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Fire resistant water resistant polyurethane composition for fluid sealant and manufacture method thereof

A technology of high temperature resistance and polyurethane, applied in the field of polyurethane composition for sealant and its preparation

Active Publication Date: 2010-09-01
WUHAN HUASEN PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of this invention is to solve the problems of polyurethane sealants with poor high temperature resistance and water resistance, which affect their application in higher temperature and strict waterproof environments and existing Insufficiency of high temperature and water resistance technology of polyurethane sealant, a polyurethane composition for sealant with high temperature resistance and water resistance and its preparation method are provided

Method used

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  • Fire resistant water resistant polyurethane composition for fluid sealant and manufacture method thereof
  • Fire resistant water resistant polyurethane composition for fluid sealant and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The raw materials and their consumption are:

[0033] 90 parts by mass of polyisocyanate prepolymer (1,4-cyclohexane diisocyanate (CHDI) / polyoxypropylene glycol (molecular weight 6000) / dioctyl phthalate (DOP) / stannous octoate),

[0034] 1 mass part multifunctional grafting monomer (A is amino, B is epoxy, OR' is methoxyl group),

[0035] 10 parts by mass of high temperature resistant compound (epoxy resin E-51).

[0036] The preparation method is as follows:

[0037] (a) Preparation of polyisocyanate prepolymer

[0038] Add 272g of DOP and 1000g of polyoxypropylene diol into the reaction kettle, and dehydrate under vacuum at 110°C-120°C for 1 hour. The temperature was lowered to 50°C, 105g of CHDI and 0.01g of stannous octoate were added, and the temperature was raised to 70°C to react for 1 hour. The measured NCO% was 3.0%, and the viscosity was 6050 mPa·s.

[0039] (b) Reaction of polyisocyanate prepolymer with multifunctional graft monomer

[0040] Mix the poly...

Embodiment 2

[0049] The raw materials and their consumption are:

[0050] 80 parts by mass of polyisocyanate prepolymer (diphenylmethane-4,4'-diisocyanate (MDI) / polycarbonate diol (molecular weight 2000) / diisononyl phthalate (DINP) / dilauric acid Di-n-butyltin),

[0051] 5 parts by mass of multifunctional grafting monomer (A is amino, B is vinyl, OR' is methoxyl group),

[0052] 5 parts by mass of high temperature resistant compound (bismaleimide).

[0053] The preparation method is as follows:

[0054] (a) Preparation of polyisocyanate prepolymer

[0055] Add 52g of diisononyl phthalate (DINP) and 2000g of polycarbonate diol into the reaction kettle, and vacuum dehydrate at 110°C to 120°C for 1 hour. Cool down to 50°C, add 400g of MDI and 0.02g of di-n-butyltin dilaurate, and raise the temperature to 70°C for 1 hour. The measured NCO% is 2.02%, and the viscosity is 9500mPa·s.

[0056] (b) Reaction of polyisocyanate prepolymer with multifunctional graft monomer

[0057] Mix according...

Embodiment 3

[0066] The raw materials and their consumption are:

[0067] Polyisocyanate prepolymer (isophorone diisocyanate (IPDI) / polycaprolactone diol (molecular weight 3000) / didecyl phthalate (DIDP) / di-n-butyltin dilaurate) 60 parts by mass, more 5 parts by mass of functional grafting monomer (A is amino group, B is vinyl group, OR' is ethoxy group), and 20 parts by mass of high temperature resistant compound (nano-silica hybrid acrylic resin).

[0068] The preparation method is as follows:

[0069] Preparation of polyisocyanate prepolymer

[0070] Add 1159g didecyl phthalate (DIDP) and 1500g polycaprolactone diol into the reaction kettle, and vacuum dehydrate at 110°C-120°C for 1 hour. Cool down to 50°C, add 334g IPDI and 0.015g di-n-butyltin dilaurate, and raise the temperature to 80°C for 1 hour. The measured NCO% is 2.76%, and the viscosity is 7000mPa·s.

[0071] (b) Reaction of polyisocyanate prepolymer with multifunctional graft monomer

[0072] Mix according to the ratio, r...

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Abstract

The invention discloses a sealing adhesive-used high temperature resistant and water resistant polyurethane constituent which belongs to the technology field of the sealing adhesive, aiming at the problems that the present polyurethane which is bad in high temperature resistance and water resistance influences the application at higher temperature and strict waterproof environment, and the present polyurethane is deficient in technologies of high temperature resistance and water resistance; therefore, the sealing adhesive-used high temperature resistant and water resistant polyurethane constituent provides the sealing adhesive-used high temperature resistant and water resistant polyurethane constituent which is reacted and prepared by 60 to 90 mass portions of polyisocyanate prepolymer, 0.1 to 5 mass portions of multifunctional graft monomer and 5 to 30 mass portions of high temperature resistant compound, and also provides the preparation method. The prepared sealing adhesive not only has the high temperature resistant property but also has the good water resistant property and is suitable for application of long terms, and the sealing adhesive-used high temperature resistant andwater resistant polyurethane constituent has good bonding property and generality.

Description

technical field [0001] The invention relates to a polyurethane composition for sealants and a preparation method thereof, more specifically, the invention relates to a high-temperature and water-resistant polyurethane composition for sealants and a preparation method thereof. Background technique [0002] Due to its excellent elasticity, low temperature resistance, wear resistance and good adhesion to the substrate, as well as the variety of raw materials and the large degree of freedom in formula adjustment, polyurethane can be prepared into products of various shapes. , such as elastic sealants, adhesives, coatings, elastomers, foams, fibers, and various products from soft to hard. [0003] Polyurethane sealants with terminal NCO-based polyurethane prepolymers as the main polymer have excellent properties of polyurethane and have a wide range of applications. However, there is a problem with this type of general-purpose polyurethane sealant when it is applied to high-tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C09K3/10
Inventor 田立云沈峰
Owner WUHAN HUASEN PLASTIC