Polyurethane prepolymer, preparation method thereof and preparation method of environmentally friendly polyurea moving scene layer

Abstract

The invention discloses a polyurethane prepolymer, a preparation method thereof and a preparation method of an environmentally friendly polyurea moving scene layer, which relate to the technical fieldof polyurethane materials. The preparation raw materials of the polyurethane prepolymer comprise 55 to 90 parts of polyether polyol, 10 to 25 parts of polyisocyanate and 2 to 6 parts of fatty group or alicyclic diisocyanate; and fatty group or alicyclic diisocyanate is preferably hexamethylene diisocyanate. The preparation method of the polyurethane prepolymer is characterized in that the above formula is the raw materials, polyether polyol is subjected to vacuum dehydrating and then subjected to a reaction with the polyisocyanate and the fatty group or alicyclic diisocyanate to obtain an intermediate. The preparation method of the environmentally-friendly polyurea moving scene layer is characterized by mixing the polyurethane prepolymer and the curing agent, and the prepared moving scenelayer has good yellowing resistance and is an environment-friendly material.

Description

technical field [0001] The invention relates to the technical field of polyurethane materials, and in particular to a polyurethane prepolymer, a preparation method thereof and a preparation method of an environment-friendly polyurea sports surface layer. Background technique [0002] Generally speaking, in the production of sports surface layer, polyurethane prepolymer and curing agent are mixed and cured to form a film. Polyurethane prepolymer is obtained by reacting polyisocyanate and polyether polyol. The curing agent is generally polyether polyol and diamine expander Chain agent, and assist some fillers, additives, etc. The polyurethane prepolymer and the curing agent are mixed in a certain ratio, and a small amount of catalyst and diluent are added at the same time, and then cured to form a film. [0003] The prior art has the following problems in terms of environmental protection: (1) when producing polyurethane prepolymers, the polyisocyanates added are mostly toxic...

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Problems solved by technology

[0003] The prior art has the following problems in terms of environmental protection: (1) when producing polyurethane prepolymers, the polyisocyanates added are mostly toxic toluene diisocyanate (TDI), which has a large vapor pressure and is volatile and poisonous, which is the main cause of poisonous runways. Source; (2) The diamine in the curing agent B component, mostly adopts Moca (MOCA). Although Moca has excellent performance, it is a carcinogen, which is easy to bring harm to the production operator; (3) Curing agent B group Volatile and toxic solvents are often added to the part, such as benzene and toluene; (4) Toxic and harmful plasticizers are often added to the curing agent component B, such as phthalates, and excessive use will sterilize boys; (5) When mixing components A and B, poisonous heavy metal catalysts such as lead and mercury are often added; (6) When mixing components A and B, the diluent added is mostly toxic ethyl acetate solvent, which has a strong smell and is very irritating

[0004] The existing technology has the following problems in performance: (1) poor weather resistance; (2) poor stain resistance, easy to absorb dust, dirty surface, not suitable for cleaning; disconnected, separated

In addition, the existing technology still has the problem of inconvenient construction, and problems such as bubbling are very easy to occur during the construction process, which brings difficulties to the construction

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