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1. WO2020001399 - MULTI-LAYERED, FOOD-SAFE AND NON-STICK COATING

Publication Number WO/2020/001399
Publication Date 02.01.2020
International Application No. PCT/CN2019/092541
International Filing Date 24.06.2019
IPC
B PERFORMING OPERATIONS; TRANSPORTING
32
LAYERED PRODUCTS
B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27
Layered products essentially comprising synthetic resin
06
as the main or only constituent of a layer next to another layer of a specific substance
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
D
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
183
Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
10
Block or graft copolymers containing polysiloxane sequences
C CHEMISTRY; METALLURGY
09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
D
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
183
Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
04
Polysiloxanes
06
containing silicon bound to oxygen-containing groups
B32B 27/06 (2006.01)
C09D 183/10 (2006.01)
C09D 183/06 (2006.01)
CPC
B32B 27/06
C08G 77/02
C09D 183/04
Applicants
  • NANO AND ADVANCED MATERIALS INSTITUTE LIMITED [CN/CN]; Units 515-517, 5/F, Lakeside 1, No. 8 Science Park West Avenue, Hong Kong Science Park, Shatin New Territories, Hong Kong, CN
Inventors
  • MENG, Wenjun; CN
  • LI, Deryck Hinyeung; CN
  • LO, Michael Kwunfung; CN
  • LI, Sheungyin; CN
  • ZHAO, Yueyue; CN
  • KWOK, Connie Saukuen; CN
Agents
  • DHC IP ATTORNEYS; Suite 1810, Modern International Commercial Building, Cross of Fuhua Road and Jintian Road Futian District Shenzhen, Guangdong 518048, CN
Priority Data
62/689,24324.06.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MULTI-LAYERED, FOOD-SAFE AND NON-STICK COATING
(FR) REVÊTEMENT MULTICOUCHE, SANS DANGER POUR LES ALIMENTS ET NON COLLANT
Abstract
(EN)
A multi-layered, food-safe, and non-stick coating comprising at least one silica gel layer(202) and at least one polydimethylsiloxane-based layer being coated on a substrate(201) is provided, wherein the silica gel layer(202) is superhydrophobic and prepared by adding hexamethyldisilazane into an aged silica sol formed by hydrolysis and condensation of tetraethyl orthosilicate(203b) in a mixture of ethanol, ammonia and water, and the polydimethylsiloxane-based layer is hydrophobic and prepared by partially cross-linking silane moieties of polydimethylsiloxane(203a) with tetraethyl orthosilicate(203b) such that polydimethylsiloxane(203a) is silanol-terminated and covalently grafted onto said silica gel layer(202), and the substrate(201) coated with the multi-layered, food-safe, and non-stick coating has a contact angle of at least 50° with respect to a viscous food substance.
(FR)
L'invention concerne un revêtement multicouche, sans danger pour les aliments et non collant, comprenant au moins une couche de gel de silice (202) et au moins une couche à base de polydiméthylsiloxane qui est revêtue sur un substrat (201), la couche de gel de silice (202) étant superhydrophobe et préparée par ajout d'hexaméthyldisilazane à un sol de silice vieilli formé par hydrolyse et condensation d'orthosilicate de tétraéthyle (203b) dans un mélange d'éthanol, d'ammoniac et d'eau, et la couche à base de polydiméthylsiloxane étant hydrophobe et préparée par réticulation partielle de fractions silane de polydiméthylsiloxane (203a) avec de l'orthosilicate de tétraéthyle (203b), de sorte que le polydiméthylsiloxane (203a) soit terminé par un silanol et greffé de manière covalente sur ladite couche de gel de silice (202), et que le substrat (201) revêtu du revêtement multicouche, sans danger pour les aliments et non collant présente un angle de contact d'au moins 50° par rapport à une substance alimentaire visqueuse.
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