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Foaming agent composition, its preparation method and application

A composition and foaming agent technology, applied in the field of foam materials and polyurethane foam materials, can solve the problems of shrinkage of foam materials, high viscosity of combined polyether, and decrease of adhesive force of foam materials, and achieve the effect of convenient replacement

Active Publication Date: 2022-06-24
陈凤福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 3. The amount of water used for all-water foaming is less than the traditional amount of physical foaming agent (physical foaming agent generally accounts for 20-25% of the combined polyether, and the water for full-water foaming only accounts for 3-4% of the combined polyether ), the viscosity of the combined polyether will be very high, which is very different from the viscosity of (multi)isocyanate, which is not conducive to the production of polyurethane foam
[0011] 4. Due to the use of full water foaming with CO 2 Foaming Chemical Blowing Agent, CO 2 The escape velocity and ability are much stronger than the traditional blowing agent HCFC-141b, etc. It will penetrate the cell wall of the foam material and escape to the outside of the foam material, and it is difficult for the air outside the foam material to enter the inside of the foam material, resulting in In a vacuum state, it is easy to cause the foam material to shrink
[0012] 5. Full water foaming due to the reaction of water and (multi) isocyanate to generate CO 2 At the same time, a large amount of biuret will be generated, and the existence of biuret bonds will make the surface of the foam material crisp, thus reducing the adhesion of the foam material

Method used

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  • Foaming agent composition, its preparation method and application
  • Foaming agent composition, its preparation method and application
  • Foaming agent composition, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9 and comparative example 1

[0215] The foaming agent compositions A in Examples 1-9 and the foaming agent of Comparative Example 1 were prepared according to the ratios shown in Table 1. In Table 1, the units of numerical values ​​representing the ratios of each raw material are parts by weight. Among the raw materials used in Examples 1-9, polyether 1020D is a diol polyether, and polyether 307, polyether 310 and polyether 305 are optional triol polyethers, which are selected in Examples 1-7. White granulated sugar was added, and sorbitol was selectively added in Examples 8-9. Comparative Example 1 is a foaming agent without adding white sugar or sorbitol.

Embodiment 1

[0217] Weigh 120 grams of pure water, pour it into a three-necked flask, heat up, stir to 50 degrees, add 60 grams of white sugar, stir until all the white sugar is dissolved and become transparent, then add 320 grams of 1020D polyether, 120 grams of 307 polyether , 120 grams of plasticizer propylene carbonate, continue to stir for 20 minutes, to obtain uniform and transparent liquid, stop stirring, and measure to obtain 740 grams of chemical foaming agent, namely foaming agent composition A of the present invention.

[0218] The foaming agent compositions A in Examples 2-9 and the foaming agent composition of Comparative Example 1 were prepared according to the preparation method of Example 1.

[0219] Table 1

[0220]

Embodiment 10-17 and comparative example 2

[0222] The foaming agent composition A in Examples 10-17 and the foaming agent of Comparative Example 2 were prepared according to the ratios shown in Table 2. In Table 2, the unit of the numerical value representing the ratio of each raw material is parts by weight. Compared with the raw materials used in Examples 1-9, the raw materials used in Examples 10-17 and Comparative Example 2 were selected to add polyether polyol, that is, polyether 8310. In Examples 10-13, white granulated sugar was selectively added, and in Examples 14-17, sorbitol was selectively added. Comparative Example 2 is a foaming agent without adding white sugar or sorbitol.

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Abstract

The present invention relates to a blowing agent composition comprising: (a) water; (b) at least one low molecular weight and high functionality polyol; (c) at least one low viscosity polyether glycol, which The viscosity measured at 25° C. is 100-200 MPa·s; (d) optionally, at least one low-viscosity polyether triol whose viscosity measured at 25° C. is 120-300 MPa·s; ( e) at least one low-viscosity plasticizer whose viscosity measured at 25°C is 1‑10MPa·s; (f) optionally at least one low-viscosity polyether polyol whose viscosity measured at 25°C A resulting viscosity of 1000-2500 MPa.S; and (g) optionally at least one low viscosity polyester polyol having a viscosity of 1000-3500 MPa.S measured at 25°C. The invention also relates to the preparation method and application of the blowing agent composition.

Description

[0001] This application claims the priority of Chinese Patent Application No. "2019104931096" filed on June 6, 2019, the entire contents of which are incorporated into this application as a whole. technical field [0002] The present invention relates to the field of foams, and in particular to the field of polyurethane foams. Specifically, the present invention relates to a foaming agent composition, its preparation method and application. In particular, the present invention also relates to foams, especially polyurethane foams, obtained from the blowing agent composition. Background technique [0003] Polyurethane rigid foam is an excellent thermal insulation material, and its low thermal conductivity is unmatched by other thermal insulation materials. Therefore, it is used in a huge amount and is more and more widely used, for example, it is used in refrigerators, freezers, cold storages, refrigerated vehicles, heating pipes, water heaters, solar energy, external wall in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08K5/1565C08J9/02C08G101/00
CPCC08G18/6677C08G18/6611C08G18/4829C08G18/4812C08G18/4804C08G18/42C08G18/4018C08G18/3218C08K5/0016C08K5/1565C08J9/02C08J2375/08C08J2375/04
Inventor 陈凤福
Owner 陈凤福
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