An expansion joint seal system with a water-activated impregnation solute, and a body of an open-celled and resiliently-compressible foam, where the volume of the water-activated impregnation solute may be combined on-site and on-demand with water and manually impregnated into the body of the foam for insertion.

The present disclosure herein discloses a preparation method of a polyurethane-based nano-silver SERS substrate, belongs to the technical field of Raman spectrums, and aims to solve problems of complex preparation process, low sensitivity and the like of SERS substrates. The method uses solidified polyurethane as a skeleton, and the polyurethane adsorbs nano silver particles onto its surface due to a porous surface structure and adsorptivity, so an SERS substrate with crystal violet as a probe molecule and having a limit of detection as low as 10.sup.−10 M is obtained. The SERS substrate prepared by the method has a large surface area, adsorbs a large number of target molecules, and is easy to prepare, high in sensitivity, and conducive to qualitative and quantitative analysis of SERS.

The invention relates to insulating composite materials comprising an inorganic aerogel and a melamine foam. The invention also relates to the production method of said materials, and to the use of same.

The invention relates to insulating composite materials comprising an inorganic aerogel and a melamine foam. The invention also relates to the production method of said materials, and to the use of same.

Provided is a structure having both fire resistance and heat insulation properties and capable of retaining its shape without being collapsed or deformed even when exposed to a flame. The present invention provides a fire-resistant heat-insulation composition comprising 70 to 250 parts by mass of gypsum based on 100 parts by mass of calcium aluminate having a CaO content of 34% or more, and 0.1 to 20 parts by mass of a fibrous inorganic clay mineral having a crystallization water ratio of 5% or more, based on 100 parts by mass of the total of the calcium aluminate and the gypsum.

The present invention relates to a cleaning implement that includes a melamine-formaldehyde foam. The melamine-formaldehyde foam includes from about 0.1 to about 5 weight % of at least one linear polymer with a number average molecular weight M.sub.n in the range from 500 to 10,000 g/mol. Additionally the present invention encompasses processes for making and methods for cleaning hard surfaces with a cleaning implement according to the present invention.

The present invention relates to a cleaning implement that includes a melamine-formaldehyde foam. The melamine-formaldehyde foam includes from about 0.1 to about 5 weight % of at least one linear polymer with a number average molecular weight M.sub.n in the range from 500 to 10,000 g/mol. Additionally the present invention encompasses processes for making and methods for cleaning hard surfaces with a cleaning implement according to the present invention.

A flame-retardant three-dimension-molded object and a manufacturing method thereof are disclosed. The manufacturing method includes steps of: (a) providing a molded body including plural first pores and plural second pores, wherein the plural first pores communicate inward from an outer surface of the molded body, the first pores and the second pores are partially connected to each other, and a first average pore width of the first pores is greater than a second average pore width of the second pores; (b) immersing the molded body in a flame-retardant solution composed of a flame retardant and a solvent for an immersion time under a negative pressure, so that the flame-retardant solution is introduced into the plural first pores and the plural of second pores; and (c) removing the solvent contained in the plurality of first pores and the plurality of second pores, so as to obtain the flame-retardant three-dimensional-molded object.

A flame-retardant three-dimension-molded object and a manufacturing method thereof are disclosed. The manufacturing method includes steps of: (a) providing a molded body including plural first pores and plural second pores, wherein the plural first pores communicate inward from an outer surface of the molded body, the first pores and the second pores are partially connected to each other, and a first average pore width of the first pores is greater than a second average pore width of the second pores; (b) immersing the molded body in a flame-retardant solution composed of a flame retardant and a solvent for an immersion time under a negative pressure, so that the flame-retardant solution is introduced into the plural first pores and the plural of second pores; and (c) removing the solvent contained in the plurality of first pores and the plurality of second pores, so as to obtain the flame-retardant three-dimensional-molded object.

This disclosure is related to a class of metal-ion induced hydrophobic polymers and method of producing such class of compounds by a one-step solution immersion process. Specifically, a metal-ion Induced hydrophobic polymer or melamine sponge (MII-HMS) is disclosed. Such polymer or sponge is demonstrated to be highly hydrophobic and oleophilic and exhibits excellent oil absorption capabilities, being able to absorb a wide range of oils and organic solvents up to 71 to 157 times of its own weight.