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US 12,350,923 B2Granted
Interlayer and laminate with controlled debonding zone treatments
AssigneeKuraray Europe GmbH
InventorsCharles Anthony Smith, Stephen John Bennison
Life of this patent
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Abstract
An ionomer-based adhesive polymeric interlayer (API) that provides enhanced properties to rigid substrates through the use of polyvinyl acetal-based controlled debonding zone treatments, and rigid substrate-laminates comprising such interlayers.
Claims13
An adhesive polymeric interlayer (API), comprising:
- a first and a second API surface;
- a sheet of a first polymeric material having a first and a second surface, wherein the first polymeric material is an ionomer;
- a first treatment in a discreet treatment zone geometry on the first surface of the first polymeric material to create a first treatment-first polymeric material interface;
- a first discrete zone on the first API surface with a maximum mean peel adhesion;
- and
- a second discrete zone on the first API surface with a minimum mean peel adhesion greater than about 0.01 kJ/m2;
- and
- wherein the maximum mean peel adhesion is at least about 2 times greater than the minimum mean peel adhesion;
- wherein:
- the first treatment is a polyvinyl acetal;
- and
- when the first API surface is laminated to glass to create a glass-API interface, the resulting glass laminate meets one of the following two conditions:
- G
- T
- -
- PI
- ≤
- G
- glass
- -
- 2
-
- D
- <
- G
- 1
-
- D
- -
- glass
- ≤
- G
- 0
- -
- T
- ≤
- G
- 0
- -
- PI
- ,
- (
- I
- )
- wherein:
- GT-PI=adhesive strength of the first treatment-first polymeric material interface,
- Gglass-2D=adhesive strength of the glass-second discreet zone interface,
- G1D-glass=adhesive strength of the first discreet zone-glass interface,
- G0-T=cohesive strength of the first treatment, and
- G0-PI=cohesive strength of the first polymeric material,
- such that, on debonding of the glass and API, the separation of the glass and API predominantly comprises a mixture of glass-second discreet zone adhesive fracture and first polymeric material-first treatment adhesive fracture;
- or
- G
- 0
- -
- T
- ≤
- G
- g
-
- l
-
- a
-
- s
-
- s
- -
- P
-
- I
- <
- G
- T
- -
- P
-
- I
- ≤
- G
- T
- -
- g
-
- l
-
- a
-
- s
-
- s
- <
- G
- 0
- -
- P
-
- I
- (
- II
- )
- wherein:
- G0-T=cohesive strength of the first treatment,
- Gglass-PI=adhesive strength of the glass-first polymeric material interface,
- GT-PI=adhesive strength of the first treatment-first polymeric material interface,
- GT-glass=adhesive strength of the first treatment-glass interface, and
- G0-PI=cohesive strength of the first polymeric material,
- such that, on debonding of the glass and API, the separation of the glass and API predominantly comprises a mixture of first treatment cohesive fracture and glass-first polymeric material adhesive fracture.
105 more elements
A glass laminate comprising:
- (i) a first glass substrate having a first and second glass surface;
- and
- (ii) an adhesive polymeric interlayer (API) comprising a first and a second API surface;
- wherein:
- the second glass surface is adhered to the first API surface to create a glass/API interface;
- the API comprises a sheet of a first polymeric material having a first and a second surface, wherein the first polymeric material is an ionomer;
- a first treatment in a discreet treatment zone geometry on one or both of the first surface of the first polymeric material and second surface of the glass substrate, to create a first treatment-first polymeric material interface;
- a first discrete zone at the glass/API interface with a maximum mean peel adhesion;
- and
- a second discrete zone at the glass/API interface with a minimum mean peel adhesion greater than about 0.01 kJ/m2;
- wherein the maximum mean peel adhesion is at least about 2 times greater than the minimum mean peel adhesion;
- wherein:
- the first treatment is a polyvinyl acetal;
- and
- the glass laminate meets one of the following two conditions:
- G
- T
- -
- PI
- ≤
- G
- glass
- -
- 2
-
- D
- <
- G
- 1
-
- D
- -
- glass
- ≤
- G
- 0
- -
- T
- ≤
- G
- 0
- -
- PI
- ,
- (
- I
- )
- wherein:
- GT-PI=adhesive strength of the first treatment-first polymeric material interface,
- Gglass-2D=adhesive strength of the glass-second discreet zone interface,
- G1D-glass=adhesive strength of the first discreet zone-glass interface,
- G0-T=cohesive strength of the first treatment, and
- G0-PI=cohesive strength of the first polymeric material,
- such that, on debonding of the glass and API, the separation of the glass and API predominantly comprises a mixture of glass-second discreet zone adhesive fracture and first polymeric material-first treatment adhesive fracture;
- or
- G
- 0
- -
- T
- ≤
- G
- g
-
- l
-
- a
-
- s
-
- s
- -
- P
-
- I
- <
- G
- T
- -
- P
-
- I
- ≤
- G
- T
- -
- g
-
- l
-
- a
-
- s
-
- s
- <
- G
- 0
- -
- P
-
- I
- (
- II
- )
- wherein:
- G0-T=cohesive strength of the first treatment,
- Gglass-PI=adhesive strength of the glass-first polymeric material interface,
- GT-PI=adhesive strength of the first treatment-first polymeric material interface,
- GT-glass=adhesive strength of the first treatment-glass interface, and
- G0-PI=cohesive strength of the first polymeric material,
- such that, on debonding of the glass and API, the separation of the glass and API predominantly comprises a mixture of first treatment cohesive fracture and glass-first polymeric material adhesive fracture.
108 more elements
Dependencies are inferred from the claim text.