US4192922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finely divided expandable styrene polymers
Assignee: Shell Internationale Research Maatschappij BV
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Filing: 1979-02-21
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Granted: 1980-03-11
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Expires: 1999-02-21
Abstract
Abstract The invention provides finely grained, expandable particles of a styrene homopolymer or copolymer which contain an expanding agent and a flameproofing organic halogen compound as well as, in addition a 2,4-diamino-1,3,5-triazine derivative.
Inventors
- 👤 Johann Mixich
- 👤 Horst Jastrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:05
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/16; C08J9/20; C08J9/0014; C08J9/0028; C08K; C08K5/00; C08K5/0008; C08K5/0066; C08J2325/00; C08J2325/02; C08J2325/04; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
132 words
Foamable particles of a styrene homo- or copolymer containing an expanding agent and a flameproofing organic halogen compound, which comprise in addition from 0.0001 to 0.1, preferably 0.001 to 0.05, % by weight, relative to the polymer, of a 2,4-diamino-1,3,5-triazine derivative of the formula ##STR3## in which R is an alkyl radical having from 1 to 20, preferably 4 to 15, carbon atoms, where optionally a H atom in ω-position is substituted by a 2,4-diamino-1,3,5-triazine-6-yl radical; or a cycloalkyl radical having from 5 to 12 carbon atoms, or a cycloalkyl-alkyl or alkyl-cycloalkyl radical having from 6 to 13 carbon atoms, or an aryl radical having from 5 to 12, preferably 6 to 12, carbon atoms; or an alkylaryl or aralkyl radical having from 6 to 13, preferably 7 to 13, carbon atoms.
Claim 2
Dependent Claim
132 words
Foamable particles of a styrene homo- or copolymer containing an expanding agent and a flameproofing organic halogen compound, which comprise in addition from 0.0001 to 0.1, preferably 0.001 to 0.05, % by weight, relative to the polymer, of a 2,4-diamino-1,3,5-triazine derivative of the formula ##STR3## in which R is an alkyl radical having from 1 to 20, preferably 4 to 15, carbon atoms, where optionally a H atom in ω-position is substituted by a 2,4-diamino-1,3,5-triazine-6-yl radical; or a cycloalkyl radical having from 5 to 12 carbon atoms, or a cycloalkyl-alkyl or alkyl-cycloalkyl radical having from 6 to 13 carbon atoms, or an aryl radical having from 5 to 12, preferably 6 to 12, carbon atoms; or an alkylaryl or aralkyl radical having from 6 to 13, preferably 7 to 13, carbon atoms.
Claim 3
Dependent Claim
160 words
Process for the preparation of foamable polymer particles by homo-polymerization or copolymerization of styrene in aqueous suspension in the presence of an expanding agent and a flameproofing organic halogen compound, which comprises adding to the polymer batch from 0.0001 to 0.1, preferably 0.001 to 0.05, weight %, relative to the amount of monomer styrene or the total amount of monomer styrene and comonomer, of particles of a 2,4-diamino-1,3,5-triazine derivative of the formula ##STR4## in which R is an alkyl radical having from 1 to 20, preferably 4 to 15, carbon atoms, where optionally a H atom in ω-position is substituted by a 2,4-diamino-1,3,5-triazine-6-yl radical; or a cycloalkyl radical having from 5 to 12 carbon atoms, or a cycloalkyl-alkyl or alkyl-cycloalkyl radical having from 6 to 13 carbon atoms, or an aryl radical having from 5 to 12, preferably 6 to 12, carbon atoms; or an alkylaryl or aralkyl radical having from 6 to 13, preferably 7 to 13, carbon atoms.
Claim 4
Dependent Claim
160 words
Process for the preparation of foamable polymer particles by homo-polymerization or copolymerization of styrene in aqueous suspension in the presence of an expanding agent and a flameproofing organic halogen compound, which comprises adding to the polymer batch from 0.0001 to 0.1, preferably 0.001 to 0.05, weight %, relative to the amount of monomer styrene or the total amount of monomer styrene and comonomer, of particles of a 2,4-diamino-1,3,5-triazine derivative of the formula ##STR4## in which R is an alkyl radical having from 1 to 20, preferably 4 to 15, carbon atoms, where optionally a H atom in ω-position is substituted by a 2,4-diamino-1,3,5-triazine-6-yl radical; or a cycloalkyl radical having from 5 to 12 carbon atoms, or a cycloalkyl-alkyl or alkyl-cycloalkyl radical having from 6 to 13 carbon atoms, or an aryl radical having from 5 to 12, preferably 6 to 12, carbon atoms; or an alkylaryl or aralkyl radical having from 6 to 13, preferably 7 to 13, carbon atoms.
References Cited (Backward Citations)
US4049622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |