US4417023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysiloxane stabilizers for flatting agents in radiation hardenable compositions
Assignee: Diamond Shamrock Chemicals Co
•
Filing: 1982-02-10
•
Granted: 1983-11-22
•
Expires: 2002-02-10
Abstract
Abstract Flatting agents, such as silica, talc and carbonates are present in radiation hardenable compositions in order to reduce gloss and obtain a flat appearance in cured coating. However, the flatting agent settles in the radiation-hardenable composition. To reduce settling of the flatting agent, one or more stabilizers are added to the composition. Useful stabilizers are alkylene oxide adducts of particular siloxane copolymers.
Inventors
- 👤 Joseph V. Sinka
- 👤 Robert A. LieBerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:54
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
113 words
In a radiation hardenable composition containing at least one radiation-hardenable oligomer and at least one flatting agent, at least one stabilizer present in an amount sufficient to reduce settling of said flatting agent, said stabilizer being alkylene oxide adducts of siloxane copolymers having the following structure: ##STR22## where x is about 3, y is about 11, the siloxane backbone has a molecular weight of about 1,000 and constitutes about 20% by weight of the total molecule, R is --CH 2 --CH 2 --O--CH 2 CH 2 --O) a ##STR23## where a and b are present in a ratio of about 1:1, R has a molecular weight of about 1200 and R' is H.
Claim 2
Dependent Claim
113 words
In a radiation hardenable composition containing at least one radiation-hardenable oligomer and at least one flatting agent, at least one stabilizer present in an amount sufficient to reduce settling of said flatting agent, said stabilizer being alkylene oxide adducts of siloxane copolymers having the following structure: ##STR22## where x is about 3, y is about 11, the siloxane backbone has a molecular weight of about 1,000 and constitutes about 20% by weight of the total molecule, R is --CH 2 --CH 2 --O--CH 2 CH 2 --O) a ##STR23## where a and b are present in a ratio of about 1:1, R has a molecular weight of about 1200 and R' is H.
Claim 3
Dependent Claim
28 words
The composition of claim 1 where there is present from about 0.1% to about 5.0% by weight of stabilizer based upon the weight of the total radiation-hardenable composition.
References Cited (Backward Citations)
US2268273A
Cited
US3594410A
Cited
US3518288A
Cited
US3669608A
Cited
US4088498A
Cited
US3918393A
Cited
US3783004A
Cited
US3857822A
Cited
US4048036A
Cited
US4113593A
Cited
US4058443A
Cited
US4101464A
Cited
US4036790A
Cited
US4180474A
Cited
US4179478A
Cited
US4216267A
Cited
US4177074A
Cited
US4143013A
Cited
US4177333A
Cited
US4170663A
Cited
US4169167A
Cited
US4184021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |