Method for producing polylactic acid-based hot melt adhesive

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United States of America Patent

PATENT NO 11802225
APP PUB NO 20210009873A1
SERIAL NO

17042126

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Abstract

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A method for manufacturing a polylactic acid-based hot melt adhesive includes: (1) preparing a first polylactic acid composition by adding a phosphite and a hindered phenol to a mixture prepared by adding and melt-mixing a first polylactic acid (relative viscosity 2.5-4.0) in a liquid mixture of a dithiocarbamate and a plasticizer at 180 to 280° C., wherein with respect to 100 parts by weight of the first polylactic acid, 10 to 100 parts by weight of the plasticizer, 0.02 to 0.3 parts by weight of the dithiocarbamate, 1 to 10 parts by weight of the phosphite, and 1 to 10 parts by weight of the hindered phenol are used; and (2) mixing a second polylactic acid (relative viscosity 2.5-4.0), into the first polylactic acid composition at 180-280° C., a weight ratio of the first polylactic acid/the second polylactic acid is 2/8 to 8/2.

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Patent Owner(s)

  • BP CONSULTING, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harada, Koutarou Tokyo, JP 1 0
Yamamatsu, Takeyuki Tokyo, JP 3 1
Yamamatsu, Toshiaki Tokyo, JP 1 0

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