The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2020
Filed:
Mar. 01, 2017
Purac Biochem Bv, Gorinchem, NL;
Chris François Hubert Schaekens, Gorinchem, NL;
Kevin Bernardus Braam, Gorinchem, NL;
Jessie Richarda Anna Verkerk, Gorinchem, NL;
PURAC BIOCHEM BV, Gorinchem, NL;
Abstract
A hot-melt adhesive includes a copolymer having first and second blocks, wherein the first block is an amorphous copolymer of lactic acid and a further polymerisable monomer and the second block is a polylactic acid polymer selected from poly-L-lactic acid (PLLA) and poly-D-lactic acid (PDLA), the first block having a number average molecular weight of at least 0.5 kg/mol and the second block having a number average molecular weight of at least 1 kg/mol. Preferably, the hot-melt adhesive also has 0.5-20 wt. %, calculated on the weight of the copolymer of a polylactic acid unit (PLAU) which has a stereochemistry which is opposite to the stereochemistry of the second block in the copolymer. The non-reactive hot-melt adhesive combines a good adhesive performance with storage stability resulting from a low cold-flow. Further, the adhesive is at least partially based on polymers which can be prepared from renewable resources.