Sound dampening adhesive

• US 20050080193A1
• Filed: 10/08/2004
• Published: 04/14/2005
• Est. Priority Date: 10/08/2003
• Status: Abandoned Application

• Current Assignee: Avery Dennison Corporation
• Original Assignee: Avery Dennison Corporation
• Inventors: Vorsselmans, Jos, Wouters, Dominique, Huang, Zhisong
• Application Number:
  US10/961,873
• Publication Number:
  US 20050080193A1
• Time in Patent Office: Days
• US Class Current: 525/191
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 93/04 Rosin
• CPC Class Codes: C09J 133/04 Homopolymers or copolymers of esters C09J143/04 takes precedence

Abstract

Pressure sensitive adhesive compositions that exhibit sound/vibration dampening properties are provided. The pressure sensitive adhesive composition can be tailored to provide sound/vibration dampening within a desired temperature range at a specified frequency.

Claims

1. A damping pressure sensitive adhesive comprising a blend of:

40-95% by weight of an acrylic resin and 5-60% by weight of a thermoplastic modifying polymer having a Tg of at least 50°

C.;

wherein the pressure sensitive adhesive has a material loss factor equal to or greater than about 0.8 at at least one frequency in the range of about 100 Hz to about 10 kHz and within a temperature span of at least 35°

C. within the temperature region above 35°

C.

2. The pressure sensitive adhesive of claim 1 comprising an amount of modifying polymer within the range of about 10 to about 40% by weight.

3. The pressure sensitive adhesive of claim 1 comprising an amount of modifying polymer within the range of about 20 to about 30% by weight.

4. The pressure sensitive adhesive of claim 1 wherein the modifying polymer comprises an acrylic resin.

5. The pressure sensitive adhesive of claim 1 wherein the modifying polymer comprises a polyphenylene ether.

6. The pressure sensitive adhesive of claim 1 wherein the modifying polymer comprises a rosin based resin.

7. The pressure sensitive adhesive of claim 1 wherein the modifying polymer comprises a terpene or terpene phenolic based resin.

8. The pressure sensitive adhesive of claim 1 wherein the modifying polymer comprises a polyester copolymer.

9. The pressure sensitive adhesive of claim 1 further comprising a crosslinking agent.

10. The pressure sensitive adhesive of claim 1 wherein the adhesive has a material loss factor equal to or greater than about 0.8 at at least one frequency in the range of about 100 Hz to about 10 kHz and within a temperature span of at least 35°

C. within the temperature region above 40°

C.

11. The pressure sensitive adhesive of claim 1 wherein the adhesive has a material loss factor equal to or greater than about 0.8 at at least one frequency in the range of about 100 Hz to about 10 kHz and within a temperature span of at least 35°

C. within the temperature region above 70°

C.

19. A damping article comprising the adhesive of claim 1.

12. A pressure sensitive adhesive useful for damping purposes comprising a blend of:

60-95% by weight of a copolymer comprising on a copolymerized basis from about 55% to about 85% by weight of a monomer selected from the group consisting of alkyl acrylate esters and alkyl methacrylate esters containing from 4 to about 12 carbon atoms in the alkyl group and mixtures thereof, from 0 to about 35% by weight of an alkyl acrylate or methacrylate ester containing less than 4 carbon atoms in the alkyl group, from 0 to about 2% by weight of a glycidyl monomer, from about 0 to about 10% by weight of an N-vinyl lactam, and from 0 to about 15% by weight of an unsaturated carboxylic acid; and

5-40% by weight of a thermoplastic modifying polymer having a Tg of at least 50°

C.

13. The pressure sensitive adhesive of claim 12 wherein the copolymer comprises on a copolymerized basis from about 55% to about 85% by weight of a monomer selected from the group consisting of alkyl acrylate esters and alkyl methacrylate esters containing from 4 to about 12 carbon atoms in the alkyl group and mixtures thereof, from 0 to about 35% by weight of an alkyl acrylate or methacrylate ester containing less than 4 carbon atoms in the alkyl group, from 0.01 to about 2% by weight of a glycidyl monomer, from about 1 to about 10% by weight of an N-vinyl lactam, and from 0 to about 15% by weight of an unsaturated carboxylic acid.

14. A damping adhesive construction comprising:

a damping adhesive comprising a blend of;

40-95% by weight of an acrylic adhesive; and

5-60% by weight of a thermoplastic modifying polymer having a Tg of at least 50°

C.;

wherein the pressure sensitive adhesive has a material loss factor equal to or greater than about 0.8 at at least one frequency in the range of about 100 Hz to about 10 kHz and within a temperature span of at least 35°

C. within the temperature region above 35°

C.; and

at least one substrate, wherein the adhesive is adhered to or laminated to the substrate.

15. The adhesive construction of claim 14 wherein the substrate comprises a release liner.

16. The adhesive construction of claim 14 wherein the substrate comprises a polymeric film.

17. The adhesive construction of claim 14 wherein the substrate comprises a metal.

18. The adhesive construction of claim 14 wherein the construction comprises a transfer tape.