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Patent US4029614A successfully refreshed from Google Patents.
US4029614A
Expired / Lapsed
US
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Particulate expandable styrene polymers having good processability
Assignee: BASF SE
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Filing: 1976-04-12
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Granted: 1977-06-14
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Expires: 1996-04-12
Abstract
Abstract Particulate expandable styrene polymers containing organic halogen compounds and, to improve processability, from 0.0001 to 1.0% by weight, based on the styrene polymer, of an amine which is soluble in styrene and free from hydroxyl groups.
Inventors
- 👤 Eckhard Nintz
- 👤 Rupert Schick
- 👤 Karl Seegmueller
- 👤 Erhard Stahnecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:27
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; C; C08; C08J; C08J9/00; C08J9/0014; C08J9/16; C08K; C08K5/00; C08K5/02; C08K5/16; C08K5/17; F16; F16J; F16J15/00; F16J15/44; F16J15/441; C08J2325/00; C08J2325/02; C08J2325/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
Expandable styrene polymers containing a foaming agent and from about 0.05 to 1% by weight of the styrene polymer of brominated oligomers of butadiene or styrene, brominated phosphoric acid esters, nuclear brominated phenyl alkyl ethers, pentabromo monochlorocyclohexane or 1,3,4-tribromo-4-phenylbutanone-(2) and additionally containing from 0.0001 to 1.0% by weight of the styrene polymer, of a styrene-soluble amine free from hydroxyl groups, said amine having the formula NR 1 R 2 R 3 , wherein R 1 is an aliphatic or cycloaliphatic hydrocarbon radical of from 4 to 20 carbon atoms, R 2 is hydrogen or an aliphatic or cycloaliphatic hydrocarbon radical of from 1 to 15 carbon atoms, and R 3 is hydrogen or an aliphatic or aromatic hydrocarbon of from 1 to 15 carbon atoms, with the proviso, that when R 2 and R 3 are both hydrogen, then R 1 has from 6 to 20 carbon atoms.
Claim 2
Dependent Claim
148 words
Expandable styrene polymers containing a foaming agent and from about 0.05 to 1% by weight of the styrene polymer of brominated oligomers of butadiene or styrene, brominated phosphoric acid esters, nuclear brominated phenyl alkyl ethers, pentabromo monochlorocyclohexane or 1,3,4-tribromo-4-phenylbutanone-(2) and additionally containing from 0.0001 to 1.0% by weight of the styrene polymer, of a styrene-soluble amine free from hydroxyl groups, said amine having the formula NR 1 R 2 R 3 , wherein R 1 is an aliphatic or cycloaliphatic hydrocarbon radical of from 4 to 20 carbon atoms, R 2 is hydrogen or an aliphatic or cycloaliphatic hydrocarbon radical of from 1 to 15 carbon atoms, and R 3 is hydrogen or an aliphatic or aromatic hydrocarbon of from 1 to 15 carbon atoms, with the proviso, that when R 2 and R 3 are both hydrogen, then R 1 has from 6 to 20 carbon atoms.
Claim 3
Dependent Claim
18 words
Expandable styrene polymers as claimed in claim 1, in which the styrene soluble amine is a primary amine.
Claim 4
Dependent Claim
38 words
Expandable styrene polymers as claimed in claim 1, in which the styrene-soluble amine is a secondary amine having as side chain a linear, branched or cyclic alkyl radical, the amine nitrogen atom optionally forming part of a ring.
Claim 5
Dependent Claim
37 words
Expandable styrene polymers as claimed in claim 1, wherein the styrene-soluble amine is a tertiary amine having as side chain a linear, branched or cyclic alkyl radical, the amine nitrogen atom optionally forming part of a ring.
Claim 6
Dependent Claim
15 words
Expandable styrene polymers as claimed in claim 4, wherein the side chain contains aromatic groups.
Claim 7
Dependent Claim
18 words
Expandable styrene polymers as claimed in claim 1, wherein the styrene-soluble amine contains 2 or more amino groups.
Claim 8
Dependent Claim
23 words
Expandable styrene polymers as claimed in claim 1, wherein the styrene-soluble amine contains functional groups, except hydroxyl groups, in the alkyl side chains.
Claim 9
Dependent Claim
29 words
Expandable styrene polymers as claimed in claim 1, wherein the styrene-soluble amine is present in the amount of from 0.001 to 0.1% by weight based on the styrene polymer.
References Cited (Backward Citations)
US3274133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |