Polyurethane composite polyether, polyurethane rigid foam and preparation method of polyurethane rigid foam
A technology of combining polyether and rigid foam, applied in the field of polyurethane materials, can solve the problems of low smoke density, high compressive strength to density ratio, reduce foam mechanical properties, etc., achieve flame retardancy and smoke suppression performance improvement, high compressive strength Effect of Density Ratio, Specific Extinction Area Reduction
Inactive Publication Date: 2018-07-10
成都利亨聚氨酯新材料有限公司
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Abstract
The invention belongs to the technical field of polyurethane materials. In order to solve the problems that the polyurethane foam in the prior art has low flame retardancy, poor mechanical performance, large smoke amount, relatively low compression strength-density ratio, relatively low oxygen index-density ratio, relatively large smoke density, and the like, the invention provides polyurethane composite polyether, polyurethane rigid foam and a preparation method of the polyurethane rigid foam. The polyurethane composite polyether comprises a component A, and the component A comprises the following components in parts by weight: 30-70 parts of melamine polyol, 30-70 parts of phosphorus-containing polyester glycol, 10-20 parts of a smoke-suppression fire retardant, 10-25 parts of a physicalfoaming agent, 1-3 parts of a foam stabilizer, 1-2 parts of a chemical foaming agent and 2-5 parts of a catalyst. The polyurethane rigid foam comprises the component A and a component B, wherein thecomponent B is polymethylene polyphenyl polyisocyanate, the weight ratio of the component A to the component B is 1:(1.0-1.7). The polyurethane rigid foam also has the characteristics of high compressive strength-density ratio and high oxygen index-density ratio.
Technology Topic
ChemistryHigh oxygen +13
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PUM
Property | Measurement | Unit |
Density | 30.0 ~ 50.0 | kg/m³ |
Acid value | <= 1.0 | mgKOH/g |
Hydroxyl value | 190.0 ~ 200.0 | mgKOH/g |
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