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Polyester polyol for steam resistant packaging adhesive

A technology of polyester polyol and mixed polyol, applied in the field of polyester polyol, can solve problems such as low peel strength, failure of adhesive to achieve better bonding effect, failure to meet requirements, etc.

Active Publication Date: 2009-12-30
XUCHUAN CHEM SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In today's society, the demand for composite packaging is increasing day by day. Since the adhesive materials required by various packaging forms are different, and the requirements for adhesives are also getting higher and higher, some existing adhesives cannot meet the requirements. good bonding effect
Especially for the adhesives applied to the packaging materials of foods that need to be cooked, they basically fail to meet the requirements, that is, they cannot maintain a certain adhesive force at the cooking temperature, and the peel strength is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: prepare polyester polyol

[0018] Prepare raw materials and auxiliaries:

[0019] Raw materials: ethylene glycol 128g, diethylene glycol 216g, neopentyl glycol 36g, trimethylolpropane 12g, adipic acid 194g, isophthalic acid 220g, phthalic anhydride 194g;

[0020] Auxiliary agent: antioxidant (triphenyl phosphite 0.12g); catalyst (tetraisobutyl titanate 0.05g and bismuth nitrate 0.08g).

[0021] The specific process is as follows:

[0022] a. Add ethylene glycol, diethylene glycol, neopentyl glycol, trimethylolpropane, adipic acid, isophthalic acid, phthalic anhydride and triphenyl phosphite to the reactor, and start to heat up to 135 Nitrogen gas is started at ~140°C, and the heating rate is controlled to increase from 140°C to 160°C within 1 hour. After holding for 2 hours, continue to heat up, and gradually increase the amount of nitrogen to strengthen dehydration.

[0023] b. Raise the temperature to 225±5°C and keep the temperature constant for 1 ho...

Embodiment 2

[0024] Embodiment 2: preparation adhesive

[0025] Get the polyester polyol obtained in Example 1 in an appropriate amount as the main agent to prepare the adhesive.

[0026] Those skilled in the art can select an appropriate amount of polyester polyol according to the amount of adhesive to be prepared.

[0027] Preheat the polyester polyol as the main agent to 40°C, add the corresponding additives (such as color paste, thinner, etc., the corresponding additives can be selected according to the specific application of the adhesive) and stir evenly, and then put Put it into the specified batching tank and degas it for later use.

[0028] Add an appropriate amount of bridging agent and bridging accelerator into the batching tank (for example, 6 to 15 parts of bridging agent and 3 to 7 parts of bridging accelerator can be added to 100 parts of the main agent), stir at high speed for 3 to 5 minutes, This results in an adhesive (green state) which can be applied to the packaging ...

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PUM

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Abstract

The invention relates to a polyester polyol which comprises the raw materials by weight percent: 36.2-42.2% of polyalcohol and 57.8-63.8% of polyprotic acid; auxiliary agents used for synthesizing include antioxidant and catalyst; the polyalcohol is mixed polyalcohol containing ethanediol, diethylene glycol, neopentyl glycol and trimethylolpropane; the polyprotic acid is mixed polyprotic acid containing adipic acid, isophthalic acid and phthalic anhydride; and the catalyst comprises the composition of bismuth nitrate and the 4-isobutyl titanate or 4-isopropyl titanate. By adopting the technical proposal, the obtained polyester polyol can be taken as main agent for manufacturing the packaging adhesive, and the prepared adhesive has very good steam resistant property after being cured.

Description

technical field [0001] The invention relates to a polyester polyol, in particular to a polyester polyol used for packaging adhesives. Background technique [0002] Packaging materials, especially composite packaging materials that are widely used at present, often use adhesives. Adhesive is a glue that can bond single layers to form multi-layer boards, and is an important auxiliary material in the packaging industry. [0003] There are many types of adhesives, and there are many types of packaging materials. Generally speaking, packaging materials are divided into paper-based materials, plastics, wood, aluminum foil, etc. The most commonly used plastic materials are also divided into PP, PE, PET, PVC, etc. Those skilled in the art can choose the appropriate one according to the different packaging materials. adhesive. For example, starch paste, dextrin and other adhesives are generally used when bonding paper-based materials; while resin-type adhesives are generally used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/12C08G63/85C08K5/526C09J167/00
Inventor 江平吕华波周源
Owner XUCHUAN CHEM SUZHOU