Patent US4125555A successfully refreshed from Google Patents.
US4125555A
Expired / Lapsed
US
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Trifluoromethanesulfonates
Assignee: Dow Chemical Co
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Filing: 1977-05-23
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Granted: 1978-11-14
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Expires: 1997-05-23
Abstract
Abstract Novel esters of the formula: ##STR1## promote char formation in polymer compositions containing a monovinylidene aromatic monomer, such as styrene, and an ethylenically unsaturated carboxylic anhydride, such as maleic anhydride. In such esters, R is an n-valent tertiary hydrocarbyl radical, an n-valent tertiary chlorohydrocarbyl radical, an n-valent tertiary hydrocarbyl radical containing at least one chain linkage of oxygen or an inertly substituted n-valent tertiary hydrocarbyl radical containing at least one bromine atom.
Inventors
- 👤 Charles E. Reineke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:50
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/63; C07C309/64; C07C309/65; C08; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
An ester having the formula: ##STR8## wherein m is 1 or 2 and each R' is independently bromine or a bromophenoxy radical containing from 1 to 4 atoms of bromine.
Claim 2
Dependent Claim
30 words
An ester having the formula: ##STR8## wherein m is 1 or 2 and each R' is independently bromine or a bromophenoxy radical containing from 1 to 4 atoms of bromine.
Claim 3
Dependent Claim
13 words
The ester of claim 1 wherein each R' is individually bromine or tribromophenoxy.
Claim 4
Dependent Claim
22 words
The ester of claim 2 selected from the group consisting of 3-bromo-2,2-bis(bromomethyl)propyl trifluoromethanesulfonate; 2,2-bis(bromomethyl)-1,3-propanediyl trifluoromethanesulfonate; 3-bromo-2,2-bis [(2,4,6-tribromophenoxy)methyl]-propyl trifluoromethanesulfonate; or 2,2-bis[(2,4,6-tribromophenoxy)methyl]-1,3-propanediyl trifluoromethane sulfonate.
Claim 5
Dependent Claim
9 words
The ester of claim 2 wherein m is 2.
Claim 6
Dependent Claim
11 words
The ester of claim 4 corresponding to the name 2,2-bis(bromomethyl)-1,3-propanediyl trifluoromethanesulfonate.
Claim 7
Dependent Claim
11 words
The ester of claim 4 corresponding to the name 2,2-bis[(2,4,6-tribromophenxoy)methyl]-1,3-propanediyl trifluoromethanesulfonate.
Claim 8
Dependent Claim
11 words
The ester of claim 2 corresponding to the name 3-bromo-2,2-bis(bromomethyl)propyl trifluoromethanesulfonate.
Claim 9
Dependent Claim
11 words
The ester of claim 2 corresponding to the name 3-bromo-2,2-bis[(2,4,6-tribromophenoxy)methyl]propyl trifluoromethanesulfonate.
References Cited (Backward Citations)
US3419595A
Cited
US4038245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |