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A kind of low-temperature catalytic curing aldol resin system and preparation method thereof

A technology of aldol resin and low-temperature catalysis, which is applied in the field of resin system and its preparation, low-temperature catalytic curing aldol resin system and its preparation, which can solve the problems of large product size shrinkage and high curing temperature, and achieve good molding performance and strong mechanical properties. Performance, effect of increasing density

Active Publication Date: 2019-05-21
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to avoid the use of a highly toxic catalytic curing agent and solve the problem of large shrinkage of the product size after curing caused by the high curing temperature of the existing aldol resin, the present invention provides a method for catalytic curing aldol resin system at low temperature

Method used

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  • A kind of low-temperature catalytic curing aldol resin system and preparation method thereof
  • A kind of low-temperature catalytic curing aldol resin system and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A kind of low-temperature catalytic curing aldol resin system, its proportion by weight is:

[0025] Resin prepolymer: 95 parts, catalytic curing agent: 5 parts.

[0026] The preparation method of described low-temperature catalytic curing aldol resin system mainly comprises the following steps:

[0027] (1) Pretreatment of the resin prepolymer: first preheat the resin prepolymer in an oven at a temperature of 45°C, then pass through a 200-mesh screen to remove large particle aggregates, and then put the resin prepolymer under vacuum conditions Down treatment for more than 30min, vacuum degree ≤ -0.090Mpa, temperature 55°C, so as to remove small molecular components, and set aside;

[0028] (2) Water removal treatment of catalytic curing agent: Treat the catalytic curing agent under vacuum conditions for more than 30 minutes, the vacuum degree is ≤ -0.090Mpa, and the temperature is 55°C to remove water molecules in it, and set aside.

[0029] (3) Preparation of low-te...

Embodiment 2

[0035] A kind of low-temperature catalytic curing aldol resin system, its proportion by weight is:

[0036] Resin prepolymer: 96 parts, catalytic curing agent: 4 parts.

[0037] The preparation method is the same as in Example 1.

[0038] The various indicators of the obtained cured product are as follows:

[0039] (1) The viscosity of the material changes as figure 2 , the initial viscosity is 1789 centipoise, and the viscosity after curing for 1h, 2h, 3h and 4h is 2901 centipoise, 4708 centipoise, 8016 centipoise and 13750 centipoise respectively;

[0040] (2) Mechanical properties: tensile strength 61.34MPa, tensile modulus 6.66Gpa, elongation at break 2.40%;

Embodiment 3

[0042] A kind of low-temperature catalytic curing aldol resin system, its proportion by weight is:

[0043] Resin prepolymer: 97 parts, catalytic curing agent: 3 parts.

[0044] The preparation method is the same as in Example 1.

[0045] The various indicators of the obtained cured product are as follows:

[0046] (1) The viscosity of the material changes as figure 2 , the initial viscosity is 1677 centipoise, after curing for 1h, 2h, 3h, 4h, 5h, 6h, the viscosity is 1826 centipoise, 2092 centipoise, 2332 centipoise, 2609 centipoise, 2913 centipoise, 3260 centipoise;

[0047] (2) Mechanical properties: tensile strength 58.59MPa, tensile modulus 4.60Gpa, elongation at break 1.29%.

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Abstract

The invention discloses a low-temperature catalytic curing aldol resin system. The low-temperature catalytic curing aldol resin system is prepared from the following components in parts by weight: 90 to 99 parts of resin prepolymer, and 1 to 10 parts of catalytic curing agent. The invention also provides a preparation method of the low-temperature catalytic curing aldol resin system. The preparation method has the advantages that by adopting the special low-toxicity catalytic curing agent, the aldol resin can be cured at low temperature, the size shrinkage in the high-temperature curing and cooling process is avoided, and the curing product has stronger mechanical property.

Description

technical field [0001] The invention relates to a resin system and a preparation method thereof, in particular to a low-temperature catalytic curing aldol resin system and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Aldol resin is a kind of thermosetting resin formed by polycondensation of alcohol monomers and aldehyde monomers. It is usually used as a binder, adding solid phase fillers and other additives to prepare composite materials for different purposes and performances. Material. For example, pentaerythritol acrolein resin is a multi-component prepolymer mixture formed by the polymerization of pentaerythritol and acrolein. Using it as a matrix to coat and bond explosive particles can obtain PBX explosives with good mechanical strength and service performance. [0003] Usually, the curing reaction of pentaerythritol acrolein resin uses diethyl sulfate as a catalytic curing agent, and the curing process needs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/00C08K5/42C08G4/00
CPCC08G4/00C08K5/42C08L61/00
Inventor 刘慧慧郑申声蒋全萍罗观
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS