US4314039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene composition containing a 1.3,2.4-di(alkylbenzylidene) sorbitol
Assignee: Mitsui Chemicals Inc
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Filing: 1980-08-06
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Granted: 1982-02-02
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Expires: 2000-08-06
Abstract
Abstract A composition having improved transparency and being substantially free from a bleeding phenomenon comprising 100 parts by weight of polypropylene and 0.005 to 8 parts by weight of a 1.3,2.4-di(alkylbenzylidene) sorbitol with each alkyl group having 2 to 18 carbon atoms.
Inventors
- 👤 Yoichi Kawai
- 👤 Katsuyoshi Sasagawa
- 👤 Masami Maki
- 👤 Hozumi Ueda
- 👤 Masayoshi Miyamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/1575
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
51 words
A composition comprising 100 parts by weight of isotactic polypropylene or crystalline copolymers of propylene and ethylene or propylene and alpha-olefins or mixtures thereof and 0.005 to 8 parts by weight of a 1.3,2.4-di(alkylbenzylidene) sorbitol of the formula ##STR2## wherein R represents an alkyl group having 2 to 18 carbon atoms.
Claim 2
Dependent Claim
51 words
A composition comprising 100 parts by weight of isotactic polypropylene or crystalline copolymers of propylene and ethylene or propylene and alpha-olefins or mixtures thereof and 0.005 to 8 parts by weight of a 1.3,2.4-di(alkylbenzylidene) sorbitol of the formula ##STR2## wherein R represents an alkyl group having 2 to 18 carbon atoms.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein the alkyl group R has 2 to 8 carbon atoms.
Claim 4
Dependent Claim
16 words
The composition of claim 2 wherein the alkyl group R has 2 to 4 carbon atoms.
Claim 5
Dependent Claim
21 words
The composition of claim 2 or 3 wherein the amount of the 1.3,2.4-di(alkylbenzylidene) sorbitol is 0.05 to 1 part by weight.
Claim 6
Dependent Claim
14 words
The composition of claim 1 comprising a crystalline copolymer of propylene and an α-olefin.
Claim 7
Dependent Claim
13 words
The composition of claim 1 comprising a crystalline copolymer of propylene and ethylene.
Claim 8
Dependent Claim
10 words
The composition of claim 1 comprising a homopolymer of propylene.
Claim 9
Dependent Claim
17 words
The composition of claim 1 further including an antioxidant, and wherein said composition is in pellet form.
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) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |