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US 12,378,456 B2Granted
Inflatable safety devices
AssigneeDow Silicones Corporation
InventorElizabeth M. Santos
Life of this patent
Estimating the term…
Abstract
This disclosure describes inflatable articles such as airbags for inflatable safety devices for a vehicle passenger-protecting system, a process for manufacturing said inflatable articles, hydrosilylation curable silicone elastomer compositions and their uses in assembling said inflatable safety devices. The composition used comprised an organopolysiloxane based additive which comprises at least one, alternatively at least two Si—H groups per molecule and at least one, alternatively at least two functional groups per molecule, selected from anhydride groups and epoxy groups.
Claims16
An inflatable article comprising:
- a first fabric sheet and a second fabric sheet superimposed on the first fabric sheet;
- and
- a cured silicone adhesive, forming a non-sewn seam-bond between the first and second fabric sheets such that a bag structure is created;
- wherein the non-sewn seam-bond has a peak load/width of at least 3.5 kN/m;
- and
- wherein the cured silicone adhesive is the elastomeric product of a curable silicone elastomer composition comprising:
- (A) one or more organopolysiloxanes containing at least 2 alkenyl groups per molecule and having a viscosity in a range of 1,000 to 500,000 mPa·s at 25° C.;
- (B) a curing agent comprising
- (B)(i) an organic peroxide radical initiator;
- or
- (B)(ii) a hydrosilylation cure catalyst package comprising a hydrosilylation catalyst and an organosilicon compound having at least 2 Si—H groups per molecule, optionally at least 3 Si—H groups per molecule;
- (C) at least one reinforcing filler and optionally one or more non-reinforcing fillers;
- and
- (D) one or more organopolysiloxane based additives which comprise at least one Si—H group per molecule, optionally at least two Si—H groups per molecule and which comprises at least one anhydride or epoxy group per molecule, optionally at least two anhydride or epoxy groups per molecule;
- wherein component (D) is of the following formula (D1) or (D2):
- [(XR3SiO)a(HR3SiO)m(SiR3O)]—O—Y—[(SiR3O)(OSiR3H)m(OSiR3X)a] (D1)
- [(XR3SiO)a(HR3SiO)m(SiR3O)]—Z—Y—(SiR32—Z)—[(SiR3O)(OSiR3H)m(OSiR3X)a] (D2)
- wherein, in (D1) and (D2), repeating units in [] brackets have a cyclic siloxane structure with the silicon atom in (SiR3O) connecting the cyclic siloxane structure to the rest of the molecule, each R3 group is an alkyl group containing from 1 to 6 carbons, each X is a group containing an anhydride or epoxide functionality, m is an integer of at least 1, a is an integer of at least 1;
- Y is a linear siloxane group of the structure (SiPhR3O)n, (SiR32O)n, or (SiPh2O)n;
- Ph is a phenyl group, Z is an alkylene group having from 2 to 10 carbons, optionally 2 to 6 carbons, and n is an integer of from 2 to 20.
17 more elements
A seam sealant for an inflatable article, the seam sealant comprising or formed from a curable silicone elastomer composition comprising:
- (A) one or more organopolysiloxanes containing at least 2 alkenyl groups per molecule and having a viscosity in a range of 1,000 to 500,000 mPa·s at 25° C.;
- (B) a curing agent comprising
- (B)(i) an organic peroxide radical initiator;
- or
- (B)(ii) a hydrosilylation cure catalyst package comprising a hydrosilylation catalyst and an organosilicon compound having at least 2 Si—H groups per molecule, optionally at least 3 Si—H groups per molecule;
- (C) at least one reinforcing filler and optionally one or more non-reinforcing fillers;
- and
- (D) one or more organopolysiloxane based additives which comprise at least one Si—H group per molecule, optionally at least two Si—H groups per molecule and which comprises at least one anhydride or epoxy group per molecule, optionally at least two anhydride or epoxy groups per molecule;
- wherein component (D) is of the following formula (D1) or (D2):
- [(XR3SiO)a(HR3SiO)m(SiR3O)]—O—Y—[(SiR3O)(OSiR3H)m(OSiR3X)a] (D1)
- [(XR3SiO)a(HR3SiO)m(SiR3O)]—Z—Y—(SiR32—Z)—[(SiR3O)(OSiR3H)m(OSiR3X)a] (D2)
- wherein, in (D1) and (D2), repeating units in [] brackets have a cyclic siloxane structure with the silicon atom in (SiR3O) connecting the cyclic siloxane structure to the rest of the molecule, each R3 group is an alkyl group containing from 1 to 6 carbons, each X is a group containing an anhydride or epoxide functionality, m is an integer of at least 1, a is an integer of at least 1;
- Y is a linear siloxane group of the structure (SiPhR3O)n, (SiR32O)n, or (SiPh2O)n;
- Ph is a phenyl group, Z is an alkylene group having from 2 to 10 carbons, optionally 2 to 6 carbons, and n is an integer of from 2 to 20.
11 more elements
Dependencies are inferred from the claim text.