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A kind of environmental protection chain extender and preparation method thereof

A technology of chain extender and small molecule chain extender is applied in the field of environmental protection chain extender and its preparation, and achieves the effects of appropriate curing time, appropriate operating time, and easy availability of raw materials

Active Publication Date: 2022-04-19
湖南盛天新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the plastic runway industry, the majority of users are primary and middle school students. The Shanghai group standard T310101002-C003-2016 "Limits of Hazardous Substances in Plastic Surfaces of School Sports Grounds" has imposed strict restrictions on its use, and liquid testing is also not allowed. MOCA, but the new national standard only requires a limited amount of testing for finished products, so everyone has re-used the polyurethane chain extender MOCA. With the implementation of the new national standard, the requirements for paving materials for sports venues in various places will only be within the new national standard. The basis is stricter, so it is imminent to develop an environmentally friendly chain extender that can replace the polyurethane chain extender MOCA in the field of sports paving materials

Method used

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  • A kind of environmental protection chain extender and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 An environmentally friendly chain extender, its preparation raw materials include the following components by weight percentage: small molecule chain extender 6%, modified polyether 7%, amino-terminated polyether 8%, small molecular weight polyoxypropylene glycol 40%, polyol chain extender 20%, aliphatic diamine 7%, aromatic diamine 12%.

[0024] The molecular weight of the low molecular weight polyoxypropylene diol is 400-1000 Daltons.

[0025] The molecular weight of the modified polyether is less than 400 Daltons. The modified polyether uses polyether polyol as a raw material, and diphenylmethane diisocyanate (MDI) as a chain extender to form a hydroxyl mole Hydroxyl-terminated modified polyether with a mole ratio of 2:1 isocyanate group.

[0026] The small molecule chain extender is selected from 1,3-propanediol. The polyol is polyoxypropylene triol. The aromatic diamine is 3,5-dimethylthiotoluenediamine (DMTDA). The aliphatic diamine is an alicyclic d...

Embodiment 2

[0032] Embodiment 2 An environmentally friendly chain extender, its preparation raw materials include the following components by weight percentage: small molecule chain extender 5%, modified polyether 8%, amino-terminated polyether 5%, small molecular weight polyoxypropylene glycol 45%, polyol chain extender 22%, aliphatic diamine 5%, aromatic diamine 10%.

[0033] The molecular weight of the low molecular weight polyoxypropylene diol is 400-1000 Daltons.

[0034] The molecular weight of the modified polyether is less than 400 Daltons. The modified polyether uses polyether polyol as a raw material, and diphenylmethane diisocyanate (MDI) as a chain extender to form a hydroxyl mole The hydroxyl-terminated modified polyether with a molar ratio of isocyanate group of 2:1 is mainly used to improve cohesion and strength and improve physical properties relative to polyether.

[0035] The small molecule chain extender is a mixture of 1,4-butanediol and 1,6-hexanediol. The polyol is...

Embodiment 3

[0041] Example 3 An environmentally friendly chain extender, its preparation raw materials include the following ingredients in weight percentage: small molecule chain extender 8%, modified polyether 6%, amino-terminated polyether 6%, small molecular weight polyoxypropylene glycol 35%, polyol chain extender 19%, aliphatic diamine 8%, aromatic diamine 18%.

[0042] The molecular weight of the low molecular weight polyoxypropylene diol is 400-1000 Daltons.

[0043]The molecular weight of the modified polyether is less than 400 Daltons. The modified polyether uses polyether polyol as a raw material, and diphenylmethane diisocyanate (MDI) as a chain extender to form a hydroxyl mole Hydroxyl-terminated modified polyether with a mole ratio of 2:1 isocyanate group.

[0044] The small molecule chain extender is resorcinol dihydroxyethyl ether. The polyol is polyoxypropylene triol. The aromatic diamine is 3,5-diethyltoluenediamine (DETDA). The aliphatic diamine is an alicyclic diam...

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Abstract

The invention provides an environment-friendly chain extender. The raw materials for its preparation include the following components in weight percent: small molecule chain extender 5-8%, modified polyether 5-8%, amino-terminated polyether 5-8%, small Molecular weight polyoxypropylene diol 25‑55%, polyol chain extender 15‑25%, aliphatic diamine 5‑8%, aromatic diamine 10‑18%. The reaction speed of the environmentally friendly chain extender of the present invention can be adjusted through the proportioning, it does not contain any suspected carcinogens, and the raw materials are easy to obtain; the polyurethane products prepared by the environmentally friendly chain extender have excellent performance and can pass the most stringent Shanghai group standard liquid chemistry and physical performance testing of the new national standard; the price of the environmental protection chain extender also has a considerable advantage over the polyurethane chain extender MOCA.

Description

technical field [0001] The invention relates to the technical field of chain extenders, in particular to an environment-friendly chain extender and a preparation method thereof. Background technique [0002] In the existing two-component materials in the sports industry, the polyurethane chain extender MOCA is used for chain extension. Because the polyurethane chain extender MOCA has moderate reaction speed, excellent physical properties, and low price, it is therefore In the field of polyurethane, its dominance as a chain extender has not been shaken. The general chain extender either reacts too fast to control, or the physical properties of the product are much worse, or the price is high, and the polyurethane chain extender is used. The hardness of the plastic samples made by MOCA is too high, which cannot meet the physical performance requirements of the new national standard sports field materials. And now it has been proved medically that the polyurethane chain extend...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/50C08G18/32
CPCC08G18/4825C08G18/5021C08G18/5045C08G18/3206C08G18/3215C08G18/3228C08G18/3237C08G18/387C08G18/4829
Inventor 张书申文强谢燕平
Owner 湖南盛天新材料有限公司
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