Non-flowing silicone adhesive
AssigneeAvery Dennison Corporation
InventorsDominique Wouters, Jef Keustermans, Peter Lenaerts
Life of this patent
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Abstract
Adhesive formulations are described that upon sufficient curing and drying, are not sticky or tacky at room temperature, yet can be heat bonded. The adhesives are particularly useful for use in bonding brake components together and find wide application in vehicle brake systems. When used in such systems, the adhesives do not flow in parking applications yet sufficiently dampen vibration in slowing or stopping applications to counter brake squeal. The adhesives can be provided in a tape form and used for bonding brake shims to brake pads in electronic parking brake systems.
Claims28
A hot bond silicone adhesive consisting of, prior to curing:
- (i) 100 parts by weight of a polydimethylsiloxane gum and resin with vinyl and hydride functionality;
- (ii) 1-60 parts by weight of a silicone resin containing tetra(trimethysiloxy) silane;
- (ii) 0-1.5 parts by weight of a silicone hydride crosslinker;
- (iii) 0.1-1.6 parts by weight of a platinum based catalyst;
- and
- (iv) an optional inhibitor;
- wherein after curing, the hot bond silicone adhesive exhibits:
- (i) a Quick-Stick value less than 5 N/25 mm,
- (ii) a Peel Adhesion to Stainless Steel (PASS) value at 100° C. greater than 5 N/25 mm, and
- (iii) an Adhesive Bleeding Test (ABT) value greater than or equal to 7,500 kgf at 200° C.;
- and
- (iv) substantially no tack in dry form using finger pressure at room temperature.
A hot bond silicone adhesive consisting essentially of, prior to curing:
- (i) 100 parts by weight of a polydimethylsiloxane gum and resin with vinyl and hydride functionality;
- (ii) 1-60 parts by weight of a silicone resin containing tetra(trimethysiloxy) silane;
- (ii) 0-1.5 parts by weight of a silicone hydride crosslinker;
- (iii) 0.1-1.6 parts by weight of a platinum based catalyst;
- and
- (iv) an optional inhibitor;
- wherein, after curing, the cured hot bond silicone adhesive exhibits a Quick-Stick value less than 5 N/25 mm, a Peel Adhesion to Stainless Steel (PASS) value at 100° C. greater than 5 N/25 mm, an Adhesive Bleeding Test (ABT) value greater than or equal to 7,500 kgf at 200° C., and substantially no tack in dry form using finger pressure at room temperature.
Dependencies are inferred from the claim text.