CN112375373A

CN112375373A - High-stability light elastomer and preparation method thereof

Info

Publication number: CN112375373A
Application number: CN202011218951.8A
Authority: CN
Inventors: 钟荣栋; 刘悦; 李同兵
Original assignee: Guangdong Antopu Polymer Technology Co ltd
Current assignee: Guangdong Antopu Polymer Technology Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-02-19

Abstract

The invention relates to the technical field of high polymer materials, in particular to a high-stability light elastomer and a preparation method thereof, wherein the preparation raw materials at least comprise the following components in parts by weight: 50-85 parts of matrix resin, 0-10 parts of foaming master batch, 10-45 parts of filler, 1-4 parts of surface treating agent, 0.1-0.8 part of antioxidant and 1-6 parts of lubricant; the obtained product has a finer cell structure, no cavity phenomenon in the product, controllable cell size, excellent wear resistance, heat resistance, tear strength, compression deformation and the like.

Description

High-stability light elastomer and preparation method thereof

Technical Field

The invention relates to the technical field of high polymer materials, in particular to a high-stability light elastomer and a preparation method thereof.

Background

The new material of thermoplastic polyurethane elastomer (also called TPU) is called 'epoch-making new polymer material', and is one of six synthetic materials with development prospect in the world currently.

Polyurethane (polyurethane) refers to a polymer containing a repeating urethane bond structural unit (-NH-COO-) in the main chain of the polymer, and urethane is generally obtained by reacting a di-or polyvalent isocyanate with a di-or polyvalent alcohol. The main chain of the thermoplastic polyurethane elastomer (TPU) is a block polymer consisting of flexible soft segments and rigid hard segments which are alternately arranged, the soft segments consist of polyol, the hard segments consist of isocyanate and a chain extender, wherein the soft segments are in a rubber state and provide elasticity and toughness, and the hard segments are in a glass state or a semi-crystalline state and provide hardness, modulus and high-temperature performance. A large number of hydrogen bonds can be formed between the soft segment and the hard segment of the TPU, and the chain segments are orderly arranged to generate crystallization, so that microphase separation is easily generated in the chain segments, and the polyurethane material has good wear resistance, heat resistance and mechanical property. Due to the excellent mechanical property and good processing property, the TPU has wide application in national economy.

The polyurethane elastomer has excellent properties such as good mechanical properties, wear resistance, oil resistance, tear resistance, chemical corrosion resistance, radiation resistance, good cohesiveness and the like, but the polyurethane in the prior art has high density, even if low-density polyurethane can be realized, the preparation process is complex and dangerous, and foaming is not uniform, so that the research on the polyurethane which has high stability and light weight and the preparation method thereof is needed.

Disclosure of Invention

In order to solve the technical problems, the first aspect of the present invention provides a high-stability light elastomer, which comprises the following raw materials, by weight: 50-85 parts of matrix resin, 0-10 parts of foaming master batch, 10-45 parts of filler, 1-4 parts of surface treating agent, 0.1-0.8 part of antioxidant and 1-6 parts of lubricant.

In a preferred embodiment of the present invention, the matrix resin is a polyether polyurethane elastomer.

As a preferable technical scheme of the invention, the Shore A hardness of the polyether polyurethane elastomer is 70-85.

As a preferred technical scheme of the invention, the preparation raw materials of the foaming master batch at least comprise the following components in parts by weight: 20-40 parts of matrix resin, 45-65 parts of foaming agent, 0.1-1 part of activating agent, 0.05-1 part of cross-linking agent, 0.2-1.5 parts of nucleating agent and 0.05-1 part of regulator.

In a preferred embodiment of the present invention, the blowing agent is an azo compound and/or a bicarbonate.

As a preferable technical scheme of the invention, the filler is selected from one or more of hollow glass microspheres, nano modified montmorillonite, nano silica, nano titanium dioxide, nano calcium carbonate, talcum powder, mica powder, kaolin and barium sulfate.

In a preferred embodiment of the present invention, the surface treatment agent is selected from one or more of (2-aminoethoxy) (tert-butyl) dimethylsilane, (diethylaminomethyl) trimethylsilane, [3- (aminooxy) propoxy ] (dimethyl) (2-methyl-2-propyl) silane, bis (4-aminophenoxy) dimethylsilane, bis (dimethylamino) methylvinylsilane, 3-aminopropyltrimethoxysilane, N- (6-aminohexyl) aminomethyltriethoxysilane, 4-amino-3, 3-dimethylbutyltrimethoxysilane, and tetrakis [2- (diethylamino) ethoxy ] silane.

As a preferable technical scheme of the invention, the antioxidant is selected from one or more of antioxidant 1010, antioxidant 1076, antioxidant 1135, antioxidant 1098, antioxidant 168 and antioxidant 618.

As a preferable technical scheme of the invention, the lubricant is selected from one or more of oleamide, zinc stearate, erucamide, stearic acid, butyl stearate, calcium stearate, ethylene bis stearamide, polyethylene wax and silicone oil.

A second aspect of the present invention provides a process for the preparation of a high stability lightweight elastomer, said process at least comprising the steps of:

(1) mixing matrix resin, 40-60% of filler, surface treating agent, antioxidant and lubricant, and banburying at 190 ℃ for 15-30min to obtain a mixture 1;

(2) the mixture 1 is put into a double screw machine for mixing, wherein 15 to 30 percent of hollow filler and the balance of hollow filler are added in batches at the temperature of 140 ℃ and 200 ℃ to obtain a mixture 2;

(3) putting the mixture 2 into single-screw granulation to carry out granulation to obtain a mixture 3;

(4) and uniformly mixing the mixture 3 with the foaming master batch to obtain the foam master batch.

Has the advantages that: the invention provides a high-stability light elastomer, which solves the problem that the cell growth is subjected to resistance in the prior art by controlling the hardness of a polyurethane elastomer, selecting an inorganic foaming agent, reasonably controlling the proportion of the foaming agent and the polyurethane elastomer and combining auxiliary agents such as a filler, a surface treatment agent, an antioxidant, a lubricant and the like, improves the lightweight degree of an elastomer product, and the obtained product has a thinner cell structure, has no cavity phenomenon inside, is controllable in cell size, and also has the advantages of excellent wear resistance, heat resistance, tearing strength, compression deformation and the like; in addition, the preparation method provided by the invention has the characteristics of simple process, convenience in operation, safety, capability of realizing light weight on the premise of good mechanical property and processability, and the like, and has the advantages of good elasticity, simple process, low energy consumption, high production efficiency, recyclability and the like, thereby being worthy of popularization.

Detailed Description

The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.

Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.

In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.

In a preferred embodiment, the high-stability light-weight elastomer of the present invention is prepared from at least the following raw materials in parts by weight: 60-80 parts of matrix resin, 1-9 parts of foaming master batch, 20-40 parts of filler, 1.5-3 parts of surface treating agent, 0.3-0.7 part of antioxidant and 2-4 parts of lubricant.

In a most preferred embodiment, the high-stability light-weight elastomer of the present invention is prepared from at least the following raw materials in parts by weight: 70 parts of matrix resin, 7 parts of foaming master batch, 30 parts of filler, 2 parts of surface treating agent, 0.6 part of antioxidant and 3 parts of lubricant.

Matrix resin

The resin generally refers to an organic polymer which has a softening or melting range after being heated, tends to flow by an external force when softened, and is solid, semi-solid, or liquid at room temperature. By broad definition, any polymeric compound that can be used as a raw material for processing plastic articles is referred to as a resin.

The thermoplastic elastomer is a novel high polymer material between rubber and resin, can replace part of rubber, and can modify plastics. The dual performance and wide characteristic of the thermoplastic elastomer, which is possessed by rubber and plastics, make it widely used in the rubber industry for manufacturing daily products such as rubber shoes and adhesive tapes, and various industrial products such as rubber tubes, adhesive tapes, rubber plates, rubber parts, adhesives and the like. Meanwhile, the thermoplastic elastomer can replace rubber to be widely used for modifying general thermoplastic resins such as PVC, PE, PP, PS and the like and even engineering plastics such as PU, PA, CA and the like, so that the plastic industry also has a brand-new situation.

The thermoplastic elastomer can be processed by a common thermoplastic forming machine, vulcanization is not needed, energy is saved, self-reinforcement is high, and the formula is greatly simplified, so that the influence of a compounding agent on a polymer is greatly reduced, and the quality and performance are easier to master; the waste material (flash burr, extrusion waste glue) produced in the production process and the waste product finally produced can be directly returned for reuse. However, the heat resistance is inferior to that of rubber, and the physical properties are greatly reduced with the increase in temperature, so that the application range is limited. Meanwhile, the rubber has poor compression deformation, rebound elasticity, durability and the like, and the price is often higher than that of the rubber of the same type.

The polyurethane elastomer is thermoplastic polyurethane rubber formed by mutually combining a polyurethane hard chain segment reacted with isocyanate and a polyester or polyether soft chain segment in a blocking way, which is called TPU for short. The TPU has excellent mechanical strength, wear resistance, oil resistance and flexing resistance, and particularly has the most outstanding wear resistance. The defects are that the heat resistance, the hot water resistance and the compression resistance are poor, the appearance is easy to turn yellow, and a mould is easy to stick in the processing. At present, the shoe is mainly used for manufacturing sports goods such as ski boots, climbing boots and the like in Europe and America and is used for producing various sports shoes and tourist shoes in large quantity, and the consumption is very large. The TPU can also be used for producing parts such as automobiles, machinery, clocks and the like in a molding mode such as injection molding and extrusion, and is widely used for products such as high-pressure rubber tubes (outer rubber), pure rubber tubes, sheets, transmission belts, conveyer belts, wires and cables, adhesive tapes and the like. Wherein the injection molding accounts for more than 40 percent, and the extrusion molding accounts for about 35 percent.

In recent years, many new easy-to-process varieties have appeared for improving the process processability of TPUs. For example, the TPU for shoe making is suitable for double-color molding, can increase the transparency, has high fluidity and high recovery, and can improve the processing and production efficiency. The easily processed TPU without plasticity and low hardness is used for manufacturing the transparent rubber tube. Glass fiber reinforced TPU for automobile bumper and other large parts with raised rigidity and impact performance.

In a preferred embodiment, the matrix resin of the present invention is a polyether urethane elastomer.

In a more preferred embodiment, the polyether polyurethane elastomer of the present invention has a shore a hardness of 70 to 85.

In a most preferred embodiment, the polyether polyurethane elastomer of the present invention has a shore a hardness of 80.

The polyether urethane elastomers of the present invention are commercially available from manufacturers including, but not limited to, basf, germany under the designation E1180.

Foaming master batch

The foaming agent of the present invention is a substance for forming pores in a target substance, and can be classified into three categories, i.e., a chemical foaming agent, a physical foaming agent and a surfactant. Chemical blowing agents are those compounds which decompose upon heating to release gases such as carbon dioxide and nitrogen and form pores in the polymer composition; physical blowing agents are those in which the foam cells are formed by a change in the physical form of a substance, i.e., by expansion of a compressed gas, volatilization of a liquid, or dissolution of a solid; the foaming agents have higher surface activity, can effectively reduce the surface tension of liquid, are arranged on the surface of a liquid film in an electric double-layer mode to surround air to form bubbles, and then form foam by single bubbles.

In a preferred embodiment, the raw materials for preparing the foaming masterbatch of the invention at least comprise, by weight: 20-40 parts of matrix resin, 45-65 parts of foaming agent, 0.1-1 part of activating agent, 0.05-1 part of cross-linking agent, 0.2-1.5 parts of nucleating agent and 0.05-1 part of regulator.

In a preferred embodiment, the raw materials for preparing the foaming masterbatch of the invention at least comprise, by weight: 25 parts of matrix resin, 45 parts of foaming agent, 0.1 part of activating agent, 0.2 part of cross-linking agent, 0.4 part of nucleating agent and 0.3 part of regulator.

In a preferred embodiment, the matrix resin is a polyether urethane elastomer, commercially available from a manufacturer including, but not limited to, basf, germany under the designation E1180.

In a preferred embodiment, the blowing agent is an azo compound and/or a bicarbonate.

In a more preferred embodiment, the foaming agent is a combination of azodicarbonamide and sodium bicarbonate, wherein the mass ratio of azodicarbonamide to sodium bicarbonate is 1: (0.2-1).

In a most preferred embodiment, the foaming agent is a combination of azodicarbonamide and sodium bicarbonate, wherein the mass ratio of azodicarbonamide to sodium bicarbonate is 1: 0.7.

in a preferred embodiment, the activator is selected from one or more of zinc oxide, borax, zinc stearate, alum.

In a most preferred embodiment, the activator is zinc stearate.

The nucleating agent is selected from one or more of calcium oxide, talcum powder and silicon dioxide.

Preferably, the nucleating agent is talc.

The regulator is selected from one or more of methyl carboxylate, polyacrylate and siloxane.

Preferably, the modifier is a methyl carboxylate.

The cross-linking agent is dicumyl peroxide or hydrogen peroxide dicumyl peroxide.

Preferably, the crosslinking agent is dicumyl peroxide.

The preparation method of the foaming master batch is not limited, and the foaming master batch can be prepared by adopting a method well known by the technical personnel in the field.

For example, the preparation method of the foaming master batch comprises the following steps: mixing matrix resin, foaming agent, activating agent, crosslinking agent, nucleating agent and regulator at high speed in a mixer, and extruding in a double-screw extruder at 135 deg.C and main screw rotation speed of 100 r/min.

Filler

In a preferred embodiment, the filler of the present invention is selected from one or more of hollow glass microspheres, nano modified montmorillonite, nano silica, nano titanium dioxide, nano calcium carbonate, talcum powder, mica powder, kaolin and barium sulfate.

In a more preferred embodiment, the filler of the present invention is a combination of hollow glass beads and talc powder, wherein the mass ratio of the hollow glass beads to the talc powder is 1: (0.1-0.5).

In a most preferred embodiment, the filler of the present invention is a combination of hollow glass beads and talc powder, wherein the mass ratio of the hollow glass beads to the talc powder is 1: 0.3.

surface treating agent

The surface treatment agent according to the present invention is an agent used for treating the surface of a material to achieve a specific purpose.

The surface treating agent of the present invention has organosilicon monomer with two or more different reactive groups in the molecule, and can be chemically bonded (coupled) with organic materials and inorganic materials. The surface treatment agent is used as a surface treatment agent for inorganic fillers, a sealing agent, resin concrete, water-crosslinking polyethylene, a resin sealing material, a shell molding, a tire, a belt, a coating, an adhesive, a grinding material (grindstone) and other surface treatment agents.

In a preferred embodiment, the surface treatment agent according to the present invention is selected from one or more of (2-aminoethoxy) (tert-butyl) dimethylsilane, (diethylaminomethyl) trimethylsilane, [3- (aminooxy) propoxy ] (dimethyl) (2-methyl-2-propyl) silane, bis (4-aminophenoxy) dimethylsilane, bis (dimethylamino) methylvinylsilane, 3-aminopropyltrimethoxysilane, N- (6-aminohexyl) aminomethyltriethoxysilane, 4-amino-3, 3-dimethylbutyltrimethoxysilane, tetrakis [2- (diethylamino) ethoxy ] silane.

In a more preferred embodiment, the surface treatment agent of the present invention is a combination of N- (6-aminohexyl) aminomethyltriethoxysilane and (diethylaminomethyl) trimethylsilane, wherein the mass ratio of N- (6-aminohexyl) aminomethyltriethoxysilane to (diethylaminomethyl) trimethylsilane is 1: (0.3-1.2).

In a most preferred embodiment, the surface treatment agent of the present invention is a combination of N- (6-aminohexyl) aminomethyltriethoxysilane and (diethylaminomethyl) trimethylsilane, wherein the mass ratio of N- (6-aminohexyl) aminomethyltriethoxysilane to (diethylaminomethyl) trimethylsilane is 1: 0.8.

antioxidant agent

The antioxidants of the present invention are chemical substances which, when present in the polymer system in only small amounts, retard or inhibit the progress of the oxidation process of the polymer, thereby preventing the aging of the polymer and extending its useful life, also known as "age resistors".

In a preferred embodiment, the antioxidant of the present invention is selected from one or more of antioxidant 1010, antioxidant 1076, antioxidant 1135, antioxidant 1098, antioxidant 168, and antioxidant 618.

In a most preferred embodiment, the antioxidant of the present invention is antioxidant 618.

Lubricant agent

The lubricant is used for reducing the friction resistance of a friction pair and slowing down the abrasion of the friction pair. The drawing device is mainly applied to the processes of male die drawing, punching, blanking, bending and the like in the workpiece forming process, and can finish the most difficult deep-drawing male die drawing.

The lubricant has the advantages of prolonging the service life of a die, forming high-strength steel, reducing the cost of raw materials, saving energy, realizing high-efficiency production, increasing the added value and protecting the environment.

In a more preferred embodiment, the lubricant according to the present invention is selected from one or more of oleamide, zinc stearate, erucamide, stearic acid, butyl stearate, calcium stearate, ethylene bis stearamide, polyethylene wax, silicone oil.

In a most preferred embodiment, the lubricant of the present invention is butyl stearate.

In a preferred embodiment, the preparation method comprises at least the following steps:

(2) putting the mixture 1 into a double screw machine for mixing, wherein the mixing is divided into 12 temperature stages, the temperature is respectively 150 ℃, 190 ℃, 180 ℃, 170 ℃ and 170 ℃, 30% of filler is added in the sixth temperature stage, and 20% of filler is added in the eighth temperature stage to obtain a mixture 2;

It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.

In addition, the raw materials used are commercially available from national chemical reagents, unless otherwise specified.

Examples

In order to better understand the above technical solutions, the following detailed descriptions will be provided with reference to specific embodiments. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention. In addition, the raw materials are commercially available and the extraction methods of the extract are all conventional extraction methods, if not otherwise specified.

Example 1

The high-stability light elastomer is provided, and the preparation raw materials comprise the following components in parts by weight: 70 parts of matrix resin, 7 parts of foaming master batch, 30 parts of filler, 2 parts of surface treating agent, 0.6 part of antioxidant and 3 parts of lubricant.

The matrix resin is polyether polyurethane elastomer.

The Shore A hardness of the polyether polyurethane elastomer is 80, the polyether polyurethane elastomer can be obtained from commercial products, and the manufacturer is German Bassfer and the brand is E1180.

The filler is a combination of hollow glass beads and talcum powder, wherein the mass ratio of the hollow glass beads to the talcum powder is 1: 0.3.

the surface treating agent is a combination of N- (6-aminohexyl) aminomethyl triethoxysilane and (diethylaminomethyl) trimethylsilane, wherein the mass ratio of the N- (6-aminohexyl) aminomethyl triethoxysilane to the (diethylaminomethyl) trimethylsilane is 1: 0.8.

the antioxidant is antioxidant 618.

The lubricant is butyl stearate.

The foaming master batch at least comprises the following raw materials in parts by weight: 25 parts of matrix resin, 45 parts of foaming agent, 0.1 part of activating agent, 0.2 part of cross-linking agent, 0.4 part of nucleating agent and 0.3 part of regulator.

The matrix resin is a polyether polyurethane elastomer, which is commercially available from the manufacturer of basf, germany, under the designation E1180.

The foaming agent is a combination of azodicarbonamide and sodium bicarbonate, wherein the mass ratio of the azodicarbonamide to the sodium bicarbonate is 1: 0.7.

the activating agent is zinc stearate.

The nucleating agent is talcum powder.

The regulator is carboxylic acid methyl ester.

The cross-linking agent is dicumyl peroxide.

The preparation method of the foaming master batch comprises the following steps: mixing matrix resin, foaming agent, activating agent, crosslinking agent, nucleating agent and regulator at high speed in a mixer, and extruding in a double-screw extruder at 135 deg.C and main screw rotation speed of 100 r/min.

A method for preparing a high stability lightweight elastomer, the method comprising the steps of:

(1) mixing matrix resin, 50% of filler, surface treating agent, antioxidant and lubricant, and banburying at 185 ℃ for 25min to obtain a mixture 1;

Example 2

The high-stability light elastomer is provided, and the preparation raw materials comprise the following components in parts by weight: 50 parts of matrix resin, 2 parts of foaming master batch, 10 parts of filler, 1 part of surface treating agent, 0.1 part of antioxidant and 1 part of lubricant.

The matrix resin is polyether polyurethane elastomer.

the antioxidant is antioxidant 618.

The lubricant is butyl stearate.

the activating agent is zinc stearate.

The nucleating agent is talcum powder.

The regulator is carboxylic acid methyl ester.

The cross-linking agent is dicumyl peroxide.

Example 3

The high-stability light elastomer is provided, and the preparation raw materials comprise the following components in parts by weight: 85 parts of matrix resin, 10 parts of foaming master batch, 45 parts of filler, 4 parts of surface treating agent, 0.8 part of antioxidant and 6 parts of lubricant.

The matrix resin is polyether polyurethane elastomer.

the antioxidant is antioxidant 618.

The lubricant is butyl stearate.

the activating agent is zinc stearate.

The nucleating agent is talcum powder.

The regulator is carboxylic acid methyl ester.

The cross-linking agent is dicumyl peroxide.

Example 4

The high-stability light elastomer is provided, and the preparation raw materials comprise the following components in parts by weight: 70 parts of matrix resin, 3 parts of foaming agent, 30 parts of filler, 2 parts of surface treating agent, 0.6 part of antioxidant and 3 parts of lubricant.

The matrix resin is polyether polyurethane elastomer.

The polyether urethane elastomer is commercially available from basf, germany under the designation E1180.

the antioxidant is antioxidant 618.

The lubricant is butyl stearate.

The matrix resin is a polyether polyurethane elastomer, which is commercially available from basf, germany, under the designation E1195.

the activating agent is zinc stearate.

The nucleating agent is talcum powder.

The regulator is carboxylic acid methyl ester.

The cross-linking agent is dicumyl peroxide.

Example 5

The high-stability light elastomer is provided, and the preparation raw materials comprise the following components in parts by weight: 70 parts of matrix resin, 3 parts of foaming agent, 20 parts of filler, 2 parts of surface treating agent, 0.6 part of antioxidant and 3 parts of lubricant.

The matrix resin is polyether polyurethane elastomer.

The Shore A hardness of the polyether polyurethane elastomer is 80, the polyether polyurethane elastomer can be obtained commercially, and is manufactured by Germany Basff with the trade name of R1000.

the surface treating agent is (diethylaminomethyl) trimethylsilane.

The antioxidant is antioxidant 618.

The lubricant is butyl stearate.

The matrix resin is a polyether polyurethane elastomer, commercially available from a manufacturer including, but not limited to, basf, germany, under the designation R1000.

the activating agent is zinc stearate.

The nucleating agent is talcum powder.

The regulator is carboxylic acid methyl ester.

The cross-linking agent is dicumyl peroxide.

Example 6

Similar to example 1, except that the filler was talc.

Evaluation of Performance

1. The density of the high stability lightweight elastomers prepared in examples 1 to 7 was determined using a DIN abrasion tester in accordance with GB 9867-2008.

2. The high stability lightweight elastomers prepared in examples 1 to 7 were each allowed to stand at 100 ℃ for 72 hours and tested for tear strength according to ASTM D624 test method.

The test results are shown in table 1 below.

TABLE 1 test results

The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.

Claims

1. The high-stability light elastomer is characterized by comprising the following raw materials in parts by weight: 50-85 parts of matrix resin, 0-10 parts of foaming master batch, 10-45 parts of filler, 1-4 parts of surface treating agent, 0.1-0.8 part of antioxidant and 1-6 parts of lubricant.

2. The high stability lightweight elastomer according to claim 1, wherein said matrix resin is a polyether urethane elastomer.

3. The high-stability light-weight elastomer according to claim 2, wherein the Shore A hardness of the polyether polyurethane elastomer is 70-85.

4. The high-stability light elastomer according to claim 1, wherein the raw materials for preparing the foaming masterbatch at least comprise, in parts by weight: 20-40 parts of matrix resin, 45-65 parts of foaming agent, 0.1-1 part of activating agent, 0.05-1 part of cross-linking agent, 0.2-1.5 parts of nucleating agent and 0.05-1 part of regulator.

5. The high-stability light-weight elastomer according to claim 4, wherein the foaming agent is an azo compound and/or a bicarbonate.

6. The high-stability light elastomer according to claim 1, wherein the filler is selected from one or more of hollow glass microspheres, nano modified montmorillonite, nano silica, nano titanium dioxide, nano calcium carbonate, talcum powder, mica powder, kaolin and barium sulfate.

7. The light weight elastomer of claim 1, wherein the surface treatment agent is selected from one or more of (2-aminoethoxy) (tert-butyl) dimethylsilane, (diethylaminomethyl) trimethylsilane, [3- (aminooxy) propoxy ] (dimethyl) (2-methyl-2-propyl) silane, bis (4-aminophenoxy) dimethylsilane, bis (dimethylamino) methylvinylsilane, 3-aminopropyltrimethoxysilane, N- (6-aminohexyl) aminomethyl triethoxysilane, 4-amino-3, 3-dimethylbutyltrimethoxysilane, and tetrakis [2- (diethylamino) ethoxy ] silane.

8. The high stability light weight elastomer of claim 1, wherein the antioxidant is selected from one or more of antioxidant 1010, antioxidant 1076, antioxidant 1135, antioxidant 1098, antioxidant 168, and antioxidant 618.

9. The high stability light weight elastomer of claim 1, wherein the lubricant is selected from one or more of oleamide, zinc stearate, erucamide, stearic acid, butyl stearate, calcium stearate, ethylene bis stearamide, polyethylene wax, silicone oil.

10. Process for the preparation of a high stability light weight elastomer according to any of claims 1 to 9, characterized in that it comprises at least the following steps: