Mass and spring systems for soundproofing
First Claim
1. Mass and spring system for soundproofing, particularly in vehicles, comprising a bending-soft heavy plastic layer as the mass and a soft layer as the spring and which is applied to (a sound radiating surface or wall,) characterized in that the soft layer serving as a spring is a gel of 10 to 50% by weight of an organic polymer or silicone polymer and 50 to 90% by weight of a plasticizer compatible therewith, which at room temperature has a modulus of elasticity E'"'"'≦
- 5×
105 Pa and an internal loss factor d≧
0.5.
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Accused Products
Abstract
A mass and spring system for soundproofing, particularly in vehicles, comprises a bending-soft heavy plastic layer as the mass and a soft layer as the spring, which is applied to the sound radiating surface or wall and which is a gel of 10 to 50% by weight of an organic polymer or silicone polymer and 50 to 90% by weight of a plasticizer compatible therewith, which at room temperature has a modulus of elasticity E'"'"'≦5×105 Pa and an internal loss factor d≧0.5.
46 Citations
14 Claims
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1. Mass and spring system for soundproofing, particularly in vehicles, comprising a bending-soft heavy plastic layer as the mass and a soft layer as the spring and which is applied to (a sound radiating surface or wall,) characterized in that the soft layer serving as a spring is a gel of 10 to 50% by weight of an organic polymer or silicone polymer and 50 to 90% by weight of a plasticizer compatible therewith, which at room temperature has a modulus of elasticity E'"'"'≦
- 5×
105 Pa and an internal loss factor d≧
0.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- 5×
-
10. Multilayer system for soundproofing purposes, particularly for solid-borne sound insulation and airborne sound insulation, comprising a plurality of flexurally rigid layers and at least one deadening, soft intermediate layer, characterized in that the intermediate layer is a gel of 10 to 50% by weight of an organic polymer or silicone polymer and 50 to 90% by weight of a plasticizer compatible therewith, which at room temperature has a modulus of elasticity E'"'"'≦
- 5×
105 Pa and an internal loss factor d≧
0.5. - View Dependent Claims (11)
- 5×
-
12. A mass and spring system for soundproofing a sound radiating surface or wall, comprising a bending-soft heavy plastic layer as the mass and a soft layer as the spring, wherein the soft layer serving as a spring is a gel selected from the group consisting of
a) 30 to 50% by weight of a polyurethane polymer and 50 to 70% by weight of a plasticizer compatible therewith; -
b) a plastigel comprised of 10 to 20% by weight of polymer selected from the group comprising of polyvinyl chloride homopolymer or copolymer, methylmethacrylate copolymer and styrene homopolymer or copolymer, and 80 to 90% by weight of plasticizer compatible therewith; and c) 15 to 40% by weight of a moisture or heat-hardening polydimethylsiloxane and 60 to 85% by weight of a silicone oil as a plasticizer; and which at room temperature has a modulus of elasticity of E'"'"'≦
5×
105 Pa and an internal loss factor d≧
0.5. - View Dependent Claims (13, 14)
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Specification