Toughened cyanoacrylates containing elastomeric rubbers
First Claim
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1. A curable adhesive comprising a substantially solvent-free mixture of:
- (a) a monomeric ester of 2-cyanoacrylic acid, and(b) about 0.5% to about 20% by weight of an elastomeric polymer selected from the group consisting of elastomeric copolymers of a lower alkene monomer and (i) acrylic acid esters (ii) methacrylic acid esters or (iii) vinyl acetate.
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Abstract
Disclosed are cyanoacrylate adhesive compositions containing elastomeric polymers as fillers. Preferred fillers are the acrylic rubbers. Filler concentration range from about 0.5-40% by weight of the composition. Beneficial results include improved toughness of the cured compositions, as measured by impact, peel and tensile strength properties, particularly after exposure elevated temperatures which would ordinarily severely degrade the adhesive strength.
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8 Claims
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1. A curable adhesive comprising a substantially solvent-free mixture of:
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(a) a monomeric ester of 2-cyanoacrylic acid, and (b) about 0.5% to about 20% by weight of an elastomeric polymer selected from the group consisting of elastomeric copolymers of a lower alkene monomer and (i) acrylic acid esters (ii) methacrylic acid esters or (iii) vinyl acetate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification