ADHESIVE FOR BONDING TO FLEXIBLE POLYMER SURFACES
First Claim
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1. A polymerizable adhesive composition comprising:
- (i) an organoboron compound capable of forming a free radical generating species;
(ii) an organic acid;
(iii) one or more compounds that undergo a free radical polymerization; and
(iv) a monoalkenyl arene block copolymer;
wherein the one or more compounds that undergo a free radical polymerization optionally includes methyl methacrylate at a concentration less than about 80 percent based on the total weight of the compounds that undergo a free radical polymerization;
wherein the monoalkenyl arene block copolymer is present at a concentration greater than about 3 wt percent, based on the total weight of the polymerizable adhesive composition, and the monoalkenyl arene block copolymer has one or more blocks including a monoalkenyl arene and one or more blocks including a conjugated diene; and
wherein the adhesive composition upon curing for 6 days at about 20°
C. when applied to a thermoplastic polyolefin exhibits a lap shear strength greater than about 1.8 MPa tested according to ASTM 3163 with a bondline of about 254 μ
m.
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Abstract
This invention relates to stabilized polymerizable compositions comprising compounds containing moieties capable of free radical polymerization and organoborane initiators capable of initiating free radical polymerization and adhesives based on such compositions. In another embodiment the invention relates to a method of polymerizing compounds containing moieties capable of free radical polymerization and to methods of bonding substrates (including flexible substrates) using such compositions. The invention also relates to coatings, laminates, and components including these compositions.
62 Citations
24 Claims
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1. A polymerizable adhesive composition comprising:
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(i) an organoboron compound capable of forming a free radical generating species; (ii) an organic acid; (iii) one or more compounds that undergo a free radical polymerization; and (iv) a monoalkenyl arene block copolymer; wherein the one or more compounds that undergo a free radical polymerization optionally includes methyl methacrylate at a concentration less than about 80 percent based on the total weight of the compounds that undergo a free radical polymerization; wherein the monoalkenyl arene block copolymer is present at a concentration greater than about 3 wt percent, based on the total weight of the polymerizable adhesive composition, and the monoalkenyl arene block copolymer has one or more blocks including a monoalkenyl arene and one or more blocks including a conjugated diene; and wherein the adhesive composition upon curing for 6 days at about 20°
C. when applied to a thermoplastic polyolefin exhibits a lap shear strength greater than about 1.8 MPa tested according to ASTM 3163 with a bondline of about 254 μ
m. - View Dependent Claims (2, 3, 4, 5, 8, 9, 10, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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6. (canceled)
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7. (canceled)
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11. (canceled)
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13. (canceled)
Specification