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Novel polyester powder adhesive for insoluble felt

A technology of polyester powder and binder, applied in the direction of adhesives, etc., can solve the problems of fast dissolution and inability to meet the requirements of molded felts

Active Publication Date: 2010-01-27
上海新天和树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the binders whose main components are unsaturated polyester resins dissolve very quickly in styrene, which cannot meet the requirements of molded felts.

Method used

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  • Novel polyester powder adhesive for insoluble felt
  • Novel polyester powder adhesive for insoluble felt
  • Novel polyester powder adhesive for insoluble felt

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0047]The preparation method of the binder can adopt a method known in the art. For example, in one embodiment of the present invention, the binder is formed by condensation of unsaturated dibasic carboxylic acid or anhydride, saturated dibasic acid and dibasic alcohol.

[0048] Bonding agent of the present invention is owing to have used the special raw material of neopentyl glycol, ethylene glycol that reduces styrene permeability and the BPA-PO that improves mat strength, and uses a small amount of peroxide initiator simultaneously, thereby can produce The excellent effect is: the mat is not easy to break, and it can effectively reduce the dissolution rate of the felt in styrene, and even achieve the effect of being insoluble.

[0049] The solubility of the binder in styrene is insoluble, that is, the powder is still insoluble after soaking in styrene for 24 hours after thermal curing.

[0050] The unsaturated polyester acid value of the binder is 0.5-30 mg KOH / g, and the ...

Embodiment 1

[0095] 580 g (5 moles) of fumaric acid, 1378 g (4 moles) of BPA-PO, 104 g (1 moles) of neopentyl glycol, Inhibitor hydroquinone (hydroquinone) 0.2g and catalyst, heated at 160°C for 3.5 hours under nitrogen protection, then heated to 180°C for 4 hours, then heated to 200°C, kept warm until the acid value of the system dropped to 40mg For KOH / g, vacuumize for 3.5 hours, and stop the reaction when the acid value drops to 20-30 mg KOH / g.

[0096] After the reaction, put the reactant in a container to cool, then pulverize, add 0.8% ± 0.1% (weight fraction) of benzoyl peroxide powder and lubricant, and mix uniformly to obtain an acid value of 20 to 30 mg KOH / g of unsaturated polyester powder.

Embodiment 2-7

[0098] Drop into the raw material compound of unsaturated polyester shown in table 1 in the same four-necked flask used in Experimental Example 1, after heating up with the operating steps identical with Experimental Example 1, after vacuum reaction, use the same as Experimental Example 1 Treatment method The resulting reaction liquid was treated to prepare unsaturated polyester powders having the acid values ​​shown in Tables 1 and 2.

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Abstract

The invention discloses a new type insoluble felt polyester powder adhensive, which is characterized by the following: incorporating A, B unsaturated polyester; setting the A as alpha, beta-ethylene series unsaturated dicarboxylic acids or acid element of acid anhydride; setting B as bisphenol A methyloxirane affixture (BPA-PO), neopentyl glycol and ethylene alcohol as multiple alcohol element. This mat can increase mat intensity and decrease penetrability of phenylethene for mat, which can be used to produce chopped felt and continuous fiber felt.

Description

technical field [0001] The present invention relates to a binder, in particular to an insoluble polyester powder binder for a mat capable of binding fibers constituting a base material of the mat. Background technique [0002] A reinforcing material such as a mat composed of fibers bonded by a powder binder is soaked in a liquid resin for fiber-reinforced plastic molding (hereinafter referred to as FRP resin), and the resin for FRP is cured to produce a fiber-reinforced plastic molding (glass fiber reinforced plastic, namely FRP). Styrene and the like are often used as resin reactive diluents for FRP. [0003] The choice of binder used in mats used as reinforcing materials depends on the resin penetration rate required by the FRP molding method. Various processes can be used for FRP molding, the most widely used is the hand lay-up process, and others include pultrusion, continuous plate making, RTM, cold molding, pouring, and high-pressure forming. When the binder adopts ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J167/00C09J9/00D04H5/04
Inventor 李文江林定多
Owner 上海新天和树脂有限公司