申请人:MATSUMOTO YUSHI-SEIYAKU CO., LTD.
公开号:US20180056267A1
公开(公告)日:2018-03-01
Heat-expandable microspheres having an expansion temperature which can be decreased by a simple means without changing the polymerizable monomer and its ratio and/or changing the blowing agent and its ratio, and applications thereof. The heat-expandable microspheres are composed of a thermoplastic resin shell and a core material encapsulated therein. The core material contains a thermally-vaporizable blowing agent which imparts a swelling degree of less than 5% as defined by the following formula (I) and a component (A) which imparts a swelling degree of 5 to 30% as defined by the following formula (I), wherein an amount of the component (A) ranges from 0.0001 to 30 parts by weight to 100 parts by weight of the blowing agent:
Swelling degree (%)=(
M
2
−M
1
)/
M
1
}×100 (I)
wherein M
2
and M
1
are as defined herein.