A special foaming agent for chlorine-free fluorine polyurethane and its preparation method

A chlorofluorourethane and foaming agent technology, applied in the field of foaming agents, can solve the problems of use limitation, severe water reaction, difficult control, etc., and achieve the effects of uniform and controllable foaming, high preparation efficiency, and uniform foaming

Active Publication Date: 2020-06-16
佛山市顺德区文锦机车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although in the prior art, clean water that generates carbon dioxide gas after the reaction is used as a blowing agent for polyurethane foam, its use is limited due to the violent reaction of water and it is difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A special blowing agent for chlorine-free fluorine polyurethane, comprising the following raw materials in parts by weight: 20 parts of lauric acid, Na 2 SO 4 10H 2 30 parts of O, 1 part of sulfonated ricinoleol sodium salt foam stabilizer.

[0023] A kind of preparation method of above-mentioned non-chlorine fluorine polyurethane special foaming agent, comprises the steps:

[0024] (1) Na 2 SO 4 10H 2 O is heated to a liquid state for subsequent use;

[0025] (2) heating the phase change material lauric acid to a liquid state, then adding the liquid hydrated inorganic matter obtained in step (1), and forming an emulsion by high-speed stirring;

[0026] (3) Send the emulsion obtained in step (2) into a sprayer, spray it into a liquid nitrogen pool, and condense to form particles coated with inorganic hydrates by phase change materials, that is, a special blowing agent for chlorine-free fluoropolyurethane.

[0027] The special foaming agent embodiment of chlorine-...

Embodiment 2

[0029] A special blowing agent for chlorine-free fluorine polyurethane, comprising the following raw materials in parts by weight: 30 parts of myristic acid, Na 2 HPO 4 12H 2 30 parts of O, 2 parts of silicone foam stabilizer.

[0030] A kind of preparation method of above-mentioned non-chlorine fluorine polyurethane special foaming agent, comprises the steps:

[0031] (1) The hydrated inorganic Na 2 HPO 4 12H 2 O is heated to a liquid state for subsequent use;

[0032] (2) heating the phase change material myristic acid to a liquid state, then adding the liquid hydrated inorganic matter obtained in step (1), and forming an emulsion by high-speed stirring;

[0033] (3) Send the emulsion obtained in step (2) into a sprayer, spray it into a liquid nitrogen pool, and condense to form particles coated with inorganic hydrates by phase change materials, that is, a special blowing agent for chlorine-free fluoropolyurethane.

[0034] The special foaming agent embodiment of chlo...

Embodiment 3

[0036] A special foaming agent for chlorine-free fluorine polyurethane, comprising the following raw materials in parts by weight: 40 parts of palmitic acid, CaCl 2 ·6H 2 O 15 parts, foam stabilizer sulfonated ricinoleol sodium salt 6 parts.

[0037] A kind of preparation method of above-mentioned non-chlorine fluorine polyurethane special foaming agent, comprises the steps:

[0038] (1) The hydrated inorganic substance CaCl 2 ·6H 2 O is heated to a liquid state for subsequent use;

[0039] (2) Heating the phase change material palmitic acid to a liquid state, then adding the liquid hydrated inorganic matter obtained in step (1), and forming an emulsion by high-speed stirring;

[0040] (3) Send the emulsion obtained in step (2) into a sprayer, spray it into a liquid nitrogen pool, and condense to form particles coated with inorganic hydrates by phase change materials, that is, a special blowing agent for chlorine-free fluoropolyurethane.

[0041] The special foaming agent...

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Abstract

The invention belongs to the technical field of foaming agents and specifically relates to a chloride-fluorine-free polyurethane dedicated foaming agent which is prepared from the following raw materials in parts by weight: 20 to 40 parts of phase-transformation material, 15 to 30 parts of hydrated inorganic matter and 1 to 6 parts of foam stabilizer. According to the chloride-fluorine-free polyurethane dedicated foaming agent disclosed by the invention, a principle that the hydrated inorganic matter stably exists under low temperature and has good reaction activity under high temperature is utilized, and the phase-transformation material is coated by the hydrated inorganic matter to form a particle foaming agent; the chloride-fluorine-free polyurethane dedicated foaming agent can evenly disperse in isocyanate; when polyurethane synthesizing reaction is performed, the phase-transformation material is molten into liquid due to heat, a coating material of the hydrated inorganic matter contacts a polyurethane reaction system, and crystal water in hydrate is released along with temperature increasing to generate carbon dioxide with isocyanate to be quickly foamed. The foaming agent is even in foaming, a reaction process is easy to control, the defects that directly using water foaming is strong in reaction and difficult to control are effectively overcome, and reliable technological support is provided for cleanly, efficiently and stably preparing the polyurethane foaming material.

Description

technical field [0001] The invention belongs to the technical field of foaming agents, and in particular relates to a special foaming agent for chlorine-free fluorine polyurethane and a preparation method thereof. Background technique [0002] Polyurethane foam has excellent thermal properties, and its thermal conductivity is lower than that of air (polyurethane thermal conductivity ≤0.023W / m.K / 25°C; air thermal conductivity ≤0.025 W / m.K / 25 ℃), is a commonly used thermal insulation material in engineering. The insulation effect of 50mm thick PU rigid foam is equivalent to 80mm thick EPS, 90mm thick mineral wool, and 760mm thick concrete. With the sharp increase of energy costs and people's increasingly stringent requirements for environmental protection (reducing emissions of C02, S02, N02, etc.), polyurethane foam, as the most excellent thermal insulation material, is used more and more in global building energy conservation and thermal insulation. widely. [0003] Polyu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/08C08L75/04
CPCC08J9/08C08J2203/02C08J2375/04
Inventor 陈庆王镭迪曾军堂
Owner 佛山市顺德区文锦机车配件有限公司
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