US4049752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric compositions of styrene and amorphous polyolefins useful in preparing hot melt adhesives
Assignee: Eastman Chemical Co
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Filing: 1976-02-17
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Granted: 1977-09-20
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Expires: 1996-02-17
Abstract
Abstract The present invention relates to novel polymeric compositions of styrene and amorphous polyolefins which include amorphous polypropylene, amorphous propylene/alpha-olefin copolymers and blends thereof and to processes for their preparation. These polymeric compositions are useful in preparing hot melt adhesives.
Inventors
- 👤 Kenneth H. Albers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:49
CPC Classifications
C; C09; C09J; C09J151/00; C09J151/06; C08; C08F; C08F255/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
65 words
A process for preparing polymeric compositions having a styrene content of about 1 to about 90 percent by weight of said compositions which comprises polymerizing styrene in the presence of an amorphous polyolefin having a melt viscosity at 190° C. of from about 100 to about 500,000 centipoise with a peroxide catalyst at a temperature in the range of about 160° to about 300° C.
Claim 2
Dependent Claim
65 words
A process for preparing polymeric compositions having a styrene content of about 1 to about 90 percent by weight of said compositions which comprises polymerizing styrene in the presence of an amorphous polyolefin having a melt viscosity at 190° C. of from about 100 to about 500,000 centipoise with a peroxide catalyst at a temperature in the range of about 160° to about 300° C.
Claim 3
Dependent Claim
31 words
The process of claim 1 wherein said amorphous polyolefin is a member of the group consisting of (1) amorphous polypropylene, (2) amorphous propylene-α-monoolefinic copolymer, or a mixture of (1) and (2).
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein the peroxide catalyst is di-tertiary-butyl peroxide.
Claim 5
Dependent Claim
19 words
The process of claim 3 wherein said temperature is in the range of about 210° to about 300° C.
Claim 6
Dependent Claim
13 words
A process according to claim 4 wherein said amorphous polyolefin is amorphous polypropylene.
Claim 7
Dependent Claim
11 words
A process according to claim 5 wherein said peroxide is di-tert-butyl-peroxide.
Claim 8
Dependent Claim
18 words
A process according to claim 6 wherein said styrene content is from 5 to 60 percent by weight.
Claim 9
Dependent Claim
58 words
A white, nonpigmented polymeric polyolefin composition comprising an amorphous polyolefin which contains about 1 to 90 percent by weight polymerized styrene, has a melt viscosity at 190° C. of 100 to 500,000 centipoise prepared by polymerizing styrene in the presence of said amorphous polyolefin with a peroxide catalyst at a temperature of about 210° to about 300° C.
Claim 10
Dependent Claim
58 words
A white, nonpigmented polymeric polyolefin composition comprising an amorphous polyolefin which contains about 1 to 90 percent by weight polymerized styrene, has a melt viscosity at 190° C. of 100 to 500,000 centipoise prepared by polymerizing styrene in the presence of said amorphous polyolefin with a peroxide catalyst at a temperature of about 210° to about 300° C.
Claim 11
Dependent Claim
19 words
A polymeric polyolefin composition according to claim 8 which contains about 5 to 60 percent by weight polymerized styrene.
References Cited (Backward Citations)
BE553779A
Cited
GB1054062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |