[EN] CHEMICAL BLOWING AGENT AND THERMALLY EXPANDABLE THERMOPLASTIC COMPOSITION<br/>[FR] AGENT D'EXPANSION CHIMIQUE ET COMPOSITION THERMOPLASTIQUE THERMOEXPANSIBLE
申请人:SIKA TECHNOLOGY AG
公开号:WO2016097365A1
公开(公告)日:2016-06-23
The present invention relates to a chemical blowing agent comprising at least one tertiary alkyl carbamate. The chemical blowing agent can be activated thermally and is suitable for foaming thermoplastic materials and can for example be incorporated into thermally expandable baffle and/or reinforcement elements which are used in automotive manufacturing and building insulation.
A process for the manufacture of an acetylenically unsaturated alcohol comprising reacting formaldehyde, an aldehyde or a ketone (a carbonyl compound) with acetylene in the presence of ammonia and an alkali metal hydroxide, the molar ratio of the alkali metal hydroxide to the carbonyl compound being less than 1 : 200. The reaction products, which depending on the starting carbonyl compound are propargyl alcohol or 1-monosubstituted or 1,1-disubstituted derivatives thereof, are of use as intermediates in the synthesis of many useful end products, inter alia in the field of vitamins and carotenoids.
A prewetted cleaning wipe for cleaning surfaces and having low volatile organic chemical and low nonvolatile residue properties comprising a wipe substrate wetted with an aqueous solution of high purity water and an effective amount of an acetylenic alcohol surface active agent. The surface active agent is preferably an acetylenic diol. Preferred acetylenic diols include dimethyl octynediol and tetramethyl decynediol.