Patent US2710084A successfully refreshed from Google Patents.
Patent US4153587A successfully refreshed from Google Patents.
US4153587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High inorganic filler content composition
Assignee: Mitsubishi Chemical Corp
•
Filing: 1977-05-06
•
Granted: 1979-05-08
•
Expires: 1997-05-06
Abstract
Abstract A modified propylene polymer containing mixed polymer composition characterized by high tensile strength, high elongation and good bending stiffness which consists essentially of:
Inventors
- 👤 Hiroshi Yui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:53
CPC Classifications
C; C08; C08L; C08L53/00; C08K; C08K3/00; C08K3/01; C08K3/013; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
In a modified propylene polymer containing a mixed polymer composition characterized by high tensile strength, high elongation and good bending stiffness, which consists essentially of: a. 95-60 wt. % of a crystalline propylene homopolymer, b. 1-20 wt. % of a crystalline block copolymer having the structure polypropylene-(ethylene-propylene) random copolymer, and c. 3-35 wt. % of a crystalline random ethylene-propylene copolymer, wherein the ethylene content of said modified propylene polymer is 12 wt. % to 15 wt. %, the improvement which comprises: admixing with said modified propylene polymer at least 30 wt. % of an inorganic filler having an average particle size of less than 20 microns in diameter.
Claim 2
Dependent Claim
108 words
In a modified propylene polymer containing a mixed polymer composition characterized by high tensile strength, high elongation and good bending stiffness, which consists essentially of: a. 95-60 wt. % of a crystalline propylene homopolymer, b. 1-20 wt. % of a crystalline block copolymer having the structure polypropylene-(ethylene-propylene) random copolymer, and c. 3-35 wt. % of a crystalline random ethylene-propylene copolymer, wherein the ethylene content of said modified propylene polymer is 12 wt. % to 15 wt. %, the improvement which comprises: admixing with said modified propylene polymer at least 30 wt. % of an inorganic filler having an average particle size of less than 20 microns in diameter.
Claim 3
Dependent Claim
27 words
The high inorganic filler content composition of claim 1, wherein the content of the random ethylene-propylene copolymer units is 20-5 wt % of said crystalline block copolymer.
Claim 4
Dependent Claim
17 words
The high inorganic filler content composition of claim 1, wherein the inorganic filler has a liphophilic surface.
Claim 5
Dependent Claim
28 words
The high inorganic filler content composition of claim 1, wherein the inorganic filler contains a polymer which has been reacted with a newly formed surface of said filler.
Claim 6
Dependent Claim
20 words
The high inorganic filler content composition of claim 4, wherein a vinyl polymer has been reacted with the inorganic filler.
Claim 7
Dependent Claim
51 words
The high inorganic filler content composiition of claim 1, wherein less than 70 wt % of the modified propylene polymer mixture is melted and uniformly admixed with more than 30 wt % of an inorganic filler having a particle size diameter less than 20μ and which is characterized by oleophilic surfaces.
Claim 8
Dependent Claim
51 words
The high inorganic filler content composition of claim 1, wherein less than 70 wt % of the modified propylene polymer mixture is melted and uniformly admixed with more than 50 wt % of an inorganic filler having a particle size diameter less than 20μ and which is characterized by oleophilic surfaces.
Claim 9
Dependent Claim
17 words
The modified propylene polymer of claim 1, wherein the ethylene content of said product is 12% wt.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |