公开(公告)号：US11945977B2

公开(公告)日：2024-04-02

申请号：US16486880

申请日：2018-02-20

Applicant: BOSTIK, INC.

Inventor： Steven D. Gray ,  Darius K. Deak ,  Brian R. Minix ,  Edward P. Tomlinson

IPC: C09J153/02 ,  C08K3/34 ,  C08K3/36 ,  C08K5/00 ,  C08L25/06 ,  C09J11/06 ,  C09J125/06

CPC classification number: C09J153/02 ,  C08L25/06 ,  C09J11/06 ,  C08K3/346 ,  C08K3/36 ,  C08K5/0083 ,  C08L2666/06 ,  C09J125/06

Abstract: A hot melt adhesive comprises at least one polymer selected from the group consisting of polystyrene, polybutene, polyisobutene, linear low density polyethylene, polypropylene random copolymer, polypropylene, olefin block copolymer, polyolefins, styrene block copolymers, and ethyl vinyl acetate polymers; a tackifying resin; and at least one precisely end-capped polystyrene (PECPS). The use of the styrene-based oligomers and polymers with the precisely controlled end-groups in hot melt adhesive formulations to improve compatibility with polymers and block copolymers frequently used in such adhesives.

公开(公告)号：US20220325145A1

公开(公告)日：2022-10-13

申请号：US17641470

申请日：2020-07-30

Applicant: Bostik, Inc.

Inventor： Brian R. Minix ,  Steven D. Gray ,  Miao Hu ,  Kimberly E. Secrist

IPC: C09J123/12 ,  C09J7/35 ,  C09J7/24

Abstract: A hot melt adhesive uses a blend of polymers having controlled stereoerror and comprises a stereoblock polypropylene comprising a first block having an isotactic index of between about 50% and about 95% and a second block having an isotactic index of between about 5% and 50%, wherein the difference between the isotactic indeces of the first block and the second block is at least about 10%. The hot melt adhesive exhibits improved peel and tack properties without compromising shear strength and vice versa.