Hot melt adhesive composition and use thereof
The invention is related to fast setting, bio-based hot melt adhesive compositions and use thereof. The bio-based hot melt adhesive compositions are based on renewable-based feedstock, making them environmentally friendly, and particularly suitable for sealing cardboard case, carton, and cardboards.
1. A hot melt adhesive composition:
a) a mixture of bio-based polymer;
b) a poly-D-lactic acid block-based bio-nucleator;
c) an amorphous polylactic acid-based bio-tackifier; and
d) a poly-L-lactic acid block-based bio-wax;
wherein the mixture of bio-based polymer comprises a first polylactic acid-based polymer having a Mn (number average molecular weight) of about 10 to about 20 kg/mol and a second polylactic acid-based polymer having Mn of about 45 about 85 kg/mol; and
wherein the viscosity of the hot melt adhesive ranges from about 800 to about 5,000 cPs at 177° C., measured by Brookfield Viscometer (model DV1), with spindle #27 at 177° C.
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.
3. The hot melt adhesive composition of claim 2 , comprising an additive, where the additive is less than 5 wt %, based on the total weight of the adhesive.
4. The hot melt adhesive composition of claim 3 , where the additive is less than 2 wt. %, based on the total weight of the adhesive.
5. The hot melt adhesive composition of claim 4 , wherein the adhesive is essentially free of any additives.
6. The hot melt adhesive composition of claim 2 , wherein the set time of the adhesive is 3 seconds or less, measured on a Kanebo (ASM-15N) bond testing machine.
7. A hot melt adhesive composition comprising:
a) a first polylactic acid-based polymer, which is a block copolymer comprising a (i) first block of amorphous copolymer of lactic acid and caprolactone and (ii) second block of crystalline polymer of lactic acid, having a Mn (number average molecular weight) of about 10 to about 20 kg/mol;
b) a second polylactic acid based polymer, which is substantially free of caprolactone monomers, having a Mn of about 45 about 85 kg/mol
c) a poly-L-lactic acid block-based bio-nucleator;
d) an amorphous polylactic acid-based bio-tackifier; and
e) a poly-D-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.
8. The hot melt adhesive composition of claim 7 , comprising an additive, where the additive is less than 5 wt. %, based on the total weight of the adhesive.
9. The hot melt adhesive composition of claim 8 , where the additive is less than 2 wt. %, based on the total weight of the adhesive.
10. The hot melt adhesive composition of claim 9 , wherein the adhesive is essentially free of any additives.
11. The hot melt adhesive composition of claim 7 , wherein the set time of the adhesive is 3 seconds or less, measured on a Kanebo (ASM-15N) bond testing machine.
12. An article comprising the hot melt adhesive composition of claim 2 .
13. The article of claim 12 , which is a case, carton, tray, label, bookbinding, bag or disposable article.
14. An article comprising the hot melt adhesive composition of claim 7 .
15. The article of claim 14 , which is a case, carton, tray, label, bookbinding, bag or disposable article.