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US 6,846,559 B2Granted
Activatable material
AssigneeL&L Products, Inc.
InventorsMichael J. Czaplicki, David Kosal
Life of this patent
Estimating the term…
Abstract
An activatable (e.g., heat expandable) material and articles incorporating the same is disclosed. The material includes an epoxy resin; an epoxy/elastomer hybrid or reaction product; a blowing agent; a curing agent; and optionally, a filler. In preferred embodiments, the material includes aramid fiber, nanoclay or both.
Claims27
An adhesive expandable material, comprising:
- greater than 40% by weight of an epoxy resin;
- greater than 30% by weight epoxy/elastomer adduct, the adduct being a reaction product of an epoxy and an elastomer;
- a fiber reinforcement material intermixed in the adhesive material;
- and
- a nanoclay;
- wherein the adhesive expandable material is substantially devoid of EMA and EVA.
3 more elements
An adhesive expandable material, comprising:
- greater than about 40% by weight of an epoxy resin, the epoxy resin being substantially entirely a bisphenol A liquid epoxy;
- greater than about 30% by weight epoxy/elastomer adduct, the epoxy/elastomer adduct being a solid epoxy-carboxyl terminated butyl nitrile (CTBN) rubber adduct;
- fiber reinforcement material, the fiber reinforcement material being a pulped aramid fiber;
- and
- about 0.1% to about 4.0% by weight nanoclay;
- wherein the adhesive expandable material is substantially devoid of polymers acetate and acrylate polymers.
3 more elements
An adhesive expandable material, comprising:
- about 40% to about 60% by weight of an epoxy resin, the epoxy resin being substantially entirely a bisphenol A liquid epoxy;
- about 30% to about 50% by weight epoxy/elastomer adduct, the epoxy/elastomer adduct being a solid epoxy-carboxyl terminated butyl nitrile (CTBN) rubber adduct;
- a blowing agent selected from the group consisting of an amide and an amine;
- a curing agent selected from the group consisting of polyamine and polyamide;
- fiber reinforcement material, the fiber reinforcement material being a pulped aramid fiber;
- and
- about 0.1% to about 4.0% by weight nanoclay;
- wherein the adhesive expandable material is substantially free of thermoplastic polymers and the expandable material exhibits expansion to greater than 100% of its original size upon activation.
5 more elements
An activatable material, comprising:
- an adhesive expandable material including:
- i) about 10% to about 70% by weight of an epoxy resin;
- and
- ii) about 20% to about 50% by weight epoxy/elastomer adduct wherein the adduct is a reaction product of an epoxy and an elastomer;
- iii) a fiber reinforcement intermixed within the adhesive material;
- and
- iv) a nanoclay;
- and
- a substantially tack free handling surface disposed upon the adhesive expandable material.
6 more elements
An activatable material, comprising:
- an adhesive expandable material including:
- i) about 10% to about 70% by weight of an epoxy resin;
- and
- ii) about 20% to about 50% by weight epoxy/elastomer adduct;
- and
- a substantially tack free handling surface disposed upon the adhesive expandable material;
- wherein the handling surface is provided by a layer dispose upon the adhesive expandable material;
- and
- wherein the layer is less than about 10 microns thick.
6 more elements
An activatable material, comprising:
- an adhesive expandable material including:
- i) about 40% to about 70% by weight of an epoxy resin;
- ii) about 30% to about 50% by weight epoxy/elastomer adduct wherein the epoxy/elastomer adduct is a solid epoxy-carboxyl teminated butyl nitrile rubber adduct;
- iii) about 0.1% to about 4.0% by weight nanoclay;
- and
- iv) a fiber reinforcement material
- a substantially tack free handling surface disposed upon the adhesive expandable material.
4 more elements
Dependencies are inferred from the claim text.