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Polyacetal resin composition and its production method

A technology of polyacetal resin and composition, which is applied in the field of polyacetal resin composition and its manufacture, can solve the problems of lack of activity, insufficient adhesion, lack of activity of polyacetal resin, etc., and achieve excellent creep properties, high intensity effect

Active Publication Date: 2018-09-21
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, polyacetal resin lacks activity, and glass-based inorganic fillers also lack activity. Therefore, when only glass-based inorganic fillers are mixed with polyacetal resins and melt-kneaded, the adhesion between the two becomes insufficient. , in many cases, the expected degree of improvement in mechanical properties cannot be obtained

Method used

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  • Polyacetal resin composition and its production method
  • Polyacetal resin composition and its production method
  • Polyacetal resin composition and its production method

Examples

Experimental program
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Effect test

preparation example Construction

[0042] The preparation method of (A1) component is not specifically limited, It can prepare using a well-known method.

[0043] [(A2) Polyacetal resin having a branched or cross-linked structure]

[0044] Although not essential, (A) polyacetal resin may contain (A2) polyacetal resin which has a branched or crosslinked structure. The component (A2) is obtained by further adding a compound capable of copolymerizing with formaldehyde, paraformaldehyde, etc., and forming a branched chain unit or a crosslinking unit through the copolymerization to the raw materials used in the production of the component (A1), and copolymerizing, thereby get.

[0045] For example, by further adding a substituent monofunctional glycidyl compound (such as phenyl glycidyl ether, butyl glycidyl ether, etc.) polyacetal resin. Moreover, the polyacetal resin which has a crosslinked structure can be obtained by adding and copolymerizing a polyfunctional glycidyl ether compound to (A11) component and (A1...

Embodiment 1～6、 comparative example 1～3

[0095] When using glass fiber etc. as (B) glass-based inorganic filler

[0096] First, in order to provide a polyacetal resin composition having high strength, excellent hot water resistance, and excellent creep characteristics, a case where a polyacetal resin composition is obtained using glass fiber or the like as (B) glass-based inorganic filler will be described.

[0097] [table 3]

[0098]

[0099] In Table 3, each component is as follows.

[0100] (A1) Polyacetal resin having a substantially linear molecular structure

[0101] (A1a), (A1b), (a1a) and (a1b) obtained in above

[0102] (A2) Polyacetal resin having a branched or crosslinked structure

[0103] (A2a) obtained in the above

[0104] (B) Glass-based inorganic filler

[0105] (B1) Glass fiber CS03MA409B (manufactured by Owens Corning Corporation)

[0106] (C) Trifunctional isocyanate compound

[0107] Isophorone diisocyanate trimer Vestanat T1890 / 100 (manufactured by Degussa Japan Co., Ltd.)

[0108] ...

Embodiment 7、8、 comparative example 4

[0122] When using glass beads etc. as (B) glass-based inorganic filler

[0123] Next, in order to provide the polyacetal resin composition which contributes to reduction of anisotropy, the case where the polyacetal resin composition is obtained using glass beads etc. as (B) glass-type inorganic filler is demonstrated.

[0124] [table 5]

[0125]

[0126] In Table 5, glass beads EGB731B (manufactured by Potters-Ballotini Co., Ltd.) were used as the (B) glass-based inorganic filler. Other components are the same as in Example 1 above.

[0127] To the polyacetal resin described in Table 5, the (B2) component, (C) component, (D) component and (E) component described in Table 3 were added according to the ratio shown in Table 5, and the cylinder temperature was adjusted to Melt-kneading was carried out in an extruder at 200° C. to prepare granular polyacetal resin compositions of Examples 7 and 8 and Comparative Example 4.

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Abstract

To provide a polyacetal resin composition capable of satisfying demands for higher levels and various mechanical properties as the fields of use of polyacetal resins expand. The polyacetal resin composition of the present invention contains: (A) 30% to 95% by weight of polyacetal resin, (B) 5% to 50% by weight of glass-based inorganic filler subjected to silane coupling treatment, (C) 0.1% by weight to 10% by weight of a trifunctional isocyanate compound, and (D) 0.01% by weight to 0.5% by weight of a nitrogen compound having formaldehyde reactivity. When the component (B) is glass fibers or the like, the tensile strength is 120 MPa or more, and when the component (B) is glass beads or the like, the tensile strength is 60 MPa or more. This resin composition is obtained by mixing other components with (A) component which pre-dried until the moisture content became 1000 ppm or less.

Description

technical field [0001] The present invention relates to a polyacetal resin composition and a method for producing the same. Background technique [0002] Polyacetal resins have excellent properties in terms of mechanical properties, thermal properties, electrical properties, sliding properties, moldability, and dimensional stability of molded products, and are widely used as structural materials and mechanical parts in electrical equipment, automotive parts, and precision machinery parts etc. Furthermore, in order to improve the mechanical properties of polyacetal resins, such as strength and rigidity, it is known to mix reinforcing materials such as glass-based inorganic fillers. [0003] However, polyacetal resin lacks activity, and glass-based inorganic fillers also lack activity. Therefore, when only glass-based inorganic fillers are mixed with polyacetal resins and melt-kneaded, the adhesion between the two becomes insufficient. , in many cases, the expected degree of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L59/04C08G2/18C08K5/29C08K5/3492C08K5/56C08K7/00C08K9/06
CPCC08G2/18C08K9/06C08L59/04C08G2/10C08G4/00C08G18/56C08J5/043C08G18/792C08J5/08C08J2359/02
Inventor 霜田晓英中田德美
Owner POLYPLASTICS CO LTD
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