The invention discloses non-yellowing
polyurethane memory cotton and a preparation method thereof. The non-yellowing
polyurethane memory cotton is prepared from the following raw materials in parts byweight: 50-80 parts of
high activity polyether polyols, 5-40 parts of slow rebound polyether, 2-35 parts of
polymer polyols, 1-10 parts of chain
extender, 0.2-3 parts of foam stabilizer, 0.5-3 partsof composite catalyst, 1-4 parts of water and 30-60 parts of aliphatic series
isocyanate. The non-yellowing
polyurethane memory cotton is composed of selected raw materials, the content of each
raw material is optimized, the
high activity polyether polyols, the slow rebound polyether, the
polymer polyols, the chain
extender, the foam stabilizer, the composite catalyst, the water and the aliphaticseries
isocyanate are selected with proper proportions, respective advantages are given full play, mutual
complementation and improvement are achieved, the quality stability of products is improved, the prepared non-yellowing polyurethane memory cotton is high in color fastness to light, good in phemol yellowing resistance, high in
smoke resistance, long in slow rebound
recovery time and low in falling sphere rebound rate.