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Caking agent

A technology of adhesives and viscosity modifiers, which can be used in adhesives and other directions to solve problems such as low temperature resistance

Inactive Publication Date: 2008-12-03
SHANGHAI SHANGFENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the special requirements of the production process (five-layer co-extrusion once molding), many enterprises can only choose to produce PP-R / AL / PP-R pipes with low temperature resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Three types of polypropylene (PP-R) / heat-resistant polyethylene (PE-RT) / dicumyl peroxide (DCP) / viscosity regulator (paraffin) / tackifying resin (pine) / malay Anhydride (MAH) according to the ratio of 27 / 23 / 0.05 / 40 / 9 / 0.95, its peel strength with aluminum foil is 132N;

Embodiment 2

[0014] Three types of polypropylene (PP-R) / heat-resistant polyethylene (PE-RT) / dicumyl peroxide (DCP) / viscosity regulator (paraffin) / tackifying resin (pine) / malay Anhydride (MAH) according to the ratio of 28.5 / 21.5 / 0.05 / 40 / 9 / 0.95, its peel strength with aluminum foil is 135N;

Embodiment 3

[0016] Three types of polypropylene (PP-R) / heat-resistant polyethylene (PE-RT) / dicumyl peroxide (DCP) / viscosity regulator (paraffin) / tackifying resin (pine) / malay Anhydride (MAH) according to the ratio of 30 / 20 / 0.05 / 40 / 9 / 0.95, its peel strength with aluminum foil is 137N;

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Abstract

The invention relates to an adhesive, which consists of, by weight percentage, polypropylene-random 27 to 33 percent, heat-resistant polyethylene 17 to 23 percent, diisopropylbenzene peroxide 0.04 to 0.06 percent, viscosity regulator 39 to 41 percent, tackifying resin 8.5 to 9.5 percent and maleic anhydride 0.75 to 1.15 percent. The adhesive has the advantages that the adhesive can meet the adhesion requirement for PP-R / AL / PE-RT as well as the adhesion requirement for PP-R / AL / PP-R tubes.

Description

technical field [0001] The invention relates to an adhesive, in particular to an adhesive used on an outer-layer fusion-bonded aluminum-plastic composite pipe for hot water. Background technique [0002] The outer layer welded aluminum-plastic composite pipe for hot water is divided into inner and outer layer materials: random copolymerized polypropylene / aluminum alloy / heat-resistant polyethylene (PP-R / AL / PE-RT) and random copolymerized polypropylene / aluminum Alloy / random copolymer polypropylene (PP-R / AL / PP-R). Among them, the long-term working conditions of PP-R / AL / PE-RT pipes are 82°C and 1.0Mpa, while the long-term working conditions of PP-R / AL / PP-R pipes are 70°C and 1.0Mpa. Because both are used in hot water system, the safety of PP-R / AL / PE-RT piping system is higher. [0003] The outer layer of welded aluminum-plastic composite pipe is a five-layer composite structure. The inner heat-resistant layer is made of type III polypropylene (PP-R) or heat-resistant polyethyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/12C09J123/06
Inventor 叶纶
Owner SHANGHAI SHANGFENG GROUP
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