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US 12,534,642 B2Granted
Composition for structural adhesives
AssigneeJacret
InventorRégis David
Life of this patent
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Abstract
The invention relates to an acrylic structural adhesive composition containing (meth)acrylate monomers at least 20% of which is a mixture of 1,3-Dioxan-5-yl methacrylate and 1,3-Dioxolan-4-ylmethyl methacrylate, as well as block copolymers, elastomers and particles formed of a thermoplastic shell and an elastomeric core.
Claims23
A composition that can be used in a structural adhesive, the composition comprising by weight:
- (a) between 35% and 60% of (meth)acrylate monomers, including
- (i) at least 20% of a monomer of formula (I), a monomer of formula (II), or a mixture thereof
- wherein R, R1, and R2 are independently H or CH3, and
- (ii) at least 5% of one or more other (meth)acrylate monomer(s) selected from the group consisting of isobornyl methacrylate, 2-ethylhexyl methacrylate, 2-ethylhexyl acrylate and 2-hydroxyethyl methacrylate,
- (b) between 15 to 30% of particles formed from a thermoplastic shell and an elastomeric core, wherein the particles are chosen from acrylonitrile-butadiene-styrene, methacrylate-butadiene-styrene, methacrylate-acrylonitrile-butadiene-styrene, methacrylate-acrylonitrile particles, and mixtures thereof,
- (c) between 9 and 15% of an elastomeric block copolymer comprising styrene and at least one second monomer, or a mixture of such block copolymers, and
- (d) between 5 and 25% of an elastomer selected from the group consisting of non-functionalized polybutadiene, polybutadiene functionalized by carboxyl ends, polybutadiene functionalized by vinyl ends, methacrylated polybutadiene, and mixtures thereof;
- wherein the sum of components (b), (c), and (d) is at least 35%.
5 more elements
Dependencies are inferred from the claim text.