Expandable vibration damping materials
AssigneeLear Corporation
InventorCollin C. Malcolm
Life of this patent
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Abstract
The present invention relates to relatively inexpensive multi-purpose expandable vibration damping material compositions particularly useful in constrained layer applications. The composition essentially includes an elastomeric polymer, plasticizer, thermoplastic polymer, foaming agent, adhesion promoters and filler. In addition to the aforementioned, under certain embodiments, the expandable vibration damping material compositions may also employ rheological modifiers such as cross-linking agents and epoxy curing agents.
Claims33
An expandable vibration damping material composition capable of conforming to the contour of the substrate to which it is applied upon sufficient heating, comprising:
- (a) about 2.0% to about 24.0% by weight of at least one elastomeric polymer;
- (b) about 2.0% to about 14.0% by weight of at least one plasticizer;
- (c) about 2.0% to about 22.0% by weight of at least one thermoplastic polymer;
- (d) about 2.0% to about 20.0% by weight of at least one adhesion promoting agent;
- (e) about 0.5% to about 8.0% of at least one foaming agent;
- and
- (f) up to about 70% by weight of at least one filler;
- wherein the total constituency is equal to 100.0% by weight.
An expandable vibration damping material composition for a constrained layer application between two substrates, comprising:
- (a) about 2.0% to about 24.0% by weight of at least one elastomeric polymer;
- (b) about 2.0% to about 14.0% by weight of at least one plasticizer;
- (c) about 2.0% to about 22.0% by weight of at least one thermoplastic polymer;
- (d) about 2.0% to about 20.0% by weight of at least one adhesion promoting agent;
- (e) about 0.5% to about 8.0% of at least one foaming agent;
- and
- (f) up to about 70% by weight of at least one filler;
- wherein the total constituency is equal to 100.0% by weight.
An automobile body panel including a vibration damping material composition which is adhered thereto, said composition comprising:
- (a) about 2.0% to about 24.0% by weight of at least one elastomeric polymer;
- (b) about 2.0% to about 14.0% by weight of at least one plasticizer;
- (c) about 2.0% to about 22.0% by weight of at least one thermoplastic polymer;
- (d) about 2.0% to about 20.0% by weight of at least one adhesion promoting agent;
- (e) about 0.5% to about 8.0% of at least one foaming agent;
- and
- (f) up to about 70% by weight of at least one filler;
- wherein the total constituency is equal to 100.0% by weight.
An expandable vibration damping material composition, comprising:
- (a) at least one elastomeric polymer comprising a tri-block copolymer including polystyrene blocks and vinyl bonded polyisoprene blocks, said isoprene mid-blocks exhibiting 3,4 polymerization;
- (b) at least one plasticizer;
- (c) at least one thermoplastic polymer;
- (d) at least one adhesion promoting agent;
- (e) at least one foaming agent;
- and
- (f) up to about 70% by weight of at least one filler;
- wherein the total constituency is equal to 100.0% by weight.
Dependencies are inferred from the claim text.