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High-flowability polymide composite

A technology of polyamide composition and thermoplastic polyamide, which is applied in the field of high fluidity polyamide composition, can solve the problems of reduced mechanical properties and large-scale implementation, and achieves low gas content, excellent surface and good machinability Effect

Active Publication Date: 2011-06-15
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this is difficult for general companies, so there is no large-scale implementation in industry so far
[0005] In addition to using low-molecular-weight polyamides as flow modifiers for modified polyamides in the literature, the main examples of flow modifiers used are low-molecular-weight polyesters to improve fluidity (DE-A-4127720), using polar Chain-modified polyolefin waxes (BE-A-820472) or salts of magnesium, zinc and aluminum (WO 97 / 19131) or monovalent or divalent metal salts of aliphatic carboxylic acids (CN 1470565A, CN 1230467C), mainly The disadvantage is that the fluidity is improved, but the mechanical properties are greatly reduced. On the other hand, when using aliphatic metal soap salt flow modifiers, there will be small Molecular fouling occurs (especially for halogen-free flame-retardant polyamide materials), so it is necessary to find other ways to improve flow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A polyamide composition with high fluidity, made of the following raw materials in parts by weight: 100 parts of PA10T / 66, 2 parts of polybutene (PB), 30 parts of round cross-section glass fiber, and 15 parts of brominated polystyrene , 2 parts of zinc borate, 1 part of phenolic antioxidant, 2 parts of dipentaerythritol.

[0042] Preparation method: a. First air-dry polyamide resin and polybutene at 120°C and 80°C for 8 hours;

[0043] b. Mix the dried polyamide, polybutene, brominated polystyrene, zinc borate, phenolic antioxidant and dipentaerythritol uniformly for 5 minutes with a high mixer;

[0044] c. Put the mixed raw materials in step b into the main feeding hopper of the twin-screw extruder, add glass fiber from the side feeding port, melt and extrude, and granulate.

Embodiment 2

[0046] A polyamide composition with high fluidity, made of the following raw materials in parts by weight: 100 parts of PA6T / 66, 5 parts of polybutene (PB), 40 parts of round cross-section glass fiber, phosphinate flame retardant 15 parts, 1 part of zinc borate, 1 part of phenolic antioxidant, 2 parts of dipentaerythritol.

[0047] Preparation method: a. First air-dry polyamide resin and polybutene at 120°C and 80°C for 8 hours;

[0048] b. Mix the dried polyamide, polybutene, phosphinate, zinc borate, phenolic antioxidant and dipentaerythritol evenly for 5 minutes with a high mixer;

[0049] c. Put the mixed raw materials in step b into the main feeding hopper of the twin-screw extruder, add glass fiber from the side feeding port, melt and extrude, and granulate.

Embodiment 3

[0051] A polyamide composition with high fluidity, made of the following raw materials in parts by weight: 100 parts of PA10T, 5 parts of polybutene (PB), 50 parts of round cross-section glass fiber, and 13 parts of phosphinate flame retardant , 1 part of zinc borate, 1 part of phenolic antioxidant, 2 parts of dipentaerythritol.

[0052] Preparation method: a. First air-dry polyamide resin and polybutene at 120°C and 80°C for 8 hours;

[0053] b. Mix the dried polyamide, polybutene, phosphinate, zinc borate, phenolic antioxidant and dipentaerythritol evenly for 5 minutes with a high mixer;

[0054] c. Put the mixed raw materials in step b into the main feeding hopper of the twin-screw extruder, add glass fiber from the side feeding port, melt and extrude, and granulate.

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Abstract

The invention discloses a high-flowability polymide composite which comprises the following components in parts by weight: 100 parts of thermoplasticity polymide, 0.5-10 parts of polybutylene, 15-70 parts of reinforcing material, 10-30 parts of fire retardant and 3-10 parts of other additives, wherein the melting point of the thermoplasticity polymide is 280-330 DEG C, and the relative viscosity of the thermoplasticity polymide is 2.0-2.3. The polymide composite provided by the invention has the advantages of high flowability and good mechanical processing property, and can meet thin wall and multi-cave forming requirements; the content of the gas in the obtained composite is less, the surface of the formed product is good, and raw materials can be obtained easily and are low in price; and the high-flowability polymide composite has a wide market space.

Description

technical field [0001] The present invention relates to polyamide compositions having improved flow properties. In particular, it is a polyamide composition with high fluidity suitable for injection molding of electrical and electronic components. Background technique [0002] With the advancement of technology, electronic components are becoming thinner and more high-performance, so the high-density assembly technology of printed circuit boards (PCB) - surface mount technology (SMT) is becoming more and more popular. The use of lead in traditional solder paste has become increasingly strict, and lead-free solder has been used more and more widely. Therefore, in electronic components, general-purpose engineering plastics polyamide 6 and polyamide 66 are gradually replaced by more temperature-resistant polyamide resins. [0003] Currently commercialized high heat-resistant resins include nylon 46, nylon 6T / 66, nylon 6T / 66, nylon 9T and nylon 10T. In order to further improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L77/06C08L77/02C08L23/20C08K13/04C08K7/14C08K7/06C08K3/34C08K3/22C08K3/38
Inventor 易庆锋陈健龙杰明姜苏俊陈大华
Owner KINGFA SCI & TECH CO LTD
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