amine having a molecularr weight greater than 2000, (b) up to 20% by weight of a poly(alkylene oxide) di- or tri-primary amine and/or amido-amine having a molecular weight in the range of from 200 to 600, (c) up to 10% by weight of a compound selected from the group consisting of ethylene diamine, aminoethyl piperazine and di-ethanol amine, (d) from 2 to 15% by weight of a phenolic compound, (e) up to 15% by weight of an amine cure accelerator selected from the group consisting of tertiary amino group containing molecules and boron trifluoride-amine complexes and (f) from 20 to 60% by weight of an electromagnetic material selected from the group consisting of particulate, magnetizable iron, cobalt, nickel, alloys of nickel and iron, alloys of nickel and chromium, inorganic oxides of iron, inorganic oxides of nickel, carbonaceous materials and mixtures thereof.

2. The composition of claim 1 wherein the epoxy resin is a compound containing more than one group of the formula ##STR2##

3. The composition of claim 2 wherein (I) comprises a diglycidyl ether of Bisphenol-A, a carboxylic acid terminated butadiene, acrylonitrile rubber and a diglycidyl ether of poly(propylene glycol).

4. The composition of claim 2 wherein (II) comprises a poly(propylene oxide) tri-primary amine, tris-(dimethylaminomethyl) phenol, and aminoethyl piperazine.

5. The composition of claim 2 wherein (III) is ferric oxide.