# US 2013/0240291 A1 · Acoustical Sound Proofing Material With Improved Fracture Characteristics and Methods for Manufacturing Same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0240291 A1 - Document ID: US20130240291A1 - Status: Published application - Kind: A1 - Application number: 13/783,165 - Filed: 2013-03-01 - Published: 2013-09-19 - Earliest claimed: 2007-04-06 - Assignees: Serious Energy, Inc. - Inventors: Brandon D. Tinianov - Web page: https://patentgrep.com/patent/US20130240291A1 ## CPC - E04B 1/82: specifically with respect to sound only ({of floors or ceilings E04B9/001;} noise damping in ducts or channels E04F17/00; noise damping in general G10K11/16) - E04B 1/84: Sound-absorbing elements - E04B 1/86: slab-shaped - E04B 2/7409: {special measures for sound or thermal insulation, including fire protection} - E04B 2001/8461: {layered} - Y10T 156/10: Methods of surface bonding and/or assembly therefor - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A material for use in building construction (partition, wall, ceiling, floor or door) that exhibits improved acoustical sound proofing and fracture characteristics optimized for efficient installation. The material comprises a laminated structure having as an integral part thereof one or more layers of viscoelastic material which also functions both as a glue and as an energy dissipating layer; and one or more constraining layers, such as gypsum or cement-based panel products modified for easy fracture. In one embodiment, standard paper-faced wallboard, typically gypsum, comprises the external surfaces of the laminated structure with the inner surface of said wallboard being bare with no paper or other material being placed thereon. The resulting structure improves the attenuation of sound transmitted through the structure while also allowing installation of the sound proofing material as efficiently as the installation of standard material when the sound proofing material is used alone or incorporated into a partition assembly. ## Claims ### Claim at position 1 1-41. (canceled) ### Claim 42 A laminated building structure, comprising: a first gypsum board having two surfaces, said two surfaces including a first outer clad surface and a first inner unclad surface; a first layer of viscoelastic glue placed directly on the first inner unclad surface; and a second gypsum board located proximate to said first layer of viscoelastic glue, said second gypsum board having two surfaces, said two surfaces including a second outer clad surface and a second inner unclad surface. ### Claim 43 (depends on 42) The structure of claim 42, wherein said second gypsum board directly contacts said first layer of viscoelastic glue. ### Claim 44 (depends on 42) The structure of claim 42, wherein said structure is adapted for use in walls, ceilings, floors or other building partitions to attenuate sound. ### Claim 45 (depends on 42) The structure of claim 42, wherein said first outer clad surface is paper. ### Claim 46 (depends on 42) The structure of claim 42, wherein said first outer clad surface is nonwoven fiberglass. ### Claim 47 (depends on 42) The structure of claim 42, further including: a constraining layer formed from a low tensile strength material placed directly on said first layer of viscoelastic glue, said constraining layer having a first constraining layer surface in contact with said first layer of viscoelastic glue and a second constraining layer surface; and a second layer of viscoelastic glue located directly on the second constraining layer surface, wherein said second gypsum board directly contacts said second layer of viscoelastic glue. ### Claim 48 (depends on 42) The structure of claim 42, wherein said structure has a scored flexural strength of less than about 50 pounds force when one of the first or second outer clad surfaces is scored. ### Claim 49 (depends on 48) The structure of claim 48, wherein said structure has a scored flexural strength of about 22 pounds force when one of the first or second outer clad surfaces is scored. ### Claim 50 (depends on 42) The structure of claim 42, wherein said structure has a Sound Transmission Class (“STC”) value of greater than about 34. ### Claim 51 (depends on 50) The structure of claim 50, wherein said structure has an STC of about 49. ### Claim 52 A laminated, sound-attenuating structure, comprising: a first gypsum board having two surfaces, said two surfaces including a first outer clad surface and a first inner low-tensile clad surface; a first layer of viscoelastic glue located directly on the first inner low-tensile clad surface; and a second gypsum board located proximate said first layer of viscoelastic glue, said second gypsum board having two surfaces, said two surfaces including a second outer clad surface and a second inner low-tensile clad surface. ### Claim 53 (depends on 52) The structure of claim 52, wherein said first inner low-tensile clad surface includes a thin film or veil having a tensile strength of about 6 psi or less. ### Claim 54 (depends on 52) The structure of claim 52, further including: a constraining layer formed from a low tensile strength material and located on said first layer of viscoelastic glue, said constraining layer having a first constraining layer surface in direct contact with said first layer of viscoelastic glue and a second constraining layer surface; and a second layer of viscoelastic glue located on said second constraining layer surface, wherein said second gypsum board directly contacts said second layer of viscoelastic glue. ### Claim 55 (depends on 54) The structure of claim 54, wherein said constraining layer has a tensile strength of about 10 psi or less. ### Claim 56 (depends on 52) The structure of claim 52, wherein said structure has a scored flexural strength of less than about 50 pounds force when one of the first or second outer clad surfaces have been scored, and wherein said finished laminated, sound-attenuating structure has a Sound Transmission Class (“STC”) value of greater than about 34. ### Claim 57 (depends on 52) The structure of claim 52, wherein said structure is adapted for use in walls, ceilings, floors or other building partitions to attenuate sound. ### Claim 58 A laminated, sound-attenuating structure, comprising: a gypsum board having two surfaces, said two surfaces including an outer paper-clad surface and an inner unclad surface; a first layer of viscoelastic glue located directly on the inner unclad surface; and a cement-based board located proximate said first layer of viscoelastic glue, said cement-based board having two surfaces, said two surfaces including an outer cement surface and an inner cement surface. ### Claim 59 (depends on 58) The structure of claim 58, wherein the cement-based board includes calcium silicate, magnesium oxide, or a phosphate. ### Claim 60 (depends on 58) The structure of claim 58, further comprising: a low tensile strength constraining layer located over said first layer of viscoelastic glue, said constraining layer having two surfaces, including a first constraining layer surface in direct contact with said first layer of viscoelastic glue and a second constraining layer surface; and a second layer of viscoelastic glue located on said second constraining layer surface.