US3846362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding compositions based on ethylene-vinyl acetate copolymers and pitch
Assignee: Wacker Chemie AG
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Filing: 1972-09-07
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Granted: 1974-11-05
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Expires: 1992-09-07
Abstract
Abstract Molding compositions based on ethylene-vinyl acetate copolymers and pitch comprising a content of A. from 20 percent to 70 percent by weight of a coal tar pitch having a softening point of from 80* to 200*C (DIN 1995) B. from 10 to 75 percent by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of from 30 to 80 percent by weight of the copolymer, and C. from 5 to 50 percent by weight of a thermoplastically shapable polymer having a freezing temperature of below -30*C.
Inventors
- 👤 H Reinecke
- 👤 K Adler
- 👤 J Bauer
- 👤 E Pichler
- 👤 R Kretschmer
- 👤 G Lamhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:47
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L31/00; C08L31/02; C08L31/04; C08L95/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
A MOLDING COMPOSITION FOR THE PREPARATION OF FOILS BASED ON ETHYLENE-VINYL ACETATE COMPOLYMERS AND PITCH CONSISTING ESSENTALLY OF (A) FROM 40 TO 60 PERCENT BY WEIGHT OF A COAL TAR PITCH HAVING A SOFTENING POINT (DIN 1995) OF FROM 100*C TO 195*C, (B) FROM 30 TO 60 PERCENT BY WEIGHT OF AN ETHYLENEVINYL ACETATE COPOLYMER HAVING A VINYL ACETATE CONTENT OF FROM 50 TO 70 PERCENT BY WEIGHT OF THE COPOLYMER, (C) FROM 10 TO 30 PERCENT BY WEIGHT OF AN THERMOPLASTICALLY SHAPABLE POLYMER HAVING A FREEZING TEMPERATURE OF BELOW -30*C, (D) FROM 0 TO 10 PERCENT BY WEIGHT OF ADDITIVES SELECTED FROM THE GROUP CONSISTING OF PIGMENTS, FILLERS, STABILIZERS AND PROCESSING AIDS.
Claim 2
Dependent Claim
113 words
A MOLDING COMPOSITION FOR THE PREPARATION OF FOILS BASED ON ETHYLENE-VINYL ACETATE COMPOLYMERS AND PITCH CONSISTING ESSENTALLY OF (A) FROM 40 TO 60 PERCENT BY WEIGHT OF A COAL TAR PITCH HAVING A SOFTENING POINT (DIN 1995) OF FROM 100*C TO 195*C, (B) FROM 30 TO 60 PERCENT BY WEIGHT OF AN ETHYLENEVINYL ACETATE COPOLYMER HAVING A VINYL ACETATE CONTENT OF FROM 50 TO 70 PERCENT BY WEIGHT OF THE COPOLYMER, (C) FROM 10 TO 30 PERCENT BY WEIGHT OF AN THERMOPLASTICALLY SHAPABLE POLYMER HAVING A FREEZING TEMPERATURE OF BELOW -30*C, (D) FROM 0 TO 10 PERCENT BY WEIGHT OF ADDITIVES SELECTED FROM THE GROUP CONSISTING OF PIGMENTS, FILLERS, STABILIZERS AND PROCESSING AIDS.
Claim 3
Dependent Claim
12 words
The molding composition of claim 1 wherein component C is a thermoplast.
Claim 4
Dependent Claim
11 words
The molding composition of claim 2 wherein said thermoplast is polyethylene.
Claim 5
Dependent Claim
12 words
The molding composition of claim 1 wherein component C is an elastomer.
Claim 6
Dependent Claim
14 words
The molding composition of claim 4 wherein said elastomer is a synthetic thermoplastic rubber.
Claim 7
Dependent Claim
25 words
The molding composition of claim 5 wherein said synthetic thermoplastic rubber is selected from the group consisting of styrene-butadiene thermoplastic rubbers and polyurethane thermoplastic rubbers.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |