US4826909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compatible polymer blends useful as melt adhesives (III)
Assignee: International Group Inc
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Filing: 1988-05-12
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Granted: 1989-05-02
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Expires: 2008-05-12
Abstract
Abstract Compatible polymer blends useful as melt adhesives comprising a copolymer of butene-1 and from about 5.5 to about 20 weight percent of ethylene or propylene, a hydrocarbon tackifier and an amorphous polypropylene.
Inventors
- 👤 Pallavoor R. Lakshmanan
- 👤 Paula J. Carrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:31
CPC Classifications
C; C09; C09J; C09J123/00; C09J123/02; C09J123/18; C09J123/20; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
140 words
A compatible polymer blend useful as a melt adhesive for adherence to polyethylene and polypropylene substrates comprising (1) the copolymer of butene-1 and from about 5.5 to about 20 weight percent of an olefin selected from the group consisting of ethylene and propylene, (2) a hydrocarbon tackifier and (3) an amorphous polypropylene, wherein said copolymer has a melt index in the range of about 0.3 to about 2000 grams/10 minutes, said hydrocarbon tackifier has a ring and ball softening point in the range of about 10° to about 150° C., said amorphous polypropylene has a crystallinity of less than about 10 weight percent and a molecular weight in the range of about 300 to about 50,000 and wherein said components are present in the following amounts: ______________________________________
Weight Percent
______________________________________
Butene-1 Copolymer
10-40
Hydrocarbon Tackifier
20-50
Amorphous Polypropylene
20-70.
______________________________________
Claim 2
Dependent Claim
140 words
A compatible polymer blend useful as a melt adhesive for adherence to polyethylene and polypropylene substrates comprising (1) the copolymer of butene-1 and from about 5.5 to about 20 weight percent of an olefin selected from the group consisting of ethylene and propylene, (2) a hydrocarbon tackifier and (3) an amorphous polypropylene, wherein said copolymer has a melt index in the range of about 0.3 to about 2000 grams/10 minutes, said hydrocarbon tackifier has a ring and ball softening point in the range of about 10° to about 150° C., said amorphous polypropylene has a crystallinity of less than about 10 weight percent and a molecular weight in the range of about 300 to about 50,000 and wherein said components are present in the following amounts: ______________________________________
Weight Percent
______________________________________
Butene-1 Copolymer
10-40
Hydrocarbon Tackifier
20-50
Amorphous Polypropylene
20-70.
______________________________________
Claim 3
Dependent Claim
16 words
The polymer blend of claim 1 wherein said copolymer is a copolymer of butene-1 and ethylene.
Claim 4
Dependent Claim
20 words
The polymer blend of claim 2 wherein said copolymer contains from about 5.5 to about 10 weight percent of ethylene.
Claim 5
Dependent Claim
24 words
The polymer blend of claim 2 wherein said copolymer has a melt index in the range of about 3.0 to about 2000 grams/10 minutes.
Claim 6
Dependent Claim
27 words
The polymer blend of claim 2 wherein said hydrocarbon tackifier has a ring and ball softening point in the range of about 25° to about 120° C.
Claim 7
Dependent Claim
21 words
The polymer blend of claim 2 wherein said amorphous polypropylene is obtained as a byproduct during the production of crystalline polypropylene.
Claim 8
Dependent Claim
27 words
The polymer blend of claim 2 wherein said amorphous polypropylene is obtained as a direct product of the polymerization of propylene without the formation of crystalline polypropylene.
Claim 9
Dependent Claim
33 words
The polymer blend of claim 2 wherein said amorphous polypropylene has a crystallinity of less than about five weight percent and a molecular weight in the range of about 1000 to about 25,000.
Claim 10
Dependent Claim
71 words
The polymer blend of claim 2 wherein said copolymer has a melt index in the range of about 3.0 to about 2000 grams/10 minutes, said hydrocarbon tackifier has a ring and ball softening point in the range of about 25° to about 120° C. and said amorphous polypropylene has a crystallinity of less than about five weight percent and a molecular weight in the range of about 1000 to about 25,000.
Claim 11
Dependent Claim
29 words
The polymer blend of claim 2 wherein said components are present in the following amounts: ______________________________________
Weight Percent
______________________________________
Butene-1 Copolymer 20-40
Hydrocarbon Tackifier
20-40
Amorphous Polypropylene
20-60.
______________________________________
Claim 12
Dependent Claim
17 words
The polymer blend of claim 2 wherein a paraffin wax or a microcrystalline wax is also present.
Claim 13
Dependent Claim
12 words
The polymer blend of claim 2 wherein an antioxidant is also present.
Claim 14
Dependent Claim
20 words
The polymer blend of claim 2 wherein a paraffin wax or a microcrystalline wax and an antioxidant are also present.
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) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |