| 摘要 |
An expandable polyurethane composition includes (A) polyisocyanate, (B) active hydrogen containing compound including (B1) polyol and (B2) water, catalysts, and (C) cross-linking agent composition. The (C) cross-linking agent composition includes at least one kind of (C1) cross-linking agent selected from (CA) ethoxylate derivative having MW of 2000 or less and (CB) ester compound having MW of 2500 or less, and (C2) non-protic polar solvent, and a mass ratio ((a+b)/c) of a sum of content a of the (CA) ethoxylate derivative and content b of the (CB) ester compound relative to content c of the (C2) non-protic polar solvent is 1/10 to 10/1. A flexible polyurethane foam can be obtained of which wet set is improved and feeling is good. |
| 主权项 |
1. An expandable polyurethane composition, comprising:
(A) polyisocyanate; (B) active hydrogen containing compound including (B1) polyol and (B2) water; catalysts; and (C) cross-linking agent composition of 0.1 to 20 parts by mass relative to 100 parts by mass of the (B1) polyol, wherein the (C) cross-linking agent composition comprises at least one kind of (C1) cross-linking agent selected from (CA) ethoxylate derivative and (CB) ester compound, and (C2) non-protic polar solvent, the (CA) ethoxylate derivative having a mass average molecular weight of 2000 or less represented by
HO(CH2CH2O)mH formula (1): (in the formula (1), m is an integer of 3 to 30) or
R1—[(CH2CH2O)nH]x formula (2): (in the formula (2), R1 represents a group selected from a glycerol group, a trimethylol group, a pentaerythritol group, and a diglycerol group, n is an integer of 1 to 15, and x is 3 or 4); and the (CB) ester compound having a mass average molecular weight of 2500 or less represented by
H(OR2OCOR3CO)y—OR2OH, or formula (3):R4—[(OCOR3CO—OR2)y—OH]3 formula (4): (in the formula (3) and formula (4), R2 represents an alkyl group of which carbon number is 2 to 10, R3 represents an alkyl group of which carbon number is 1 to 15, and y is an integer of 1 to 14, and in the formula (4), R4 represents an alkyl group of which carbon number is 1 to 15), and wherein, in the (C) cross-linking agent composition, a mass ratio ((a+b)/c) of a sum of content (a) of the (CA) ethoxylate derivative and content (b) of the (CB) ester compound relative to content (c) of the (C2) non-protic polar solvent is 1/10 to 10/1. |
