Patent ID: 11939456
Assignee: TSRC CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 0:
1. A composition for preparing a foam, comprising:
10-30 parts by weight of a copolymer of a norbornene-based monomer and an olefin-based monomer, wherein the norbornene-based monomer is norbornene, ethylidene norbornene, dicyclopentadiene, methano tetrahydrofluorene, tetracyclododecene, or a combination thereof;
about 39 to 50 parts by weight of an ethylene-vinyl acetate copolymer;
27-35 parts by weight of an ethylene-1-octene copolymer;
3-5 parts by weight of a conjugated diene-vinyl aromatic copolymer which is a styrene-butadiene-styrene (SBS) block copolymer, a styrene-isoprene-styrene (SIS) block copolymer, a styrene-(isoprene/butadiene)-styrene (S-(I/B)-S) block copolymer, a styrene-ethylene-butylene-styrene (SEBS) block copolymer, or a combination thereof, or a partially hydrogenated conjugated diene-vinyl aromatic copolymer which is a partially hydrogenated styrene-butadiene-styrene (SBS) block copolymer, a partially hydrogenated styrene-isoprene-styrene (SIS) block copolymer, a partially hydrogenated styrene-(isoprene/butadiene)-styrene (S-(I/B)-S) block copolymer, a partially hydrogenated styrene-ethylene-butylene-styrene (SEBS) block copolymer, or a combination thereof, wherein the partially hydrogenated conjugated diene-vinyl aromatic copolymer has a proportion of its non-aromatic double bonds converted into single bonds which is greater than or equal to 70%;
0.1-10 parts by weight of a cross-linking agent; and
0.1-25 parts by weight of a blowing agent;
wherein a ratio of a compression set to a specific gravity of a foam produced from the composition is between 449 and 180; and
wherein a ratio of a split tear strength to the specific gravity of the foam produced from the composition is between 13.8 and 18.