Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of damp-heat-resistant unsaturated polyester molding compound

An unsaturated, moisture-resistant technology, applied in the field of polymer composite materials, can solve the problems of poor moisture-heat resistance, achieve excellent moisture-heat resistance and processing performance, excellent moisture-heat performance, and improve solubility

Inactive Publication Date: 2020-11-27
GUILIN ZHILONG ELECTRICAL EQUIP
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor moisture and heat resistance in the current dry unsaturated polyester molding compound, and to provide a preparation method for the moisture and heat resistant unsaturated polyester molding compound

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of damp-heat-resistant unsaturated polyester molding compound
  • Preparation method of damp-heat-resistant unsaturated polyester molding compound
  • Preparation method of damp-heat-resistant unsaturated polyester molding compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] To prepare the heat and humidity resistant unsaturated polyester molding compound, the specific steps are:

[0035] (1) Preparation of heat and humidity resistant unsaturated polyester molding resin:

[0036] (1.1) Prepare Ph-BPA 172kg, saturated dibasic acid isophthalic acid 166kg, unsaturated dibasic acid fumaric acid 116kg, glycol neopentyl glycol 104kg and propylene glycol 50kg, catalyst monobutyltin oxide 3.5 kg, polymerization inhibitor hydroquinone 1kg;

[0037] (1.2) Put 166kg of saturated dibasic acid isophthalic acid, 104kg of diol neopentyl glycol, 50kg of propylene glycol, and 3.5kg of catalyst monobutyltin oxide into the reactor, blow in nitrogen, stir evenly and Raise the temperature to 180-230°C for esterification reaction. When the water output of the reactor reaches 50-60% of the theoretical water output, the reaction is completed and the temperature is lowered;

[0038] (1.3) When the temperature of the reactants drops to 120-160°C, add 116kg of unsa...

Embodiment 2

[0046] To prepare the heat and humidity resistant unsaturated polyester molding compound, the specific steps are:

[0047] (1) Preparation of moisture and heat resistant unsaturated polyester mold resin:

[0048] (1.1) Prepare Ph-BPA 580kg, saturated dibasic acid isophthalic acid 146kg, unsaturated dibasic acid fumaric acid 116kg, diol ethylene glycol 62kg, catalyst tetrabutyl titanate 3.5kg, polymerization inhibitor Agent hydroquinone 1kg;

[0049] (1.2) Put 146kg of saturated dibasic acid isophthalic acid, 62kg of glycol ethylene glycol and 3.5kg of catalyst tetrabutyl titanate into the reactor, feed nitrogen, stir evenly and heat up to 180-230 The esterification reaction is carried out at ℃. When the water output of the reactor reaches 50-60% of the theoretical water output, the reaction is completed and the temperature is lowered;

[0050](1.3) When the temperature of the reactants drops to 120-160°C, add 116kg of unsaturated dibasic acid fumaric acid, 580kg of Ph-BPA an...

Embodiment 3

[0057] To prepare the heat and humidity resistant unsaturated polyester molding compound, the specific steps are:

[0058] (1) Preparation of moisture and heat resistant unsaturated polyester mold resin:

[0059] (1.1) Prepare Ph-BPA 344kg, saturated dibasic acid terephthalic acid 166kg, unsaturated dibasic acid fumaric acid 135kg, glycol diethylene glycol 65kg and neopentyl glycol 63kg, catalyst unit Butyl tin oxide 5.5kg, polymerization inhibitor hydroquinone 2kg;

[0060] (1.2) Put 166kg of saturated dibasic acid terephthalic acid, 65kg of diethylene glycol and 63kg of neopentyl glycol into the reactor, and 5.5kg of catalyst monobutyltin oxide into the reactor. Nitrogen, stir evenly and heat up to 180-230°C for esterification reaction. When the water output of the reactor reaches 50-60% of the theoretical water output, the reaction is completed and the temperature is lowered;

[0061] (1.3) When the temperature of the reactants drops to 140-160°C, add 135kg of unsaturated...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
acid valueaaaaaaaaaa
softening pointaaaaaaaaaa
acid valueaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a damp-heat-resistant unsaturated polyester molding compound. The preparation method comprises the following steps: preparing damp-heat-resistant unsaturated polyester resin; weighing the following components in percentage by mass: 20-45% of damp-heat-resistant unsaturated polyester resin, 5-15% of a cross-linking agent, 1-5% of an initiator, 0.1-1%of an accelerant, 10-30% of a reinforcing agent and 20-50% of filler, wherein the sum of the mass percentages of the components is 100%; blending the accelerant, an initiator and the cross-linking agent, and stirring at 50-60 DEG C to obtain a uniformly dispersed mixed solution; melting and mixing the obtained mixed solution and other components, and extruding and granulating to obtain the product. According to the preparation method disclosed by the invention, the unsaturated polyester resin is modified by introducing the Ph-BPA; unsaturated polyester resin with moisture and heat resistance is obtained, the optimal ratio of all the raw materials is obtained through experiments, and the temperature of melt mixing and extrusion granulation is controlled, so that the prepared unsaturated polyester molding compound has the characteristics of high thermal deformation temperature, excellent electrical performance and excellent moisture and heat resistance.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a preparation method of a moisture-heat-resistant unsaturated polyester molding compound. Background technique [0002] Dry unsaturated polyester molding compound is obtained by esterification and polycondensation of monomers such as polybasic saturated alcohols, saturated acids and unsaturated acids to obtain polyester resins containing unsaturated groups, and then mixed with crosslinking agents, reinforcing materials and fillers production. This type of plastic can be molded at lower temperature and normal pressure, and at the same time, it will not emit water or other small molecular by-products during curing, and has excellent process performance. In practical applications, unsaturated polyester molding compounds can be directly processed into products. Such products usually have good comprehensive properties, corrosion resistance, flame retardancy and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08K13/04C08K7/14C08K7/28C08K5/098C08K3/26C08F283/01C08F212/12C08G63/52
CPCC08K13/04C08K7/14C08K7/28C08K5/098C08K3/26C08F283/01C08G63/52C08K2003/265C08L2201/08C08L67/06C08F212/12
Inventor 潘冬明刘庆吕建
Owner GUILIN ZHILONG ELECTRICAL EQUIP