Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Reexamination Certificate
1999-09-30
2001-06-26
Moore, Margaret G. (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
C528S031000, C528S032000, C528S043000, C556S440000, C556S449000
Reexamination Certificate
active
06252029
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a novel organosilicon compound containing hydroxyphenyl groups and aliphatic unsaturated bonds within the same molecules, and to method for manufacturing this compound.
The present invention also relates to a curable organosiloxane composition, and more particularly relates to a curable organosiloxane composition which can be cured through a hydrosilylation reaction to form a cured product which will adhere well to a variety of thermosetting organic resins.
BACKGROUND OF THE INVENTION
Silicone compounds whose main components are an alkenyl group-containing organosiloxane and an organohydrogenpolysiloxane and which cure in the presence of a platinum-based catalyst are called addition reaction-curing silicone compositions, and are used in many different fields of industry. However, when this type of silicone composition cures, the surface thereof becomes inert, which makes it extremely difficult to bond an epoxy resin, phenol resin, or any of various other organic resins to this cured material. Various attempts have therefore been made at bonding these materials together, such as subjecting the surface of a cured product of an addition reaction-curing silicone composition to an ozone treatment, then bringing one of various organic resins into contact with this ozone-treated surface and curing it. This method, however, is not satisfactory for practical purposes because of its drawback in that adhesion decreases over time. Accordingly, there is a need for an adhesion imparter for bonding various organic resins to the cured product of an addition reaction-curing silicone composition. It is believed that an organosilicon compound containing hydroxyphenyl groups (as functional groups for enhancing adhesion with an organic resin) and alkenyl groups (as functional groups incorporated into the addition reaction cured product) in the same molecules would be effective as this adhesion imparter.
REFERENCES:
patent: 3328450 (1967-06-01), Plueddemann
patent: 3931267 (1976-01-01), Brode
patent: 5204438 (1993-04-01), Snow et al.
patent: 5266663 (1993-11-01), Haus et al.
patent: 5726271 (1998-03-01), Furukawa et al.
Amako Masaaki
Okawa Tadashi
Dow Corning Toray Silicone Co. Ltd.
Milco Larry A.
Moore Margaret G.
Troy Timothy J.
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