Patent ID: 11945978
Assignee: HENKEL AG & CO. KGAA
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. A hot melt adhesive composition comprising:
a) a first polylactic acid based polymer of lactic acid and caprolactone copolymer resin, having a Mn (number average molecular weight) of about 10 to about 20 kg/mol;
b) a second polylactic acid-based polymer of lactic acid, having a Mn of about 45 about 85 kg/mol;
c) a poly-D-lactic acid block-based bio-nucleator;
d) an amorphous polylactic acid-based bio-tackifier; and
e) a poly-L-lactic acid block-based bio-wax;
wherein the ratio of the first polylactic acid-based polymer the second polylactic acid-based polymer is from about 4:1 to about 10:1;
wherein the combined amount of the bio-tackifier and the bio-wax is greater than 35 wt %, based on the total weight of the adhesive;
wherein the set time of the hot melt adhesive composition is 5 seconds or less, measured on a Kanebo (ASM-15N) bond testing machine; and
wherein the viscosity of the hot melt adhesive ranges from about 800 to about 2500 cPS at 177° C., measured by Brookfield Viscometer (model DV1), with spindle #27 at 177° C.