A kind of polyurethane board and preparation method thereof

A polyurethane and board technology, applied in the field of polyurethane foam plastic materials, can solve the problems of low processing efficiency, cumbersome process, and high processing cost of bakelite boards, and achieve high production and secondary processing precision, not easy to warp, and low linear shrinkage. Effect

Active Publication Date: 2015-08-05
昆山市柳鑫电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a polyurethane board and its preparation method, aiming at solving the problems of high processing cost, cumbersome process and low processing efficiency of the current bakelite board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The present invention is used to prepare the component of polyurethane sheet material to comprise by weight percentage:

[0061] 1. Sorbitol-based polypropylene oxide polyether polyol with a hydroxyl value of 500 mgKOH / g 40%;

[0062] 2. Polypropylene oxide polyether polyols based on sucrose with a hydroxyl value of 450 mgKOH / g 0%;

[0063] 3. Propylene glycol-based polypropylene oxide polyether polyol with a hydroxyl value of 110 mgKOH / g 7%;

[0064] 4. Glycerin 0%;

[0065] 5. Catalyst: A33 0.2%;

[0066] 6. Foam stabilizer: 8539A 1.2%;

[0067] 7. Foaming agent: 141B 0%;

[0068] 8. Talc powder (1250 mesh) 40%;

[0069] 9. Wood flour (200 mesh) 7%;

[0070] 10. Glass fiber (alkali-free glass fiber with diameter less than 10μm, cutting length less than 10mm) 5%.

[0071] The talcum powder and wood powder are dehydrated at a temperature of 180° C. to make the water content less than 1%. Prepare the composite filler polyether polyol component in proportion with ...

Embodiment 2

[0077] 1. Sorbitol-based polypropylene oxide polyether polyol with a hydroxyl value of 500 mgKOH / g 30%;

[0078] 2. Polypropylene oxide polyether polyol with a hydroxyl value of 450 mgKOH / g based on sucrose 10%;

[0079] 3. Propylene glycol-based polypropylene oxide polyether polyol with a hydroxyl value of 110 mgKOH / g 7%;

[0080] 4. Glycerin 0%;

[0081] 5. Catalyst: A33 0.2%;

[0082] 6. Foam stabilizer: 8539A 1.2%;

[0083] 7. Foaming agent: 141B 0%;

[0084] 8. Talc powder (1250 mesh) 40%;

[0085] 9. Wood flour (200 mesh) 7%;

[0086] 10. Glass fiber (alkali-free glass fiber with diameter less than 10μm, cutting length less than 10mm) 4.6%.

[0087] The talcum powder and wood powder are dehydrated at a temperature of 150° C. to make the water content less than 1%. Prepare the composite filler polyether polyol component with the above 10 raw materials in proportion, take 100 parts by weight of the composite filler polyether polyol component, stir and mix it with 53...

Embodiment 3

[0091] 1. Sorbitol-based polypropylene oxide polyether polyol with a hydroxyl value of 500 mgKOH / g 10%;

[0092] 2. Polypropylene oxide polyether polyol with a hydroxyl value of 450 mgKOH / g based on sucrose 30%;

[0093] 3. Propylene glycol-based polypropylene oxide polyether polyol with a hydroxyl value of 110 mgKOH / g 7%;

[0094] 4. Glycerin 0.2%;

[0095] 5. Catalyst: A33 0.2%;

[0096] 6. Foam stabilizer: 8539A 1.2%;

[0097] 7. Foaming agent: 141B 0%;

[0098] 8. Talc powder (1250 mesh) 40%;

[0099] 9. Wood flour (200 mesh) 7%;

[0100] 10. Glass fiber (alkali-free glass fiber with diameter less than 10μm, cutting length less than 10mm) 4.4%.

[0101] The talcum powder and wood powder are dehydrated at a temperature of 200° C. to make the water content less than 1%. Prepare the composite filler polyether polyol component in proportion with the above 10 kinds of raw materials, take 100 parts by weight of the composite filler polyether polyol component, carry out ai...

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Abstract

The invention discloses a polyurethane board and a preparation method thereof. The manufacturing method comprises the following steps of uniformly mixing a component A, a component B and compound filler to prepare a foaming material, injecting the foaming material into a die for compression molding, and finally demoulding to form a polyurethane board product, wherein the component A comprises a polyether polyol auxiliary a and a polyester polyol auxiliary b; the component B is isocyanate; the filler is prepared from an inorganic powder material, a plant powder material and a fiber material. According to the manufacturing method, the polyurethane board product is manufactured by uniformly mixing the compound polyester polyol, the isocyanate and the compound filler, injecting the mixture into the die and carrying out heat-preservation pressing. The obtained product is high in mechanical performance strength, low in linear shrinkage rate during storage and use, is not easy to warp after long-term storage and high in production and secondary processing precision, does not easily absorb water and can be applied to the field having high requirement on size precision.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam plastic materials, in particular to a polyurethane board and a preparation method thereof. Background technique [0002] Bakelite boards for printed circuit board drilling rigs are phenolic paper laminated boards or epoxy glass fiber laminated boards, which are made of paper or glass fiber cloth impregnated with phenolic resin or epoxy resin, baked and hot pressed. The process is complicated, high-temperature curing molding is required, the processing time is long and the cost is high, and the investment cost of the entire production line is also very high. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a polyurethane board and its preparation method, aiming to solve the current problems of high processing cost, cumberso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/73C08G18/75C08G18/76C08G18/48C08J9/14C08L75/08C08L97/02C08K13/04C08K7/14C08K7/06C08K7/10C08K7/04C08K3/26C08K3/04C08K3/36C08K3/22C08K3/34B29C43/00
Inventor 欧亚洲张伦强谢仲华刘飞杨柳
Owner 昆山市柳鑫电子有限公司
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