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CN-121986199-A - Silicone coatings for textiles and fabrics

CN121986199ACN 121986199 ACN121986199 ACN 121986199ACN-121986199-A

Abstract

The present disclosure relates to hydrosilylation-curable silicone rubber coating compositions for treating textiles and fabrics comprising an adhesion promoter comprising a silicone bisphenol adduct compound comprising biphenyl units not directly attached to a silicon atom, and at least one Si-H group. The present disclosure also extends to textiles and fabrics coated with the cured product of the hydrosilylation-curable silicone rubber coating composition, such as inflatable safety restraint devices, e.g., airbags, and to methods of coating the textiles and fabrics (such as inflatable safety restraint devices, e.g., airbags) with the hydrosilylation-curable silicone rubber coating composition. The hydrosilylation-curable silicone rubber coating composition has excellent flowability on the textile surface and a textile coated with the cured product of the hydrosilylation-curable silicone rubber coating composition described herein is believed to have improved adhesion to woven fabrics and lower Total Volatile Organic Compounds (TVOC) than standard coating materials used to treat the textile and fabric.

Inventors

  • WANG RUI
  • D.AN

Assignees

  • 美国陶氏有机硅公司

Dates

Publication Date
20260505
Application Date
20231019

Claims (18)

  1. 1. A hydrosilylation-curable silicone rubber coating composition for treating textiles and fabrics, the hydrosilylation-curable silicone rubber coating composition comprising: a) An organopolysiloxane polymer having a viscosity at 25 ℃ of between 100mpa.s and 200,000mpa.s inclusive and having at least two unsaturated groups per molecule selected from alkenyl or alkynyl groups; b) An optional reinforcing filler comprising fumed silica, precipitated silica, or mixtures thereof; c) An organosilicon compound having an average of at least two, alternatively at least three, si-H groups per molecule and containing no biphenyl units; d) A hydrosilylation cure catalyst; e) An adhesion promoter comprising a silicone bisphenol adduct compound comprising a biphenyl unit not directly attached to a silicon atom, and at least one Si-H group, and optionally F) One or more silicone resins selected from T silicone resins (silsesquioxanes), DT silicone resins, MQ silicone resins, MDT silicone resins, MTQ silicone resins, QDT silicone resins, or mixtures thereof.
  2. 2. The hydrosilylation curable silicone rubber coating composition for treating textiles and fabrics according to claim 1, wherein the biphenyl units of the silicone bisphenol adduct compound in component (e) have the structure Wherein at least one H on one or both aromatic rings can be replaced by another group, and-X 2 -is a methylene bridge selected from -C(CH 3 ) 2 -、-C(Ph)(CH 3 )-、-C(Ph) 2 、-C(CF 3 ) 2 -、-C(CH 3 )(C 2 H 5 )-、-C(CH 2 ) 5 -、-C(CH 3 )(H)-、 or-C (H) 2 -, wherein Ph is a phenyl group.
  3. 3. The hydrosilylation-curable silicone rubber coating composition for treating textiles and fabrics according to claim 1 or 2, wherein the silicone bisphenol adduct compound in component (e) has the structure: wherein X 2 is as defined above, Z 3 is an alkylene group having 2 to 6 carbon atoms, alternatively 2 to 5 carbon atoms, alternatively 2 to 4 carbon atoms, alternatively an ethylene or propylene group; r 15 is a cyclic siloxane having the structure- (CH 3 )SiO-(R 14 H SiO) d ); R 16 is a cyclic siloxane having the structure (OSiR 14 H) d -OSi(CH 3 ) -; R 14 is an alkyl group having 1 to 6 carbon atoms, and D is an integer from 2 to 7, or an oligomer thereof.
  4. 4. A hydrosilylation curable silicone rubber coating composition for treating textiles and fabrics according to claim 3, wherein the silicone bisphenol adduct compound in component (e) has the structure Wherein n is an integer from 1 to 5.
  5. 5. The hydrosilylation-curable silicone rubber coating composition for treating textiles and fabrics according to claim 3 or 4, wherein the silicone bisphenol adduct compound in component (e) has the structure 。
  6. 6. The hydrosilylation curable silicone rubber coating composition for treating textiles and fabrics according to claim 1 or 2, wherein the silicone bisphenol adduct compound in component (e) has the structure of one of the following structures or of an oligomer of each thereof Wherein Z 3 、R 15 、R 16 and X 2 are as described above R 17 is-Si (CH 3 ) 3 、-Z 4 R 20 or- (o=) CCH 3 , R 18 is (CH 3 )Si-、R 20 Z 4 -or CH 3 C (=O) -, R 20 is an epoxide group, and Z 4 is an alkylene group having 2 to 6 carbon atoms Or alternatively Wherein R 18 、X 2 、Z 3 and R 15 are both as defined above; Or alternatively Wherein R 18 、X 2 、Z 3 R 16 and R 15 are both as defined above.
  7. 7. The hydrosilylation-curable silicone rubber coating composition for treating textiles and fabrics of claim, the hydrosilylation-curable silicone rubber coating composition has a structure comprising an intermediate cyclic siloxane (Y 2 ) Wherein X 2 、Z 3 R 16 and R 15 are each as defined above, and Y 2 is a cyclic siloxane having the structure- (CH 3 )SiO-(R 17 H SiO) e -OSi(CH 3 ) -in the form of a gel.
  8. 8. The hydrosilylation-curable silicone rubber coating composition for treating textiles and fabrics according to any one of claims 1 to 7 further comprising one or more flame retardants selected from the group consisting of precipitated calcium carbonate, aluminum trihydrate, magnesium dihydroxide, a mixture of hydromagnesite and calcite, chlorinated paraffin, hexabromocyclododecane, triphenyl phosphate, dimethyl methylphosphonate, tris (2, 3-dibromopropyl) phosphate, and mixtures thereof.
  9. 9. The hydrosilylation curable silicone coating composition of any one of claims 1 to 8 wherein component (f) is one or more MQ resins containing unsaturated groups selected from the group consisting of alkenyl groups, alkynyl groups, or mixtures of alkenyl and alkynyl groups.
  10. 10. A coated textile material comprising a textile material coated with a cured product of the hydrosilylation-curable silicone rubber coating composition of any one of claims 1 to 9.
  11. 11. The coated textile material of claim 10, wherein the textile material is a woven or nonwoven fabric made from synthetic fibers or blends of natural and synthetic fibers.
  12. 12. The coated textile material according to claim 10 or 11, which is made of polyamide fibers, polyester fibers, polyimide, polyethylene, polypropylene, polyester cotton, polyacrylonitrile fiber fabric, aramid fiber fabric, polyetherimide fiber fabric, polysulfone fiber fabric, carbon fiber fabric, rayon fiber fabric and/or glass fibers.
  13. 13. The coated textile material of claim 10,11 or 12, which is an airbag.
  14. 14. A method of coating a textile material with the hydrosilylation-curable silicone rubber coating composition of claim 10, 11, 12, or 13, the method comprising the steps of mixing the components of the hydrosilylation-curable silicone rubber coating composition of any one of claims 1 to 9, applying the hydrosilylation-curable silicone rubber coating composition to a textile surface, and curing the composition to form a coated textile material.
  15. 15. Use of a silicone bisphenol adduct compound comprising a biphenyl unit not directly linked to a silicon atom and at least one Si-H group as adhesion promoter in hydrosilylation-curable silicone rubber coating compositions for treating textiles and fabrics, said hydrosilylation-curable silicone rubber coating compositions comprising in addition to: a) An organopolysiloxane polymer having a viscosity at 25 ℃ of between 100mpa.s and 200,000mpa.s inclusive and having at least two unsaturated groups per molecule selected from alkenyl or alkynyl groups; b) An optional reinforcing filler comprising fumed silica, precipitated silica, or mixtures thereof; c) An organosilicon compound having at least two, alternatively at least three, si-H groups per molecule and containing no biphenyl units; d) A hydrosilylation cure catalyst; Optionally, a plurality of metal sheets F) One or more silicone resins selected from T silicone resins (silsesquioxanes), DT silicone resins, MQ silicone resins, MDT silicone resins, MTQ silicone resins, QDT silicone resins, or mixtures thereof.
  16. 16. The use of the silicone bisphenol adduct compound of claim 15, wherein the biphenyl units of the silicone bisphenol adduct compound in component (e) have the structure Wherein at least one H on one or both aromatic rings can be replaced by another group, and-X 2 -is a methylene bridge selected from -C(CH 3 ) 2 -、-C(Ph)(CH 3 )-、-C(Ph) 2 、-C(CF 3 ) 2 -、-C(CH 3 )(C 2 H 5 )-、-C(CH 2 ) 5 -、-C(CH 3 )(H)-、 or-C (H) 2 -, wherein Ph is a phenyl group.
  17. 17. Use of a silicone bisphenol adduct compound according to claim 15 or 16, wherein the silicone bisphenol adduct compound has a structure as defined in any of claims 3 to 7.
  18. 18. Use of a coated material according to any one of claims 10, 11 or 12 as an airbag.

Description

Silicone coatings for textiles and fabrics The present disclosure relates to hydrosilylation-curable silicone rubber coating compositions for treating textiles and fabrics, to textiles and fabrics, such as inflatable safety restraint devices, e.g., airbags, coated with the cured products of hydrosilylation-curable silicone rubber coating compositions, and to methods of coating the textiles and fabrics, such as inflatable safety restraint devices, e.g., airbags, with hydrosilylation-curable silicone rubber coating compositions. The hydrosilylation-curable silicone rubber coating composition has excellent flowability on textile surfaces and textiles coated with the cured product of the hydrosilylation-curable silicone rubber coating composition described herein, such as inflatable safety restraint devices, e.g., airbags, are believed to have improved adhesion to woven fabrics and lower Total Volatile Organic Compound (TVOC) content than standard coating materials used to treat the textiles and fabrics. Textiles and fabrics are often treated with one or more coatings to provide them with a variety of characteristics. Silicone coating compositions are used to provide a wide variety of different characteristics to textiles and/or fabrics. One of the main applications of treated textiles and fabrics is for or as inflatable safety restraint devices, in particular airbags. Airbags are widely used to cushion and protect occupants in the event of a vehicle collision or accident. They are designed to protect the driver and passengers from injury between an initial impact and a subsequent impact by inflating within 0.02 seconds to 0.12 seconds after the initial impact during a traffic accident. Inflatable safety restraint devices, such as airbags, are typically composed of a textile or fabric bag (sometimes referred to as a cushion bag), a sensor, and an inflator. In the event of an accident, sensors within the vehicle recognize the abnormal deceleration and trigger the inflator, thereby enabling the airbag to be inflated effectively in an instant. The inflation gas is delivered through the conduit and inflates the airbag, thereby cushioning the vehicle occupant (driver or passenger) to protect it from any further impact injury within the vehicle (e.g., automobile). The airbag and/or airbag fabric may be made of a woven or knitted fabric made of synthetic fibers, for example thermoplastic (such as polyamide, e.g., nylon-6, 6) or polyester (such as polyethylene terephthalate (PET)) and benefits from the application of silicone coatings, including: 1) Has improved thermal protection against high temperature gases and particulates (600 ℃ to 1,000 ℃) generated during deployment of airbags using pyrotechnic generators; 2) The flame retardance of the fabric is improved; 3) The air leakage resistance of the air bag is enhanced; 4) Improved stress resistance upon deployment of an airbag cushion bag, and 5) The silicone coating is soft and lightweight, imparting excellent flexibility to the airbag, enabling it to be folded into a more compact module. They may be made of planar fabric pieces that are coated and sewn together to provide sufficient mechanical strength, or may be integrally woven with integrally woven seams (commonly referred to as "integrally woven" or OPW). Sewn-in planar fabric airbags are typically assembled with a coated fabric surface inside the airbag. The integrally woven airbag is coated on the outside of the airbag and is capable of better maintaining air pressure after deployment, and thus is intended for use in airbags designed to remain inflated for a longer period of time after a collision or the like, for example, side curtain airbags. Today it is often necessary to have several airbags in the vehicle as a means of providing safety to the occupants in case of a collision. They include front side airbags, front center airbags, side curtain airbags, chest airbags, and/or knee airbags. Typically, the airbag is hidden within the vehicle trim to be invisible during normal operation of the vehicle. For example, front airbags can be installed in the steering wheel on the driver side of the vehicle and in the dashboard on the passenger side of the vehicle. They are arranged to act as a cushion at the point of impact, especially in a collision with the front or rear of the vehicle. They exhibit relatively high air permeability to allow the inflated airbags to deflate rapidly after an initial impact. Typically, these airbags are pieces of planar fabric that are sewn together. Side curtain airbags are increasingly used, most often being installed in headliners above doors and windows and deployed from near the roof along side windows to protect vehicle occupants from side collisions and consequent vehicle rollover accidents (i.e., vehicle rollover, bottom-up or more than one roll). As such, side curtain airbags are designed to maintain their inflated state for long periods of time (e.g., to maintain at least 50