Patent ID: 11939493
Assignee: BOSTIK SA
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 16:
17. The two-part curable composition according to claim 1, selected from the following compositions:
1) a two-part curable composition comprising:
a first part (component A) comprising:
at least 70% by weight, based on the total weight of the first part, of one or more cyanoacrylate monomer(s);
from 0% to 5% of thixotropic agent;
from 0% to 5% of a thickening agent;
from 0.001% to 0.2% of stabilizing agent(s);
from 0.01% to 1% by weight of antioxidant(s);
from 0.001% to 1% by weight of transition metal complex(s);

a second part (component B) comprising:
at least 40% by weight of at least one Michael acceptor M selected from the group consisting of (meth)acrylic monomers, (meth)acrylic functionalized oligomers, (meth)acrylic functionalized resins, and mixtures thereof,
from 0.1% to 20% by weight of per compound(s) based on the total weight of the second part;
from 0% to 5% of thixotropic agent(s);
from 0%-0.05% of an acid scavenger compound AS selected from sterically hindered bases;

wherein the Michael acceptor comprises a radical -EWG1-CH2-EWG2- wherein EWG2 and EWG1 are each, independently of each other, an electron withdrawing group, and the first part is deprived of a per-compound;

2) a two-part curable composition comprising:
a first part (component A) comprising:
at least 70% by weight, based on the total weight of the first part, of one or more cyanoacrylate monomer(s);
from 0% to 5% of thixotropic agent;
from 0% to 5% of a thickening agent;
from 0.001% to 0.2% of stabilizing agent(s);
from 0.01% to 1% by weight of antioxidant(s);
from 0.001% to 1% by weight of transition metal complex(es); and
from 1% to 30% by weight of a compound C comprising a radical -EWG1-CH2-EWG2- wherein EWG2 and EWG1 are each, independently of each other, an electron withdrawing group; and

wherein the first part is deprived of a per-compound;
a second part (component B) comprising:
at least 40% by weight of at least one Michael acceptor M selected from the group consisting of (meth)acrylic monomers, (meth)acrylic functionalized oligomers, (meth)acrylic functionalized resins, and mixtures thereof,
from 0.1% to 20% by weight of per compound(s) based on the total weight of the second part;
from 0% to 5% of thixotropic agent(s), and
from 0% to 0.05% of an acid scavenger compound AS selected from sterically hindered bases.