US4299759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for inhibiting the thermal or ultraviolet degradation of thermoplastic resin and thermoplastic resin composition having stability to thermal or ultraviolet degradation
Assignee: Kyowa Chemical Industry Co Ltd
•
Filing: 1980-05-16
•
Granted: 1981-11-10
•
Expires: 2000-05-16
Abstract
Abstract A method for inhibiting the thermal or ultraviolet degradation of a thermoplastic resin containing halogen and/or acidic components excepting olefinic resins, which comprises mixing said thermoplastic resin with about 0.01 to about 5 parts by weight, per 100 parts by weight of said resin, of a hydrotalcite of the following formula Mg1-xAlx(OH)2Ax/nn-xmH2O wherein O<x</=0.5, m is a positive number, and An- represents an anion having a valence of n, or a product resulting from surface-treatment of said hydrotalcite with an anionic surface-active agent, said hydrotalcite having a BET specific surface area of not more than 30 m2/g; and a thermoplastic resin composition prepared by aforesaid method.
Inventors
- 👤 Shigeo Miyata
- 👤 Masataka Kuroda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:57
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K3/10; C08K3/105; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A method for inhibiting the thermal or ultraviolet degradation of a thermoplastic resin containing halogens and/or a thermoplastic resin containing a catalyst-derived acidic sub-component excepting olefinic resins, which comprises mixing said thermoplastic resin with about 0.01 to about 5 parts by weight, per 100 parts by weight of said resin, of a hydrotalcite of the following formula Mg.sub.1-x Al.sub.x (OH).sub.2 A.sub.x/n.sup.n- ·mH.sub.2 O wherein 0<x≦0.5, m is a positive number, and A n- represents an anion having a valence of n, or a product resulting from surface-treatment of said hydrotalcite with an anionic surface-active agent, said hydrotalcite having a BET specific surface area of not more than 30 m 2 /g.
Claim 2
Independent Claim
111 words
A method for inhibiting the thermal or ultraviolet degradation of a thermoplastic resin containing halogens and/or a thermoplastic resin containing a catalyst-derived acidic sub-component excepting olefinic resins, which comprises mixing said thermoplastic resin with about 0.01 to about 5 parts by weight, per 100 parts by weight of said resin, of a hydrotalcite of the following formula Mg.sub.1-x Al.sub.x (OH).sub.2 A.sub.x/n.sup.n- ·mH.sub.2 O wherein 0<x≦0.5, m is a positive number, and A n- represents an anion having a valence of n, or a product resulting from surface-treatment of said hydrotalcite with an anionic surface-active agent, said hydrotalcite having a BET specific surface area of not more than 30 m 2 /g.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein said hydrotalcite has an average secondary particle size of not more than 5 microns.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein said hydrotalcite has a crystallite size, in the <003> direction, determined by an X-ray diffraction method, of at least 600 A.
Claim 5
Dependent Claim
29 words
The method of claim 1 wherein the amount of said hydrotalcite is about 0.01 to about 2 parts by weight per 100 parts by weight of said thermoplastic resin.
Claim 6
Dependent Claim
106 words
A thermoplastic resin composition having stability to thermal or ultraviolet degradation, comprising (a) 100 parts by weight of a thermoplastic resin containing halogens and/or a thermoplastic resin containing a catalyst-derived acidic sub-component excepting olefinic resins, and (b) about 0.01 to about 5 parts by weight of a hydrotalcite of the following formula Mg.sub.1-x Al.sub.x (OH).sub.2 A.sub.x/n.sup.n- ·mH.sub.2 O wherein 0<x≦0.5, m is a positive number, and A n- respresents an anion having a valence of n, or a product resulting from surface-treatment of said hydrotalcite with an anionic surface-active agent, said hydrotalcite having a BET specific surface area of not more than 30 m 2 /g.
Claim 7
Dependent Claim
106 words
A thermoplastic resin composition having stability to thermal or ultraviolet degradation, comprising (a) 100 parts by weight of a thermoplastic resin containing halogens and/or a thermoplastic resin containing a catalyst-derived acidic sub-component excepting olefinic resins, and (b) about 0.01 to about 5 parts by weight of a hydrotalcite of the following formula Mg.sub.1-x Al.sub.x (OH).sub.2 A.sub.x/n.sup.n- ·mH.sub.2 O wherein 0<x≦0.5, m is a positive number, and A n- respresents an anion having a valence of n, or a product resulting from surface-treatment of said hydrotalcite with an anionic surface-active agent, said hydrotalcite having a BET specific surface area of not more than 30 m 2 /g.
Claim 8
Dependent Claim
20 words
The composition of claim 5 wherein said hydrotalcite has an average secondary particle size of not more than 5 microns.
Claim 9
Dependent Claim
29 words
The composition of claims 5 or 6 wherein said hydrotalcite has a crystallite size, in the <003> direction determined by an X-ray diffraction method, of at least 600 A.
Claim 10
Dependent Claim
14 words
A composition according to claim 7 in which the thermoplastic is a halogen-containing resin.
References Cited (Backward Citations)
US4058471A
Cited
US4067847A
Cited
US4116897A
Cited
US4098762A
Cited
US4085088A
Cited
US4154718A
Cited
US4132691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |