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Polyurethane foam for wet-method preparation and preparation method thereof

A polyurethane foam and wet process technology, applied in the field of polyurethane foam production, can solve the problems of high closed cell rate and sound absorption performance that cannot meet the requirements of the main engine factory, and achieve the effect of uniform cells, narrowed differences, and accurate raw material measurement

Active Publication Date: 2015-05-06
WUXI GISSING AUTO PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar products currently on the market have certain limitations to meet the requirements of the automotive industry, such as high closed cell rate, etc., resulting in sound absorption performance that cannot meet the requirements of OEMs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Configuration of part A material: Take 100 parts of polyether polyol, 0.5 part of glycerin, 0.1 part of cell opening agent, 0.1 part of antioxidant, put them into the mixer for pre-mixing, the speed of the mixer is 10rpm / min, and the mixing time is 50min to obtain the premixed A material;

[0039] Described polyether polyol composition is as follows:

[0040] Polyether A, sugar or sorbitol or glycerin, hydroxyl value 450, 10 parts;

[0041] Polyether B, phthalic anhydride polyester polyether, hydroxyl value 200, 5 parts;

[0042] Polyether C, glycerol polyether, polyether with a hydroxyl value of 28, 10 parts;

[0043] Polyether D, chain extender, hydroxyl value 56, 10 parts;

[0044] Polyether E, 3 parts of natural soybean polyether, hydroxyl value 20;

[0045] Polyether F, 1 part of hexamethylene diamine polyether, hydroxyl value 450;

[0046] Polyether G, glycerin, hydroxyl value 160, 10 parts.

[0047] The polyether polyol also includes 1 part of soybean o...

Embodiment 2

[0057] (1) Configuration of part A material: Take 100 parts of polyether polyol, 5 parts of glycerin, 2 parts of cell opener, 1.0 part of antioxidant, put them into the mixer for pre-mixing, the speed of the mixer is 20rpm / min, and the mixing time is 70min, obtain the premix A material;

[0058] Polyether A, glycerol, hydroxyl value 650, 30 parts;

[0059] Polyether B, phthalic anhydride polyester polyether, hydroxyl value 350, 35 parts;

[0060] Polyether C, glycerol polyether, polyether with a hydroxyl value of 35, 40 parts;

[0061] Polyether D, chain extender, hydroxyl value 160, 35 parts;

[0062] Polyether E, one of 30 parts of natural soybean polyether, palm oil polyether polyol or polymer polyether, the hydroxyl value is 56;

[0063] Polyether F, 10 parts of diamine polyether, hydroxyl value 800;

[0064] Polyether G, glycerin, hydroxyl value 240, 30 parts.

[0065] (2) Preparation of material B: material B is pure MDI or a mixture of polymeric MDI and MDI at a ra...

Embodiment 3

[0074] (1) Configuration of part A material: Take 100 parts of polyether polyol, 0.5-5 parts of glycerin, 0.1-2 parts of cell opener, 0.1-1.0 parts of antioxidant, put them into the mixer for pre-mixing, and the speed of the mixer is 10 -20rpm / min, the mixing time is 50-70min, to get the premix A material;

[0075] Polyether A, sorbitol, hydroxyl value 500, 20 parts;

[0076] Polyether B, phthalic anhydride polyester polyether, hydroxyl value 300, 20 parts;

[0077] Polyether C, glycerol polyether, polyether with a hydroxyl value of 30, 25 parts;

[0078] Polyether D, chain extender, hydroxyl value 100, 20 parts;

[0079] Polyether E, 15 parts palm oil polyether polyol, hydroxyl value 30;

[0080] Polyether F, 6 parts of diamine polyether, hydroxyl value 600;

[0081] Polyether G, glycerin, hydroxyl value 200, 20 parts.

[0082] (2) Preparation of material B: material B is a mixture of pure MDI or polymeric MDI and MDI at a ratio of 50-90: 50-10, which is also poured into...

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Abstract

The invention relates to polyurethane foam for wet-method preparation and a preparation method thereof, and belongs to the field of polyurethane foam production. The polyurethane foam is used for wet-method preparation of an automobile skylight sun shield or an automobile top. The polyurethane foam comprises a material A composed of polyether polyol, glycerin, silicone oil, water, a catalyst 1, a reaction catalyst 2, a low-volatility catalyst, an opening agent, and an anti-oxidant, and also comprises a material B composed of a mixture of pure MDI or polymerized MDI and MDI. The material A and the material B are mixed according to the above ratio and then are foamed to form the polyurethane foam for wet-method preparation of an automobile skylight sun shield or an automobile top. The preparation method is mainly used for a foaming continuous-production line. The preparation method is suitable for large-scale multi-size production. The more yield is, the higher foaming rate is. The preparation method has the advantages that in the industry, it is recognized that continuous foaming and box type foaming have the advantages of high foaming quality, accurate raw material metering, and uniform foam apertures; difference of upper, middle and lower parts of the foam block is reduced; unavailable upper and lower parts of the foam block can be controlled; and through multiple top flattening technologies, a foam yield is improved.

Description

technical field [0001] The invention relates to a polyurethane foam for wet preparation and a preparation method thereof. The polyurethane foam is mainly used in the production of sunroof sunshades and roofs of automobiles by wet method, and belongs to the field of polyurethane foam production. Background technique [0002] Polyurethane foam is widely used in life, and plays an important role in the manufacture of various parts of automobiles, especially polyurethane foam materials in interior parts. The semi-rigid foam of polyurethane is used in the wet preparation of the sunroof sunshade and roof of the car. Polyurethane semi-rigid foam is compounded with glass fiber, adhesive film and non-woven fabric under the action of polyurethane adhesive under a pressurized mold at about 130°C to form a car sun visor or roof. This process can provide automobile factories with products that meet rigidity and usage requirements, such as ductility, dimensional stability for environment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/48C08G18/61C08G18/32C08J9/08C08L75/08C08G101/00
Inventor 王锦明张菁
Owner WUXI GISSING AUTO PARTS CO LTD
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