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US 5,859,088 AGranted
Radiation-curable poly(.alpha.-olefin) adhesives
AssigneeMinnesota Mining and Manufacturing Company
InventorsJames Richard Peterson, Gaddam Nana Babu, Eric Ryan Bennett
Life of this patent
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Abstract
The invention relates to adhesive compositions comprising polymers comprising C.sub.6 to C.sub.12 saturated .alpha.-olefin monomers and C.sub.2 to C.sub.5 .alpha.-olefin monomers and an effective amount of photoactive crosslinking agent to crosslink composition upon radiation from a source of actinic radiation.
Claims28
A composition comprising:
- a) a saturated .alpha.-olefin polymer comprising
- 1) the polymerization product of from about 70 to about 99 mole percent of one or more C.sub.6 to C.sub.12 .alpha.-olefin monomers, and
- 2) from about 1.0 to about 30 mole percent of one or more C.sub.2 to C.sub.5 .alpha.-olefin monomers, with the proviso that the polymer is derived from C.sub.6 to C.sub.12 and C.sub.2 to C.sub.5 .alpha.-olefin monomers that do not contain pendent methylidyne groups;
- b) an effective amount of a photoactive crosslinking agent to crosslink the composition upon irradiation from a source of actinic radiation;
- and
- c) from 0 to about 150 parts, per 100 parts polymer, of a tackitying resin, said composition being a pressure sensitive adhesive both before and after cross-linking, said composition prior to crosslinking having an inherent viscosity in the range of 1.3 to 2.0 dL/g when a 0.5 g/dL solution of the composition in toluene is measured at 25.degree. C.
3 more elements
A method of preparing a radiation curable adhesive composition comprising the steps of:
- a) polymerizing an admixture comprising
- i) one or more C.sub.6 -C.sub.12 .alpha.-olefin monomers and one or more C.sub.2 -C.sub.5 .alpha.-olefin monomers;
- and
- ii ii) an effective amount of a photoactive cross-linking agent;
- and
- b) subjecting the admixture to radiation to provide a cross-linked polymer wherein said cross-linked polymer comprises about 70-99 mole percent of C.sub.6 -C.sub.12 .alpha.-olefin repeat units and about 1-30 mole percent of C.sub.2 -C.sub.5 .alpha.-olefin repeat units;
- with the proviso that the polymer is derived from .alpha.-olefin monomers that do not contain pendent methylidyne groups.
4 more elements
A composition comprising:
- a) a saturated .alpha.-olefin polymer derived from:
- 1) about 70 to about 99 mole percent of one or more monomers selected from the group consisting of 1-hexene, 1-octene, and 1-decene, and
- 2) about 1.0 to about 30 mole percent of one or more monomers selected from the group consisting of ethylene and propylene;
- b) an effective amount of a photoactive crosslinking agent to crosslink the composition upon irradiation from a source of actinic radiation;
- and
- c) from 0 to about 150 parts, per 100 parts polymer, of a tackifying resin, said composition being a pressure sensitive adhesive both before and after cross-linking, and said composition prior to crosslinking having an inherent viscosity in the range of 1.3 to 2.0 dL/g when a 0.5 g/dL solution of the composition in toluene is measured at 25.degree. C.
3 more elements
A composition comprising:
- (a) a saturated .alpha.-olefin polymer having the general formula:
- (M.sup.1).sub.x -(M.sup.2).sub.y I
- wherein:
- x and y are numbers designating the relative molar amounts of M.sup.1 and M.sup.2 that are randomly located in the backbone chain of the polymer such that the polymer has a weight average molecular weight of at least 250,000, x is from about 70 to about 99 mole percent of the sum (x+y) and y is from about 1 to about 30 mole percent of the sum (x+y);
- M.sup.1 is an ethanediyl repeat unit having a pendent hydrocarbyl group containing 4 to 10 carbon atoms;
- and
- M.sup.2 is different from M.sup.1 and is an ethanediyl repeat unit selected from ethylene or units having a pendent hydrocarbyl group selected from linear alkyl groups having 1-3 carbon atoms;
- (b) an effective amount of a photoactive crosslinking agent to crosslink the composition upon irradiation from a source of actinic radiation;
- and
- (c) from 0 to about 150 parts per 100 parts polymer of a tackifying resin, said composition being a pressure sensitive adhesive both before and after cross-linking, and said composition prior to crosslinking having an inherent viscosity in the range of 1.3 to 2.0 dL/g when a 0.5 g/dL solution of the composition in toluene is measured at 25.degree. C.
7 more elements
Dependencies are inferred from the claim text.