Environment-friendly nano particle enhanced and modified polyurethane foamed plastic, and prefabricated directly-buried thermal insulation pipe and manufacturing method thereof
A technology of nano-particles and foamed plastics, applied in the field of polyurethane foamed plastics, can solve the problems of insufficient heating pipe network, collapse and shrinkage, and insufficient foam strength, and achieve uniform product density, improved internal quality, and enhanced mechanical properties.
Inactive Publication Date: 2017-02-08
TIANJIN JUNXING PIPE GRP CO LTD
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Problems solved by technology
[0003] The present invention designs a kind of environment-friendly nano-particle reinforced polyurethane foam, prefabricated direct-buried heat preservation pipe and its manufacturing method. There are deficiencies in rigidity, thermal insulation performance, etc. Problems such as collapse and shrinkage caused by insufficient foam strength cannot meet the needs of the heating pipe network
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[0048] Preferred formula is as follows: the polyether polyol of 93 weight parts; The nanometer SiO of 7 weight parts 2 2 parts by weight of water; 3 parts by weight of surfactant; 2.5 parts by weight of conventional amine catalysts; 1 part by weight of reactive amine catalysts; 30 parts by weight of blowing agent;
[0049] Good nano-SiO in the present invention 2 Dispersion in rigid polyurethane foam can enhance its mechanical properties. Mechanical tests show that adding nano-silica has a certain strengthening and toughening effect on rigid polyurethane foam. 2 In comparison, the compressive strength of the foam is increased by more than 20%, and the impact strength can be increased by about 30%.
[0050] The tensile strength of PUF prepared by this method is greatly improved, and the nano-SiO 2 When the nano-SiO content is 2%, the tensile strength increases with the increase of the nano-SiO content. The results of thermal analysis show that the prepared nano-SiO 2 The dec...
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The invention relates to an environment-friendly nano particle enhanced and modified polyurethane foamed plastic, and a prefabricated directly-buried thermal insulation pipe and a manufacturing method thereof. The foamed plastic comprises the following components in parts by weight: 100 parts of polyether polyol, 5 to 7 parts of nano SiO2, 1.0 to 2.0 parts of water, 1.5 to 3.0 parts of surfactant, 0.3 to 1 part of common amine catalyst, 0.4 to 2.5 parts of reaction type amine catalyst, 25 to 30 parts of foaming agent, and 145 parts of MDI system isocyanate. The produced prefabricated directly-buried thermal insulation pipe has the advantages of high strength, uniform density, good cell structure, and high compressive strength, and the problems of collapse and contraction of foams are well solved. The internal quality of thermal insulation pipe is improved; thus the production efficiency is improved effectively, the service life of the prefabricated directly-buried thermal insulation pipe is prolonged, and a better thermal insulation and energy saving effect is achieved.
Description
technical field [0001] The invention relates to an environment-friendly nano particle reinforced and modified polyurethane foam plastic, a prefabricated direct-buried thermal insulation pipe using the same and a manufacturing method thereof, which are used in central heating pipe networks. Background technique [0002] Polyurethane rigid foams prepared by traditional methods have deficiencies in toughness, strength, rigidity, thermal insulation performance, etc. Problems such as collapse and shrinkage caused by insufficient foam strength cannot meet the needs of the heating pipe network, precisely because of this Therefore, it is of great significance to modify polyurethane rigid foam and improve its performance in various aspects. Contents of the invention [0003] The present invention designs a kind of environment-friendly nano-particle reinforced polyurethane foam, prefabricated direct-buried heat preservation pipe and its manufacturing method. There are deficiencies ...
Claims
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Login to View More IPC IPC(8): C08G18/76C08G18/79C08G18/48C08K3/36F16L59/12F16L59/05C08G101/00
CPCC08G18/7671C08G18/4829C08G18/794C08G2101/00C08K3/36C08K2201/011F16L59/04F16L59/12
Inventor 夏成文韩英民吴晓芬苏世爱
Owner TIANJIN JUNXING PIPE GRP CO LTD