IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0634222
(2009-12-09)
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등록번호 |
US-8283400
(2012-10-09)
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발명자
/ 주소 |
- Rodriguez, George
- Shipley, Fran A.
- Jiang, Peijun
|
출원인 / 주소 |
- ExxonMobil Chemical Patents Inc.
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인용정보 |
피인용 횟수 :
0 인용 특허 :
46 |
초록
▼
An adhesive and method for hot melt adhesive application. The adhesive comprises polyolefin base polymer and from 1 to 15 wt % of a at least two wax components, based on the total weight of the polyolefin base polymer and the at least two wax components, wherein the at least two wax components compr
An adhesive and method for hot melt adhesive application. The adhesive comprises polyolefin base polymer and from 1 to 15 wt % of a at least two wax components, based on the total weight of the polyolefin base polymer and the at least two wax components, wherein the at least two wax components comprise a first wax component having a relatively low weight average molecular weight at least 1000 g/mole less than a second wax component having a relatively high weight average molecular weight. The adhesive may have at least 50% fiber tear at 25° C., and a characteristic set time of less than 3 seconds. The adhesive may also include from 1 to 10 wt % of at least one functionalized polyolefin.
대표청구항
▼
1. An adhesive comprising a polyolefin base polymer and from 1 to 15 wt % of at least two wax components, based on the total weight of the polyolefin base polymer and the at least two wax components; wherein the at least two wax components comprise a first wax component and a second wax component wh
1. An adhesive comprising a polyolefin base polymer and from 1 to 15 wt % of at least two wax components, based on the total weight of the polyolefin base polymer and the at least two wax components; wherein the at least two wax components comprise a first wax component and a second wax component wherein the weight average molecular weight of the second wax component (Mwwax2) is at least 1000 g/mole greater relative to the weight average molecular weight of the first wax component (Mwwax1), and wherein MWwax1 is less than about 4000 g/mole and MWwax2 is greater than about 5000 g/mole. 2. The adhesive of claim 1, wherein the adhesive has the following properties: (a) at least 50% fiber tear at 25° C. using Inland paper board as a substrate; and(b) a set time of less than 3 seconds. 3. The adhesive of claim 1, further comprising from 1 to 10 wt % of at least one functionalized polyolefin. 4. The adhesive of claim 1, further comprising from 1 to 6 wt % of at least one functionalized polyolefin. 5. The adhesive of claim 3, wherein said functionalized polyolefin has an acid number from 2 to 100. 6. The adhesive of claim 3, wherein said functionalized polyolefin comprises maleated polypropylene. 7. The adhesive of claim 1, wherein the polyolefin base polymer is functionalized. 8. An adhesive comprising a polyolefin base polymer and from 1 to 15 wt % of at least two wax components, based on the total weight of the polyolefin base polymer and the at least two wax components, wherein the adhesive comprises at least 80 wt % of the polyolefin base polymer, wherein the polyolefin base polymer comprises a propylene copolymer comprising at least 80 wt % of units derived from propylene and from about 2 to about 15 wt % of units derived from at least one C6 to C10 alpha-olefin, wherein the copolymer has a molecular weight of less than 100,000 and a heat of fusion between about 10 and about 70 J/g, wherein the at least two wax components comprise a first wax component and a second wax component wherein the weight average molecular weight of the second wax component (Mwwax2) is at least 1000 g/mole greater relative to the weight average molecular weight of the first wax component (Mwwax1), and wherein Mwwax1 is less than about 4000 g/mole and Mwwax2 is greater than about 5000 g/mole. 9. The adhesive of claim 8, wherein the propylene copolymer comprises from about 6 wt % to about 12 wt % of units derived from the at least one C6 to C10 alpha-olefin. 10. The adhesive of claim 8, wherein the propylene copolymer consists essentially of units derived from propylene and said at least one C6 to C10 alpha-olefin. 11. The adhesive of claim 8, wherein the C6 to C10 alpha-olefin comprises hexene-1. 12. The adhesive of claim 8, wherein the copolymer has an Mw of at least 10,000 and less than 50,000 g/mol. 13. The adhesive of claim 8, wherein Mw/Mn of the copolymer is between about 1.5 and about 10. 14. The adhesive of claim 8, wherein said copolymer has a heat of fusion between about 10 and about 60 J/g. 15. The adhesive of claim 1, wherein the polyolefin base polymer comprises polypropylene having a weight average molecular weight of from 10,000 to 100,000 g/mol and a branching index (g′) from 0.4 to 0.95 measured at the Mz of the polypropylene. 16. The adhesive of claim 1 comprising from 6 to 15 wt % of at least two wax components. 17. The adhesive of claim 1, wherein Mwwaxi is from about 450 to about 4000 g/mole and Mwwax2 is from about 5000 to about 20,000 g/mole. 18. The adhesive of claim 1, wherein a weight ratio of the first wax component to the second wax component in the at least two wax components is from about 10:90 to about 90:10. 19. The adhesive of claim 1, wherein a weight ratio of the first wax component to the second wax component in the at least two wax components is from about 30:70 to about 70:30. 20. The adhesive of claim 1, wherein the first wax component has a Brookfield viscosity at 190° C. of 100 mPa-s or less and the second wax component has a viscosity at 190° C. of 190 mPa-s or more. 21. The adhesive of claim 1, wherein said adhesive has a Shear Adhesion Fail Temperature (SAFT) of at least 100° C. 22. The adhesive of claim 1, wherein the polyolefin base polymer has a viscosity at 190° C. in the range from 1000 to 10,000 mPa-s and the adhesive has a viscosity at 177° C. from 500 to 2000 mPa-s. 23. A method of joining substrates, comprising maintaining a reservoir of molten hot melt adhesive, applying the hot melt adhesive from the reservoir to a first substrate, placing a second substrate in contact with the adhesive applied to the first substrate, and applying adhering pressure for a period of time about equal to or greater than the characteristic set time of the adhesive, characterized by introducing into the reservoir an adhesive comprising a polyolefin base polymer and from 1 to 15 wt % of at least two wax components, based on the total weight of the polyolefin base polymer and the at least two wax components; wherein the at least two wax components comprise a first wax component and a second wax component wherein the weight average molecular weight of the second wax component (Mwwax2) is at least 1000 glmole greater relative to the weight average molecular weight of the first wax component (Mwwax1) and wherein Mwwax1 is less than about 4000 g/mole and Mwwax2 is greater than about 5000 g/mole. 24. The method of claim 23, wherein the time period for application of the adhering pressure is 2 seconds or less.
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