Dianhydrohexitol tackifying agent and hot melt adhesive compositions including the same
OwnerThomas F. Kauffman, Kevin P. Davis +4inventors
InventorsThomas F. Kauffman, Kevin P. Davis, Adam M. Pederson, Zhiyong Gan, Allen Yang, Dan Su
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Abstract
Disclosed is a dianhydrohexitol tackifying agent and a hot melt adhesive composition including the same. The dianhydrohexitol tackifying agent includes the reaction product of dianhydrohexitol, a diacid component, optionally a difunctional reactant, and optionally a monofunctional end capping agent, the dianhydrohexitol tackifying agent exhibiting a glass transition temperature of from 0° C. to 120° C., or even from 30° C. to 100° C., a weight average molecular weight of no greater than 6000, and an acid number no greater than 50 mg KOH/g.
Claims21
A hot melt adhesive composition comprising:
- from 3% by weight to 90% by weight polymer;
- and
- from 10% by weight to 80% by weight of a dianhydrohexitol tackifying agent comprising the reaction product of
- dianhydrohexitol,
- a diacid component selected from the group consisting of dicarboxylic acid, cyclic anhydride, and combinations thereof,
- optionally a difunctional reactant selected from the group consisting of cyclic ester, hydroxy acid, and combinations thereof, when the difunctional reactant is present, the dianhydrohexitol tackifying agent has a molar ratio of dianhydrohexitol to difunctional reactant of greater than one, and
- optionally a monofunctional end capping agent,
- the dianhydrohexitol tackifying agent exhibiting a glass transition temperature (Tg) of from 30° C. to 100° C., a weight average molecular weight of no greater than 6000, and an acid number no greater than 50 mg KOH/g.
A thermoplastic polymer composition comprising:
- from 50% by weight to 99% by weight of a polymer selected from the group consisting of polylactic acid, polyglycolide, polyhydroxyalkanoate, polyurethane, poly(butylene adipate terephthalate), poly(butylene succinate), polycaprolactone, ethylene-polar comonomer copolymer, polyester-polyether copolymer, acrylate, methacrylate, and combinations thereof, and
- from 1% by weight to 50% by weight dianhydrohexitol additive, the dianhydrohexitol additive having a weight average molecular weight of no greater than 6000 g/mole, and a glass transition temperature of from 30° C. to 100° C., and
- the dianhydrohexitol additive comprising the reaction product of dianhydrohexitol, a diacid component selected from the group consisting of dicarboxylic acid, cyclic anhydride, and combinations thereof, optionally a difunctional reactant selected from the group consisting of cyclic ester, hydroxy acid, and combinations thereof, and optionally a monofunctional end capping agent,
- the dianhydrohexitol additive having
- an acid number no greater than 50 mg KOH/g, and,
- when the difunctional reactant is present, a molar ratio of dianhydrohexitol to the difunctional reactant of greater than 1.
A dianhydrohexitol tackifying agent comprising:
- the reaction product of
- dianhydrohexitol,
- a diacid component selected from the group consisting of dicarboxylic acid, cyclic anhydride, and combinations thereof,
- a difunctional reactant selected from the group consisting of cyclic ester, hydroxy acid, and combinations thereof, and
- optionally a monofunctional end capping agent,
- the dianhydrohexitol tackifying agent
- comprising at least 20% by weight dianhydrohexitol,
- having a molar ratio of dianhydrohexitol to difunctional reactant of greater than one, and
- exhibiting a glass transition temperature (Tg) of from 0° C. to 120° C., a weight average molecular weight of no greater than 6000, and an acid number of no greater than 50 mg KOH/g.
Dependencies are inferred from the claim text.