Waterproof coating prepolymer prepared based on polyurethane degradation product, and preparation method and application thereof
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A technology for degradation products and waterproof coatings, applied in the direction of polyurea/polyurethane coatings, coatings, plastic recycling, etc., can solve problems such as high price, and achieve the effects of solving environmental problems, high promotion value, and high economic benefits
Active Publication Date: 2016-08-17
广东越能生物技术有限公司
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Problems solved by technology
However, the materials used in existing waterproof coatings are all polyurethanes synthesized from pure raw materials, and most of them are based on imported polyurethane prepolymers, which are expensive
Method used
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Embodiment 1
[0039] S1. Break 100 parts of polyurethane elastomer product leftovers into the reaction kettle together with 10 parts of ethylene glycol and 1 part of catalyst potassium acetate;
[0040] S2. Heating, controlling the reaction temperature to 180° C., the reaction time is 3 hours, and discharging to obtain a polyurethane degradation product.
Embodiment 2
[0042] S1. 100 parts of waste polyurethane elastomer products are broken, and 5 parts of ethylene glycol, 10 parts of propylene glycol, and 3 parts of catalyst ethylenediamine are added to the reactor;
[0043] S2. Heating, controlling the reaction temperature to 230° C., the reaction time is 1 hour, and discharging to obtain a polyurethane degradation product.
Embodiment 3
[0045] S1. Break 100 parts of polyurethane elastomer product leftovers into the reaction kettle together with 10 parts of diethylene glycol, 5 parts of butanediol, and 2 parts of catalyst ethanolamine;
[0046] S2. Heating, controlling the reaction temperature to 200° C., the reaction time is 2 hours, and discharging to obtain a polyurethane degradation product.
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Abstract
The invention discloses a waterproof coating prepolymer prepared based on a polyurethane degradation product, and an application of the prepolymer in the preparation of a waterproof coating. The prepolymer is prepared through a reaction of polyol and isocyanate, and 25-50% of the polyol is replaced by the degradation product directly obtained after alcoholysis of polyurethane elastomer product scraps or wastes. The polyurethane elastomer waste raw material used in the invention is easy to obtain, so solving of the environmental protection problem of industrial polyurethane wastes is facilitated; a production method of the prepolymer is simple and has a high economic benefit; and the waterproof coating prepared from the prepolymer has the advantages of high tensile strength, large elongation at break, good hydrolysis resistance, and extremely high promotion values.
Description
technical field [0001] The invention relates to the field of recycling of polymer materials, in particular, the invention relates to the application of a waterproof coating prepolymer prepared based on polyurethane degradation products in the preparation of waterproof coatings and the prepared waterproof coating. Background technique [0002] The forms of polyurethane resin products include soft, semi-rigid and rigid foam plastics, elastomers, paint coatings, adhesives, sealants, synthetic leather coating resins, elastic fibers, etc., and are widely used in automobile manufacturing, refrigerator manufacturing, transportation, etc. Transportation, civil construction, footwear, synthetic leather, fabrics, electromechanical, petrochemical, mining machinery, aviation, medical, agriculture and many other fields, in order to protect resources and the environment, now vigorously advocate the recycling of various plastic products to achieve polyurethane The recycling of products wil...
Claims
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