US5225108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer stabilizer and polymer composition stabililzed therewith
Assignee: Lanxess Solutions US Inc
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Filing: 1991-06-27
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Granted: 1993-07-06
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Expires: 2011-06-27
Abstract
Abstract Stabilizer compositions including blends of sodium perchlorate hydrate and calcium silicate are disclosed. Free flowing powder compositions of reduced hazard level including calcium silicate, non-absorbing diluent powder such as calcium carbonate, and a solution of sodium perchlorate in water are also disclosed. Vinyl halide compositions especially those used for motor vehicle components having improved long term stability at moderate aging temperatures of about 180 DEG F. to about 275 DEG F., and processes for preparing such compositions, are also disclosed.
Inventors
- 👤 Kook-Jin Bae
- 👤 Curtis R. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/16; C01; C01B; C01B11/00; C01B11/16; C01B11/18; C08K3/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
32 words
A stabilizer composition to provide long term stability to vinyl halide compositions at moderate aging temperatures of about 180° F. to 275° F., said stabilizer composition comprising sodium perchlorate and calcium silicate.
Claim 2
Dependent Claim
32 words
A stabilizer composition to provide long term stability to vinyl halide compositions at moderate aging temperatures of about 180° F. to 275° F., said stabilizer composition comprising sodium perchlorate and calcium silicate.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein the ratio of sodium perchlorate to calcium silicate is approximately 1:8 to approximately 3:4 by weight.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein the ratio of sodium perchlorate to calcium silicate is approximately 1:5 to approximately 4:10 by weight.
Claim 5
Dependent Claim
36 words
The composition of claim 1 comprising a water solution containing approximately 60 to 75 weight percent of sodium perchlorate, wherein the ratio of said solution to said calcium silicate is approximately 1:5 to 1:1 by weight.
Claim 6
Dependent Claim
22 words
The composition of claim 4 wherein the ratio of said solution to said calcium silicate is approximately 1:3 to 5:7 by weight.
Claim 7
Dependent Claim
20 words
The composition of claim 4 wherein the ratio of said solution to said calcium silicate is about 5:8 by weight.
Claim 8
Dependent Claim
20 words
The composition of claim 4 wherein the ratio of said solution to said calcium silicate is approximately 3:8 by weight.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |