Patent ID: 11866619
Assignee: LUMINA ADHESIVES AB
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 1:
2. A switchable adhesive composition as claimed in claim 1, wherein the curable molecules are oligomers of at least one of the following formulae (I) to (V):

CA(BA)nC  (I)

where n is 0, 1, 2, 3 or 4,
A is a diisocyanate, a diepoxide, a diol or a dicarboxylic acid;
B is a diol when A is a diisocyanate or a dicarboxylic acid; B is a dicarboxylic acid when
A is a diepoxide or a diol;
C is a hydroxyl containing acrylate ester when A is a diisocyanate or a dicarboxylic acid; C is an acrylic acid when A is a diepoxide or a diol;

C2E(BCE)nC2  (II)

where n is 0, 1, 2, 3 or 4,
E is a tri-isocyanate, a triepoxide, a triol or a tricarboxylic acid;
B is a diol when E is a tri-isocyanate or a tricarboxylic acid; B is a dicarboxylic acid when E is a triepoxide or a triol;
C is a hydroxyl containing acrylate ester when E is a tri-isocyanate or a tricarboxylic acid; C is an acrylic acid when E is a triepoxide or a triol;

E(2n+1)FnC(3n+3)(III)

where n is 0, 1, 2, 3 or 4,
E is a tri-isocyanate, a triepoxide, a triol or a tricarboxylic acid;
F is a triol when E is a tri-isocyanate or a tricarboxylic acid; F is a tricarboxylic acid when E is a triepoxide or a triol;
C is a hydroxyl containing acrylate ester when E is a tri-isocyanate or a tricarboxylic acid; C is an acrylic acid when E is a triepoxide or a triol;

G(n+1)BnC(2n+4)  (IV)

where n is 0, 1, 2, 3 or 4,
G is a tetra-isocyanate, a tetra-epoxide, a tetra-ol or a tetra-carboxylic acid;
B is a diol when G is a tetra-isocyanate or a tetra-carboxylic acid; B is a dicarboxylic acid when G is a tetra-epoxide or a tetra-ol;
C is a hydroxyl containing acrylate ester when G is a tetra-isocyanate or a tetra-carboxylic acid; C is a dicarboxylic acid when G is a tetra-epoxide or a tetra-ol;

DC3  (V)

where D is a symmetrical isocyanurate trimeric ring structure or an asymmetric trimeric iminooxadiazinedione ring structure consisting of three diisocyanate molecules, or a linear trimeric biuret or allophanate structure,
C is a hydroxyl containing acrylate ester;, and wherein the oligomers have a weight average molecular weight of at least 500 dalton.