4 results about "Blowing agent" patented technology

The invention relates to the use of a composition as an agent for blowing a projected biocomponent polyurethane foam, said composition including 1-chloro-3,3,3-trifluoropropane and/or 2-chloro-3,3,3-trifluoropropene and at least one additional compound selected from among hydrochlorofluoroolefins, hydrofluoroolefins, hydrochloroolefins, hydrofluorocarbons, hydrochlorofluorocarbons, hydrocarbons, substituted or non-substituted ethers, substituted or non-substituted alcohols, substituted or non-substituted aldehydes, substituted or non-substituted ketones and substituted or non-substituted esters. Said composition has a boiling point greater than or equal to 20° C. The invention also relates to a method for manufacturing polyurethane foam on the basis of the use above and moreover relates to specific compositions that are appropriate for implementing the invention.

The invention discloses a method for strengthening a cold-formed thin-walled steel column based on geopolymer foam concrete. The method specifically comprises the steps of using cold-formed thin-walled steel for building a column base body in a surrounding mode, uniformly stirring the slag powder and the fly ash, then adding the construction waste powder, and stirring to obtain a powder base material, adding an alkali activator and water into a concrete mixer, stirring, sequentially adding polypropylene staple fibers, a powder base material and a foaming agent, and stirring in batches to obtain geopolymer foam concrete slurry, pouring the geopolymer foam concrete slurry into the column base body, standing and foaming, and curing to obtain the geopolymer foam concrete reinforced cold-formed thin-walled steel column. The cold-formed thin-walled steel-geopolymer foam concrete column is adopted as a novel combined component in the light steel and light concrete combined structure, good sound insulation and noise reduction performance can be achieved, the empty drum sound of an existing light steel structure can be eliminated, and the requirement of the national building sound insulation standard can be met.

Heat-expandable microspheres and applications thereof, the heat-expandable microspheres including a thermoplastic resin shell and a thermally-vaporizable blowing agent encapsulated therein. The thermoplastic resin is produced by polymerizing a polymerizable component containing (A) a nitrile monomer including methacrylonitrile, (B) a carboxyl-group-containing monomer and (C) a monomer having a functional group reactive with the carboxyl group. The polymerizable component satisfies the following conditions 1 and 2:

• • Condition 1: The weight fraction of the monomers (A), (B) and (C) in the polymerizable component satisfy the inequality shown below.

Weight fraction of the monomer (C)<Weight fraction of the monomer (A)≤Weight fraction of the monomer (B)   Inequality (I)

• • Condition 2: The ratio by weight of the monomer (B) to the monomer (C) ranges from 600:1 to 3:1.