Viscoelastic sound-absorbing polyurethane foam and preparation method thereof

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United States of America Patent

PATENT NO 9790314
SERIAL NO

14441710

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Abstract

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The present invention discloses a viscoelastic sound-absorbing polyurethane foam and a method for preparing the same, the foam being prepared by reacting a polyisocyanate composition and an isocyanate reactive component. The isocyanate reactive component comprises, based on the weight of mixed polyethers, 30-80 wt % of (bii) a copolyol of epoxypropane-epoxyethane, or a conjugate thereof, wherein the content of oxy-ethylidene unit is 5-35 wt %; 2-20 wt % of (biii) a copolyol of epoxypropane-epoxyethane, or a conjugate thereof, wherein the content of oxy-ethylidene unit is 70-100 wt %; and 20-70 wt % of (biv) a copolyol of epoxypropane-epoxyethane, or a conjugate thereof, wherein the content of oxy-ethylidene unit is 0-20 wt %. The sound-absorbing foam of the present invention has a ball rebound rate of 15-30% and good sound absorption performance.

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Patent Owner(s)

Patent OwnerAddress
WANHUA CHEMICAL (NINGBO) CO LTDWANHUA INDUSTRIAL GARDEN HUANDAO NORTH ROAD DAXIE ECONOMIC DEVLOPMENT ZONE NINGBO ZHEJIANG 315812
WANHUA CHEMICAL GROUP CO LTDSHANDONG
WANHUA CHEMICAL (BEIJING) CO LTDNO 5 STAR FIRE STREET BEIJING CHANGPING DISTRICT SCIENCE AND TECHNOLOGY PARK BEIJING BEIJING CITY BEIJING CITY 102200

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Shen, Chen Beijing, CN 63 82
Wei, Peng Beijing, CN 65 163
Zhao, Jun Beijing, CN 550 12849
Zhao, Yi Beijing, CN 234 2740

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