Stock material or miscellaneous articles – Composite – Of polyester
Patent
1993-06-28
1995-05-02
Thibodeau, Paul J.
Stock material or miscellaneous articles
Composite
Of polyester
428458, 525438, 525444, B32B 1506, B32B 2706, B32B 2736, C08F 2210
Patent
active
054118107
ABSTRACT:
The present invention relates to a viscoelastic resin composition for a vibration damping material and a vibration damping material using the same. The viscoelastic resin composition includes as its main components: Low Tg resin (A) with a glass transition temperature of -60.degree. C. to 0.degree. C. and a number average molecular weight of 5000 to 50000, the Low Tg resin (A) being a polyester containing an acid component having 50 to 90 mol % of aromatic dicarboxylic acid and 10 to 50 mol % of dimer acid, and a glycol component having at least 30 mol % of glycol with an alkyl group as its side chain and the glycol having at least four carbon atoms; and High Tg resin (B) which is at least one selected from the group consisting of amorphous polyester resins, phenoxy resins, and epoxy resins, the epoxy resins having a number average molecular weight of at least 1000, the respective resins having a glass transition temperature in the range of 0.degree. C. to 80.degree. C.; wherein the weight ratio between the Low Tg resin (A) and the High Tg resin (B) is in the range of 90:10 to 30:70. This viscoelastic resin composition is used for a resin layer of an attachable vibration damping material and a sandwich type vibration damping material.
REFERENCES:
patent: 4447493 (1984-05-01), Driscoll et al.
patent: 4859523 (1989-08-01), Entoh et al.
patent: 4942219 (1990-07-01), Yatsuka et al.
patent: 5183863 (1993-02-01), Nakamura et al.
Hirakouchi Hiroshi
Kadowaki Nobuo
Nakamura Masanori
Yatsuka Takeshi
Chen Vivian
Thibodeau Paul J.
Toyo Boseki Kabushiki Kaisha
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