US3666700A
Expired / Lapsed
US
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Polyvinyl chloride composition
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-12-03
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Granted: 1972-05-30
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Expires: 1990-12-03
Abstract
Abstract A polyvinyl chloride composition is prepared from a polyvinyl chloride resin having a weight average molecular weight of about 40,000 to about 90,000 in combination with an organophosphite chelator, a thio-organotin stabilizer, and a lubricant system consisting of a white oil and a microcrystalline petroleum wax. This composition gives a product which is characterized by easy processability, high clarity, and greatly reduced yellowing tendency; thus, minimizing or eliminating the need for a color masking agent (e.g., a blue or violet toner).
Inventors
- 👤 Laurence F King
- 👤 William Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:29
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/526; C08K5/01; C08K5/56; C08K5/57; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L91/00; C08L91/06; C08L91/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
The composition of claim 1 wherein, per 100 parts of resin, there are present about 1.5 to about 4 parts of stabilizer, about 1 to about 3 parts of chelator, about 0.1 to about 2 parts of white oil, and about 0.1 to about 2 parts of wax.
Claim 2
Dependent Claim
35 words
The composition of claim 2 wherein there are present 2 to 3 parts of stabilizer, 1 to 3 parts of chelator, 0.5 to 1 parts of white oil and 0.5 to 1 parts of wax.
Claim 3
Dependent Claim
33 words
The composition of claim 1 wherein the organophosphite chelator is selected from the group consisting of phenyl diisodecyl phosphite, diphenyl octyl phosphite, a phosphite having the formula: and a phosphite having the formula:
Claim 4
Dependent Claim
20 words
The composition of claim 1 wherein the weight average molecular weight of the resin is about 55,000 to about 80,000.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein the stabilizer is a thio-organotin stabilizer.
Claim 6
Dependent Claim
43 words
The composition of claim 1 wherein the white oil has a minimum color on the Saybolt scale of +30, a flash point (Cleveland Open Cup) of at least 300* F., and a viscosity at 100* F. of about 45 to about 500 S.U.S.
Claim 7
Dependent Claim
21 words
The composition of claim 7 wherein the viscosity at 100* F. is in the range of 50 to about 100 S.U.S.
Claim 8
Dependent Claim
67 words
The composition of claim 1 wherein the microcrystalline wax contains a minimum of 99 percent straight chain paraffins, has a molecular weight in the range of about 400 to about 500, a color on the Saybolt scale of +30 minimum, a melting point in the range of 140* to 165* F., a maximum oil content of 0.5 percent and a viscosity at 210* F. of 35-50 S.U.S.
Claim 9
Dependent Claim
27 words
The composition of claim 1 wherein about 1 to about 5 parts of a processing aid selected from the group consisting of polyacrylates and polymethacrylates is added.
Claim 10
Dependent Claim
18 words
The composition of claim 1 wherein 10-20 parts of a methacrylate-butadiene-styrene terpolymer is added as an impact modifier.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |