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US5133899A
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Stabilizer composition for chlorine-containing polymers and process for preparation thereof
Assignee: Mizusawa Industrial Chemicals Ltd
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Filing: 1990-10-01
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Granted: 1992-07-28
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Expires: 2010-10-01
Abstract
Abstract Disclosed to a stabilizer composition for a chlorine-containing polymer, which comprises a zeolite type stabilizer; calcium hydroxide or magnesium hydroxide, a metal soap type stabilizer and perchloric acid as indispensable components. The stabilizer composition is obtained by adding a metal soap type stabilizer to a mixture of a zeolite type stabilizer and calcium hydroxide or magnesium hydroxide under attrition to cover the mixture with the metal soap type stabIlizer at a high efficiency, and adding perchloric acid to the covered mixture. In the stabilizer composition of the present invention, the initial discoloration, which is a fatal defect of the conventional zeolite type stabilizer for a chlorine-containing polymer, can be prevented, and a sufficient hydrogen chloride-capturing capacity is exerted and a high heat stability is attained without occurrence of bleeding.
Inventors
- 👤 Tadahisa Nakazawa
- 👤 Masahide Ogawa
- 👤 Shoji Shoji
- 👤 Seizi Wakaki
- 👤 Choichi Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:01
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/16; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/09; C08K5/098
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
27 words
A composition for stabilizing a chlorine-containing polymer, which comprises a zeolite stabilizer, calcium hydroxide or magnesium hydroxide, a metal soap stabilizer and perchloric acid as essential components.
Claim 2
Dependent Claim
27 words
A composition for stabilizing a chlorine-containing polymer, which comprises a zeolite stabilizer, calcium hydroxide or magnesium hydroxide, a metal soap stabilizer and perchloric acid as essential components.
Claim 3
Dependent Claim
52 words
A stabilizer composition as set forth in claim 1, which comprises 0.5 to 1.7 parts by weight of calcium hydroxide or magnesium hydroxide, 0.05 to 0.4 part by weight of the metal soap stabilizer and 0.1 to 0.4 part by weight of perchloric acid per part by weight of the zeolite stabilizer.
Claim 4
Dependent Claim
33 words
The composition of claim 1 wherein the zeolite stabilizer is selected from the group consisting of type A zeolite, type X zeolite, type Y zeolite, type T zeolite, chabazite, mordenite, erionite, and clinoptilplite.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein the zeolite stabilizer is a type A zeolite.
Claim 6
Dependent Claim
21 words
The composition of claim 4 wherein the type A zeolite has a hydrochloric acid-capturing capacity of from 3 to 10 ml/g.
Claim 7
Dependent Claim
26 words
The composition of claim 5 wherein the type A zeolite comprises an alkali metal aluminosilicate, alkaline earth metal aluminosilicate or a mixed alkali metal-polyvalent metal aluminosilicate.
Claim 8
Dependent Claim
72 words
A process for the preparation of a stabilizer composition for a chlorine-containing polymer, which comprises mixing a zeolite stabilizer in the powdery state with fine particulate calcium hydroxide or magnesium hydroxide and then mixing the mixture with a metal soap stabilizer, or mixing the zeolite type stabilizer intimately with fine particulate calcium hydroxide or magnesium hydroxide and a metal soap stabilizer, and adding and mixing perchloric acid into the obtained powdery mixture.
Claim 9
Dependent Claim
72 words
A process for the preparation of a stabilizer composition for a chlorine-containing polymer, which comprises mixing a zeolite stabilizer in the powdery state with fine particulate calcium hydroxide or magnesium hydroxide and then mixing the mixture with a metal soap stabilizer, or mixing the zeolite type stabilizer intimately with fine particulate calcium hydroxide or magnesium hydroxide and a metal soap stabilizer, and adding and mixing perchloric acid into the obtained powdery mixture.
Claim 10
Dependent Claim
87 words
A composition for stabilizing a chlorine-containing polymer, which comprises (i) a type A zeolite as main stabilizer component, (ii) 0.5 to 1.7 parts by weight, based on one part by weight of the zeolite, of calcium hydroxide or magnesium hydroxide, or mixture thereof, (iii) 0.05 to 0.4 part by weight based on one part by weight of the type A zeolite, of a metal soap, and (iv) 0.1 to 0.4 part by weight based on one part by weight of the type A zeolite, of perchloric acid.
Claim 11
Dependent Claim
87 words
A composition for stabilizing a chlorine-containing polymer, which comprises (i) a type A zeolite as main stabilizer component, (ii) 0.5 to 1.7 parts by weight, based on one part by weight of the zeolite, of calcium hydroxide or magnesium hydroxide, or mixture thereof, (iii) 0.05 to 0.4 part by weight based on one part by weight of the type A zeolite, of a metal soap, and (iv) 0.1 to 0.4 part by weight based on one part by weight of the type A zeolite, of perchloric acid.
Claim 12
Dependent Claim
80 words
The composition according to claim 8, wherein said type A zeolite (i) has a maximum pH value reduction gradient (Rmax) of -0.1 to -0.7 pH/meq HCl, based on 100 g of the zeolite, said Rmax being determined from the tangential line of the maximum gradient portion of the titration curve obtained by plotting the titration amount (milliequivalents) of HCl based on 100 g of the zeolite anhydride on the abscissa and the pH value of the system on the ordinate.
Claim 13
Dependent Claim
25 words
The composition according to claim 8, wherein said calcium hydroxide or magnesium hydroxide has a median diameter smaller than 20 μm based on the volume.
Claim 14
Dependent Claim
29 words
The composition according to claim 8, wherein said metal soap is a Ca, Ba, Mg or Zn salt of a higher fatty acid having 12 to 22 carbon atoms.
Claim 15
Dependent Claim
20 words
The composition according to claim 8 wherein the type A zeolite is Na zeolite, Ca zeolite or mixed Na-Ca zeolite.
Claim 16
Dependent Claim
22 words
A stabilized polyvinyl chloride resin composition which comprises polyvinyl chloride resin and a stabilizing effective amount of the composition of claim 1.
Claim 17
Dependent Claim
30 words
A method for stabilizing a chlorine-containing polymer against thermal degradation and discoloration which comprises uniformly dispersing a stabilizing effective amount of the composition of claim 1 into the chlorine-containing polymer.
Claim 18
Dependent Claim
22 words
A stabilized polyvinyl chloride resin composition which comprises polyvinyl chloride resin and a stabilizing effective amount of the composition of claim 8.
Claim 19
Dependent Claim
13 words
The stabilized polyvinyl chloride composition of claim 15 which further comprises a polyurethane.
References Cited (Backward Citations)
US3816342A
Cited
US3382199A
Cited
US3535249A
Cited
US3830751A
Cited
US4242251A
Cited
US4060508A
Cited
JPS5647926A
Cited
US4686255A
Cited
US5004776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |