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A technology of elastomers and polyester polyols, applied in polyurea/polyurethane coatings, devices for coating liquids on surfaces, coatings, etc., can solve problems such as poor regularity, difficult molecular design, and susceptibility to moisture
Active Publication Date: 2012-06-20
SHANGHAI MOERSHU CORP DEVING +1
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[0007] The technical problem to be solved by the present invention is to overcome the defects of prepolymer viscosity usually very high, or easily affected by moisture, poor regularity, and difficult to carry out molecular design in the existing preparation method of spraying elastomer, and provides a Spray coating elastomer, prepolymer of spray coating elastomer, their raw material composition and preparation method, and a sanitary product
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Embodiment 1-8
[0077] The formula is listed in Table 1 and Table 2, and the unit of each figure in Table 1 and 2 is KG. In Table 1, "NCO% (weight)", "viscosity (CP)", and "specific gravity" are all indicators of products obtained in the following step (1). "NCO% (weight)" is the mass percentage of free isocyanate groups.
[0078] (1) Preparation of component A in the formula (prepolymer component):
[0079] Dehydrate the polyol required for the reaction in vacuum at 90°C for 3h, then add the corresponding carbodiimide-modified MDI (C-MDI) at 75°C and mix for 1-3h, until the theoretically designed mass percentage of free isocyanate groups is reached After content, add oxazolidine water remover and reactive diluent to get A-component semi-prepolymer.
[0080] (2) Preparation of component B in the formula (resin component)
[0081] Component B resin is prepared by mixing polyoxypropylene diamine, polyoxypropylene triamine, moderator, amine chain extender, anti-biological additive, flame reta...
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Abstract
The invention discloses a spraying elastomer raw material composition. The composition comprises an A component raw material and a B component raw material, wherein the A component raw material comprises one or more of polyester polyol having a number-average molecular weight of 400-3000, polyether polyol having a number-average molecular weight of 400-3000, vegetable oil polyol having a number-average molecular weight of 400-2000, amino-terminated polyether having a number-average molecular weight of 200-4000 and polyisocyanate; and the B component raw material comprises polyoxypropylene diamine having a number-average molecular weight of 200-4000, polyoxypropylene triamine having a number-average molecular weight of 400-5000, active aromatic diamine and aromatic diamine. The invention also discloses a prepolymer of a spraying elastomer, a raw material composition and a preparation method of the prepolymer as well as a bathroom product. The spraying elastomer disclosed by the invention is good in various comprehensive properties; and after pressed, the product can memory the original shape, thereby improving the whole comfortable sensation and broadening the use range of the spraying elastomer.
Description
technical field [0001] The invention specifically relates to a novel shape-memory spraying elastomer, a prepolymer of the spraying elastomer, their raw material composition and preparation method, and a novel sanitary product prepared therefrom. Background technique [0002] At present, the materials used for bathroom products mainly include: acrylic, cast iron enamel, steel plate enamel, fiberglass, glass fiber, artificial agate, artificial marble, terrazzo, wood, ceramics, etc. Cast iron enamel, steel plate enamel, artificial agate, artificial marble, terrazzo, etc. have the disadvantages of high price, poor heat preservation, single color and shape limited by the process, and heavy, unsuitable for installation and handling, and expensive; ceramic materials are bulky and expensive , fragility and other shortcomings; solid wood products need to use hard wood, high density, and good anti-corrosion materials, such as spruce, oak, pine, cedar, etc., but generally the price is ...
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