US5082889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced polypropylene composition
Assignee: Toyoda Gosei Co Ltd
•
Filing: 1990-03-22
•
Granted: 1992-01-21
•
Expires: 2010-03-22
Abstract
Abstract A reinforced polypropylene composition comprising from 50 to 80% by weight a resin component comprising from 35 to 90 parts by weight a crystalline polypropylene (A) from 5 to 60 parts by weight a polyethylene resin (B), and from 5 to 30 parts by weight an aromatic hydrocarbon resin (C), the sum of (A), (B), and (C) being 100 parts by weight; from 15 to 45% by weight talc (D); and from 1 to 40% by weight glass fiber (E); the sum of the talc and the glass fiber being not more than 50% by weight, wherein the percentages are based on the sum of (A)+(B)+(C)+(D)+(E).
Inventors
- 👤 Junji Koizumi
- 👤 Yoshito Yazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:31
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08K3/00; C08K3/34; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/10; C08L23/12; C08L2205/00; C08L2205/02; C08L2205/03; C08L2205/035; C08L23/08; C08L23/0807; C08L23/0815; C08L57/00; C08L57/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
A reinforced polypropylene composition comprising: from 50 to 80% by weight a resin component comprising from 35 to 90 parts by weight a crystalline polypropylene (A) of 5 to 50, from 5 to 60 parts by weight a polyethylene resin (B), and from 5 to 30 parts by weight an aromatic hydrocarbon resin (C), which is represented by the following chemical structure wherein R and R1 designate H or CH 3 , and n designates the degree of polymerization: ##STR2## said aromatic hydrocarbon resin having a softening temperature ranging from 80° to 170° C. measured by the ball and ring method, the sum of (A), (B), and (C) being 100 parts by weight; from 15 to 45% by weight talc (D); and from 1 to 40% by weight glass fiber (E); with the sum of said talc and said glass fiber being not more than 50% by weight of the total sum of (A)+(B)+(C)+(D)+(E).
Claim 2
Dependent Claim
154 words
A reinforced polypropylene composition comprising: from 50 to 80% by weight a resin component comprising from 35 to 90 parts by weight a crystalline polypropylene (A) of 5 to 50, from 5 to 60 parts by weight a polyethylene resin (B), and from 5 to 30 parts by weight an aromatic hydrocarbon resin (C), which is represented by the following chemical structure wherein R and R1 designate H or CH 3 , and n designates the degree of polymerization: ##STR2## said aromatic hydrocarbon resin having a softening temperature ranging from 80° to 170° C. measured by the ball and ring method, the sum of (A), (B), and (C) being 100 parts by weight; from 15 to 45% by weight talc (D); and from 1 to 40% by weight glass fiber (E); with the sum of said talc and said glass fiber being not more than 50% by weight of the total sum of (A)+(B)+(C)+(D)+(E).
Claim 3
Dependent Claim
28 words
A reinforced polypropylene composition according to claim 1, wherein said crystalline polypropylene is a polypropylene, a modified polypropylene, or a blend of said polypropylene and said modified polypropylene.
Claim 4
Dependent Claim
32 words
A reinforced polypropylene composition according to claim 2, wherein said polypropylene is at least one selected from the group consisting of a homopolypropylene, a propylene-ethylene random copolymer, and a propylene-ethylene block copolymer.
Claim 5
Dependent Claim
35 words
A reinforced polypropylene composition according to claim 2, wherein said modified polypropylene is produced by homopolymerization of said polypropylene with an unsaturated carboxylic acid or the derivative thereof in the presence of an organic peroxide.
Claim 6
Dependent Claim
36 words
A reinforced polypropylene composition according to claim 2, wherein said crystalline polypropylene is a blend comprising from 80 to 99% by weight of said polypropylene and from 1 to 20% by weight of said modified polypropylene.
Claim 7
Dependent Claim
30 words
A reinforced polypropylene composition according to claim 1, wherein at least one of high density polyethylene, low density polyethylene, and linear low density polyethylene is used as said polyethylene resin.
Claim 8
Dependent Claim
24 words
A reinforced polypropylene composition according to claim 1, wherein said glass fiber is in the form of a glass roving or a chopped strand.
Claim 9
Dependent Claim
30 words
A reinforced polypropylene composition according to claim 1, wherein said glass fiber is from 3 to 6 mm long, and the surface thereof is treated by a silane coupling agent.
Claim 10
Dependent Claim
133 words
A reinforced polypropylene composition comprising: from 50 to 80% by weight a resin component comprising from 35 to 90 parts by weight a crystalline polypropylene (A) of 5 to 50, from 5 to 60 parts by weight a polyethylene resin (B) which is at least one of high density polyethylene, low density polyethylene and a linear low density polyethylene, and from 5 to 30 parts by weight an aromatic hydrocarbon resin (C), the sum of (A), (B), and (C) being 100 parts by weight; from 15 to 45% by weight talc (D); and from 1 to 40% by weight glass fiber (E); with the sum of said talc and said glass fiber being not more than 50% by weight of the total composition and the percentages being based on the sum of (A)+(B)+(C)+(D)+(E).
Claim 11
Dependent Claim
133 words
A reinforced polypropylene composition comprising: from 50 to 80% by weight a resin component comprising from 35 to 90 parts by weight a crystalline polypropylene (A) of 5 to 50, from 5 to 60 parts by weight a polyethylene resin (B) which is at least one of high density polyethylene, low density polyethylene and a linear low density polyethylene, and from 5 to 30 parts by weight an aromatic hydrocarbon resin (C), the sum of (A), (B), and (C) being 100 parts by weight; from 15 to 45% by weight talc (D); and from 1 to 40% by weight glass fiber (E); with the sum of said talc and said glass fiber being not more than 50% by weight of the total composition and the percentages being based on the sum of (A)+(B)+(C)+(D)+(E).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |