Activatable material for sealing, baffling or reinforcing and method of forming same
First Claim
Patent Images
1. A method of adhesion, the method comprising:
- extruding a mass of a tack-free activatable material, the activatable material including;
i) between about 10 and about 20% by weight of an epoxy resin;
ii) an epoxy/elastomer adduct in an amount at least approximately 20 to less than about 30% by weight of the activatable material, wherein the adduct is a solid at a temperature of 23°
C.;
iii) between about 3 and about 7% by weight of one or more thermoplastic polyethers;
iv) between about 5 and about 10% by weight of the activatable material of a core/shell polymer impact modifier that includes a core of a first polymeric material and a shell of a second polymeric material, wherein second polymeric material is grafted onto and encapsulates the first polymeric material; and
the first polymeric material has a glass translation temperature of at least about 10°
C. below a glass transition temperature of the second polymeric material; and
v) between about 0.001 and about 7% by weight of a curing agent;
locating the activatable material adjacent a first surface and a second surface of an automotive vehicle, the first surface and second surface being part of a hem flange joint wherein the activatable material is located adjacent the first surface and the second surface as a substantially tack-free elongated strip; and
activating the activatable material to bond the activatable material to the first surface and second surface;
wherein the glass transition temperature of the first polymeric material is less than about 23°
C. and the glass transition temperature of the second polymeric material is at least about 23°
C.
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Accused Products
Abstract
An activatable material and articles incorporating the same is disclosed. The activatable material includes at least two of epoxy resin; impact modifier; blowing agent; curing agent; and filler. The activatable material is preferably used for sealing, baffling, adhering or reinforcing an article of manufacture such as an automotive vehicle.
128 Citations
20 Claims
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1. A method of adhesion, the method comprising:
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extruding a mass of a tack-free activatable material, the activatable material including; i) between about 10 and about 20% by weight of an epoxy resin; ii) an epoxy/elastomer adduct in an amount at least approximately 20 to less than about 30% by weight of the activatable material, wherein the adduct is a solid at a temperature of 23°
C.;iii) between about 3 and about 7% by weight of one or more thermoplastic polyethers; iv) between about 5 and about 10% by weight of the activatable material of a core/shell polymer impact modifier that includes a core of a first polymeric material and a shell of a second polymeric material, wherein second polymeric material is grafted onto and encapsulates the first polymeric material; and
the first polymeric material has a glass translation temperature of at least about 10°
C. below a glass transition temperature of the second polymeric material; andv) between about 0.001 and about 7% by weight of a curing agent; locating the activatable material adjacent a first surface and a second surface of an automotive vehicle, the first surface and second surface being part of a hem flange joint wherein the activatable material is located adjacent the first surface and the second surface as a substantially tack-free elongated strip; and activating the activatable material to bond the activatable material to the first surface and second surface; wherein the glass transition temperature of the first polymeric material is less than about 23°
C. and the glass transition temperature of the second polymeric material is at least about 23°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14, 15, 16, 17, 18)
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8. A method of adhesion, the method comprising:
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extruding a mass of a tack-free activatable material, the activatable material including; i) between about 10 and about 20% by weight of an epoxy resin; ii) an epoxy/elastomer adduct in an amount that ranges from about 20 to about 30% by weight of the activatable material, wherein the adduct is a solid at a temperature of 23°
C.;iii) between about 3 and about 7% by weight of one or more thermoplastic polyethers; iv) between about 5 and about 10% by weight of the activatable material of a core/shell polymer impact modifier that includes a core of a first polymeric material and a shell of a second polymeric material, wherein second polymeric material is grafted onto and encapsulates the first polymeric material; and
the first polymeric material has a glass translation temperature of at least about 10°
C. below a glass transition temperature of the second polymeric material; andv) between about 0.001 and about 7% by weight of a curing agent; vi) at least 35% by weight of a filler material; locating the activatable material adjacent a first metal surface of a first member of an automotive vehicle and a second metal surface of a second member of the automotive vehicle wherein the activatable material is located adjacent the first surface and second surface as a substantially tack-free elongated strip; and activating the activatable material to bond the activatable material to the first member and the second; wherein the glass transition temperature of the first polymeric material is less than about 23°
C. and the glass transition temperature of the second polymeric material is at least about 23°
C. - View Dependent Claims (9, 10, 11, 12, 13, 19, 20)
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Specification