US4611024A
Expired / Lapsed
US
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Propylene polymer composition containing a hydrotalcite and an acetal of an alditol
Assignee: Phillips Petroleum Co
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Filing: 1985-02-14
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Granted: 1986-09-09
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Expires: 2005-02-14
Abstract
Abstract A propylene polymer composition containing a clarifier and a small amount of a hydrotalcite to enhance the effect of the clarifier. The resulting composition is of particular value as an injection molding grade resin.
Inventors
- 👤 Al R. Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:37
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K5/00; C08K5/04; C08K5/15; C08K5/156; C08K5/1575
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
43 words
A composition comprising: (a) a predominantly propylene polymer; (b) a clarifying agent comprising an acetal of a 5-7 carbon atom alditol and a 2-8 carbon aldehyde; and (c) 0.01 to 0.5 weight percent based on the weight of said polymer of a hydrotalcite.
Claim 2
Dependent Claim
43 words
A composition comprising: (a) a predominantly propylene polymer; (b) a clarifying agent comprising an acetal of a 5-7 carbon atom alditol and a 2-8 carbon aldehyde; and (c) 0.01 to 0.5 weight percent based on the weight of said polymer of a hydrotalcite.
Claim 3
Dependent Claim
12 words
A composition according to claim 1 wherein said polymer is propylene homopolymer.
Claim 4
Dependent Claim
22 words
A composition according to claim 1 wherein said polymer is a copolymer of propylene with 0.1 to 20 weight percent ethylene incorporation.
Claim 5
Dependent Claim
22 words
A composition according to claim 3 wherein said polymer is a copolymer of propylene with 1 to 4 weight percent ethylene incorporation.
Claim 6
Dependent Claim
21 words
A composition according to claim 1 containing in addition a phenolic antioxidant, an organic phosphite, a lubricant, and an antistatic agent.
Claim 7
Dependent Claim
37 words
A composition according to claim 5 wherein said phenolic antioxidant is selected from tetrakis[methylene(3,5-di-t-butyl-4-hydroxyhydrocinnamate)]methane and BHT, said organic phosphite is bis(2,4-di-t-butylphenyl)pentaerythritol diphosphite, said lubricant is calcium stearate, and said antistatic agent is a low glycerine glycol monostearate.
Claim 8
Dependent Claim
24 words
A composition according to claim 5 wherein said hydrotalcite has the formula Mg 4 .5 5Al 2 (OH) 13 CO 3 .31/2H 2 O.
Claim 9
Dependent Claim
12 words
A composition according to claim 5 wherein said acetal is dibenzylidene sorbitol.
Claim 10
Dependent Claim
46 words
A composition according to claim 8 wherein said hydrotalcite has the formula Mg 4 .5 Al 2 (OH) 13 CO 3 .31/2H 2 O, and is present in an amount within the range of 0.05 to 0.15 weight percent based on the weight of said polymer.
Claim 11
Dependent Claim
24 words
A composition according to claim 1 wherein said hydrotalcite has the formula Mg 4 .5 Al 2 (OH) 13 CO 3 .31/2H 2 O.
Claim 12
Dependent Claim
15 words
A composition according to claim 1 wherein said alditol is a 6 carbon atom alditol.
Claim 13
Dependent Claim
13 words
A composition according to claim 1 wherein said aldehyde is an aromatic aldehyde.
Claim 14
Dependent Claim
11 words
A composition according to claim 12 wherein said aldehyde is benzaldehyde.
Claim 15
Dependent Claim
15 words
A composition according to claim 13 wherein said alditol is a 6 carbon atom alditol.
Claim 16
Dependent Claim
12 words
A composition according to claim 14 wherein said acetal is a diacetal.
Claim 17
Dependent Claim
12 words
A composition according to claim 1 wherein said acetal is a diacetal.
Claim 18
Dependent Claim
12 words
A composition according to claim 1 wherein said acetal is dibenzylidene sorbitol.
Claim 19
Dependent Claim
22 words
A composition according to claim 1 wherein said polymer has a melt flow within the range of 1 to 40 g/10 minutes.
Claim 20
Dependent Claim
21 words
A composition according to claim 1 wherein said hydrotalcite is present in an amount within the range of 0.02 to 0.15.
Claim 21
Dependent Claim
21 words
A composition according to claim 19 wherein said clarifier is present in an amount within the range of 0.1 to 0.5.
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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) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |