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Solvent composition for dissolving plastics

A solvent composition and composition technology, applied in the direction of non-surface active washing solvents, etc., can solve problems such as hazards and flammability

Inactive Publication Date: 2008-01-23
KANEKO KAGAKUKK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still concerns about environmental hazards or somewhat flammability due to the presence of organic solvents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6、 comparative example 1～5

[0021] As Examples 1 to 6 and Comparative Examples 1 to 5, solutions containing NPB and nitroethane were prepared using the compositions described in Table 1, respectively. Regarding Examples 1 to 6 and Comparative Examples 1 to 5, the dissolving power of polyester resin, plastic detergency and flammability were investigated respectively. The results are shown in Table 1.

[0022] In order to measure the dissolving power of the solvent of the present invention in a polyester resin, a wound electric wire (wire diameter: 35 μm) covered with a polyester self-melting layer (covering thickness: 2 μm) was used. Since the wound electric wire is fixed by the self-melting adhesive layer, it cannot be untied in a normal state, but once the self-melting adhesive layer is dissolved, the fixation will come off and it can be untied. For this electric wire, use the solvent of the present invention to rinse at normal temperature for a certain period of time, and study how much the electric w...

Embodiment 7～12、 comparative example 6～9

[0029] Next, as a nitroalkane, in order to study whether the same result can be obtained by using nitromethane instead of the nitroethane used in the above-mentioned Examples 1 to 6, etc., a solvent having a composition as described in Table 2 was prepared, and the same process was carried out. test. The results are shown in Table 2.

[0030] 【Table 2】

[0031]

NPB

Nitromethane

polyester resin

Solution

plastic

Detergency

flammability

Comparative example 6

95

5

×

◎

none

Comparative Example 7

90

10

○

◎

none

Example 7

85

15

○

◎

none

Example 8

80

20

○

◎

none

Example 9

75

25

◎

◎

none

Example 10

70

30

◎

◎

none

Example 11

65

35

...

Embodiment 13～18、 comparative example 10～13

[0035] Next, in order to examine whether the same results could be obtained by using IPB instead of NPB used in Examples 1 to 6, etc., solvents having the compositions described in Table 3 were prepared and the same test was carried out. The results are shown in Table 3.

[0036] 【table 3】

[0037]

IPB

Nitroethane

polyester resin

Solution

plastic

Detergency

flammability

Comparative Example 10

100

0

×

◎

none

Comparative Example 11

95

5

×

◎

none

Comparative Example 12

90

10

○

◎

none

Example 13

85

15

○

◎

none

Example 14

80

20

○

◎

none

Example 15

75

25

◎

◎

none

Example 16

70

30

◎

◎

none

Example 17

...

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PUM

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Abstract

The present invention provides a solvent composition comprises isopropyl bromide and / or normal propyl bromide and one or two or more kinds of nitroalkane in an amount of 15-40 wt.% based on the whole amount.

Description

technical field [0001] The present invention relates to a new solvent composition for dissolving plastics, which replaces conventionally used fluorine-based or chlorine-based solvent compositions. Background technique [0002] Conventionally, fluorine-based or chlorine-based solvent compositions have been frequently used as solvent compositions for dissolving plastics. However, in recent years, the use of fluorine-based and chlorine-based solvents has caused serious damage to the environment, and regulations for their use have become increasingly stringent. Due to this fact, in recent years, as new solvent compositions replacing fluorine-based or chlorine-based solvent compositions, several types of solvent compositions based on brominated hydrocarbons such as 2-bromopropane (hereinafter referred to as IPB), 1-bromopropane ( Hereinafter referred to as NPB) etc. as the main component of the solvent. As such a solvent, for example, JP-A-8-337795 (JP-A-8-85268) discloses a wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/32C11D7/50
Inventor 早川隆范金子旻又
Owner KANEKO KAGAKUKK
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