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US 11,692,112 B2Granted
Low temperature vibration damping pressure sensitive adhesives and constructions
Assignee3M Innovative Properties Company
InventorsJason D. Clapper, Arlin L. Weikel, Thu-Van T. Tran, Kevin M. Lewandowski, David A. Gries, Daniel J. Renninger
Life of this patent
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Abstract
Described are viscoelastic damping materials and constructions which may demonstrate low temperature performance and adhesion and which may be used in making vibration damping composites. Viscoelastic damping materials and constructions may include polymers or copolymers of monomers according to formula I: CH2═CHR1—COOR2 [I] wherein R1 is H, CH3 or CH2CH3 and R2 is a branched alkyl group containing 12 to 32 carbon atoms.
Claims16
A viscoelastic construction comprising:
- a) a viscoelastic layer comprising a copolymer of at least one monomer according to formula I:
- CH2═CR1—COOR2 [I]
- wherein R1 is H, CH3 or CH2CH3 and R2 is a branched alkyl group containing 12 to 32 carbon atoms, and at least one comonomer selected from the group consisting of acrylic acid, methacrylic acid, ethacrylic acid, acrylic esters, methacrylic esters, and ethacrylic esters, wherein the at least one monomer according to formula I is present in an amount ranging from 75% to 99% by weight relative to the overall weight of the copolymer and further wherein the viscoelastic layer does not include any adhesion-enhancing particulate materials;
- bound to
- b) at least one PSA layer comprising a pressure sensitive adhesive,
- wherein the viscoelastic layer exhibits a tan delta of greater than 0.5 as measured by Dynamic Mechanical Analysis at −55° C. and 10 Hz.
3 more elements
A viscoelastic construction comprising:
- a) a viscoelastic layer consisting essentially of a copolymer of at least one monomer according to formula I:
- CH2═CR1—COOR2 [I]
- wherein R1 is H, CH3 or CH2CH3 and R2 is a branched alkyl group containing 12 to 32 carbon atoms, and at least one comonomer selected from the group consisting of acrylic acid, methacrylic acid, ethacrylic acid, acrylic esters, methacrylic esters, and ethacrylic esters, wherein the at least one monomer according to formula I is present in an amount ranging from 75% to 99% by weight relative to the overall weight of the copolymer;
- bound to
- b) at least one PSA layer comprising a pressure sensitive adhesive,
- wherein the viscoelastic layer exhibits a tan delta of greater than 0.5 as measured by Dynamic Mechanical Analysis at −55° C. and 10 Hz.
3 more elements
Dependencies are inferred from the claim text.