Polyester type polyurethane damping material and preparation method

A technology of polyester polyurethane and damping materials, which is applied in the field of polyester polyurethane damping materials and its preparation, can solve the problems of low loss factor of damping alloys, unsatisfactory damping performance, low elastic modulus, etc., and achieve good mechanical properties and high Effect of loss factor and damping temperature range wide
CN101508762AInactive Publication Date: 2009-08-19HEBEI ENERGY RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI ENERGY RES INST
Publication Date
2009-08-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a polyester polyurethane damping material with dimethyl structure with the same carbon number on main chain and a preparation method thereof. The preparation method comprises the following steps: A. allowing polyester glycol dehydrated in vacuum to react with diisocyanate to synthesize a prepolymer; and B. allowing the prepolymer to react with a chain extender or block and graft to synthesize the polyester polyurethane damping material with dimethyl structure with the same carbon number on the main chain; choosing 3,3'-dichloro-4,4'-diaminodiphenylmethane, 3,5- dimethythiotoluene diamine, 1,4-butanediol or trimethylolpropane as the chain extender for room temperature vulcanization. The polyester polyurethane damping material has good thermal stability, acid and alkali resistance, hydrolytic resistance, weatherability and high damping property. Meanwhile, the polyester main chain contains ester group with strong polarity, and forms a plurality of hydrogen bonds with urethane group to improve intermolecular acting force, thus the polyester polyurethane has good mechanical property. High-performance damping materials for use under different temperature can be obtained by adjusting position of damping peak by changing molecular weight of the polyester glycol and by adding liquid packing. The preparation method is simple with low energy consumption.
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Description

technical field

[0001] The invention relates to a polyester polyurethane damping material and a preparation method thereof, and belongs to the technical field of synthesis of organic polymer materials or synthesis of shock-absorbing and noise-reducing materials. Background technique

[0002] Polyurethane is a polymer damping material that has been studied more at home and abroad and has practical value. This is because polyurethane itself has a large number of hydrogen bonds, a certain degree of microphase separation structure, and a high damping factor. The advantage of polyurethane as a damping material is that it can obtain a damping material with a wide temperature range and a high loss factor by adjusting the ratio of soft and hard segments. The usual polyester polyurethane damping material is a series of soft and hard polymers composed of polyether or polyester as the soft segment and diisocyanate and diamine or diol chain extender as the hard segment. The ratio of so...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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