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US4338228A
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Polyolefin composition containing (a) filler (b) nucleating agent and (c) heat deterioration inhibitor
Assignee: Tonen General Sekiyu KK
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Filing: 1980-10-07
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Granted: 1982-07-06
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Expires: 2000-10-07
Abstract
Abstract A polyolefin composition comprising a modified polyolefin obtained by adding an unsaturated carboxylic acid or an anhydride thereof to a polyolefin or mixtures of said modified polyolefin and an unmodified polyolefin, an inorganic filler, one or more nucleating agents or a combination thereof with one or more heat deterioration inhibitors, said polyolefin composition evidencing reduced deterioration by heat or reduction of its mechanical strength during a molding operation.
Inventors
- 👤 Hiroshi Inoue
- 👤 Masaaki Isoi
- 👤 Makoto Yoda
- 👤 Masato Komatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08K13/00; C08K13/02; C08K3/00; C08K3/01; C08K3/013; C08L; C08L51/00; C08L51/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
A polyolefin composition comprising: (a) a modified polyolefin obtained by adding an unsaturated carboxylic acid or anhydride thereof to a polyolefin, or a mixture of said modified polyolefin and an unmodified polyolefin; (b) an inorganic filler; (c) at least one nucleating agent which is a metal salt of aliphatic carboxylic acid, aliphatic dicarboxylic acids, aromatic carboxylic acids, aromatic dicarboxylic acids or alkyl-substituted derivatives thereof, or dibenzylidenesorbitol; and (d) and at least one heat deterioration inhibitor.
Claim 2
Dependent Claim
75 words
A polyolefin composition comprising: (a) a modified polyolefin obtained by adding an unsaturated carboxylic acid or anhydride thereof to a polyolefin, or a mixture of said modified polyolefin and an unmodified polyolefin; (b) an inorganic filler; (c) at least one nucleating agent which is a metal salt of aliphatic carboxylic acid, aliphatic dicarboxylic acids, aromatic carboxylic acids, aromatic dicarboxylic acids or alkyl-substituted derivatives thereof, or dibenzylidenesorbitol; and (d) and at least one heat deterioration inhibitor.
Claim 3
Dependent Claim
11 words
The polyolefin composition of claim 1 wherein said polyolefin is polypropylene.
Claim 4
Dependent Claim
16 words
The polyolefin composition of claim 1 wherein said polyolefin is a copolymer of propylene and ethylene.
Claim 5
Dependent Claim
38 words
The polyolefin composition of claim 1 wherein the inorganic filler is selected from the group consisting of glass fibers, carbon fibers, talc, asbestos, glass powder, silica, alumina, clay, calcium carbonate, gypsum, anhydrous calcium sulfate, mica and iron oxide.
Claim 6
Dependent Claim
17 words
The composition of claim 4 wherein the inorganic filler is selected from glass, carbon fibers and talc.
Claim 7
Dependent Claim
25 words
The polyolefin composition of claim 1 wherein the heat deterioration inhibitor is selected from the group consisting of phenolic antioxidants, phosphorous antioxidants and sulphur antioxidants.
Claim 8
Dependent Claim
27 words
The polyolefin composition of claim 6 wherein the phenolic antioxidants are selected from the group consisting of 2,6-di-tert-butyl-p-cresol, 2,2'-methylene-bis(4-methyl-6-tert-butylphenol, tetrakis-[methylene-3-(3',5'-di-tert-butyl-4'-hydroxyphenyl) propionate] methane and tris-(3,5-di-tert-butyl-4-hydroxybenzoyl)isocyanate; or mixtures thereof.
Claim 9
Dependent Claim
14 words
The polyolefin composition of claim 6 wherein the deterioration inhibitor is cyclic neopentatetrylbis(octadecyl phosphite).
Claim 10
Dependent Claim
16 words
The polyolefin composition of claim 6 wherein the deterioration inhibitor is dilauryl thiodipropionate and distearyl thiodipropionate.
References Cited (Backward Citations)
US3211808A
Cited
US3367926A
Cited
US3483276A
Cited
US3437550A
Cited
GB1161162A
Cited
US3929702A
Cited
GB1338046A
Cited
US4000111A
Cited
FR2152975B1
Cited
US3868433A
Cited
US3966845A
Cited
US3886227A
Cited
US3997503A
Cited
GB1442527A
Cited
US4198327A
Cited
US4198327B1
Cited
DE2708757A1
Cited
US4078017A
Cited
NL7900503A
Cited
JPS55131031A
Cited
US4255303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |