A kind of fluorine-free waterproofing agent with three-dimensional silane structure and preparation method thereof

Abstract

The invention discloses a fluoride-free waterproof agent with a stereo silane structure and a preparation method of the fluoride-free waterproof agent. In a formula I of a polymer, R1 refers to a long-chain acrylate structural chain segment, R2 refers to a polyhedral oligomeric silsesquioxane structural chain segment, R3 refers to a functional monomer structural chain segment, X refers to a natural number in a range of 1-150, and Y and Z refer to natural numbers in a range of 1-100. The fluoride-free waterproof agent is aqueous emulsion of the polymer shown as the formula I. By adoption of a polyhedral oligomeric silsesquioxane monomer with a vinyl structure for preparation of the fluoride-free waterproof agent through microemulsion polymerization, introduction of polyhedral oligomeric silsesquioxane with a stereo structure to a lateral group of a polymer long chain is realized, a low-surface-energy siloxane cubic structure can migrate to the fabric fiber surface more effectively in an emulsion film forming spread process to form continuous projections on the fabric fiber surfaces, and consequently waterproof effects are greatly improved. The fluoride-free waterproof agent is an environment-friendly waterproof agent, free of biotoxicity and nondegradability and harmless to organisms and environment.

Description

technical field [0001] The invention relates to a fluorine-free waterproofing agent with a three-dimensional silane structure and a preparation method thereof. Background technique [0002] In the early 1970s, driven by the new technological revolution, the rapidly developing industrial countries led by the United States gradually realized the importance of protecting the environment. The establishment of various environmental protection organizations and the improvement of laws and regulations have restricted the development of certain industries to varying degrees, but they have also largely guaranteed the sustainable development of the earth's ecosystem. In 2000, American manufacturers launched a plan to promote the environmental protection of fluorocarbons, and reached a consensus: by 2015, all fluorocarbons used in impregnation must meet environmental protection requirements, while traditional perfluorooctyl The degradation product of fluorine-containing finishing agen...

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Problems solved by technology

In 2000, American manufacturers launched a plan to promote the environmental protection of fluorocarbons, and reached a consensus: by 2015, all fluorocarbons used in impregnation must meet environmental protection requirements, while traditional perfluorooctyl The degradation product of fluorine-containing finishing agents, perfluorooctane sulfonate / ester (PFOS), is currently recognized as one of the most difficult to degrade organic pollutants in the world, and has the possibility of persistence, bioaccumulation, and long-distance environmental transport , have a serious impact on human health and the living environment

However, traditional organosilicon-based fluorine-free waterproofing agents mainly use long-chain siloxane, carboxyl, amino, and epoxy-modified long-chain silicone oils, and the waterproof effect is not outstanding, mainly due to the fact that silicon atoms with low surface energy act as polymers. The existence of the main chain of the polymer restricts the migration of silicon atoms to a large extent, and most of the silicon atoms are embedded in the polymer, which greatly reduces the water repellent effect

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