Polyurethane foam for automobile dry-method ceiling and preparation method thereof

A polyurethane foam and dry process technology is applied in the field of polyurethane foam production to achieve the effects of high molding elongation, improved efficiency and high open cell rate

Inactive Publication Date: 2018-08-07
无锡吉兴高分子材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the traditional production method can no longer keep up with the requirements of the modern automobile industry in terms of product performance and production technology.

Method used

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  • Polyurethane foam for automobile dry-method ceiling and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The formula of polyurethane foam for automobile dry roof is as follows: polyether polyol (polyether A 20 parts, polyether B 15 parts, polyether C 20 parts, polyether D, chain extender 20 parts); isocyanate mixture: polymerized MDI 100 parts 0.3 parts of catalyst 1, 0.1 part of catalyst 2; 1.8 parts of silicone oil surfactant; 10 parts of solid additive; 1.5 parts of polyurethane antioxidant; 2 parts of black color paste; 3.5 parts of water;

[0036] (1) Preparation of polyether polyol and isocyanate mixture: polyether A, polyether B, polyether C and polyether D; isocyanate mixture, wherein the ratio of the isocyanate equivalent in the isocyanate mixture to the hydroxyl equivalent in the polyether polyol is 1;

[0037] (2) Preparation of premix 1: Take the polyether A, polyether B, and polyether C prepared in step (1), put them into the agitator for premixing, the agitator speed is 10rpm / min, and the mixing time is 70min. premix1;

[0038] (3) Preparation of prepolymer...

Embodiment 2

[0045] The formula of polyurethane foam for automobile dry roof is as follows: polyether polyol (polyether A 20 parts, polyether B 15 parts, polyether C 20 parts, polyether D, chain extender 20 parts); isocyanate mixture 100-150 parts: Polymerized MDI or a mixture of polymerized MDI and pure MDI 50: 50; catalyst 1 0.3 parts, catalyst 2 0.1 parts; silicone oil surfactant 1.8 parts; solid additive 10 parts; polyurethane antioxidant 1.5 parts; black color paste 1.5 parts; water 3.8 servings.

[0046] (1) Preparation of polyether polyol and isocyanate mixture: polyether A, polyether B, polyether C and polyether D; isocyanate mixture, wherein the ratio of the isocyanate equivalent in the isocyanate mixture to the hydroxyl equivalent in the polyether polyol is 1.25;

[0047] (2) Preparation of premix 1: Take the polyether A, polyether B, and polyether C prepared in step (1), put them into the agitator for premixing, the speed of the agitator is 20rpm / min, and the mixing time is 50m...

Embodiment 3

[0054] The formula of polyurethane foam for automobile dry roof is as follows: polyether polyol (polyether A 35 parts, polyether B 15 parts, polyether C 20 parts, polyether D, chain extender 20 parts); isocyanate mixture 100-150 parts: Polymerized MDI or the mixture of polymeric MDI and pure MDI 90: 10 ratio; Catalyst 1 0.3 parts, catalyst 2 0.1 parts; Silicone oil surfactant 1.8 parts; Solid additive 10 parts; Polyurethane antioxidant 1.5 parts; Black color paste 2.5 parts; 4.5 parts of water.

[0055] (1) Preparation of polyether polyol and isocyanate mixture: polyether A, polyether B, polyether C and polyether D; isocyanate mixture, wherein the ratio of the isocyanate equivalent in the isocyanate mixture to the hydroxyl equivalent in the polyether polyol is 1.1;

[0056] (2) Preparation of premix 1: Take the polyether A, polyether B, and polyether C prepared in step (1), put them into the agitator for premixing, the speed of the agitator is 18rpm / min, and the mixing time i...

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Abstract

The invention relates to polyurethane foam for an automobile dry-method ceiling and a preparation method thereof and belongs to the technical field of production of the polyurethane foam. The polyurethane foam is prepared from polyether glycol, an isocyanate mixture, a catalyst 1, a catalyst 2, a silicone oil type surfactant, a solid additive, a polyurethane antioxidant, a pore opening agent and water through mixing and foaming. The technology provided by the invention is suitable for large-batch and multi-scale production; manpower of a foaming line can be used in other posts so that the production efficiency is effectively improved. Furthermore, when the yield is greater, the foaming rate is higher. Continuous foaming and box type foaming, which are universally accepted in an industry, have better advantages in the aspect of foam block quality; raw materials are accurately metered and foam holes are uniform; the difference of upper, middle and lower parts of the foam blocks is reduced; unavailable parts of the tops and bottoms of the foam blocks are controlled; the yield of products and the like can be improved by adopting various ceiling technologies.

Description

technical field [0001] The present invention relates to a kind of polyurethane foam for automobile dry process ceiling and its preparation method, in particular to a kind of continuous production and process of polyurethane foam used in cold molding (dry process) process of automobile roof, this polyurethane foam is mainly The utility model is used for producing dry-process boards for automobile roofs, and belongs to the technical 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 cold molding preparation of the car roof adopts the semi-rigid polyurethane foam. This kind of polyurethane semi-rigid foam is compounded into a glass fiber-reinforced polyurethane material with a similar sandwich structure when the temperature is gradually raised to 200 °C with an appropriate propo...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08G18/10C08J9/08C08G101/00
CPCC08G18/10C08G18/4804C08G18/7671C08G2110/0083
Inventor 王锦明
Owner 无锡吉兴高分子材料科技有限公司
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