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Hot melt adhesive for PVC-U winding pipe and preparation method and application thereof

A PVC-U, hot-melt adhesive technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the difficulty in meeting the bonding requirements of PVC-U winding pipes and the sealing of PVC-U winding pipes Problems such as difficulty in sex and affecting health, achieve superior compatibility, enhanced hardness and rigidity, and low production costs

Inactive Publication Date: 2018-10-12
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVC glue sealing has the following problems: (1) PVC glue is a fully transparent liquid glue, which is flammable and must be stored in a cool place. It should also be kept ventilated and kept away from fire sources when used. After the glue is used, it should be sealed at any time to prevent solvent volatilization or glue solidified
Among them, the polyvinyl chloride resin contained in PVC glue is not toxic in itself, but it can release carcinogenic vinyl chloride gas under high temperature environment.
Therefore, using PVC glue to bond PVC sheets does not conform to the theme of "green environmental protection" that our country is vigorously advocating now, and it also affects people's health
(3) Using PVC glue to bond PVC-U pipes cannot be applied continuously and the sealing is not good enough, the distribution is uneven, easy to cause stress concentration, easy to seepage, especially difficult to meet the large-caliber (diameter ≥ DN650NPS 26 inches) PVC- Bonding requirements for U winding pipes
[0004] For solving PVC-U plastic pipe, especially the technical problem that the tightness of large-diameter (diameter ≥ DN650NPS 26 inches) PVC-U winding pipe is difficult, the present invention proposes to adopt modified hot-melt adhesive to seal the PVC-U plastic pipe interface. The pipeline is sealed to achieve good sealing, high durability, easy operation, green environmental protection, and effectively improve the sealing of the pipeline

Method used

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  • Hot melt adhesive for PVC-U winding pipe and preparation method and application thereof
  • Hot melt adhesive for PVC-U winding pipe and preparation method and application thereof
  • Hot melt adhesive for PVC-U winding pipe and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1: Compatibility and thermogravimetric analysis experiment

[0068] Weigh according to the following weight ratio, TPU / PVC=8:1, TPU / PVC / 138 rosin resin=8:1:0.5, TPU / PVC / 138 rosin resin / NanoCaCO 3 =8:1:0.5:0.5, the respectively weighed mixture is packed in a beaker, and add 0.1% antioxidant 1010, 0.1% antioxidant 168 of total weight, pour in the internal mixer after mixing, Set the number of revolutions to 30rpm, and the temperature to 150°C. After banburying for 5 minutes, stop banburying. Then use a copper shovel to scrape off the banburying product, put it on a polytetrafluoroethylene plate to cool to room temperature (15-25°C), and put it into a sealed bag with a label for later use.

[0069] (1) Fourier transform infrared spectroscopy (FTIR) analysis

[0070] First, the hot melt adhesive sample to be tested is pressed into a light-transmitting film on a hot press, and the hot pressing temperature is the mixing temperature of the hot melt adhesive (150°C...

Embodiment 2-6

[0080] Embodiment 2-6: TPU / PVC Optimum Proportion Experiment

[0081] A preparation method of hot melt adhesive for PVC-U winding pipe, the steps are:

[0082] A. Weigh thermoplastic polyurethane and polyvinyl chloride respectively according to the weight ratio in Table 1, put them into a beaker, add antioxidant 1010 and antioxidant 168, mix well, and pour them into the internal mixer;

[0083] B. Set the rotation speed of the internal mixer to 30rpm / min, the temperature to 150°C, and stop the internal mixing after 5 minutes;

[0084] C. Scrape off the banburying product with a copper shovel, put it on a polytetrafluoroethylene plate to cool to room temperature (15-25°C), and then put it in a sealed bag with a label for later use to obtain hot melt adhesive samples A2-A6 .

[0085] Table 1 Embodiment 2-6 raw material ratio table

[0086]

Example 2

Example 3

Example 4

Example 5

Example 6

Thermoplastic Polyurethane (wt%)

83.2

85.5

...

Embodiment 7-11

[0093] Embodiment 7-11: 138 rosin resin optimal addition experiment

[0094] Weigh thermoplastic polyurethane (TPU), polyvinyl chloride (PVC), 138 rosin resin (rosin) respectively according to the weight ratio in Table 3, put into a beaker, add antioxidant 1010 and antioxidant 168, mix well , into the internal mixer;

[0095] Other steps were the same as in Example 2 to obtain samples A7-A11 of hot melt adhesive for PVC-U winding pipes.

[0096] Table 3 Embodiment 7-11 raw material ratio table

[0097]

Example 7

Example 8

Example 9

Example 10

Example 11

Thermoplastic Polyurethane (wt%)

87.8

86

85.2

84.3

83.4

Polyvinyl chloride (wt%)

11

10.8

10.6

10.5

10.4

138 Rosin resin (wt%)

1

3

4

5

6

Antioxidant 1010(wt%)

0.1

0.1

0.1

0.1

0.1

Antioxidant 168(wt%)

0.1

0.1

0.1

0.1

0.1

[0098] Leave the samples A7, A8, A9, A10, and A11 to cool for mo...

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Abstract

The invention discloses hot melt adhesive for PVC-U winding pipe and a preparation method and application thereof. The hot melt adhesive is composed of thermoplastic polyurethane, polyvinyl chloride,138 rosin resin, nano CaCO3 and an antioxygen according to certain proportions. The preparation method comprises the steps that A, the thermoplastic polyurethane, the polyvinyl chloride, the 138 rosinresin and the nano calcium carbonate are respectively weighed and placed in a beaker, the antioxygen is added, and the mixture is mixed uniformly and poured in an internal mixer; B, the revolution ofthe internal mixer is set as 25-30 rpm / min, a certain temperature is controlled, and after the controlled certain banburying time, banburying stops; C, the banburying product is scraped by using a copper shovel, put on a polytetrafluoroethylene board for cooling, and put in a sealing bag with a label for standby application, and the hot melt adhesive for the PVC-U winding pipe is obtained. The invention further relates to application of the hot melt adhesive in sealing adhesion of the PVC-U winding pipe. The formula is reasonable, the method is simple, and the glue has good adhesive performance and good affinity with PVC board materials, is waterproof, has good corrosion resistance performance and good sealing performance, can replace traditional PVC glue, and has a good adhesive effect especially on PVC-U winding pipes with large diameters.

Description

technical field [0001] The present invention relates to the field of adhesives, more specifically to a hot-melt adhesive for PVC-U winding pipes, and also to a preparation method for hot-melt adhesives for PVC-U winding pipes, and to a hot-melt glue for PVC-U winding pipes. Glue use. Background technique [0002] As one of the most widely used polymer thermoplastics, polyvinyl chloride (PVC) ranks second in terms of factory output and daily usage. The vigorous development of the PVC industry has made a great contribution to improving the living standards of our people. Therefore my country's development of PVC industry has very obvious benefits. According to the statistics of PVC-U plastic pipe manufacturers in my country, compared with metal pipes, PVC-U plastic pipes have a better energy-saving effect, saving more than 50%. [0003] With the increasing demand for polymer plastic pipes in the building materials market, PVC-U plastic pipes have been widely used due to their...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J127/06C09J193/04C09J11/04C09J11/06
CPCC08K2003/265C08K2201/011C08L2203/18C08L2205/03C09J11/04C09J11/06C09J175/04C08L27/06C08L93/04C08K13/02C08K5/1345C08K5/526C08K3/26
Inventor 李盛彪刘潇潇李峰胡小妹马莹肖元曦杨永娇陈小青程丽
Owner HUAZHONG NORMAL UNIV
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