Composite polyether, polyurethane rigid foam as well as raw material composition and usage thereof

A raw material composition and a technology for combining polyethers, which are used in the fields of polyurethane rigid foam foaming and polyurethane combined polyethers, can solve the problems of poor yellowing resistance and good dimensional stability, and achieve extended service life and good dimensional stability. Sex, smell little effect

Inactive Publication Date: 2011-06-15
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects that the polyurethane rigid foam made of the existing combined polyether is difficult to achieve good dimensional stability, good bending stre

Method used

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  • Composite polyether, polyurethane rigid foam as well as raw material composition and usage thereof
  • Composite polyether, polyurethane rigid foam as well as raw material composition and usage thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of combined polyether:

[0039] Fully mix in the stainless steel mixing tank for 4 hours according to the formula and sequence listed in Table 1 to form the combined polyether of the present invention, which is a light yellow transparent liquid with a hydroxyl value of 280 mgKOH / g and a viscosity of 900 mPa.s (25°C).

[0040] Two, the preparation method of rigid polyurethane foam for automobile roof:

[0041] The prepared combined polyether and PAPI were mixed rapidly at a material temperature of 20° C. at a mass ratio of 1:1.4, and mechanically stirred evenly to obtain rigid polyurethane foam.

Embodiment 2

[0043] 1. Preparation of combined polyether:

[0044] Fully mix in a stainless steel mixing tank for 3 hours according to the formula and sequence listed in Table 1 to form the combined polyether of the present invention. The combined polyether is a colorless transparent liquid with a hydroxyl value of 300 mgKOH / g and a viscosity of 850 mPa.s (25°C).

[0045] Two, the preparation method of rigid polyurethane foam for automobile roof:

[0046] The prepared combined polyether and PAPI were mixed rapidly at a material temperature of 20° C. at a mass ratio of 1:1.5, and mechanically stirred evenly to obtain rigid polyurethane foam.

Embodiment 3

[0048] 1. Preparation of combined polyether:

[0049] Fully mix in a stainless steel mixing tank for 2 hours according to the formula and order listed in Table 1 to form the combined polyether of the present invention, which is a colorless and transparent liquid with a hydroxyl value of 298 mgKOH / g and a viscosity of 980 mPa.s (25°C).

[0050] Two, the preparation method of rigid polyurethane foam for automobile roof:

[0051] The prepared combined polyether and PAPI were mixed rapidly at a material temperature of 20° C. at a mass ratio of 1:1.3, and mechanically stirred evenly to obtain rigid polyurethane foam.

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Abstract

The invention relates to a composite polyether which comprises 1-3 parts of polyether polyol 330N, 0.5-1 part of polyether polyol 635H, 3-5 parts of polyether polyol DV125, 3-4 parts of benzoic anhydride polyester polyol, 0.05-0.2 part of foam stabilizer, 0.05-0.2 part of cell opener, 0.02-0.1 part of polyurethane synthetic catalyst and 0.3-0.5 part of water. The invention also relates to polyurethane rigid foam as well as a raw material composition and usage thereof. The polyurethane rigid foam material can simultaneously have excellent cell opening property, size stability, bending strength and compression mildness, thus the polyurethane rigid foam material has the effects of light weight, heat isolation, sound absorption and the like and can well meet use requirements of car roof foam. Besides, the polyurethane rigid foam also has excellent yellowness resistance and prolonged service life.

Description

technical field [0001] The invention relates to the field of polyurethane rigid foam foaming, in particular to a polyurethane combined polyether. The present invention also relates to a raw material composition of polyurethane rigid foam containing the combined polyether, and a polyurethane rigid foam prepared from the raw material composition. The present invention also relates to the use of the polyurethane rigid foam as a polyurethane automobile ceiling material. Background technique [0002] Cars have gradually become an indispensable part of our production and life. In the first half of 2010, China's automobile market continued to lead the world. The cumulative production and sales of automobiles in the first half of the year were 8,472,200 and 7,185,300, respectively, a cumulative increase of 44.37% and 30.45% over the same period last year. The unprecedented prosperity of the domestic automobile industry has provided greater opportunities and challenges for the deve...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/42C08G18/18C08L75/08C08L75/06C08G101/00
Inventor 杜辉董建国王振波于鹏程
Owner SHANGHAI DONGDA POLYURETHANE
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