Lamination adhesive compositions and their applications

A multiple part condensation curable lamination adhesive composition, said composition comprising:

• (i) at least one condensation curable silyl terminated polymer having at least one, optionally at least 2, hydrolysable and/or hydroxyl functional group(s) per molecule;
• (ii) a cross-linker selected from the group consisting of
• silanes having at least 2 hydrolysable groups, optionally at least 3 hydrolysable groups, per molecule group;
• and/or
• silyl functional molecules having at least 2 silyl groups, each silyl group containing at least one hydrolysable group;
• and
• (iii) a condensation catalyst selected from the group consisting of titanates and zirconates;
• wherein polymer (i) is not stored in the same part as cross-linker (ii) and catalyst (iii);
• wherein condensation catalyst (iii) is present in a molar amount which is at least 50% of the moisture present cumulatively in the parts of the composition;
• wherein the molar ratio of silicon bonded hydroxyl groups in polymer (i) to hydrolysable groups in cross-linker (ii) is above 0.15;
• and
• wherein the molar ratio of the silicon bonded hydroxyl groups in polymer (i) to condensation catalyst (iii) M-OR functions is greater than 10, where M is titanium or zirconium and R is an aliphatic hydrocarbon group.