Reaction product of propylene polymer and wax, graft copolymers derived from polypropylene polymer and wax, hot melt adhesive compositions including the same, and methods of using and making the same

A hot melt adhesive composition comprising:

• a reaction product of components comprising
• a first polymer comprising polypropylene homopolymer, polypropylene-alpha-olefin copolymer, or a combination thereof,
• a first wax comprising polyethylene wax, Fischer Tropsch wax, or a combination thereof, and
• a free radical initiator,
• the reaction product having a viscosity at 177° C. that is less than the viscosity of a blend of the components of the reaction product other than the free radical initiator;
• and
• tackifying agent
• the reaction product having a number average molecular weight greater than 5000 g/mole, a polydispersity index of no greater than 5, and a viscosity of no greater than 12,000 centipoise at 177° C.

A hot melt adhesive composition comprising:

• a reaction product of
• a first polymer comprising polypropylene homopolymer, polypropylene-alpha-olefin copolymer, or a combination thereof,
• a first non-functionalized wax comprising polyethylene wax, Fischer Tropsch wax, paraffin wax, or a combination thereof, and
• a free radical initiator,
• the reaction product exhibiting a viscosity of no greater than 12,000 centipoise at 177° C.;
• and
• a tackifying agent,
• the hot melt adhesive composition exhibiting an energy to break of at least 0.15 Joules, a tensile strength of at least 3.28 MPa, a heat stress resistance of at least 65° C., or a combination thereof.

A hot melt adhesive composition comprising:

• the reaction product of components comprising
• a first polymer having a polydispersity index of no greater than 5 and comprising polypropylene homopolymer, polypropylene-alpha-olefin copolymer, or a combination thereof,
• a first wax comprising polyethylene wax, Fischer Tropsch wax, paraffin wax, or a combination thereof,
• a free radical initiator, and
• being free of an unsaturated compound comprising at least one functional group and having a molecular weight no greater than 1000 g/mole,
• the reaction product exhibiting a viscosity of no greater than 12,000 centipoise at 177° C.;
• and
• a tackifying agent.

A hot melt adhesive composition comprising:

• the reaction product of
• a first polymer comprising polypropylene homopolymer, polypropylene-alpha-olefin copolymer, or a combination thereof,
• a first wax comprising polyethylene wax, and
• a free radical initiator,
• the reaction product having a number average molecular weight greater than 5000 g/mole, a polydispersity index no greater than 5, and a viscosity of no greater than 12,000 centipoise at 177° C.;
• and
• a tackifying agent.