US4584349A
Expired / Lapsed
US
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Method and composition for improved melt processability of chlorinated polyvinyl chloride
Assignee: Noveon IP Holdings Corp
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Filing: 1985-01-28
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Granted: 1986-04-22
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Expires: 2005-01-28
Abstract
Abstract A composition of matter comprising a blend of CPVC having a chlorine content of between about 60% and 66% by weight and a polymethylmethacrylate content of between about 0% and 80% by weight of the blend. The composition of matter displays substantially single, homogeneous phase behavior with the CPVC and polymethylmethacrylate being substantially or completely miscible. Blending of CPVC and polymethylmethacrylate provides a resulting blended polymeric material having enhanced temperature and durability properties. Melt processability of CPVC polymeric material may be enhanced by the inclusion of polymethylmethacrylate to form the blends.
Inventors
- 👤 Marvin H. Lehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:28
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/22; C08L27/24; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; Y; Y10; Y10S; Y10S525/00; Y10S525/931
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A composition of matter comprising a polymer blend consisting of chlorinated polyvinyl chloride having a chlorine content not less than about 60% nor greater than about 66% by weight and poly methylmethacrylate, the polymethylmethacrylate comprising not more than 80% by weight of the blend, the blend being a substantially single phased composition possessed of a single glass transition temperature in excess of the glass transition temperature of either pure polymer blend component thereof.
Claim 2
Dependent Claim
73 words
A composition of matter comprising a polymer blend consisting of chlorinated polyvinyl chloride having a chlorine content not less than about 60% nor greater than about 66% by weight and poly methylmethacrylate, the polymethylmethacrylate comprising not more than 80% by weight of the blend, the blend being a substantially single phased composition possessed of a single glass transition temperature in excess of the glass transition temperature of either pure polymer blend component thereof.
Claim 3
Dependent Claim
26 words
The composition of claim 1, the chlorine content of the chlorinated polyvinyl chloride being not less than about 60.5% nor greater than about 65% by weight.
Claim 4
Dependent Claim
24 words
The composition of claim 1, the glass transition temperature of the blend being greater than a temperature predicted by application of the Fox equation.
Claim 5
Independent Claim
91 words
A method for improving melt processability and physical characteristics of chlorinated polyvinyl chloride comprising the steps of providing chlorinated polyvinyl chloride having a chlorine content of at least about 60% and not more than about 66% by weight; providing polymethylmethacrylate; and blending the chlorinated polyvinyl chloride and the polymethylmethacrylate to form a composition having not more than about 80% by weight polymethylmethacrylate, the composition being a substantially single phased composition possessed of a single glass transition temperature in excess of the glass transition temperature of either pure polymer blend component thereof.
Claim 6
Independent Claim
91 words
A method for improving melt processability and physical characteristics of chlorinated polyvinyl chloride comprising the steps of providing chlorinated polyvinyl chloride having a chlorine content of at least about 60% and not more than about 66% by weight; providing polymethylmethacrylate; and blending the chlorinated polyvinyl chloride and the polymethylmethacrylate to form a composition having not more than about 80% by weight polymethylmethacrylate, the composition being a substantially single phased composition possessed of a single glass transition temperature in excess of the glass transition temperature of either pure polymer blend component thereof.
Claim 7
Dependent Claim
23 words
The method of claim 4, the chlorinated polyvinyl chloride having at least about 61% and not more than about 65% by weight chlorine.
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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |