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US 6,475,329 B1Granted
Primer for silicone compositions
AssigneeTyco Electronics Corporation
InventorsClaude Daniel Johnson, Eileen Marie Hawkins
Life of this patent
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Abstract
A combination of a specific first coupling agent, second coupling agent, and carrier solvent is synergistically effective as a primer for improving the adhesion of silicone compositions, especially hydrosilation cured silicone gels, to polymer surfaces. The first coupling agent is a titanium-, boron-, or zirconium-containing coupling agent, or a combination of such. The second coupling agent is a silane coupling agent.
Claims15
A composition comprising:
- (a) between 0.125 and 2.5 weight percent of a first coupling agent which is
- (i) a boron-containing coupling agent selected from the group consisting of trimethoxyboroxine, triphenoxyboroxine, triphenyl borate and tris(trimethylsiloxy)boron;
- or
- (ii) a combination of the aforesaid boron-containing coupling agent;
- and
- (1) a titanium containing coupling agent selected from the group consisting of tetra-2-ethylhexyl titanate, tetra-n-butyl titanate, tetracresyl titanate, and tetramethoxypropoxy titanate;
- and
- (2) a zirconium-containing coupling agent selected from the group consisting of zirconium tetra-2-ethylhexanoate, tetraphenoxy zirconate and tetra-2-ethylhexylzirconate;
- (b) between 0.125 and 2.5 weight percent of a second coupling agent which is a silane coupling agent selected from the group consisting of tris(3-(trimetho-xysilyl)propyl)isocyanurate and N-phenyl-y-aminopropyltrimethoxysilane;
- and
- (c) between 99.75 and 95.0 weight percent of a carrier solvent;
- the weight percent being based on the combined weights of first and second coupling agent and carrier solvent.
9 more elements
A composition comprising:
- (a) between 0.125 and 2.5 weight percent of a first coupling agent which is
- (i) a titanium containing coupling agent selected from the group consisting of tetra-2-ethylhexyl titanate, tetra-n-butyl titanate, tetracresyl titanate, and tetramethoxypropoxy titanate;
- (ii) a boron-containing coupling agent selected from the group consisting of trimethoxyboroxine, triphenoxyboroxine, triphenyl borate and tris(trimethylsiloxy)boron;
- (iii) a zirconium-containing coupling agent selected from the group consisting of zirconium tetra-2-ethylhexanoate, tetraphenoxy zirconate and tetra-2-ethylhexylzirconate;
- or
- (iv) a combination of the aforesaid titanium-, boron-, and zirconium-containing coupling agents;
- (b) between 0.125 and 2.5 weight percent of a second coupling agent which is a silane coupling agent which is tris(3-(trimethoxysilyl)-propyl)isocyanurate;
- and
- (c) between 99.75 and 95.0 weight percent of a carrier solvent;
- the weight percent being based on the combined weights of first and second coupling agent and carrier solvent.
7 more elements
A method of adhesively bonding a crosslinked silicone composition to a polymer surface, comprising the steps of:
- (I) providing an article having a polymer surface to which a crosslinked silicone resin is to be adhesively bonded;
- (II) coating the polymer surface with a composition comprising
- (a) between 0.125 and 2.5 weight percent of a first coupling agent which is
- (i) a boron-containing coupling agent selected from the group consisting of trimethoxyboroxine, triphenoxyboroxine, triphenyl borate and tris(trimethylsiloxy)boron;
- or
- (ii) a combination of the aforesaid boron-containing coupling agent;
- and
- (1) a titanium containing coupling agent selected from the group consisting of tetra-2-ethylhexyl titanate, tetra-n-butyl titanate, tetracresyl titanate, and tetramethoxypropoxy titanate;
- and
- (2) a zirconium-containing coupling agent selected from the group consisting of zirconium tetra-2-ethylhexanoate, tetraphenoxy zirconate and tetra-2-ethylhexyl zirconate;
- (b) between 0.125 and 2.5 weight percent of a second coupling agent which is a silane coupling agent selected from the group consisting of tris(3-(trimethoxysilyl)propyl)isocyanurate and N-phenyl-γ-aminopropyltrimethoxysilane;
- and
- (c) between 99.75 and 95.0 weight percent of a carrier solvent;
- the weight percent being based on the combined weights of first and second coupling agent and carrier solvent;
- (III) drying the composition;
- (IV) applying onto the polymer surface an uncrosslinked silicone composition;
- and (V) crosslinking the silicone composition to form an adhesive bond between crosslinked silicone composition and the polymer surface.
14 more elements
A method of adhesively bonding a crosslinked silicone composition to a polymer surface, comprising the steps of:
- (I) providing an article having a polymer surface to which a crosslinked silicone resin is to be adhesively bonded;
- (II) coating the polymer surface with a composition comprising
- (a) between 0.125 and 2.5 weight percent of a first coupling agent which is
- (i) a titanium containing coupling agent selected from the group consisting of tetra-2-ethylhexyl titanate, tetra-n-butyl titanate, tetracresyl titanate, and tetramethoxypropoxy titanate;
- (ii) a boron-containing coupling agent selected from the group consisting of trimethoxyboroxine, triphenoxyboroxine, triphenyl borate and tris(trimethylsiloxy) boron;
- (iii) a zirconium-containing coupling agent selected from the group consisting of zirconium tetra-2-ethylhexanoate, tetraphenoxy zirconate and tetra-2-ethylhexyl zirconate;
- and
- (iv) combinations of the aforesaid titanium-, boron-, and zirconium-containing coupling agents;
- (b) between 0.125 and 2.5 weight percent of a second coupling agent which is a silane coupling agent which is tris(3-(trimethoxysilyl)propyl)isocyanurate;
- and
- (c) between 99.75 and 95.0 weight percent of a carrier solvent;
- the weight percent being based on the combined weights of first and second coupling agent and carrier solvent;
- (III) drying the composition;
- (IV) applying onto the polymer surface an uncrosslinked silicone composition;
- and
- (V) crosslinking the silicone composition to form an adhesive bond between crosslinked silicone composition and the polymer surface.
13 more elements
Dependencies are inferred from the claim text.