Patent EP0736552A2 successfully refreshed from Google Patents.
EP0736552A2
Expired / Lapsed
EP
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Propylene homopolymer
Assignee: BP Corp North America Inc
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Filing: 1992-02-03
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Granted: —
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Expires: 2012-02-03
Abstract
Abstract A polypropylene homopolymer is characterised by a broadened molecular weight distribution, i.e. M w /M n is 7-50, and by a compression-moulded flexural modulus of at least 285 kpsi (1965 MPa); an injection-moulded flexural modulus of at least 245 kpsi (1482 MPa); a tacticity of at least 96.5%; a melt flow rate of at least 0.1 up to 200 grams per 10 minutes; a melting point in the range of 160°C to 168°C; a heat of fusion of at least 24 calories per gram; and less than 2% by weight of hexane extractables as measured by a 3 hour extraction.
Inventors
- 👤 Stephen Alan Cohen
- 👤 Jerome Anthony Streeky
- 👤 Nicholas Marios Karayannis
- 👤 Benjamin Samuel Tovrog
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 10:55
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/04; C08F110/06; C08F297/00; C08F297/06; C08F297/08; C08F297/083; C08F10/00; C08F10/04; C08F10/06; C08F210/00; C08F210/04; C08F210/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A polypropylene homopolymer characterised by:- a compression-moulded flexural modulus of at least 285 kpsi (1965 MPa); an injection-moulded flexural modulus of at least 245 kpsi (1482 MPa); a ratio of M w /M n of from 7 to 50; a tacticity of at least 96.5%; a melt flow rate of at least 0.1 up to 200 grams per 10 minutes; a melting point in the range of 160°C to 168°C; a heat of fusion of at least 24 calories per gram; and less than 2% by weight of hexane extractables as measured by a 3 hour extraction.
Claim 2
Dependent Claim
18 words
A homopolymer according to Claim 1 having a compression-moulded flexural moduli of at least 295 kpsi (2034 MPa).
Claim 3
Dependent Claim
20 words
A homopolymer according to Claim 1 or 2 having an injection-moulded flexural moduli of at least 255 kpsi (1758 MPa).
Claim 4
Dependent Claim
20 words
A homopolymer according to any previous claim having a ratio of M w /M n of between 7.5 and 50.
Claim 5
Dependent Claim
19 words
A homopolymer according to Claim 4 having a ratio of M w /M n of between 7.5 and 11.8.
Claim 6
Dependent Claim
14 words
A homopolymer according to any previous claim having a tacticity of at least 97.5%.
Claim 7
Dependent Claim
22 words
A homopolymer according to any previous claim containing less than 1.4 wt% of hexane extractables as measured by a three hour extraction.
Claim 8
Dependent Claim
30 words
A homopolymer according to any previous claim containing an additive selected from a heat stabiliser, an anti-oxidant, a UV absorber an anti-logging agent, a colouring agent and a nucleating agent.
References Cited (Backward Citations)
No citation records indexed.
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