US4098762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium hydroxides having novel structure, process for production thereof, and resin compositions containing them
Assignee: Kyowa Chemical Industry Co Ltd
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Filing: 1976-05-27
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Granted: 1978-07-04
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Expires: 1996-05-27
Abstract
Abstract A novel magnesium hydroxide of the formula Mg(OH)2having (i) a strain in the (101) direction of not more than 3.0 x 10-3, (ii) a crystallite size in the (101) direction of more than 800 A, and (iii) a specific surface area of less than 20 m2/g. The magnesium hydroxide, if desired as coated with anionic surfactants, is useful, for example, as fire retardants for thermoplastic synthetic resins and aqueous paints. The novel magnesium hydroxide is prepared by heating in an aqueous medium at an elevated pressure a novel basic magnesium chloride or nitrate of this invention expressed by the formula Mg(OH)2-xAx.mH2O wherein A is Cl or NO3, x is a number of more than 0 but less than 0.2, and m is a number of 0 to 6.
Inventors
- 👤 Shigeo Miyata
- 👤 Masataka Kuroda
- 👤 Akira Okada
- 👤 Tosihumi Okazaki
- 👤 Mitsuo Takasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:00
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/26; C01F5/30; C01F5/14; C01F5/38; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K9/00; C08K9/04; C01P; C01P2002/00; C01P2002/50; C01P2002/52; C01P2002/60; C01P2002/70; C01P2002/72; C01P2004/00; C01P2004/10; C01P2004/60; C01P2004/61; C01P2004/80; C01P2004/82; C01P2006/00; C01P2006/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
64 words
Solid particles of a magnesium hydroxide coated with an anionic surface active agent, said magnesium hydroxide having (i) a strain in the <101> direction of not more than 3.0 × 10 -3 , (ii) a crystallite size in the <101> direction of more than 800 A, and (iii) a specific surface area, determined by the BET method, of less than 20 m 2 /g.
Claim 2
Dependent Claim
64 words
Solid particles of a magnesium hydroxide coated with an anionic surface active agent, said magnesium hydroxide having (i) a strain in the <101> direction of not more than 3.0 × 10 -3 , (ii) a crystallite size in the <101> direction of more than 800 A, and (iii) a specific surface area, determined by the BET method, of less than 20 m 2 /g.
Claim 3
Dependent Claim
88 words
A thermoplastic synthetic resin composition comprising 100 parts by weight of a thermoplastic synthetic resin and about 50 to about 250 parts by weight of a magnesium hydroxide coated or uncoated with an anionic surface active agent, said magnesium hydroxide having (i) a strain in the <101> direction of not more than 3.0 × 10 -3 , (ii) a crystallite size in the <101> direction of more than 800 A, and (iii) a specific surface area, determined by the BET method, of less than 20 m 2 /g.
Claim 4
Dependent Claim
88 words
A thermoplastic synthetic resin composition comprising 100 parts by weight of a thermoplastic synthetic resin and about 50 to about 250 parts by weight of a magnesium hydroxide coated or uncoated with an anionic surface active agent, said magnesium hydroxide having (i) a strain in the <101> direction of not more than 3.0 × 10 -3 , (ii) a crystallite size in the <101> direction of more than 800 A, and (iii) a specific surface area, determined by the BET method, of less than 20 m 2 /g.
Claim 5
Dependent Claim
124 words
The solid particles of magnesium hydroxide according to claim 1 wherein said anionic surface active agent is a member selected from the group consisting of alkali metal salts of higher fatty acids of the formula RCOOM wherein R represents an alkyl group containing 8 to 30 carbon atoms, and M represents an alkali metal atom, alkylsulfate salts of the formula ROSO.sub.3 M wherein R and M are the same as defined above, alkylsulfonate salts of the formula RSO.sub.3 M wherein R and M are the same as defined above, alkylarylsulfonate salts of the formula R-aryl-SO.sub.3 M wherein R and M are the same as defined above, and sulfosuccinate ester salts of the formula ##STR2## wherein R and M are the same as defined above.
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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |