US4532280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystalline polyolefin-type resin compositions
Assignee: New Japan Chemical Co Ltd
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Filing: 1984-06-11
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Granted: 1985-07-30
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Expires: 2004-06-11
Abstract
Abstract This invention provides a crystalline polyolefin-type resin composition comprising a crystalline polyolefin-type resin and two kinds of nucleating agents, i.e., a di(p-substituted-benzylidene)sorbitol (I) and an o-substituted benzylidene-p-substituted benzylidene sorbitol (II) which are used in an amount of about 0.08 to about 1 part by weight per 100 parts by weight of the resin, and the proportion of (II) to (I) is about 0.5 to about 8 parts by weight of (II) per 100 parts by weight of (I). The composition can give molded articles having high transparency and other properties and free from bleeding-out.
Inventors
- 👤 Toshiaki Kobayashi
- 👤 Masafumi Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/1575
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
A crystalline polyolefin resin composition comprising a crystalline polyolefin resin, a di(p-substituted benzylidene)sorbitol represented by the formula ##STR3## wherein R represents a methyl or ethyl group, and an o-substituted benzylidene-p-substituted benzylidene sorbitol represented by the formula ##STR4## wherein R is as defined above, the total amount of the compounds of the formulae (I) and (II) being about 0.08 to about 1 part by weight per 100 parts by weight of the crystalline polyolefin resin, and the proportions of the compounds of the formulae (I) and (II) being about 0.5 to about 8 parts by weight of the compound of the formula (II) per 100 parts by weight of the compound of the formula (I).
Claim 2
Dependent Claim
114 words
A crystalline polyolefin resin composition comprising a crystalline polyolefin resin, a di(p-substituted benzylidene)sorbitol represented by the formula ##STR3## wherein R represents a methyl or ethyl group, and an o-substituted benzylidene-p-substituted benzylidene sorbitol represented by the formula ##STR4## wherein R is as defined above, the total amount of the compounds of the formulae (I) and (II) being about 0.08 to about 1 part by weight per 100 parts by weight of the crystalline polyolefin resin, and the proportions of the compounds of the formulae (I) and (II) being about 0.5 to about 8 parts by weight of the compound of the formula (II) per 100 parts by weight of the compound of the formula (I).
Claim 3
Dependent Claim
42 words
A composition as defined in claim 1 in which the crystalline polyolefin resin is low density polyethylene, medium density polyethylene or high density polyethylene, ethylene copolymer containing at least 50% of ethylene, propylene homopolymer or propylene containing at least 50% of propylene.
Claim 4
Dependent Claim
49 words
A composition as defined in claim 1 which contains the di(p-substituted benzylidene)sorbitol of the formula (I) and the o-substituted benzylidene-p-substituted benzylidene sorbitol of the formula (II) in a total amount of about 0.1 to about 0.5 part by weight per 100 parts by weight of the crystalline polyolefin resin.
Claim 5
Dependent Claim
45 words
A composition as defined in claim 1 in which the o-substituted benzylidene-p-substituted benzylidene sorbitol of the formula (II) is used in an amount of about 1 to about 5 parts by weight per 100 parts by weight of the di(p-substituted benzylidene)sorbitol of the formula (I).
Claim 6
Dependent Claim
33 words
A composition as defined in claim 1 which further contains about 0.01 to about 0.5 part by weight of carboxylic acid metal salt per 100 parts by weight of the crystalline polyolefin resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |