Patent EP0178283A2 successfully refreshed from Google Patents.
EP0178283A2
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EP
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Rigid material of expanded polypropylene and process for preparing the same
Assignee: Montefina SA
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Filing: 1985-10-07
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Granted: —
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Expires: 2005-10-07
Abstract
Abstract It is disclosed rigid materials such as sheets, boards or tubes made of expanded polypropylene, which have a uniform specific gravity d comprised between about 4.1 x 10- 6 and about 8.1 x 10 -6 Newton/mm 3 , a crystallization temperature comprised between about 115°C and about 135°C and a flexural modulus Mf expressed in Newton/mm 3 such that the ratio Mf:d is comprised between about 1.5 x 10 8 and 1.7 x 10 8 mm.
Inventors
- 👤 Jean-Noel Bertrand
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 08:00
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/0014; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; Y; Y10; Y10S; Y10S521/00; Y10S521/908
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
71 words
1) Rigid materials made of expanded polypropylene characterized by (i) a uniform specific gravity d comprised between about 4.1 x 10 and about 8.1 x 10 -6 Newton/mm 3 , (ii) a crystallization temperature comprised between about 115°C and about 135°C, and (iii) a flexural modulus Mf expressed in Newton/mm 2 such that the ratio Mf:d is comprised between about 1.50 x 10 8 and 1.70 x 10 8 mm .
Claim 2
Dependent Claim
71 words
1) Rigid materials made of expanded polypropylene characterized by (i) a uniform specific gravity d comprised between about 4.1 x 10 and about 8.1 x 10 -6 Newton/mm 3 , (ii) a crystallization temperature comprised between about 115°C and about 135°C, and (iii) a flexural modulus Mf expressed in Newton/mm 2 such that the ratio Mf:d is comprised between about 1.50 x 10 8 and 1.70 x 10 8 mm .
Claim 3
Dependent Claim
19 words
2) Rigid materials according to claim 1, characterized by a crystallization temperature comprised between about 115°C and about 130°C.
Claim 4
Dependent Claim
28 words
3) Rigid materials according to claim 1, characterized in that the ratio Mf/d is comprised between about 1.52 x 10 8 and 1.68 x 10 8 mm .
References Cited (Backward Citations)
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