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Low-temperature resistant flexile PVC modified material and method for making same

A modified material and low temperature resistant technology, applied in the field of low temperature resistant flexible PVC modified materials and their preparation, which can solve problems such as difficulty in meeting design requirements, installation difficulties, and influence on glass clamping force.

Active Publication Date: 2008-05-14
NINGBO TAIYONG AUTOMOTIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this approach solves the problem of difficult installation in low-temperature seasons, it also brings serious shortcomings due to the fact that the material itself still has the characteristics of a large change in hardness with temperature.
The specific disadvantage is: the reduction of material hardness affects the clamping force of the product on the glass, especially in summer, the material will become softer and the clamping force will be smaller, and there is a risk of seal failure when driving at high speed! The existence of this technical risk makes it difficult for this practice to meet the design requirements of this type of product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The weight percentage of PVC modified material is composed of:

[0035] PVC-K70 43%

[0036] PVC-ACR50% 14%

[0037] Ca / Zn stabilizer 1.5%

[0038] DOP 18.6%

[0039] TOTM 3%

[0040] ESO 3%

[0041] P551 1.2%

[0042] TPU 58213 13.8%

[0043] Polyethylene wax 0.3%

[0044] Stearic acid 0.3%

[0045] UV-2908 0.2%

[0046] UV-531 0.2%

[0047] Irganox 1076 0.3%

[0048] Carbon Black Cabot 800 0.6%.

[0049] The performance test results are as follows:

[0050]

project

Test Method / Standard

indicators

Measured value (unit same as

index item)

Hardness (15s)

ASTMD2240

90- / +3A

92

Tensile Strength

ASTMD412A

Above 18MPa

21

Elongation

ASTMD412A

250% or more

278％

density

ASTMD792

1.20-1.45

1.29

Weather resistance (2500kj / m 2 )

SAEJ1960

ΔE≤3

2.4

Change rate of cold resistance softness R

GB / T5564-1994

≤50％

44...

Embodiment 2

[0054] The weight percentage of PVC modified material is composed of:

[0055] PVC-K70 36%

[0056] PVC-ACR50% 20%

[0057] Ca / Zn stabilizer 1.5%

[0058] DOP 18.6%

[0059] TOTM 3%

[0060] ESO 3%

[0061] P551 1.2%

[0062] TPU 58213 14.8%

[0063] Nano Calcium Carbonate 5%

[0064] Polyethylene wax 0.3%

[0065] Stearic acid 0.3%

[0066] UV-2908 0.2%

[0067] UV-531 0.2%

[0068] Irganox 1076 0.3%

[0069] Carbon Black Cabot 800 0.6%.

[0070] The performance test results are as follows:

[0071]

project

Test Method / Standard

indicators

Measured value (unit is the same as

shown in the index item)

Hardness (15s)

ASTMD2240

90- / +3A

91

Tensile Strength

ASTMD412A

Above 18MPa

19.6

Elongation

ASTMD412A

250% or more

269％

density

ASTMD792

1.20-1.45

1.31

Weather resistance (2500kj / m 2 )

SAEJ1960

ΔE≤3

2.1

Change rat...

Embodiment 3

[0075] The weight percentage of PVC modified material is composed of:

[0076] PVC-K70 52%

[0077] PVC-ACR50% 11%

[0078] Ca / Zn stabilizer 1.5%

[0079] DOP 18.6%

[0080] TOTM 3%

[0081] ESO 3%

[0082] P551 1.2%

[0083] TPU 58213 7.8%

[0084] Polyethylene wax 0.3%

[0085] Stearic acid 0.3%

[0086] UV-2908 0.2%

[0087] UV-531 0.2%

[0088] Irganox 1076 0.3%

[0089] Carbon Black Cabot 800 0.6%.

[0090] The performance test results are as follows:

[0091]

project

Test Method / Standard

indicators

Measured value (unit is the same as

shown in the index item)

Hardness (15s)

ASTMD2240

90- / +3A

91

Tensile Strength

ASTMD412A

Above 18MPa

18.6

Elongation

ASTMD412A

250% or more

277％

[0092] density

ASTMD792

1.20-1.45

1.28

Weather resistance (2500kj / m 2 )

SAEJ1960

ΔE≤3

2.6

Change rate of cold resista...

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Abstract

The invention discloses a low temperature resistant flexible PVC modified material and the preparation method, which is characterized in that: according to the calculation of weight percentage, the material is formed through mixing 36 to 52% of polyvinyl chloride, 11 to 20% of vinyl chloride grafting polyacrylate, 7.5 to 17 % of polyurethane and the rest of additive agent. The preparation method mainly comprises steps of mixing material and extrusion pelletizing; wherein, the polyurethane is added into a blending system during extruding process, so little change exists for hardness of PVC modified materials within used temperature range of material. The invention has the advantages of enough hardness, adequate toughness and especially suitability for making clamping strip of automobile windshield.

Description

technical field [0001] The invention relates to the field of PVC modified materials, in particular to a low-temperature-resistant flexible PVC modified material and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is the second most general-purpose resin in the world, and its application is very extensive. Nevertheless, for ordinary PVC materials, some deficiencies still affect its application. For example, the flexibility of ordinary PVC materials is very sensitive to changes in temperature. Materials that can be used normally at room temperature will become hard and cannot be used normally at low temperatures. An obvious example of this is the clamping strips for car windshields in the automotive industry. [0003] The clamping strips of automobile windshields are usually made of PVC material. Moreover, for the consideration of increasing the flexibility of the PVC material, it is usually made of a modified PVC material. The usual pra...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K5/10C08L51/06C08L75/04C08K3/26
Inventor 胡益男叶敏蒋奇斌
Owner NINGBO TAIYONG AUTOMOTIVE PARTS
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