US5317070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syndiotactic hot melt adhesive
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1992-08-25
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Granted: 1994-05-31
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Expires: 2012-08-25
Abstract
Abstract A hot melt adhesive including syndiotactic polypropylene having a polymer chain of at least 80% racemic dyads and having a melting point of about 100° C. to 180° C.
Inventors
- 👤 Patrick Brant
- 👤 Kenneth O. McElrath, Jr.
- 👤 Martha H. Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:21
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/10; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
44 words
A hot melt adhesive comprising tackifier and syndiotactic propylene homopolymer or copolymer, said homopolymer or the propylene segment of the copolymer comprising at least about 80% racemic dyads and said homopolymer or copolymer having a melting point of from 100° C. to 180° C.
Claim 2
Dependent Claim
44 words
A hot melt adhesive comprising tackifier and syndiotactic propylene homopolymer or copolymer, said homopolymer or the propylene segment of the copolymer comprising at least about 80% racemic dyads and said homopolymer or copolymer having a melting point of from 100° C. to 180° C.
Claim 3
Dependent Claim
22 words
The hot melt adhesive of claim 1, wherein said homopolymer or propylene segment of the copolymer comprises at least 85% racemic dyads.
Claim 4
Dependent Claim
13 words
The hot melt adhesive of claim 1, wherein said copolymer comprises ethylene comonomer.
Claim 5
Dependent Claim
21 words
The hot melt adhesive of claim 1, wherein the comonomer of the copolymer is a C 4 to C 12 alpha-olefin.
Claim 6
Dependent Claim
23 words
The hot melt adhesive of claim 1, wherein the copolymer comonomer is selected from the group consisting of 1-pentene, 1-hexene, 1-heptene and 1-octene.
Claim 7
Dependent Claim
12 words
The hot melt adhesive of claim 1, wherein said copolymer comprises 1-hexene.
Claim 8
Dependent Claim
18 words
The hot melt adhesive of claim 4, wherein said copolymer comprises 1 to 50 weight % of comonomer.
Claim 9
Dependent Claim
18 words
The hot melt adhesive of claim 4, wherein said copolymer comprises 3 to 20 weight % of comonomer.
Claim 10
Dependent Claim
21 words
The hot melt adhesive of claim 4, wherein the comonomer is hexene-1 and is present at 3 to 20 weight %.
Claim 11
Dependent Claim
17 words
The hot melt adhesive of claim 1, wherein the copolymer comprises 5 to 18 weight % hexene-1.
Claim 12
Dependent Claim
18 words
The hot melt adhesive of claim 1, wherein the tackifier is present at 1 to 70 weight %.
Claim 13
Dependent Claim
16 words
The adhesive of claim 1, wherein the tackifier is present at 40 to 60 weight %.
Claim 14
Dependent Claim
12 words
The adhesive of claim 1, wherein the tackifier is a hydrogenated resin.
Claim 15
Dependent Claim
13 words
The adhesive of claim 1, wherein the tackifier is a hydrogenated cyclic resin.
Claim 16
Dependent Claim
23 words
The adhesive of claim 1, wherein the tackifier is an aliphatic resin with a softening point of about 12° to about 100° C.
Claim 17
Dependent Claim
14 words
The adhesive of claim 1, where the syndiotactic propylene homopolymer or copolymer is deashed.
Claim 18
Dependent Claim
15 words
The holt melt adhesive of claim 1, wherein the propylene polymer is said propylene homopolymer.
Claim 19
Dependent Claim
65 words
A hot melt adhesive produced by a process comprising combining tackifier with syndiotactic propylene homopolymer or copolymer, said homopolymer or the propylene segment of the copolymer comprising at least about 80% racemix dyads and said homopolymer or copolymer further having a melting point of from 100° to 180° C. wherein the hot melt adhesive is characterized by an open time of 5 minutes or more.
Claim 20
Dependent Claim
65 words
A hot melt adhesive produced by a process comprising combining tackifier with syndiotactic propylene homopolymer or copolymer, said homopolymer or the propylene segment of the copolymer comprising at least about 80% racemix dyads and said homopolymer or copolymer further having a melting point of from 100° to 180° C. wherein the hot melt adhesive is characterized by an open time of 5 minutes or more.
Claim 21
Dependent Claim
28 words
The product of claim 18, wherein the hot melt adhesive is characterized by a peel strength after 24 hours at or above the peel strength at 10 minutes.
Claim 22
Dependent Claim
30 words
The product of claim 18, wherein the hot melt adhesive is characterized by a peel strength after 24 hours about the same or above the peel strength at 10 minutes.
Claim 23
Dependent Claim
22 words
The product of claim 18, wherein the hot melt adhesive is characterized by an open time of about ten minutes or more.
References Cited (Backward Citations)
US3258455A
Cited
US3305538A
Cited
US3700758A
Cited
US4937138A
Cited
US4892851A
Cited
EP0351392A2
Cited
EP0387691A1
Cited
EP0387690A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |