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Low water absorption polyamide resin composition

A technology of polyamide resin and low water absorption, which is applied in the field of glass fiber reinforced resin composition, and can solve the problems of poor mechanical properties and low notched impact strength

Inactive Publication Date: 2007-12-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by this invention is the shortcoming of poor mechanical properties (mainly flexural modulus and / or notched impact strength) of glass fiber reinforced polyamide resin composition in the prior art, and a new low water absorption polyamide resin is provided combination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6 and comparative example 1～2

[0020] First, dry the polycaprolactam resin (PA6) in a vacuum oven at 100°C for 6 hours at a vacuum degree lower than -0.1MPa, and dry the SANMA resin in a blast oven at 90°C for 3 hours, then take out the composition ratio according to Table 1 After weighing, add it to a container and mix evenly, and finally add it to the hopper of a twin-screw extruder for later use. The barrel temperature of the twin-screw extruder (German LeistritzCo.Micro27 type) is controlled at 220°C to 250°C from the feed port to the discharge port, under the conditions of the host screw speed of 120 rpm and the feeding screw speed of 35 rpm The above materials are extruded, glass fiber is added from the middle of the cylinder of the twin-screw extruder, and the extruded materials are cooled by water and pelletized to obtain the product, and the production rate is about 12 kg / hour.

Embodiment 7～10

[0036] The same preparation process as Examples 1 to 6, except that a small amount of MBS type or ABS type impact modifier is added in the composition in Examples 7 and 8, and another SANMA resin and SANMA resin are used in Examples 9 and 10. Resin plus ABS type impact modifier. The sample preparation and test method are also the same as before, and the obtained test results are shown in Table 2.

[0037] Table 2 Composition and properties of glass fiber reinforced PA6 / SANMA composition

[0038] Numbering

[0039] As can be seen from the test results in Table 2, adding a small amount of MBS type or ABS type impact modifier to the glass fiber reinforced PA6 / SANMA composition can further improve the notched impact strength of the composition and reduce the water absorption, while the composition's Flexural modulus (rigidity) does not decrease.

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PUM

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Abstract

The invention relates low-specific absorption polyamide resin compound. The invention adds the glass fiber into the PA6 and low-specific absorption and high-rigidity resin compound.

Description

technical field [0001] The invention relates to a polyamide resin composition with low water absorption rate, in particular to a glass fiber reinforced resin composition of polycaprolactam resin and styrene-acrylonitrile-maleic anhydride copolymer. Background technique [0002] Polyamide (referred to as PA, commonly known as nylon) is a general term for a class of polymers whose main chain repeating units contain amide groups. There are many varieties of polyamide, and the varieties with the largest output and widest use are PA6 and PA66. Because polyamide macromolecular chains can form hydrogen bonds through amide groups, polyamide is a partially crystalline polymer with high melting point (high heat resistance), excellent mechanical properties, and chemical resistance. Drug resistance (especially oil resistance) and electrical insulation properties, widely used in automobiles, electrical and electronic, machinery, packaging and other industries. However, polyamide also h...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K7/14C08K9/06
Inventor 傅荣政
Owner CHINA PETROLEUM & CHEM CORP
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