Modified polyurethane composition and application thereof
A polyurethane and composition technology, applied in the field of modified polyurethane composition, can solve the problems of fast polyurethane reaction rate, many preparation defects, and low production efficiency, and achieve good curing effect at room temperature, low moisture sensitivity, and high production efficiency Effect
Pending Publication Date: 2022-05-06
四川东树新材料有限公司
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- Abstract
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Problems solved by technology
However, the proportion of isocyanate in this formula is high, it is sensitive to humidity, and has many preparation defects, and the formula still has defects such as long post-curing time, slow Tg establishment, and low production efficiency.
[0005] It can be seen that the reaction rate of the existing conventional polyurethane is too fast, and the viscosity increases rapidly, so it cannot be applied to the vacuum introduction process
The composition obtained by prepolymerization modification with hydroxypropyl acrylate has the disadvantages of being sensitive to humidity, many product defects, and long post-curing time
Method used
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Embodiment 1-5
[0068] Modified polyurethane, the formula is shown in Table 1.
[0069] Table 1
[0070]
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Abstract
The invention relates to a modified polyurethane composition and application thereof, and belongs to the technical field of polyurethane composite materials. The technical problem to be solved by the invention is to provide the modified polyurethane composition. The modified polyurethane composition provided by the invention comprises the following components: a) an isocyanate component which comprises one or more isocyanates; b) a hydroxyl component which comprises polyol and a compound shown as a formula I; and c) an auxiliary agent comprising a catalyst and a free radical initiator. The modified polyurethane composition provided by the invention adopts a specific hydroxyl component, has the outstanding advantages of low moisture sensitivity, good normal-temperature curing effect, fast Tg establishment, good mechanical properties, high production efficiency and the like, and is suitable for various composite material forming processes.
Description
technical field [0001] The invention relates to a modified polyurethane composition and its application, and belongs to the technical field of polyurethane composite materials. Background technique [0002] In recent years, polyurethane composite materials have been gradually used in the field of wind turbine blades. Compared with wind turbine blades made of traditional epoxy resin, wind turbine blades made of polyurethane composite materials have the advantages of lower cost and better physical properties. However, the existing polyurethane system cannot be well used in the preparation of composite materials due to its outstanding shortcomings such as fast initial reaction, short gel time, and long post-curing time, and needs to be improved. [0003] Patent CN106221191A discloses a method for synthesizing carbon fiber / polyurethane composite materials used for fan blades. The prepolymer with terminal isocyanate groups is synthesized by the reaction of pre-dehydrated polyeth...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C08G18/67C08G18/48
CPCC08G18/673C08G18/4804C08G18/48Y02E10/72
Inventor 熊高虎周百能彭豪王恩东符罗坪钟连兵苟鹏飞肖毅
Owner 四川东树新材料有限公司