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Preparation of polyurethane rigid foam wood-like material

A technology of polyurethane rigid foam and wood imitation material, which is applied in the field of preparation of polyurethane rigid foam wood imitation material, can solve the problems of large environmental pollution, short service life of products, poor strength, etc., and achieves easy availability of raw materials, thick skin and good strength. Effect

Inactive Publication Date: 2009-08-12
无锡双象新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic fillers include calcium carbonate, talcum powder, etc. Organic fillers are mainly natural fibers such as straw, straw, and hemp. The resins used for imitation wood materials mainly include polyvinyl chloride, polyester, polystyrene, ABS, etc. The products have great environmental pollution, short service life, poor strength and other problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The catalyst is a mixture of dimethylcyclohexylamine SFC, triethylenediamine, ethylene glycol A33 and hexahydrotriazine PC-41; the foam stabilizer is AK-8805, and the blowing agent is a fluorodichloroethane HCFC- 141b and water H 2 A mixture of O; the flame retardant is phthalate DMMP. The black material is polymethylene polyphenyl polyisocyanate (trade name: PM-200, Suprasec 5005 or Desmodur 44V20L; said PM-200, Suprasec 5005 or Desmodur 44V20L are brands of different manufacturers).

[0022] Table 1 Ratio of raw materials in white material

[0023] Raw material composition mass ratio Raw material composition mass ratio Polyether polyol GR-4110

Polyether polyol GR-403

Polyether polyol GR-210

Blowing agent H 2 o

Catalyst SFC

Catalyst A33 70

10

20

0.3

0.5

0.5 Catalyst PC-41

Foam stabilizer AK-8805

Cross-linking agent Glycerol

Flame retardant DMMP

Blowing agent HCFC-141b 0.3

1.5

1.0

6.5...

Embodiment 2

[0030] Table 3 Ratio of raw materials in white material

[0031] Raw material composition mass ratio Raw material composition mass ratio GR-4110

GR-403

GR-210

h 2 o

SFC

A33 70

15

10

0.4

0.55

0.45 PC-41

AK-8805

Glycerol

Flame retardant DMMP

HCFC-141b 0.37

1.8

1.0

7.0

8.6

[0032] The black material is one of PM-200, Suprasec 5005 or Desmodur 44V20L;

[0033] Control the temperature of white material and black material at 23-25°C, the mechanical stirring speed of the equipment at 2000-3000r / min, inject a certain amount of combined material into the mold according to the ratio of white material / black material (mass ratio) of 100 / 105 , 35°C constant temperature for half an hour to demould, and the finished polyurethane hard foam imitation wood material can be obtained. The finished product has a good skin finish, basically no pinholes and air bubbles, and the skin is hard and the ...

Embodiment 3

[0039] Table 5 Ratio of raw materials in white material

[0040] Raw material composition mass ratio Raw material composition mass ratio GR-4110

GR-403

GR-210

h 2 o

SFC

A33 78

7

15

0.5

0.6

0.4 PC-41

AK-8805

Glycerol

DMMP

HCFC-141b

0.34

1.6

1.1

7.5

8.3

[0041] The black material is one of PM-200, Suprasec 5005 or Desmodur 44V20L;

[0042] Control the temperature of white material and black material at 23-25°C, the mechanical stirring speed of the equipment at 2000-3000r / min, and inject a certain amount of combined material into the mold according to the ratio of white material / black material (mass ratio) of 100 / 110 , 35°C constant temperature for half an hour to demould, and the finished polyurethane hard foam imitation wood material can be obtained. The finished product has a good skin finish, basically no pinholes and air bubbles, and the skin is hard and the overall hardness is ...

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Abstract

The invention describes a preparation method of a rigid polyurethane foam wood-imitation material. The preparation method comprises the following steps: taking a mixture of polyether glycol, a catalyst, a foam stabilizer, a foaming agent, a fire retardant and the like as a white material, taking polymethylene polyphenyl isocyanate as a black material, injecting a certain amount of the mixed materials into a mould at temperature of 23-25 DEG C of the white material and the black material with mechanical stirring rate of 2000-3000r / min and mass ratio of the white material to the black material as 100 / 105-110, and demoulding after being at constant temperature of 35 DEG C for half an hour to obtain the rigid polyurethane foam wood-imitation material. The polyether glycol in the white material is a mixture of GR-4110, GR-403 and GE-210; the catalyst is a mixture of SFC, A33 and PC-41; the foam stabilizer is AK-8805, and the foaming agent is a mixture of HCFC-141b and H2O; and the fire retardant is DMMP. The black material is PM-200, Suprasec 5005 or Desmodur 44V20L.

Description

technical field [0001] The present invention relates to a kind of preparation method of polyurethane hard foam imitation wood material, specifically, the present invention relates to a kind of white material with the mixture of polyether polyol, catalyst, foam stabilizer, blowing agent, flame retardant etc., Polymethylene polyphenyl polyisocyanate (PAPI) is used as black material, and the two are mixed in a certain proportion under certain conditions, and reacted to form a method for preparing polyurethane rigid foam imitation wood material. Background technique [0002] Natural wood has a wide range of uses and is an indispensable material in people's production and life. However, over the past few years, due to the excessive exploitation of forest resources and the lack of adequate protection of existing forest resources, the ecological environment has deteriorated and a large amount of water and soil has been lost. Therefore, some countries have strictly controlled the ex...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/08C08L75/04C08G101/00
Inventor 何天华刘敏朱晓华
Owner 无锡双象新材料有限公司
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