Patent US4206103A successfully refreshed from Google Patents.
US4206103A
Expired / Lapsed
US
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Vinyl chloride polymers having improved stability
Assignee: Borg Warner Corp
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Filing: 1978-05-25
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Granted: 1980-06-03
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Expires: 1998-05-25
Abstract
Abstract A vinyl chloride polymer composition containing small proportions of a dialkyl pentaerythritol diphosphite and a solid, aliphatic polyhydroxy compound. The composition is characterized by good thermal stability and resistance to coloration on exposure to ultraviolet light.
Inventors
- 👤 Zigmunt K. Kromolicki
- 👤 Ved K. Sahajpal
- 👤 Cornelis Van Gelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:08
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053; C08K5/49; C08K5/51; C08K5/52; C08K5/527; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L91/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
54 words
A composition of matter effective in minor proportions to impart color stability to vinyl chloride polymers comprising in combination a dialkyl pentaerythritol disphosphite wherein the alkyl groups each contain 8-20 carbon atoms and a solid aliphatic polyhydroxy compound, the ratio of dialkyl pentaerythritol disphosite to polyhydroxy compound being from about 2:1 to about 1:2.
Claim 2
Dependent Claim
54 words
A composition of matter effective in minor proportions to impart color stability to vinyl chloride polymers comprising in combination a dialkyl pentaerythritol disphosphite wherein the alkyl groups each contain 8-20 carbon atoms and a solid aliphatic polyhydroxy compound, the ratio of dialkyl pentaerythritol disphosite to polyhydroxy compound being from about 2:1 to about 1:2.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein the dialkyl pentaerythritol diphosphite is distearyl pentaerythritol diphosphite.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein the distearyl pentaerythritol diphosphite is encapsulated in a wax.
Claim 5
Dependent Claim
13 words
The composition of claim 3 wherein the wax is a montanic acid ester.
Claim 6
Dependent Claim
15 words
The composition of claim 1 wherein the solid aliphatic polyhydroxy compound contains six hydroxy groups.
Claim 7
Dependent Claim
13 words
The composition of claim 1 wherein the solid aliphatic polyhydroxy compound is sorbitol.
Claim 8
Dependent Claim
40 words
A relatively heat-stable polymer composition comprising a vinyl chloride polymer and minor proportions, sufficient to provide such stability, of each of a dialkyl pentaerythritol diphosphite wherein the alkyl groups each contain 8-20 carbon atoms and a solid aliphatic polyhydroxy compound.
Claim 9
Dependent Claim
40 words
A relatively heat-stable polymer composition comprising a vinyl chloride polymer and minor proportions, sufficient to provide such stability, of each of a dialkyl pentaerythritol diphosphite wherein the alkyl groups each contain 8-20 carbon atoms and a solid aliphatic polyhydroxy compound.
Claim 10
Dependent Claim
23 words
The polymer composition of claim 7 wherein the vinyl chloride polymer is a copolymer comprising at least about 80% of vinyl chloride units.
Claim 11
Dependent Claim
14 words
The polymer composition of claim 8 wherein the vinyl chloride polymer is polyvinyl chloride.
Claim 12
Dependent Claim
15 words
The polymer composition of claim 7 wherein the dialkyl pentaerythritol diphosphite is distearyl pentaerythritol diphosphite.
Claim 13
Dependent Claim
16 words
The polymer composition of claim 7 wherein the dialkyl pentaerythritol diphosphite is substantially pure spiro isomer.
Claim 14
Dependent Claim
16 words
The polymer composition of claim 7 wherein the dialkyl pentaerythritol diphosphite is encapsulated in a wax.
Claim 15
Dependent Claim
14 words
The polymer composition of claim 7 wherein the wax is a montanic acid ester.
Claim 16
Dependent Claim
16 words
The polymer composition of claim 7 wherein the solid aliphatic polyhydroxy compound contains six hydroxy groups.
Claim 17
Dependent Claim
36 words
The composition of claim 14 wherein the solid aliphatic polyhydroxy compound is a mixture of such compounds containing four parts of mannitol and one part each of sorbitol and sucrose distearate (containing 30% of sucrose dipalmitate).
Claim 18
Dependent Claim
14 words
The polymer composition of claim 7 wherein the solid aliphatic polyhydroxy compound is sorbitol.
Claim 19
Dependent Claim
37 words
The polymer composition of claim 7 wherein the solid aliphatic polyhydroxy compound is a mixture of such compounds containing four parts of mannitol and one part each of sorbitol and sucrose distearate (containing 30% of sucrose dipalmitate.
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) | 1983-06-03 | 1983-12-03 | 1984-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-03 | 1987-12-03 | 1988-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-03 | 1991-12-03 | 1992-06-03 | $7700.00 | Window Closed / Lapsed |