US4614633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Release agent for polyurethane molding compositions
Assignee: Bayer AG
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Filing: 1985-01-09
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Granted: 1986-09-30
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Expires: 2005-01-09
Abstract
Abstract A release agent for a polyurethane molding composition by weight comprising about 90 to 97 parts of an organic solvent and about 10 to 3 parts of a TiO group-containing polysiloxane.
Inventors
- 👤 Hans-Horst Steinbach
- 👤 Matthias Rieder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:09
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/58; B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; C08L; C08L83/00; C08L83/14; B29K; B29K2075/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
In the production of a molded polyurethane article wherein a mold is coated with a release agent, polyurethane is supplied to the mold, the article is removed from the mold, and additional articles are cast in the mold, the improvement which comprises employing as the release agent a composition comprising about 90 to 97 parts by weight of an organic solvent and about 10 to 3 parts by weight of a TiO group-containing polysiloxane wherein in said TiO group-containing polysiloxane TiO groups are incorporated into the polysiloxane wherein there are about 1 to 100 SiO groups per TiO group in said TiO group-containing polysiloxane.
Claim 2
Dependent Claim
104 words
In the production of a molded polyurethane article wherein a mold is coated with a release agent, polyurethane is supplied to the mold, the article is removed from the mold, and additional articles are cast in the mold, the improvement which comprises employing as the release agent a composition comprising about 90 to 97 parts by weight of an organic solvent and about 10 to 3 parts by weight of a TiO group-containing polysiloxane wherein in said TiO group-containing polysiloxane TiO groups are incorporated into the polysiloxane wherein there are about 1 to 100 SiO groups per TiO group in said TiO group-containing polysiloxane.
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) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |