Production of MDI-polyurethane microporous elastomer

A technology of microcellular elastomer and polyurethane, which is applied in the field of polyurethane microcellular elastomer preparation, can solve the problems of large dynamic fatigue deformation value of MDI-based microcellular elastomer products, and achieve optimization of physical and mechanical properties and improvement of dynamic fatigue deformation value , the effect of reducing randomness
CN1982352AInactive Publication Date: 2007-06-20上海凯众聚氨酯有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
上海凯众聚氨酯有限公司
Publication Date
2007-06-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

Production MDI-base polyurethane micro-porous elastomer is prepared by performed polymer, reacting excess polyisocyanate with polyhydroxy compound at 120-140degree to from NCO-base performed polymer, pouring, mixing performed polymer with chain extender proportionally, injecting reactive liquid into mould at 80-95degree, pre-curing, de-molding, and after-curing for de-molded product at 110degree for 13-16hrs. It can be used for buffering and shock-absorbing components.
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Description

technical field

[0001] The invention relates to a preparation method of polyurethane microporous elastomer, in particular to the technical improvement of optimizing the physical properties of the product. Background technique

[0002] Due to the excellent static and dynamic mechanical properties of polyurethane microcellular elastomers, it is especially used in rocking vibration and damping systems. Their industrial importance is due to the combination of their good mechanical properties and cheap and convenient processing methods. Using various chemical structural components in different mixing ratios can produce products with widely different mechanical properties and processability. As we all know, microcellular elastomers based on 1.5-NDI have excellent performance, but their production process has shortcomings such as short storage stability of prepolymers and long production cycles; while microcellular elastomers based on MDI have large deformation under dynamic load ...

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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