US4824906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of grafted polyethylene with chlorinated polyethylene
Assignee: EIDP Inc
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Filing: 1988-03-10
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Granted: 1989-04-25
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Expires: 2008-03-10
Abstract
Abstract A blend of 80-99 weight percent chlorinated polyethylene containing 15-60 weight percent chlorine with 20-1 weight percent of polyethylene containing up to 5 weight percent chlorine and 0.5-5 weight percent of a grafted unsaturated dicarboxylic acid or anhydride is disclosed. The preferred chlorinated polyethylene is made by chlorinating a blend of high and low density polyethylene.
Inventors
- 👤 Wolfgang Honsberg
- 👤 Royce E. Ennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:10
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/26; C08L23/28; C08L23/286
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
A blend of 80-99 weight percent of chlorinated polyethylene containing 15-60 percent by weight chlorine and from 1-20 weight percent of polyethylene containing 0-50 weight percent chlorine to which is grafted 0.1-5 weight percent unsaturated dicarboxylic acid or anhydride containing 4 to 6 carbon atoms.
Claim 2
Dependent Claim
45 words
A blend of 80-99 weight percent of chlorinated polyethylene containing 15-60 percent by weight chlorine and from 1-20 weight percent of polyethylene containing 0-50 weight percent chlorine to which is grafted 0.1-5 weight percent unsaturated dicarboxylic acid or anhydride containing 4 to 6 carbon atoms.
Claim 3
Dependent Claim
15 words
The blend of claim 1 wherein the chlorinated polyethylene contains 20-40 percent by weight chlorine.
Claim 4
Dependent Claim
15 words
The blend of claim 2 wherein the grafted polyethylene contains from 0-5 weight percent chlorine.
Claim 5
Dependent Claim
15 words
The blend of claim 2 wherein the grafted polyethylene contains from 20-35 weight percent chlorine.
Claim 6
Dependent Claim
92 words
The blend of claim 2 wherein the functional groups are derived from maleic anhydride, maleic acid or fumaric acid and have been reacted with amino groups of a compound containing 2 to 4 amino groups and 2 to 14 carbon atoms or a silane of the formula Si--An, --Bm, --C where -A is alkyl of 1 to 3 carbon atoms, --B is alkoxy of 1 to 3 carbon atoms, --C is --X--NH 2 or --X--NH--X--NH 2 where --X--is alkylene of 1 to 3 carbon atoms, m+n=3 and n is 0 or 1.
Claim 7
Dependent Claim
39 words
A blend of chlorinated polyethylene containing 15-60 percent by weight chlorine, 20-35 percent by weight polyethylene and 2-20 percent by weight polyethylene to which is grafted 0.2-5 percent by weight unsaturated dicarboxylic acid containing 4 to 6 carbon atoms.
Claim 8
Dependent Claim
39 words
A blend of chlorinated polyethylene containing 15-60 percent by weight chlorine, 20-35 percent by weight polyethylene and 2-20 percent by weight polyethylene to which is grafted 0.2-5 percent by weight unsaturated dicarboxylic acid containing 4 to 6 carbon atoms.
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) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |