Optical article comprising a double-layer abrasion and scratch resistant coating and method for production thereof
申请人:ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
公开号:US10222511B2
公开(公告)日:2019-03-05
The invention relates to an optical article comprising a substrate coated with an abrasion and scratch resistant coating composed of a lower layer and an upper layer that do adhere to each other, the upper layer and the lower layer being layers of cured upper and lower layer compositions, said upper layer composition comprising at least one organosilane, or a hydrolyzate thereof, of formula RnYmSi(X)4-n-m and at least one compound, or a hydrolyzate thereof, of formula M(Z)x, the following ratio being lower than 2.3:
Rs
=
theoretical
dry
matter
weight
of
compounds
I
in
the
upper
layer
composition
theoretical
dry
matter
weight
of
compounds
II
in
the
upper
layer
composition
said lower layer composition comprising at least one organosilane, or a hydrolyzate thereof, of formula R′n′Y′m′Si(X′)4-n′-m′ and, optionally, at least one compound, or a hydrolyzate thereof, of formula M′(Z′)y, the following ratio being higher than 2.3:
Ri
=
theoretical
dry
matter
weight
of
compounds
III
in
the
lower
layer
composition
theoretical
dry
matter
extract
of
compounds
IV
in
the
lower
layer
composition
In the hereabove formulas, M and M′ are metals or metalloids of valences x and y, at least equal to 4, R and R′ groups are monovalent organic groups that are bound to silicon through a carbon atom and that contain at least one epoxy function, X, X′, Z and Z′ groups are hydrolyzable groups, Y and Y′ are monovalent organic groups that are bound to silicon through a carbon atom, n, m, n′ and m′ being integers such that n and n′=1 or 2 with n+m and n′+m′=1 or 2.
本发明涉及一种光学制品,包括涂有耐磨耐刮涂层的基材,该涂层由相互粘附的下层和上层组成,上层和下层是固化的上层和下层组合物层,所述上层组合物包括至少一种式 RnYmSi(X)4-n-m 的有机硅烷或其水解物,以及至少一种式 M(Z)x 的化合物或其水解物,以下比例低于 2.3:
Rs
=
理论
干式
问题
重量
的
化合
I
于
的
鞋帮
层次
构成
理论
干式
问题
重量
的
化合
II
于
的
鞋帮
层次
构成
所述下层组合物包括至少一种式 R′n′Y′m′Si(X′)4-n′-m′的有机硅烷或其水解物,以及至少一种式 M′(Z′)y的化合物或其水解物,以下比例高于 2.3:
Ri
=
理论
干式
问题
重量
的
化合
III
于
的
降低
层次
构成
理论
干式
问题
摘录
的
化合
四
于
的
降低
层次
构成
在上述式子中,M和M′是价数x和y至少等于4的金属或类金属,R和R′基团是通过一个碳原子与硅结合并至少含有一个环氧官能团的一价有机基团、X、X′、Z 和 Z′基团是可水解基团,Y 和 Y′是通过一个碳原子与硅结合的一价有机基团,n、m、n′和 m′是整数,使得 n 和 n′=1 或 2,n+m 和 n′+m′=1 或 2。