Patent EP0516108A2 successfully refreshed from Google Patents.
EP0516108A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hexenyl-containing silicone resin and method for its preparation
Assignee: DuPont Toray Specialty Materials KK
•
Filing: 1992-05-27
•
Granted: —
•
Expires: 2012-05-27
Abstract
Abstract A hexenyl-containing silicone resin is disclosed which has the average unit formula (CH₂=CHC₄H₈Me₂SiO 1/2 ) n (SiO 4/2 ) m wherein Me denotes a methyl radical, n and m are each numbers larger than zero, and the ratio n/m is 0.2 to 3.
Inventors
- 👤 Hideki c/o Dow Corning Toray Kobayashi
- 👤 Wataru c/o Dow Corning Toray Nishiumi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 21:33
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
40 words
A hexenyl-containing silicone resin with the average unit formula (CH₂=CHC₄H₈Me₂SiO 1/2 ) n (SiO 4/2 ) m wherein Me denotes a methyl radical, n and m are each numbers larger than zero, and the ratio n/m is 0.2 to 3.
Claim 2
Dependent Claim
59 words
A hexenyl-containing silicone resin which is prepared by a process comprising: cohydrolyzing, in the presence of organic solvent and aqueous acid solution, an organosilicon compound (b) having the general formula CH₂=CHC₄H₈Me₂SiX with a silicon compound (c) having the general formula SiX₄ wherein Me denotes a methyl radical and X is selected from the group consisting of halogen and alkoxy.
Claim 3
Dependent Claim
79 words
A hexenyl-containing silicone resin which is prepared by a process comprising: (I) cohydrolyzing, in the presence of organic solvent and aqueous acid solution, an organosilicon compound (b) having the following general formula CH₂=CHC₄H₈Me₂SiX with a silicon compound (c) having the general formula SiX₄ wherein Me denotes a methyl radical and X is selected from the group consisting of halogen and alkoxy; and (II) thermally dehydrating the resin formed in step (I) in the presence of an alkali metal catalyst.
Claim 4
Dependent Claim
170 words
A hexenyl-containing silicone resin which is prepared by a process comprising: (I) cohydrolyzing, in the presence of organic solvent and aqueous acid solution, a first organosilicon compound (b) having the general formula CH₂=CHC₄H₈Me₂SiX with a silicon compound (c) having the following general formula SiX₄ wherein Me denotes a methyl radical and X is selected from the group consisting of halogen and alkoxy; and (II) capping the resin formed in step (I) by reacting it with a second organosilicon compound (d) having the general formula (R'₃Si) a Q wherein R' is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms and a is 1 or 2, such that when a = 1, Q is a monovalent group selected from the group consisting of hydrogen, halogen, hydroxyl, alkoxy, -NR''₂, -ONR''₂, and -OCOR'' and when a = 2, Q is a divalent group selected from the group consisting of -O- and -NR''-, R'' in the above formulas being selected from the group consisting of hydrogen and an alkyl radical.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.