US4197379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastoplastic compositions of rubber and polyamide
Assignee: Advanced Elastomer Systems LP
•
Filing: 1977-12-22
•
Granted: 1980-04-08
•
Expires: 1997-12-22
Abstract
Abstract Elastoplastic compositions are described comprising blends of cross-linked rubber and thermoplastic polyamide.
Inventors
- 👤 Aubert Y. Coran
- 👤 Raman P. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:26
CPC Classifications
C; C08; C08L; C08L77/00; C08L19/00; C08L19/003; C08L77/02; C08L77/06; C08L9/00; C08L9/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
78 words
An electroplastic composition comprising a blend of thermoplastic crystalline polyamide in an amount sufficient to impart thermoplasticity up to 50 weight percent of the composition and nitrile rubber, comprising a polymer of 1,3 butadiene or isoprene and vinyl nitrile monomer, in an amount sufficient to impart rubberlike elasticity up to 80 weight percent of the composition, modified by reaction with 0.2-10 parts by weight of dimethylol phenolic compound per 100 total parts by weight of polyamide and rubber.
Claim 2
Dependent Claim
78 words
An electroplastic composition comprising a blend of thermoplastic crystalline polyamide in an amount sufficient to impart thermoplasticity up to 50 weight percent of the composition and nitrile rubber, comprising a polymer of 1,3 butadiene or isoprene and vinyl nitrile monomer, in an amount sufficient to impart rubberlike elasticity up to 80 weight percent of the composition, modified by reaction with 0.2-10 parts by weight of dimethylol phenolic compound per 100 total parts by weight of polyamide and rubber.
Claim 3
Dependent Claim
19 words
The composition of claim 1 in which the dimethylol phenolic compound is dimethylol C 1 -C 10 alkyl phenol.
Claim 4
Dependent Claim
49 words
In a thermoplastic composition comprising a blend of thermoplastic crystalline polyamide and nitrile rubber, comprising a polymer of 1,3 butadiene or isoprene and vinyl nitrile monomer, the improvement comprises reacting the blend and 0.2-10 parts by weight dimethylol phenolic compound per 100 total parts by weight polyamide and rubber.
Claim 5
Dependent Claim
49 words
In a thermoplastic composition comprising a blend of thermoplastic crystalline polyamide and nitrile rubber, comprising a polymer of 1,3 butadiene or isoprene and vinyl nitrile monomer, the improvement comprises reacting the blend and 0.2-10 parts by weight dimethylol phenolic compound per 100 total parts by weight polyamide and rubber.
Claim 6
Dependent Claim
21 words
The composition of claim 3 in which 0.5-5 parts by weight of dimethylol C 1 -C 10 alkyl phenol is reacted.
Claim 7
Dependent Claim
82 words
A process of preparing elastoplastic compositions which comprises blending about 20-50 parts by weight of crystalline thermoplastic polyamide, about 50-80 parts by weight of nitrile rubber, comprising a polymer of of 1,3 butadiene or isoprene and vinyl nitrile monomer, and about 0.2-10 parts by weight dimethylol phenolic compound per 100 total parts by weight of polyamide and rubber at a temperature sufficient to melt said polyamide, masticating the blend continuously at 150°-270° C. until reaction of said phenolic compound is essentially complete.
Claim 8
Dependent Claim
82 words
A process of preparing elastoplastic compositions which comprises blending about 20-50 parts by weight of crystalline thermoplastic polyamide, about 50-80 parts by weight of nitrile rubber, comprising a polymer of of 1,3 butadiene or isoprene and vinyl nitrile monomer, and about 0.2-10 parts by weight dimethylol phenolic compound per 100 total parts by weight of polyamide and rubber at a temperature sufficient to melt said polyamide, masticating the blend continuously at 150°-270° C. until reaction of said phenolic compound is essentially complete.
Claim 9
Dependent Claim
20 words
The process of claim 5 which comprises blending 0.5-5 parts by weight of dimethylol C 1 -C 10 alkyl phenol.
Claim 10
Dependent Claim
13 words
The process of claim 5 in which the polyamide melts between 160°-230° C.
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) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |