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Polyurethane raw material composition, preparation method and application of polyurethane rigid foam

A technology of raw material composition and polyurethane rigid foam, which is applied in the field of polyurethane raw material composition, can solve the problems of inconsistency in performance and low thermal conductivity, achieve good dimensional stability, good heat insulation effect, improve fluidity and controllability Effect

Active Publication Date: 2022-04-15
NANJING HONGBAOLI POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is in order to solve the existing technical problem that various properties cannot be taken into account at the same time. The present invention first proposes a kind of polyurethane raw material composition, adopts the polyurethane foam prepared by this polyurethane raw material composition to have thermal conductivity low, fluidity, Excellent adhesion and dimensional stability

Method used

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  • Polyurethane raw material composition, preparation method and application of polyurethane rigid foam
  • Polyurethane raw material composition, preparation method and application of polyurethane rigid foam
  • Polyurethane raw material composition, preparation method and application of polyurethane rigid foam

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Effect test

Embodiment 1

[0045] According to the 1# formulation components in Table 1, mix the complex polyol, adhesion promoter, foam stabilizer, catalyst and water evenly to obtain the combined polyether, then add foaming agent I, mix evenly, and control the system temperature to 28°C to obtain mixed component A; add foaming agent II to isocyanate, mix well, and control the system temperature to 12°C to obtain mixed component B; mix mixed component A and mixed component B under normal pressure, inject In the mold, the mold temperature is 50°C, and the demoulding time is 160s to obtain 1# polyurethane foam.

Embodiment 2

[0047] According to the 2# formulation components in Table 1, mix the complex polyol, adhesion promoter, foam stabilizer, catalyst and water evenly to obtain the combined polyether, then add foaming agent I, mix evenly, and control the system temperature to 25°C to obtain mixed component A; add foaming agent II to isocyanate, mix well, and control the system temperature to 5°C to obtain mixed component B; mix mixed component A and mixed component B under normal pressure, inject In the mold, the mold temperature was 40°C, and the demoulding time was 163s to obtain 2# polyurethane foam.

Embodiment 3

[0049] According to the 3# formulation components in Table 1, mix the complex polyol, adhesion promoter, foam stabilizer, catalyst and water evenly to obtain the combined polyether, first add foaming agent I, then add foaming agent II, mix Uniform and control the system temperature at 15°C to obtain mixed component C; adjust the temperature of isocyanate to 15°C; mix mixed component C and isocyanate under normal pressure, inject it into the mold, the mold temperature is 38°C, and the demoulding time is 165s to obtain 3 #Polyurethane foam.

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Abstract

The invention discloses a polyurethane raw material composition, which comprises a combined polyether, isocyanate, foaming agent I and foaming agent II, the combined polyether contains an adhesion promoter, the isocyanate is a polyisocyanate, and the average functionality ≥2.5, the foaming agent I is a physical foaming agent with a boiling point of >10°C, and the foaming agent II is a physical foaming agent with a boiling point of ≤10°C. And two preparation methods of polyurethane rigid foam, and the application of these two preparation methods. The polyurethane foam prepared by the invention has the characteristics of low thermal conductivity, good fluidity, high bonding strength, good dimensional stability and environmental protection.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a polyurethane raw material composition, a preparation method for producing rigid polyurethane foam materials with the polyurethane raw material composition, and an application of the preparation method. Background technique [0002] Rigid polyurethane foam has excellent thermal insulation properties and is widely used as thermal insulation material. Its thermal conductivity, dimensional stability, cohesiveness, etc. are key indicators for evaluating its performance. [0003] The lower the thermal conductivity of the foam, the better the thermal insulation performance. In order to obtain polyurethane materials with low thermal conductivity, isocyanates with higher functionality are usually used, but their fluidity is poor, which affects other properties of the product; for example, during the filling process of complex cavities, the fluidity of the foaming liquid is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/50C08G18/48C08G18/42C08J9/14C08G101/00
CPCC08G18/482C08G18/5027C08G18/5024C08G18/48C08G18/4883C08G18/4804C08G18/4208C08G18/4018C08J9/149C08J9/141C08J9/146C08J9/144C08J2203/14C08J2203/162C08J2203/182C08J2203/202C08G2110/0025
Inventor 邢益辉吴一鸣芮强张蒙蒙
Owner NANJING HONGBAOLI POLYURETHANE
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