US4021508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl chloride -EPDM resin compositions
Assignee: Ryo-Nichi Co Ltd
•
Filing: 1975-07-07
•
Granted: 1977-05-03
•
Expires: 1995-07-07
Abstract
Abstract This invention relates to a vinyl chloride resin composition excellent in weather resistance and impact resistance. More particularly, the invention pertains to a weather resistant and impact resistant vinyl chloride resin composition low in cost and markedly improved in processability which comprises a vinyl chloride resin and a vinyl chloride graft copolymer prepared according to a specific process by graft-copolymerizing a vinyl chloride monomer on an ethylene-propylene-diene copolymer.
Inventors
- 👤 Kakusaburo Nakanishi
- 👤 Tatsuro Yoshida
- 👤 Kyoku Nakatubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:50
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F255/06; C08K; C08K5/00; C08K5/0008; C08K5/005; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L51/00; C08L51/003; C08L51/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
An easily processable, and weather and impact-resistant vinyl chloride resin composition comprising a vinyl chloride resin and a vinyl chloride graft copolymer, said graft copolymer containing 10 - 60% by weight of an ethylene-propylene-diene terpolmer and resulting from suspension polymerization of a vinyl chloride monomer with said ethylene-propylene-diene terpolymer in an aqueous phase in the presence of an aliphatic alcohol having not less than 8 carbon atoms, there being 1 to 40% by weight of said terpolymer based on said composition.
Claim 2
Dependent Claim
81 words
An easily processable, and weather and impact-resistant vinyl chloride resin composition comprising a vinyl chloride resin and a vinyl chloride graft copolymer, said graft copolymer containing 10 - 60% by weight of an ethylene-propylene-diene terpolmer and resulting from suspension polymerization of a vinyl chloride monomer with said ethylene-propylene-diene terpolymer in an aqueous phase in the presence of an aliphatic alcohol having not less than 8 carbon atoms, there being 1 to 40% by weight of said terpolymer based on said composition.
Claim 3
Dependent Claim
29 words
The composition as claimed in claim 1 wherein said terpolymer is present in an amount of 2 - 30% by weight, based on the total weight of said composition.
Claim 4
Dependent Claim
14 words
The composition as claimed in claim 1, further including tin-type and/or Ca-Zn type stabilizers.
Claim 5
Dependent Claim
41 words
The composition as claimed in claim 1, wherein said terpolymer has a Mooney viscosity of 20 - 120, a propylene content of 20 - 50% by weight and a diene content of not more than 30 in terms of iodine value.
Claim 6
Dependent Claim
24 words
The composition as claimed in claim 1, wherein said alcohol is at least one member selected from lauryl alcohol, stearyl alcohol and palmityl alcohol.
Claim 7
Dependent Claim
15 words
A non-toxic, weather resistant and impact resistant pipe manufactured from the composition of claim 1.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |