KR20230107372A - Highly retardant low-temperature foam type door window strip bar fitting foam material, polyurethane foam and its manufacturing method - Google Patents

Abstract

The present application relates to a foam material for inserting strip bars of high-temperature foam type door windows and doors with high retardancy, comprising a bonded polyether polyol and an isocyanate, wherein the bonded polyether polyol is composed of 80 to 100 parts by weight of a polyester polyol, based on parts by weight. 10-20 parts by weight of polyether polyol, 4-6 parts by weight of catalyst, 2-3 parts by weight of foam stabilizer, 30-40 parts by weight of fire retardant, 20-25 parts by weight of physical blowing agent and 0.5-1 part by weight of chemical blowing agent Contains parts by weight. The present application also provides a polyurethane foam for inserting a low-temperature foamed door and door strip bar with high flame retardancy and a method for manufacturing the same. The foam material described above can be normally foamed at 0° C., and its flame retardant performance can reach the level of flame retardancy B1.

Description

Highly retardant low-temperature foam type door window and door strip bar fitting foam material, polyurethane foam and its manufacturing method

This application relates to the field of polyurethane technology. Specifically, the present application relates to a highly retardant low-temperature foamed thermal bridge barrier aluminum door and door strip bar fitting foam material, polyurethane foam, and a method for manufacturing the same.

Doors and windows (doors and windows) in modern buildings are one of the most common components, and among them, aluminum alloy doors and windows are becoming the mainstream of consumption due to their advantages such as convenient installation and long-term use without deformation. However, aluminum alloy has better heat conduction effect than wood and other materials, which can increase energy consumption. As the national requirements for energy saving and consumption reduction become higher and higher, Moon Chang-ho's energy saving has attracted the attention of many scholars. . In order to solve the problem of energy saving and heat preservation of door windows, materials such as rock wool, polystyrene, and polyurethane hard foam can be filled in the shape of door windows. As is well known, polyurethane is the first choice for filling doors and windows because it has the best thermal insulation performance among currently known organic materials. There are mainly two types of aluminum alloy building insulation profiles in China: strip bar clamping type and injection type. When filled, its insulation performance can be greatly improved. Since polyurethane rigid foam requires a certain environmental temperature during the production process, there is also a requirement for the temperature of the door frame, but in the actual production process, each manufacturer produces at the environmental temperature, and it is difficult to guarantee the process requirements. When the environmental temperature is about 0 ° C, the problem of shrinkage of polyurethane rigid foam material is particularly prominent, seriously impairing the heat preservation performance of the door window.

At the same time as the thermal insulation performance is attracting attention, the fire resistance performance of thermal insulation materials is also gradually attracting attention. When a fire breaks out and the temperature is over 600℃, the aluminum profile will start to melt, and the insulation filler in the profile cavity will also burn and emit toxic smoke, seriously endangering people's life safety. Therefore, it is very important to secure low-temperature foaming and thermal insulation performance while improving the fire resistance and flame retardancy of the filled insulation material.

An object of the present application is to provide a non-flammable low-temperature foamed thermal bridge barrier aluminum door and window strip bar fitting foam material that solves the technical problems of the prior art.

In addition, an object of the present application is to provide a polyurethane foam for inserting a low-temperature foamed door window strip bar made of the above-described foam material.

In addition, an object of the present application is to provide a method for manufacturing the polyurethane foam for fitting the above-described flame-retardant low-temperature foamed door and door strip bar.

In order to solve the above technical problem, this application provides the following technical solutions.

In a first aspect, the present application provides a highly retardant low-temperature foam type door and door strip bar fitting foam material, comprising a polyether polyol and an isocyanate bonded thereto, wherein the bonded polyether polyol is a polyether polyol composition as a composition, based on parts by weight. 80-100 parts by weight of ester polyol, 10-20 parts by weight of polyether polyol, 4-6 parts by weight of catalyst, 2-3 parts by weight of foam stabilizer, 30-40 parts by weight of fire retardant, 20-25 parts by weight of physical blowing agent and 0.5-1 part by weight of a chemical blowing agent;

the polyester polyol is at least one of AK7004, PS3158 and PS2412;

The polyether polyol is characterized in that at least one of polyether polyol 403, Donol R6049, Donol C305 and Donol R4040.

In one embodiment of the first aspect, the catalyst is one or more of POLYACAT 303, POLYACAT 8, Dabco BX405, K15, POLYCAT 41 and DABCO T;

the foam stabilizer is one or a combination of B8545 and B84813;

The flame retardant is at least one of tris(2-chloropropyl)phosphate, triethylphosphate and tris(2-chloroethyl)phosphate.

In one embodiment of the first aspect, the physical blowing agent is HFC-245fa;

The chemical blowing agent is water, preferably deionized water.

In one embodiment of the first aspect, the isocyanate is polyphenylpolymethylene polyisocyanate.

In one embodiment of the first aspect, the mass ratio of the bound polyether polyol to the aforementioned isocyanate is 1:1.

In one embodiment of the first aspect, on a parts by weight basis, the conjugated polyether polyol is composed of 80 parts by weight of polyester polyol AK7004, 5 parts by weight of polyether polyol Donol C305, 5 parts by weight of Donol R6049, 10 parts by weight of Donol R4040. parts, catalyst POLYACAT 303 1 part by weight, Dabco BX405 2 parts by weight, K15 2 parts by weight, DABCO T 0.5 parts by weight, silicone oil B8545 2 parts by weight, deionized water 0.9 parts by weight, TCPP 20 parts by weight, TEP 20 parts by weight and a foaming agent It contains 25 parts by weight of HFC-245fa.

In one embodiment of the first aspect, on a parts by weight basis, the combined polyether polyol is composed of: 80 parts by weight of polyester polyol PS3158, 10 parts by weight of polyether polyol Donol C305, 10 parts by weight of Donol R4040, 0.5 parts by weight of catalyst POLYACAT 303 1.5 parts by weight of POLYACAT 8, 3 parts by weight of POLYCAT 41, 1 part by weight of DABCO T, 3 parts by weight of silicone oil B8545, 0.8 parts by weight of deionized water, 40 parts by weight of TCEP, and 23 parts by weight of a foaming agent HFC-245fa.

In a second aspect, the present application provides a polyurethane foam for inserting a low-temperature foam type door and door strip bar with high retardancy, which is manufactured by foaming the foam material for inserting a strip bar for door and door and door with a high flame retardancy according to the first aspect.

In a third aspect, the present application provides a manufacturing method for manufacturing the polyurethane foam for inserting the highly retardant low-temperature foamed door and door strip bar according to the second aspect, wherein the method uses a low-pressure foaming machine to combine the polyether Polyol and the isocyanate are mixed and then injected into the foam groove of the paper strip bar penetrating into the cavity of the door window shape material to fill the door window shape material. to be

In one embodiment of the third aspect, when the combined polyether polyol and the isocyanate are mixed, the feed flow rate of the low pressure foaming machine is 30 g/s.

In one embodiment of the third aspect, when the combined polyether polyol and the isocyanate are mixed, the mixing temperature of the low pressure foaming machine is 0° C. to room temperature.

Compared with the prior art, the positive effect of the present invention is to adjust the amount of flame retardant polyester polyol and flame retardant, and use low conductivity polyether polyol together, so that the combined polyether polyol of the present invention is foamed with isocyanate and then B1 A flame retardant refractory foam can be obtained. In addition, in combination with an effective catalyst, the foam material described herein has low-temperature foaming properties, especially foaming at about 0° C. without shrinkage to ensure the thermal insulation performance of door and door shaped products.

Unless otherwise indicated, where implied from the context or customary in the prior art, all parts and percentages in this application are by weight and the testing and characterization methods used are as of the filing date of this application. Where applicable, all patents, patent applications or disclosures mentioned in this application are hereby incorporated by reference and are incorporated herein by reference, and in particular the definitions of equivalent patent families, in particular synthetic techniques, product and process designs, polymers, comonomers, initiators or catalysts in the art, and the like. The contents disclosed in these documents in relation are also incorporated by reference. In the event that a definition of a particular term disclosed in the prior art is inconsistent with a definition provided in this application, the definition of the term provided in this application shall prevail.

Numerical ranges in this application are approximate and may include values outside the range unless otherwise specified. Numerical ranges include all values from the lower value to the upper value in increments of one unit, provided that there is a separation of at least two units between any lower value and any higher value. For example, if the composition, physical properties, or other properties (molecular weight, melt index, etc.) are listed as 100 to 1000, all individual values such as 100, 101, 102, etc., and 100 to 166, 155 to 170, 198 to 200, etc. This means that all subranges are explicitly enumerated. For ranges containing numbers less than 1 or containing fractions greater than 1 (e.g., 1.1, 1.5, etc.), one unit is considered to be 0.0001, 0.001, 0.01, or 0.1, as appropriate. For ranges containing single digit numbers less than 10 (such as 1 to 5), one unit is generally considered to be 0.1. These are only specific examples of what is meant to be expressed, and all possible values between the lowest and highest values enumerated are Numerical combinations are considered to be expressly recited in this application. In addition, it should be noted that the terms "first" and "second" in this specification do not limit the order and are only used to distinguish materials with different structures. Be careful.

When used in reference to chemical compounds, unless otherwise specified, the singular forms include all isomeric forms and vice versa (eg, "hexane" includes all isomers of hexane individually or collectively). Also, references to "a", "an" or "the" include the plural unless expressly stated otherwise.

The terms "comprising", "comprising", "having" and their derivatives do not exclude the presence of other compositions, steps or processes and are not relevant whether or not such other compositions, steps or processes are disclosed in this application. . For the avoidance of doubt, all compositions in this application using the terms "comprising," "comprising," or "having" may include additional additives, adjuvants, or compounds unless otherwise specified. Conversely, the term “consisting essentially of” excludes from the scope of subsequent recitation of that term any other composition, step, or process other than that necessary to perform the operation. The term "consisting of ????" does not include a composition, step or process not specifically described or listed. Unless otherwise specified, the term "or" refers to the listed members individually or in combination.

In a first aspect, the present application provides a foam material, comprising a bonded polyether polyol and an isocyanate, wherein the bonded polyether polyol is composed of 80-100 parts by weight of polyester polyol and 10-20 parts by weight of polyether polyol. parts by weight, 4-6 parts by weight catalyst, 2-3 parts by weight foam stabilizer, 30-40 parts by weight flame retardant, 20-25 parts by weight foaming agent and 0.5-1 part by weight water.

polyester polyol

Polyester polyols generally refer to polyester polyols obtained by polycondensation of dicarboxylic acids and diols. Depending on whether the polyester polyol contains an aromatic structure, polyester polyols can be divided into aliphatic polyester polyols and aromatic polyester polyols.

In the present application, the polyester polyol is preferably at least one of AK7004, PS3158, and PS2412, where AK7004 is Aekyung (Ningbo) Chemical Co., Ltd. (愛敬 (寧波) Chemical Co., Akyung (Ningbo) Chemical Co., Ltd.).

polyether polyol

Polyether polyols are oligomers in which an ether bond (-R-O-R-) is included in the main chain and two or more hydroxyl groups (-OH) are included in a terminal group or a side chain group. Polyether polyols are formed by ring-opening polymerization with alkylene oxides using low molecular weight polyols, polyamines or active hydrogen-containing compounds as initiators under catalytic action. Alkylene oxides are mainly propylene oxide and ethylene oxide, of which propylene oxide is the most important. Polyol-based initiators include diols such as propylene glycol and ethylene glycol, triols such as glyceroltrimethylolpropane, polyols such as pentaerythritol, xylitol, sorbitol, and sucrose, and amine-based initiators include diethylamine, diethylenetriamine, etc. there is

In this application, it is preferred that the polyether polyol described above is at least one of polyether polyol 403, Donol R6049, Donol C305, and Donol R4040. Among them, Donol R6049, Donol C305, and Donol R4040 are preferably purchased from Shanghai Dongda Chemical Co., Ltd. (Shanghai Dongda Chemical Co., Ltd.).

In the present invention, the catalyst may be a catalyst commonly used in this field, and preferably POLYACAT 303, POLYACAT 8, Dabco BX405, K15, POLYCAT 41, DABCO T (all manufactured by Gas Chemical Products (China) Investment Co., Ltd.) Gas Chemical Products (China) Investment Co., Ltd.).

, Jiangsu Yoke Technology co., Ltd.)에서 구입)이다. In the present invention, the above-mentioned flame retardant is a flame retardant commonly used in this field, preferably TCPP, TEP, TCEP (all are Jiangsu Yoker Technology Co., Ltd. (

, purchased from Jiangsu Yoke Technology co., Ltd.).

, Evonik Degussa(China) Co.,Ltd.)에서 구입) 중 하나 또는 둘의 조합인 것이 바람직하다.In the present invention, the foam stabilizer may be a foam stabilizer commonly used in this field. B8545 and B84813 (Evonik The Gousa (China) Company Limited (

, purchased from Evonik Degussa (China) Co., Ltd.), or a combination of the two.

In the present invention, the blowing agent is HFC-245fa, a blowing agent commonly used in this field.

In the present invention, it is preferable that the water mentioned above is deionized water.

The combined polyether of the present invention can be prepared according to a conventional method in the art, and generally, each of the above components is stirred and mixed uniformly at room temperature according to parts by weight.

In the present invention, the above-mentioned isocyanate may be an isocyanate generally used in this field, and may preferably be polyphenylpolymethylene polyisocyanate (PAPI) purchased from Bayer AG, Germany.

In the present invention, the mass ratio of the aforementioned bound polyether polyol and the aforementioned isocyanate is 1:1.

In a second aspect, the present invention also provides a method for producing a polyurethane foam for inserting a low-temperature foam type door and door strip bar, wherein the combined polyether is mixed at a flow rate of 30 g/s using a low-pressure foaming agent and PAPI. Next, a step of injecting the paper strip bar into the foam groove penetrated into the cavity of the door window frame, and a door window frame filled with polyurethane rigid foam can be obtained.

In the present invention, the mixing method and conditions of the combined polyether are conventional methods and conditions in the art, and the mixing temperature of the low-pressure foaming machine is an environmental temperature, particularly about 0 ° C, which is rare in this field.

The mixing operation preferably uses a low-pressure foaming agent and has a flow rate of 30 g/s.

In the present invention, the foaming method and conditions are conventional methods and conditions in the art, and free foam molding is generally performed at room temperature. A special case is about 0°C.

In a third aspect, the present application provides a highly retardant low-temperature foamed polyurethane foam for inserting door and door strip bars manufactured by the above-described method, which is manufactured by foaming with the foam material described herein.

In order to obtain each preferred embodiment of the present invention, the above-mentioned preferred conditions can be arbitrarily combined within a range that does not violate common sense in the art.

All reagents and raw materials used in the present invention are commercially available.

In the present invention, the percentage is the mass percentage occupied by each component in the total amount of raw materials.

Example

The technical solutions of the present application will be clearly and completely described below with respect to the embodiments of the present application. All reagents and raw materials used are commercially available unless otherwise specified. In the following examples, experimental methods not specifying specific conditions are selected according to conventional methods and conditions or product specifications.

The raw material sources used in the following examples are as follows.

Donol R6049 belongs to a high-performance rigid foam polyether polyol, and is also a polyether polyol with low thermal conductivity and good adhesion. It is produced by Shanghai Dongda Chemical Co., Ltd., and its performance parameters are as follows.

Donol C305 is a long chain, low functional polyether. The functionality is 3 and the average molecular weight is about 500. It is produced by Shanghai Dongda Chemical Co., Ltd., and its performance parameters are as follows.

Donol R4040 is a rigid foam polyether polyol that uses OTDA as an initiator and has high activity and low hydroxyl value, and can exhibit sufficient crosslinking and rigidity. It is produced by Shanghai Dongda Chemical Co., Ltd., and its performance parameters are as follows.

Polyester polyol AK7004 is produced by Aekyung Chemical in Korea, has a hydroxyl value of 260 to 270 mgKOH/g, a viscosity of 7500 to 11500 mPa.s or less at 25°C, a moisture content of 0.1% or less, and an acid value of 2.0 It is less than mgKOH/g.

Tris(2-chloropropyl) phosphate (TCPP), tris(2-chloroethyl) phosphate (TEP) and tris(2-chloroethyl) phosphate (TCEP) are produced by Jiangsu Yoko Technology Co., Ltd.

Catalysts POLYACAT 5, POLYACAT 8, Dabco BX405, K15 and POLYCAT 41 are all manufactured by Gas Chemical Products (China) Investment Co., Ltd. (Air Products and Chemicals, Inc.) ) is produced in

, Evonik Specialty Chemicals (Shanghai) Co., Ltd.)에서 구입한 것이며, 성능 파라미터는 수분이 ≤0.2%이고, 굴절률(20°C)이 1.4400-1.4480이며, 점도가 700-1000 mPa.s/25℃이다.Foam stabilizer B8545 is manufactured by Evonik Specialty Chemicals (Shanghai) Company Limited (

, Evonik Specialty Chemicals (Shanghai) Co., Ltd.), performance parameters are moisture ≤0.2%, refractive index (20 °C) 1.4400-1.4480, viscosity 700-1000 mPa.s/25 is °C.

, Evonik Industries AG)에서 구입한 것이며, 경질 폴리우레탄 폼을 제조하기 위한 내가수분해성 폴리에테르 개질의 폴리디메틸실록산 공중합체이다. 폼 안정제의 점돈는 25℃에서 600-1000 mPaㆍs이다. Foam Stabilizer B84813 is Evonik Industries Age (

, Evonik Industries AG), a hydrolysis-resistant polyether-modified polydimethylsiloxane copolymer for making rigid polyurethane foam. The viscosity of the foam stabilizer is 600-1000 mPa·s at 25°C.

Polyphenylpolymethylene polyisocyanate (PAPI) is produced by Bayer AG, Germany.

Example 1

Process for the Preparation of Conjoined Polyether Polyols:

80 parts by weight of polyester polyol AK7004, 5 parts by weight of polyether polyol Donol C305, 5 parts by weight of Donol R6049 and 10 parts by weight of Donol R4040 were put into a reaction kettle, 1 part by weight of catalyst POLYACAT 303, 2 parts by weight of Dabco BX405, 2 parts by weight of K15 , 0.5 parts by weight of DABCO T, 2 parts by weight of silicone oil B8545, 0.9 parts by weight of deionized water, 20 parts by weight of TCPP, 20 parts by weight of TEP, and 25 parts by weight of a foaming agent HFC-245fa are sequentially added and uniformly stirred.

The combined polyether and PAPI were taken and injected at a flow rate of 30 g/s using a low-pressure foaming machine, and after foaming and molding at room temperature, a door frame was obtained.

Example 2

Process for the Preparation of Conjoined Polyether Polyols:

80 parts by weight of polyester polyol PS3158, 10 parts by weight of polyether polyol Donol C305 and 10 parts by weight of Donol R4040 were put into a reaction kettle, 0.5 parts by weight of catalyst POLYACAT 303, 1.5 parts by weight of POLYACAT 8, 3 parts by weight of POLYCAT 41, 1 part by weight of DABCO T Part, 3 parts by weight of silicone oil B8545, 0.8 parts by weight of deionized water, 40 parts by weight of TCEP, and 23 parts by weight of HFC-245fa foaming agent are sequentially added and uniformly stirred.

The combined polyether and PAPI were taken and injected at a flow rate of 30 g/s using a low-pressure foaming machine, and after foaming and molding at room temperature, a door frame was obtained.

Example 3

80 parts by weight of polyester polyol PS2412 and 10 parts by weight of polyether polyol 403 were put in a reaction kettle, 1.5 parts by weight of catalyst POLYACAT 303, 2.5 parts by weight of POLYACAT 8, 3 parts by weight of K15, 2 parts by weight of silicone oil B84813, 1 part by weight of deionized water , 25 parts by weight of TCPP, 15 parts by weight of TCEP, and 24 parts by weight of foaming agent HFC-245fa are added in sequence and stirred uniformly to obtain.

The combined polyether and PAPI were taken and injected at a flow rate of 30 g/s using a low-pressure foaming machine, and after foaming and molding at room temperature, a door frame was obtained.

Example 4

Process for the Preparation of Conjoined Polyether Polyols:

100 parts by weight of polyester polyol AK7004 was placed in a reaction kettle, 1 part by weight of catalyst Dabco BX405, 3 parts by weight of K15, 2 parts by weight of DABCO T, 3 parts by weight of silicone oil B84813, 0.5 parts by weight of deionized water, 20 parts by weight of TCPP, TCEP 10 Part by weight, 20 parts by weight of foaming agent HFC-245fa are sequentially added and stirred uniformly to obtain.

The combined polyether and PAPI were taken and injected at a flow rate of 30 g/s using a low-pressure foaming machine, and after foaming and molding at room temperature, a door frame was obtained.

Effect tests were performed on the products obtained in Examples 1 to 4, and the results are shown in Table 1 below.

The standards that performance testing follows are:

Oxygen index test standard: GB/T 2406.2-2009

Dimensional stability test standard: GB/T 8811-2008

Thermal conductivity test standard: GB/T 3399-1982

Compressive strength detection standard: GB8813-2008.

Table 1: Comparison of performance data of polyurethane foams in Examples 1-4

In Table 1, the polyurethane foams prepared using the foam material described in this specification have all oxygen indices greater than 30%, reach the flame retardant B1 level, and the foam material described in this specification is still normally foamed at the lowest temperature of 0 ° C. Able to know.

The description of the above embodiments is for those skilled in the art to understand and apply the present application. It will be apparent to those skilled in the art that various modifications may be readily made to these embodiments, and that the general principles described herein may be applied to other embodiments without creative efforts. Therefore, the present application is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the contents disclosed in the present application within the scope and spirit of the present application are within the scope of the present invention.

Claims (10)

In the flame retardant low-temperature foamed door and window strip bar fitting foam material containing bound polyether polyol and isocyanate,
Based on parts by weight, the combined polyether polyol is composed of 80-100 parts by weight of polyester polyol, 10-20 parts by weight of polyether polyol, 4-6 parts by weight of catalyst, 2-3 parts by weight of foam stabilizer, 30-30 parts by weight of flame retardant. 40 parts by weight, 20-25 parts by weight of physical foaming agent and 0.5-1 part by weight of chemical foaming agent;
the polyester polyol is at least one of AK7004, PS3158 and PS2412;
The polyether polyol is polyether polyol 403, Donol R6049, Donol C305 and Donol R4040, characterized in that at least one of the highly flammable low-temperature foam type door and door strip bar fitting foam material. According to claim 1,
the catalyst is at least one of POLYACAT 303, POLYACAT 8, Dabco BX405, K15, POLYCAT 41 and DABCO T;
the foam stabilizer is one or a combination of B8545 and B84813;
The flame retardant is tris (2-chloropropyl) phosphate, triethyl phosphate and tris (2-chloroethyl) phosphate. According to claim 1,
The physical blowing agent is HFC-245fa;
The chemical foaming agent is water, preferably deionized water. According to any one of claims 1 to 3,
The isocyanate is polyphenylpolymethylene polyisocyanate. According to any one of claims 1 to 3,
A non-flammable low-temperature foam type door window strip bar fitting foam material, characterized in that the mass ratio of the combined polyether polyol and the isocyanate is 1: 1. According to claim 1,
Based on parts by weight, the combined polyether polyol is composed of 80 parts by weight of polyester polyol AK7004, 5 parts by weight of polyether polyol Donol C305, 5 parts by weight of Donol R6049, 10 parts by weight of Donol R4040, 1 part by weight of catalyst POLYACAT 303, 2 parts by weight of Dabco BX405, 2 parts by weight of K15, 0.5 parts by weight of DABCO T, 2 parts by weight of silicone oil B8545, 0.9 parts by weight of deionized water, 20 parts by weight of TCPP, 20 parts by weight of TEP, and 25 parts by weight of blowing agent HFC-245fa Characteristically, a flame retardant low-temperature foamed foam material with strip bars for door windows and doors. According to claim 1,
Based on parts by weight, the combined polyether polyol is composed of 80 parts by weight of polyester polyol PS3158, 10 parts by weight of polyether polyol Donol C305, 10 parts by weight of Donol R4040, 0.5 parts by weight of catalyst POLYACAT 303, 1.5 parts by weight of POLYACAT 8, 3 parts by weight of POLYCAT 41, 1 part by weight of DABCO T, 3 parts by weight of silicone oil B8545, 0.8 parts by weight of deionized water, 40 parts by weight of TCEP, and 23 parts by weight of foaming agent HFC-245fa. Bar fit foam. In the polyurethane foam for inserting the low-temperature foamed door and door strip bar of high retardance,
A polyurethane foam for inserting a highly flame-retardant low-temperature foam-type strip bar for doors and windows, which is manufactured by foaming the foam material for inserting the strip bar for door windows and doors according to any one of claims 1 to 7. In the manufacturing method of manufacturing the polyurethane foam for inserting the highly retardant low-temperature foamed door and door strip bar according to claim 8,
Low-pressure foaming machine is used to mix the combined polyether polyol and the isocyanate, and then injected into the foam groove of the paper strip bar penetrating into the cavity of the door window frame to fill the door window shape Polyurethane for inserting the door window strip strip bar A method for producing a polyurethane foam for fitting a low-temperature foamed door and window strip bar, characterized in that it comprises obtaining a foam. According to claim 9,
When the combined polyether polyol and the isocyanate are mixed, the feed flow rate of the low pressure foaming machine is 30 g/s;
When the combined polyether polyol and the isocyanate are mixed, the mixing temperature of the low pressure foaming machine is from 0 ° C to room temperature.