US5013785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive composition comprising poly-4-methyl-1-pentene as tackifier
Assignee: Mitsui Chemicals Inc
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Filing: 1987-10-08
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Granted: 1991-05-07
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Expires: 2007-10-08
Abstract
Abstract In the present invention, a polymer having a number average molecular weight (Mn) of from 200 to 40,000 and a glass transition point of from -75° C. to +10° C. which is obtained by the cationic polymerization of a branched alpha-olenin is used as a tackifier (a tacky producer) for a hot melt adhesive or a pressure-sensitive adhesive. An adhesive composition containing the polymer described above as a tackifier has excellent heat resistance, hue, weather resistance, and the like and has such excellent characteristics that its odor is weak.
Inventors
- 👤 Kinya Mizui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:59
CPC Classifications
C; C09; C09J; C09J201/00; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04; Y; Y10; Y10S; Y10S525/00; Y10S525/918
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
69 words
A pressure-sensitive adhesive composition comprising a rubbery hydrocarbon polymer or polychloroprene as a base resin and from 20 to 200 parts by weight of a tackifier per 100 parts by weight of the base resin, the improvement wherein said tackifier comprises a cationically polymerized poly-4-methyl-1-pentene having a number average molecular weight (Mn) of from 200 to 40,000 and a glass transition point of from -75° C. to +10° C.
Claim 2
Dependent Claim
69 words
A pressure-sensitive adhesive composition comprising a rubbery hydrocarbon polymer or polychloroprene as a base resin and from 20 to 200 parts by weight of a tackifier per 100 parts by weight of the base resin, the improvement wherein said tackifier comprises a cationically polymerized poly-4-methyl-1-pentene having a number average molecular weight (Mn) of from 200 to 40,000 and a glass transition point of from -75° C. to +10° C.
Claim 3
Dependent Claim
65 words
The pressure sensitive adhesive composition according to claim 1, wherein said base resin is selected from the group consisting of a natural rubber, a styrene-butadiene copolymer rubber, polybutadiene, polyisoprene, polyisobutylene, a butyl rubber, polychloroprene, an ethylene-propylene copolymer rubber, an ethylene-propylene-alpha-olefin copolymer rubber, an ethylene-propylene-diene copolymer rubber, a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, a hydrogenated styrene-butadiene-styrene block copolymer, and a hydrogenated styrene-isoprene-styrene block copolymer.
Claim 4
Dependent Claim
56 words
The pressure sensitive-adhesive composition according to claim 1, wherein said poly-4-methyl-1-pentene has a number average molecular weight (Mn) of from 300 to 30,000, a ratio of a weight average molecular weight (Mw) to the number average molecular weight (Mn) of from 1.3 to 4.0, and a glass transition point of from -60° C. to -30° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |