US 12,350,923 B2
Interlayer and laminate with controlled debonding zone treatments
Charles Anthony Smith, Vienna, WV (US); and Stephen John Bennison, Wilmington, DE (US)
Assigned to Kuraray Europe GmbH, Hattersheim (DE)
Appl. No. 18/712,302
Filed by KURARAY EUROPE GMBH, Hattersheim (DE)
PCT Filed Nov. 22, 2022, PCT No. PCT/US2022/050661
§ 371(c)(1), (2) Date May 22, 2024,
PCT Pub. No. WO2023/096879, PCT Pub. Date Jun. 1, 2023.
Claims priority of provisional application 63/282,326, filed on Nov. 23, 2021.
Claims priority of provisional application 63/282,315, filed on Nov. 23, 2021.
Prior Publication US 2025/0018683 A1, Jan. 16, 2025
Int. Cl. B32B 7/12 (2006.01); B32B 3/26 (2006.01); B32B 7/06 (2019.01); B32B 7/14 (2006.01); B32B 17/10 (2006.01)
CPC B32B 7/14 (2013.01) [B32B 3/266 (2013.01); B32B 7/06 (2013.01); B32B 17/10036 (2013.01); B32B 17/10688 (2013.01); B32B 17/10761 (2013.01); B32B 17/10935 (2013.01); B32B 17/10981 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2255/10 (2013.01); B32B 2260/046 (2013.01); B32B 2307/412 (2013.01); B32B 2307/748 (2013.01); B32B 2315/085 (2013.01); B32B 2329/06 (2013.01); B32B 2333/00 (2013.01)] 13 Claims
OG exemplary drawing
 
1. 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:

OG Complex Work Unit Math
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

OG Complex Work Unit Math
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.