PET fiber hybrid glass fiber reinforced unsaturated polyester resin bulk molding compound and preparation method thereof

A technology of bulk molding compound and polyester resin, which is applied in the field of PET fiber mixed glass fiber reinforced unsaturated polyester resin bulk molding compound and its preparation, which can solve the problems of poor impact strength, strength loss, and fluidity of BMC mass It can achieve the effects of excellent crack resistance and impact resistance, improved impact strength, and improved mechanical properties

Pending Publication Date: 2020-11-17
广东百汇达新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low glass fiber content and low strength of BMC, the BMC rapid prototyping process is easy to crack and has poor impact strength. It is only suitable for the manufacture of products with generally small sizes and general strength requirements. Not enough to cause cracking problem
At present, the main solution to the insufficient impact strength of BMC and the easy cracking of products is to increase the glass fiber content of BMC aggregates, increase PE powder auxiliary materials, etc.
However, the disadvantage of adopting the technical solution of increasing the glass fibe

Method used

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  • PET fiber hybrid glass fiber reinforced unsaturated polyester resin bulk molding compound and preparation method thereof
  • PET fiber hybrid glass fiber reinforced unsaturated polyester resin bulk molding compound and preparation method thereof
  • PET fiber hybrid glass fiber reinforced unsaturated polyester resin bulk molding compound and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The formula of PET fiber mixed glass fiber reinforced unsaturated polyester molding compound is as follows: BMC unsaturated polyester resin 22kg, low shrinkage agent 14kg, 15% BHT (2,6-di-tert-butyl p-cresol) styrene solution (containing Mass concentration is the styrene solution of 15% BHT) polymerization inhibitor 0.4kg, 98% purity TBPO (tert-butyl peroxide 2-ethylhexanoate) curing agent 1kg, release agent zinc stearate 2.2kg, Calcium carbonate 60kg, aluminum hydroxide 82kg, 3mm chopped glass fiber 14kg, chopped 3mm PET fiber 3kg.

[0050] The above-mentioned PET fiber mixed glass fiber reinforced unsaturated polyester molding compound (BMC) preparation method comprises the following steps:

[0051] (1) Pour calcium carbonate and aluminum hydroxide into the Σ kneader, the kneader speed is 40rpm / min, and the mixing time is 3min to obtain a pre-mixed uniform filler;

[0052] (2) Pour BMC unsaturated polyester resin, low shrinkage agent, 15% BHT styrene solution polymer...

Embodiment 2

[0056] The formula of PET fiber mixed glass fiber reinforced unsaturated polyester molding compound is as follows: BMC unsaturated polyester resin 20kg, low shrinkage agent 13kg, 15% BHT (2,6-di-tert-butyl p-cresol) styrene solution (containing Mass concentration is the styrene solution of 15% BHT) polymerization inhibitor 0.2kg, 98% purity TBPO (tert-butyl peroxide 2-ethylhexanoate) curing agent 0.2kg, release agent zinc stearate 1.6kg , calcium carbonate 54kg, aluminum hydroxide 90kg, 3mm chopped glass fiber 16kg, chopped 6mm PET fiber 2kg.

[0057] The above-mentioned PET fiber mixed glass fiber reinforced unsaturated polyester molding compound (BMC) preparation method comprises the following steps:

[0058] (1) Pour calcium carbonate and aluminum hydroxide into the Σ kneader, the kneader speed is 30rpm / min, and the mixing time is 4min to obtain a pre-mixed uniform filler;

[0059] (2) Pour BMC unsaturated polyester resin, low shrinkage agent, 15% BHT styrene solution poly...

Embodiment 3

[0063] The formula of PET fiber mixed glass fiber reinforced unsaturated polyester molding compound is as follows: BMC unsaturated polyester resin 24kg, low shrinkage agent 15kg, 15% BHT (2,6-di-tert-butyl p-cresol) styrene solution (containing Mass concentration is the styrene solution of 15% BHT) polymerization inhibitor 0.4kg, 98% purity TBPO (2-ethyl peroxide tert-butyl hexanoate) curing agent 0.4kg, release agent zinc stearate 2.4kg , calcium carbonate 60kg, aluminum hydroxide 76kg, 3mm chopped glass fiber 16kg, chopped 3mm PET fiber 4kg.

[0064] The above-mentioned PET fiber mixed glass fiber reinforced unsaturated polyester molding compound (BMC) preparation method comprises the following steps:

[0065] (1) Pour calcium carbonate and aluminum hydroxide into the Σ kneader, the kneader speed is 50rpm / min, and the mixing time is 3min to obtain a pre-mixed uniform filler;

[0066] (2) Pour BMC unsaturated polyester resin, low shrinkage agent, 15% BHT styrene solution pol...

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Abstract

The invention discloses a PET fiber hybrid glass fiber reinforced unsaturated polyester resin bulk molding compound which comprises the following components in parts by weight: 80-150 parts of BMC unsaturated polyester resin, 60-80 parts of a low shrinkage agent, 0.5-5 parts of a polymerization inhibitor, 0.5-10 parts of a curing agent, 8-15 parts of a release agent, 260-350 parts of calcium carbonate, 100-450 parts of aluminum hydroxide, 60-90 parts of chopped glass fibers and 5-30 parts of chopped PET fibers. The tensile strength and the impact property of the BMC prepared by mixing the PETfibers with the glass fibers are equivalent to those of the BMC prepared from pure glass fibers, the bending strength is improved, the glossiness of the product is well kept, and the problems that a plastic package BMC product is low in bending strength, high in brittleness and prone to cracking are solved.

Description

technical field [0001] The invention belongs to the field of chemical composite materials, and in particular relates to a PET fiber mixed glass fiber reinforced unsaturated polyester resin bulk molding compound and a preparation method thereof. Background technique [0002] Bulk molding compound—Bulk (Dough) molding comounds referred to as BMC (also known as DMC), mainly composed of unsaturated polyester resin (UP), anti-shrinkage agent (LPA), chopped glass fiber (GF), mineral filler and curing agent The fiber-reinforced unsaturated resin-based prepreg obtained by fully mixing and uniformly adding other additives through a kneader. BMC (DMC) materials were first used in production in Germany in the 1960s, and then popularized and applied in the United States and Japan in the 1970s and 1980s. Due to the limitations of large shrinkage of the reinforced matrix unsaturated resin (UP) after curing, the early bulk molding compounds lead to poor stability of the product, which gre...

Claims

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Application Information

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IPC IPC(8): C08L67/06C08L67/02C08K13/04C08K7/14C08K3/26C08K5/098C08K3/22C08K5/14C08J5/04
CPCC08J5/043C08J5/046C08J2367/06C08J2467/02C08K13/04C08K7/14C08K2003/265C08K5/098C08K2003/2227C08K2201/003C08K5/14
Inventor 林昌炳江林鹤余桐柏黄贵明梁燕萍
Owner 广东百汇达新材料有限公司
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