Polyol-epoxide polymers for NVH damping applications

Patent metadata

Field	Value
Publication number	US-11970571-B2
Application number	US-202117510637-A
Country	US
Kind code	B2
Filing date	Oct 26, 2021
Priority date	Apr 26, 2019
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

Noise, vibration, or harshness (NVH) properties of an industrial or consumer product are reduced by incorporating therein an effective amount of a polyether- or polyester-epoxide polymer (PEEP) composition. The PEEP compositions are one-component or two-component reaction products of a polyepoxide compound and a polyol composition. The PEEP compositions have a glass-transition temperature within the range of −50° C. to 50° C. and a loss factor of at least 0.5 by ASTM D5992 over a temperature range of at least 15 Celsius degrees at one or more frequencies within the range of 0.1 to 10,000 Hz. The PEEP compositions provide NVH damping over a broad temperature range, have improved flexibility compared with conventional epoxy technologies, avoid amine and isocyanate reactants, and can be tailored to meet target specifications.

First claim

We claim:

1. A method which comprises reducing noise, vibration, or harshness properties of an industrial or consumer product by incorporating therein an effective amount of a polyether- and polyester-epoxide polymer (PEEP) composition, wherein the PEEP composition comprises a one-component or two-component reaction product of:
(a) a polyepoxide compound having an equivalent weight within the range of 115 to 250 g/eq.; and
(b) a polyol composition comprising:
(i) a polyester polyol having a hydroxyl value within the range of 28 to 400 mg KOH/g, an average hydroxyl functionality within the range of 1.5 to 4.0, and an acid number less than 5 mg KOH/g; and
(ii) a polyether polyol having a hydroxyl value within the range of 28 to 800 mg KOH/g and an average hydroxyl functionality within the range of 1.8 to 8.0;
wherein the ratio of epoxy equivalents of the polyepoxide compound to hydroxyl equivalents of the polyol composition is within the range of 0.5 to 4.0;
wherein the PEEP composition has a glass-transition temperature as measured by differential scanning calorimetry within the range of −50° C. to 50° C.; and
wherein the PEEP composition has a loss factor of at least 0.5 by ASTM D5992 over a temperature range of at least 15 Celsius degrees at one or more frequencies within the range of 0.1 to 10,000 Hz.

2. The method of claim 1 wherein the polyepoxide compound is an aromatic polyepoxide.

3. The method of claim 2 wherein the aromatic polyepoxide is a reaction product of a bisphenol and epichlorohydrin having an equivalent weight within the range of 185 to 200 g/eq.

4. The method of claim 1 wherein the polyepoxide compound is an aliphatic polyepoxide.

5. The method of claim 1 wherein the polyester polyol is one or more aromatic polyester polyols.

6. The method of claim 1 wherein the polyester polyol has a hydroxyl value within the range of 60 to 350 mg KOH/g and an average hydroxyl functionality within the range of 1.8 to 3.5.

7. The method of claim 1 wherein the polyether polyol has a hydroxyl value within the range of 150 to 550 mg KOH/g and an average hydroxyl functionality within the range of 3.5 to 8.0.

8. The method of claim 1 wherein the ratio of epoxy equivalents of the polyepoxide compound to hydroxyl equivalents of the polyol composition is within the range of 0.6 to 3.0.

9. The method of claim 1 wherein the ratio of epoxy equivalents of the polyepoxide compound to hydroxyl equivalents of the polyol composition is within the range of 0.8 to 2.0.

10. The method of claim 1 wherein the PEEP composition has a glass-transition temperature within the range of −40° C. to 40° C.

11. The method of claim 1 wherein the PEEP composition has a glass-transition temperature within the range of −30° C. to 30° C.

12. The method of claim 1 wherein PEEP composition is curable within seven days at temperatures within the range of 0° C. to 200° C.

13. The method of claim 1 wherein the PEEP composition has a loss factor of at least 0.6 by ASTM D5992 over a temperature range of at least 25 Celsius degrees measured at a frequency in the range of 0.1 to 10 Hz.

14. The method of claim 1 wherein the PEEP composition has a loss factor of at least 0.6 by ASTM D5992 over a temperature range of at least 50 Celsius degrees measured at a frequency in the range of 0.1 to 10 Hz.

15. The method of claim 1 wherein the PEEP composition has a loss factor of at least 1.0 by ASTM D5992 measured at a frequency in the range of 0.1 to 10 Hz.

16. The method of claim 1 wherein the loss factor applies at a temperature within the range of −50° C. to 200° C.

17. The method of claim 1 wherein the loss factor applies at a temperature within the range of −40° C. to 100° C.

18. The method of claim 1 wherein the PEEP composition has, as measured by ASTM D5992 at a frequency of 1 Hz, a loss factor of at least 1.0, a temperature at the onset of tan delta ≥0.5 less than 0° C., and a range over which tan delta is 0.5 of at least 15 Celsius degrees.

19. The method of claim 1 wherein the PEEP composition has, as measured by ASTM D5992 at a frequency of 1 Hz, a loss factor of at least 1.0, a temperature at the onset of tan delta ≥0.5 less than −15° C., and a range over which tan delta is 0.5 of at least 25 Celsius degrees.

20. The method of claim 1 wherein the PEEP composition is produced in the presence of a catalyst selected from the group consisting of boron trifluoride-based catalysts and aluminum triflate-based catalysts.

21. The method of claim 1 wherein the PEEP composition is formulated as a one-component, storage-stable, heat-activated system.

22. The method of claim 1 wherein the PEEP composition is formulated as a two-component system.

23. The method of claim 1 further comprising forming a construction or transportation adhesive comprising the PEEP composition for the industrial or consumer product.

24. The method of claim 1 wherein the industrial or consumer product is a motor vehicle, watercraft, aircraft, train, subway car, or snowmobile.

25. The method of claim 1 wherein the industrial or consumer product is a household appliance, HVAC unit, wind turbine, electronic device, power tool, lawnmower, leaf blower, snow blower, or sporting good.

Assignees

• Stepan Co

Inventors

• O'Brien Michael E
• Kaplan Warren A
• Wolek Sarah
• Westfall Jennifer S
• Gang Calvin

Classifications

• C08G59/063 Primary

  with epihalohydrins · CPC title

• C08G59/245

  aromatic · CPC title

• C08G59/686

  containing nitrogen · CPC title

• C08G59/72

  Complexes of boron halides · CPC title

• C08L67/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title