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Rigid polyurethane casting material

A technology of rigid polyurethane and pouring materials, which is applied in the field of building materials, can solve the problems of affecting the closed cell rate and density of materials, the inability to promote large-scale use, and poor adaptability to wet environments, etc., and achieve good dimensional stability, light weight, and sound insulation sex good effect

Inactive Publication Date: 2014-12-10
SHANGHAI ORIENTAL YUHONG WATERPROOF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the current market, traditional rigid polyurethane casting materials have the characteristics of high specific strength, high hardness, good compactness, good corrosion resistance, good shock resistance and good dimensional stability, but they have no flame retardancy, and there are existing The component B of the pouring material has high viscosity and poor adaptability to humid environment, so it cannot be widely used
[0003] Foamed rigid polyurethane castable material, such as Chinese patent CN1401680A announced a rigid polyurethane castable material, by adding reinforcing fibers in the formula, the wear resistance, corrosion resistance, shock resistance, impact resistance and dimensional stability of the enhanced material It is suitable for the production of structural parts and replaces some metal materials, but it does not overcome the problems of poor flame retardancy and high viscosity; other technical solutions, such as the pouring type room temperature curing polyurethane resin composition disclosed in 200910031273, and the disclosed one in 201010526534 Casting type polyurethane elastomers, polyurethane casting rollers disclosed in 201110117598, etc. have not solved the above problems
[0004] During the research and development process, the applicant tried to directly add a certain amount of flame retardant to the B component of the existing rigid polyurethane casting material in an attempt to solve the problem of flame retardancy of the product, but the applicant found that this simple solution would It affects the closed cell ratio and density of the material, and the dimensional stability after foaming will also be affected, and the improvement of flame retardancy is very limited

Method used

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  • Rigid polyurethane casting material
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  • Rigid polyurethane casting material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Component A: Accurately weigh 100 parts of polyphenyl polymethylene polyisocyanate PAPI, brand Wannate PM-200, mass fraction of NCO is 30.2-32.0%, viscosity (25°C) is 150-250mPa·s average functionality It is 2.7 (Yantai Wanhua Polyurethane Co., Ltd.).

[0028]Preparation of component B: at a temperature of 25°C, accurately weigh 4.0 parts of foam stabilizer AK-8872, 0.2 parts of triethylenediamine, 0.3 parts of dimethylcyclohexylamine, 0.6 parts of Polycat SA- 1. Add 20.0 parts of HFC-245fa, 6.0 parts of propylene glycol, 3.0 parts of glycerin, 10.0 parts of TCEP and 13.0 parts of DMMP, and accurately weigh 60 parts of polyether polyol U-8345 and 15 parts of polyester polyol Alcohol PS-4027 and 25 parts of flame-retardant polyol Friol-7190 were stirred by a stirrer for 300s at a speed of 120r / min. Among them, polyether polyol U-8345 has a hydroxyl value of 450mgKOH / g and a viscosity (25°C) of 8000mPa s (Shanghai Younot Industrial Co., Ltd.); polyester polyol PS-4027 ha...

Embodiment 2

[0034] Component A: Accurately weigh 100 parts of polyphenyl polymethylene polyisocyanate PAPI, brand Wannate PM-200, mass fraction of NCO is 30.2-32.0%, viscosity (25°C) is 150-250mPa·s, average functional The degree is 2.7 (Yantai Wanhua Polyurethane Co., Ltd.).

[0035] Preparation of component B: at a temperature of 25°C, accurately weigh 4.0 parts of foam stabilizer AK-8872, 0.2 parts of triethylenediamine, 0.3 parts of dimethylcyclohexylamine, 1.0 parts of Polycat SA- 1. Add 20.0 parts of HFC-245fa, 6.0 parts of propylene glycol, 4.0 parts of glycerin, 15.0 parts of TCEP and 20.0 parts of DMMP, and accurately weigh 40 parts of polyether polyol U-8345 and 15 parts of polyester polyol Alcohol PS-4027 and 45 parts of flame-retardant polyol Friol-7190 were stirred by a stirrer for 300s at a speed of 120r / min. Among them, polyether polyol U-8345 has a hydroxyl value of 450mgKOH / g and a viscosity (25°C) of 8000mPa s (Shanghai Younot Industrial Co., Ltd.); polyester polyol PS-...

Embodiment 3

[0041] Component A: Accurately weigh 100 parts of polyphenyl polymethylene polyisocyanate PAPI, brand Wannate PM-200, mass fraction of NCO is 30.2-32.0%, viscosity (25°C) is 150-250mPa·s, average functional The degree is 2.7 (Yantai Wanhua Polyurethane Co., Ltd.).

[0042] Component B includes 30-80 parts of polyester polyol, 10-30 parts of polyether polyol, 20-50 parts of flame-retardant polyol, 4-5 parts of foam stabilizer, 0.5-2 parts of catalyst, 8-2 parts of foaming agent 30 parts, chain extender 2-8 parts, cross-linking agent 1-4 parts and flame retardant 10-30 parts.

[0043] Preparation of component B: at a temperature of 25°C, accurately weigh 5.0 parts of foam stabilizer AK-8872, 0.1 parts of triethylenediamine, 0.1 parts of dimethylcyclohexylamine, 0.5 parts of Polycat SA- 1. Add 10.0 parts of HFC-245fa, 3.0 parts of propylene glycol, 2.0 parts of glycerin, 10.0 parts of TCPP and 2.0 parts of TDCPP, and accurately weigh 50 parts of polyether polyol SC-4110 and 24 p...

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Abstract

The invention relates to a rigid polyurethane casting material and a preparation method thereof. The rigid polyurethane casting material is prepared from a component A and a component B, wherein the component A is polymethylene polyphenyl polyisocyanic acid ester of which NCO accounts for 30.5-32.5% in percentage by mass, the functionality degree of the component A is within 2.5-3.0, and the use amount of the component A is 100 parts by weight; the component B comprises the following components: 30-80 parts of polyester polyol, 10-30 parts of polyether polyol, 20-50 parts of flame-retardant polyhydric alcohol, 4-5 parts of foam stabilizer, 0.5-2 parts of catalyst, 8-30 parts of foaming agent, 2-8 parts of chain extender, 1-4 parts of cross-linking agent and 10-30 parts of flame retardant. The rigid polyurethane casting material provided by the invention has the characteristics of light weight, high specific strength, good sound insulation property, rich foam pore in a sealed manner, low heat conduction coefficient, good corrosion resistance, good shake resistance, good size stability and the like, is applicable to various crack filling materials, repairing materials, building wall body heat-preservation materials, sound insulation materials and the like, and is good in flame retardance.

Description

technical field [0001] The invention relates to a novel rigid polyurethane pouring material with good flame retardancy and a preparation method thereof, belonging to the field of building materials. Background technique [0002] Rigid polyurethane foam is one of the commonly used materials in the construction field. It is divided into two types: spraying type and pouring type. The pouring material is mixed with component A and component B according to a certain proportion, and poured into the mold or the required Parts, such as wall and underground gaps, cracks, etc., resulting in foaming. In the current market, traditional rigid polyurethane casting materials have the characteristics of high specific strength, high hardness, good compactness, good corrosion resistance, good shock resistance and good dimensional stability, but they have no flame retardancy, and there are existing The B component of the pouring material has a high viscosity and poor adaptability to a humid e...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32C08J9/08C08J9/14
CPCC08G18/6611C08G18/3206C08G18/4018C08G18/6607C08J9/146C08J2375/04C08K5/521C08K5/5333
Inventor 韩海军王新锋段文锋
Owner SHANGHAI ORIENTAL YUHONG WATERPROOF TECH
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