1. A nonionic surfactant represented by the formula (1):
R\u2014O-(PO)m-(EO)n-H\u2003\u2003(1)
wherein, R represents a saturated linear-chain hydrocarbon group having 8 to 18 carbon atoms, n-octyl groups are 20 to 80% by mole of the saturated linear-chain hydrocarbon groups, n-decyl groups are 0 to 10% by mole of the saturated linear-chain hydrocarbon groups and saturated linear-chain hydrocarbon groups having 12 to 18 carbon atoms are 20 to 80% by mole of the saturated linear-chain hydrocarbon groups;
PO represents a propyleneoxy group;
EO represents an ethyleneoxy group;
m represents an average addition mole number of propyleneoxy groups ranging from 0.1 to 5;
n represents an average addition mole number of ethyleneoxy groups ranging from 0.5 to 20; and
(PO)m and (EO)n are bonded as blocks in this order.
2. (canceled)
3. The nonionic surfactant according to claim 1, wherein the content of n-octyl groups in R is 40 to 60% by mole.
4. The nonionic surfactant according to claim 1, wherein the content of n-decyl groups in R is 0 to 5% by mole.
5. The nonionic surfactant according to claim 1, wherein the saturated linear-chain hydrocarbon groups having 12 to 18 carbon atoms in R is 40 to 60% by mole.
6. The nonionic surfactant according to claim 1, wherein the saturated linear-chain hydrocarbon groups having 12 to 14 carbon atoms in R is 40 to 60% by mole.
7. The nonionic surfactant according to claim 1, wherein the average addition mole number of propyleneoxy groups, m, ranges from 1.5 to 3.5.
8. The nonionic surfactant according to claim 1, wherein the average addition mole number of ethyleneoxy groups, n, ranges from 1.5 to 12.
9. The nonionic surfactant according to claim 1, obtained by adding propylene oxide and ethylene oxide to an aliphatic alcohol corresponding to R of the formula (1) in this order.
10. A liquid detergent composition, comprising the nonionic surfactant according to claim 1 in an amount of 0.1 to 50% by mass.
11. A liquid detergent composition, comprising the nonionic surfactant according to claim 1 in an amount of 1 to 30% by mass.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An air-damping engine mount, comprising:
a main rubber body, into which a vehicle-engine center bolt is inserted and coupled;
a hollow main pipe substantially encircling the main rubber body and supporting the main rubber body;
a bellows plate coupled to one end of the main pipe and defining a damping chamber together with the main rubber body, wherein the bellows plate is displaceable according to a change in pressure in the damping chamber; and
a partition plate mounted in the damping chamber and partitioning the damping chamber into an upper chamber and a lower chamber, wherein the upper chamber is defined by the main rubber body and the partition plate, and the lower chamber is defined by the partition plate, the main rubber body, and the bellows plate, the partition plate including a through-hole such that the upper chamber fluidly communicates with the lower chamber,
wherein the through-hole is dimensioned and configured to dampen vibration of the vehicle engine by flow resistance of air passing through the a through-hole, and the bellows plate andor the partition plate are dimensioned and configured to dampen vibration by displacement thereof.
2. The air-damping engine mount according to claim 1, wherein the partition plate includes an orifice tube so as to fluidly communicate air between the upper and lower chambers flows via the through-hole and the orifice tube.
3. The air-damping engine mount according to claim 2, wherein the orifice tube is linear-shaped.
4. The air-damping engine mount according to claim 2, wherein the partition plate is displaceable.
5. The air-damping engine mount according to claim 2, wherein the orifice tube protrudes from the through-hole to the lower chamber.
6. The air-damping engine mount according to claim 5, wherein the orifice tube is inclined so as to be oriented from an outer portion of the partition plate toward a center of the lower chamber.
7. An air-damping engine mount system, comprising:
a vehicle engine, a main rubber body, into which a vehicle-engine center bolt is inserted and coupled;
a hollow main pipe substantially encircling the main rubber body and supporting the main rubber body;
a bellows plate coupled to one end of the main pipe and defining a damping chamber together with the main rubber body, wherein the bellows plate is displaceable according to a change in pressure in the damping chamber; and
a partition plate mounted in the damping chamber and partitioning the damping chamber into an upper chamber and a lower chamber, wherein the upper chamber is defined by the main rubber body and the partition plate, and the lower chamber is defined by the partition plate, the main rubber body, and the bellows plate, and the partition plate includes a through-hole such that the upper chamber fluidly communicates with the lower chamber,
wherein vibration of the vehicle engine is damped by flow resistance of air passing through the through-hole.
8. The air-damping engine mount system according to claim 7, wherein vibration of the engine is dampened by displacement of the bellows plate andor displacement of the partition plate.
9. A passenger vehicle comprising the air-damping engine mount of claim 1.
10. A passenger vehicle comprising the air-damping engine mount system of claim 7.