阅读说明：本技术 一种高弹阻隔泡棉及其制备方法 (High-elastic barrier foam and preparation method thereof ) 是由 冯明 涂军 于 2020-06-29 设计创作，主要内容包括：本发明涉及一种高弹阻隔泡棉及其制备方法,该高阻隔泡棉包括依次热融合为一体的基层、阻隔层和加强层；其中,所述基层按重量份计包括：聚醚多元醇85～95份、二苯基甲烷二异氰酸酯20～35份、发泡剂1～2份、催化剂0.2～0.7份、阻燃剂3-5份、防水剂3-5份和硅油1～6份,其中,所述聚醚多元醇的羟值为75～135；所述阻隔层按重量份计包括：EVA 30-45份,滑石粉4-6份、石灰粉6-8份、磷酸三乙酯10-20份,环氧改性有机硅树脂粉末32-42份、苯丙乳液10-12份、聚羧酸钠分散剂0.3-1份；所述加强层按重量份计包括：聚氨酯90-95份,氢氧化镁5-10份。其显著提高了泡棉的拉伸强度、断裂伸长率、撕裂强度等性能,同时使得泡棉具有一定的阻隔作用,从而扩大泡棉的适用范围和产品的性能。(The invention relates to a high-elastic barrier foam and a preparation method thereof, wherein the high-elastic barrier foam comprises a base layer, a barrier layer and a reinforcing layer which are sequentially thermally fused into a whole; wherein the base layer comprises the following components in parts by weight: 85-95 parts of polyether polyol, 20-35 parts of diphenylmethane diisocyanate, 1-2 parts of a foaming agent, 0.2-0.7 part of a catalyst, 3-5 parts of a flame retardant, 3-5 parts of a waterproof agent and 1-6 parts of silicone oil, wherein the hydroxyl value of the polyether polyol is 75-135 parts; the barrier layer comprises the following components in parts by weight: 30-45 parts of EVA (ethylene-vinyl acetate), 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant; the reinforcing layer comprises the following components in parts by weight: 90-95 parts of polyurethane and 5-10 parts of magnesium hydroxide. The foam has the advantages that the tensile strength, the elongation at break, the tearing strength and other properties of the foam are obviously improved, and the foam has a certain barrier effect, so that the application range of the foam and the properties of products are expanded.)

1. A high-elastic barrier foam is characterized by comprising a base layer, a barrier layer and a reinforcing layer which are sequentially thermally fused into a whole;

wherein the base layer comprises the following components in parts by weight: 85-95 parts of polyether polyol, 20-35 parts of diphenylmethane diisocyanate, 1-2 parts of a foaming agent, 0.2-0.7 part of a catalyst, 3-5 parts of a flame retardant, 3-5 parts of a waterproof agent and 1-6 parts of silicone oil, wherein the hydroxyl value of the polyether polyol is 75-135 parts;

the barrier layer comprises the following components in parts by weight: 30-45 parts of EVA (ethylene-vinyl acetate), 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant;

the reinforcing layer comprises the following components in parts by weight: 90-95 parts of polyurethane and 5-10 parts of magnesium hydroxide.

2. The high-elasticity barrier foam as claimed in claim 1, wherein the base layer comprises, in parts by weight: 90 parts of polyether polyol, 28 parts of diphenylmethane diisocyanate, 2 parts of foaming agent, 0.5 part of catalyst, 4 parts of flame retardant, 4 parts of waterproof agent and 3 parts of silicone oil, wherein the hydroxyl value of the polyether polyol is 90.

3. The high-elasticity barrier foam as claimed in claim 1, wherein adhesives are arranged between the base layer and the flame retardant layer and between the flame retardant layer and the reinforcing layer, and the adhesives are hot-melted to bond the two adjacent layers.

4. The high-elasticity barrier foam as claimed in claim 3, wherein the binder comprises, in parts by weight: 35-50 parts of silicon rubber, 15-30 parts of acrylic resin, 60-90 parts of polypropylene, 10-20 parts of carbon fiber, 5-8 parts of a waterproof agent, 3-5 parts of an antioxidant, 10-18 parts of a plasticizer and 20-35 parts of nano silicon dioxide.

5. The high-elasticity barrier foam as claimed in claim 1, wherein the barrier layer comprises, in parts by weight: 30-45 parts of EVA, 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant.

6. The high-elasticity barrier foam as claimed in claim 1, wherein the flame retardant is bromine

A halogen-based flame retardant, a phosphorus-based flame retardant.

7. The high resilience barrier foam of claim 1, wherein the catalyst is one or more of stannous octoate, stannous isooctanoate, and dibutyltin dilaurate.

8. A method for preparing the high-elasticity barrier foam as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps:

s1: mixing and foaming 85-95 parts of polyether polyol, 20-35 parts of diphenylmethane diisocyanate, 1-2 parts of a foaming agent, 0.2-0.7 part of a catalyst, 3-5 parts of a flame retardant, 3-5 parts of a waterproof agent and 1-6 parts of silicone oil, wherein the polyether polyol is prepared by mixing and foaming materials with a hydroxyl value of 75-135 to prepare a base layer;

s2: mixing and foaming 30-45 parts of EVA, 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant to prepare a barrier layer;

s3: mixing and foaming 90-95 parts of polyurethane and 5-10 parts of magnesium hydroxide to prepare a reinforcing layer;

s4: and (3) laminating the base layer, the barrier layer and the reinforcing layer prepared in the steps S1-S3, and heating to 60-65 ℃, so that the base layer, the barrier layer and the reinforcing layer are hot-melted into a whole, and the high-elasticity barrier foam is obtained.

9. The method as claimed in claim 8, wherein the step S1, before the material mixing and foaming, further comprises:

and (3) dehydrating the polyether polyol in vacuum at the temperature of 30-140 ℃, and enabling the moisture content of the polyether polyol to be lower than 0.3%.

10. The method of claim 9, wherein in step S1, the temperature of the material mixing and foaming is 80-90 ℃ and the reaction time is 5-20 min.

Technical Field

The invention relates to the technical field of artificially synthesized materials, in particular to high-elastic barrier foam and a preparation method thereof.

Background

With the rapid development of economic construction, people are developing new materials. The foam material is widely applied to household articles and building engineering. For common foam, the tensile strength, elongation at break and tear strength of the material are poor, so that the material cannot meet the use requirements in many application occasions with higher requirements on strength. Meanwhile, when the foam is applied to electronic products or buildings, the foam cannot effectively block water, fire or radiation, so that the application range of the product is limited.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide high-elasticity barrier foam and a preparation method thereof, so that the properties of the foam, such as tensile strength, elongation at break, tearing strength and the like, are improved, and the foam has a certain barrier effect, so that the application range of the foam and the properties of products are expanded.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention provides high-elastic barrier foam, which comprises a base layer, a barrier layer and a reinforcing layer which are sequentially thermally fused into a whole;

wherein the base layer comprises the following components in parts by weight: 85-95 parts of polyether polyol, 20-35 parts of diphenylmethane diisocyanate, 1-2 parts of a foaming agent, 0.2-0.7 part of a catalyst, 3-5 parts of a flame retardant, 3-5 parts of a waterproof agent and 1-6 parts of silicone oil, wherein the hydroxyl value of the polyether polyol is 75-135 parts;

the barrier layer comprises the following components in parts by weight: 30-45 parts of EVA (ethylene-vinyl acetate), 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant;

the reinforcing layer comprises the following components in parts by weight: 90-95 parts of polyurethane and 5-10 parts of magnesium hydroxide.

Further, the base layer comprises the following components in parts by weight: 90 parts of polyether polyol, 28 parts of diphenylmethane diisocyanate, 2 parts of foaming agent, 0.5 part of catalyst, 4 parts of flame retardant, 4 parts of waterproof agent and 3 parts of silicone oil, wherein the hydroxyl value of the polyether polyol is 90.

Furthermore, adhesives are arranged between the base layer and the flame-retardant layer and between the flame-retardant layer and the reinforcing layer, and the two adjacent layers are bonded after the adhesives are hot-melted.

Further, the binder comprises the following components in parts by weight: 35-50 parts of silicon rubber, 15-30 parts of acrylic resin, 60-90 parts of polypropylene, 10-20 parts of carbon fiber, 5-8 parts of a waterproof agent, 3-5 parts of an antioxidant, 10-18 parts of a plasticizer and 20-35 parts of nano silicon dioxide.

Further, the barrier layer comprises the following components in parts by weight: 30-45 parts of EVA, 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant.

Further, the flame retardant is bromine

A halogen-based flame retardant, a phosphorus-based flame retardant.

Further, the catalyst is one or more of stannous octoate, stannous isooctanoate and dibutyltin dilaurate.

The invention also provides a preparation method of the high-elasticity barrier foam, which comprises the following steps:

s1: mixing and foaming 85-95 parts of polyether polyol, 20-35 parts of diphenylmethane diisocyanate, 1-2 parts of a foaming agent, 0.2-0.7 part of a catalyst, 3-5 parts of a flame retardant, 3-5 parts of a waterproof agent and 1-6 parts of silicone oil, wherein the polyether polyol is prepared by mixing and foaming materials with a hydroxyl value of 75-135 to prepare a base layer;

s2: mixing and foaming 30-45 parts of EVA, 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant to prepare a barrier layer;

s3: mixing and foaming 90-95 parts of polyurethane and 5-10 parts of magnesium hydroxide to prepare a reinforcing layer;

s4: and (3) laminating the base layer, the barrier layer and the reinforcing layer prepared in the steps S1-S3, and heating to 60-65 ℃, so that the base layer, the barrier layer and the reinforcing layer are hot-melted into a whole, and the high-elasticity barrier foam is obtained.

Further, in step S1, before the material is mixed and foamed, the method further includes:

and (3) dehydrating the polyether polyol in vacuum at the temperature of 30-140 ℃, and enabling the moisture content of the polyether polyol to be lower than 0.3%.

Further, in step S1, the temperature for mixing and foaming the material is 80-90 ℃, and the reaction time is 5-20 min.

The technical scheme provided by the invention has the following beneficial effects: the invention creatively provides high-elasticity blocking foam, which integrates a foamed high-elasticity base layer and a blocking layer with a radiation isolation effect in a hot melting mode, and components of a waterproof agent and a flame retardant are added into the high-elasticity base layer, so that the tensile strength, the elongation at break, the tearing strength and other properties of the foam are obviously improved, meanwhile, the foam has a certain blocking effect, and the application range and the product properties of the foam are expanded.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. The experimental procedures in the following examples are conventional unless otherwise specified. The test materials used in the following examples were purchased from a conventional reagent store unless otherwise specified. In the quantitative tests in the following examples, three replicates were set, and the data are the mean or the mean ± standard deviation of the three replicates.

The invention provides high-elastic barrier foam, which comprises a base layer, a barrier layer and a reinforcing layer which are sequentially thermally fused into a whole; wherein the base layer comprises the following components in parts by weight: 85-95 parts of polyether polyol, 20-35 parts of diphenylmethane diisocyanate, 1-2 parts of a foaming agent, 0.2-0.7 part of a catalyst, 3-5 parts of a flame retardant, 3-5 parts of a waterproof agent and 1-6 parts of silicone oil, wherein the hydroxyl value of the polyether polyol is 75-135 parts; the barrier layer comprises the following components in parts by weight: 30-45 parts of EVA (ethylene-vinyl acetate), 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant; the reinforcing layer comprises the following components in parts by weight: 90-95 parts of polyurethane and 5-10 parts of magnesium hydroxide.

The flame retardant can be a brominated flame retardant, a halogenated flame retardant or a phosphorus flame retardant, and the catalyst is one or more of stannous octoate, stannous isooctanoate and dibutyltin dilaurate.

Preferably, the base layer comprises, in parts by weight: 90 parts of polyether polyol, 28 parts of diphenylmethane diisocyanate, 2 parts of foaming agent, 0.5 part of catalyst, 4 parts of flame retardant, 4 parts of waterproof agent and 3 parts of silicone oil, wherein the hydroxyl value of the polyether polyol is 90.

In order to improve the reliability and the effect of thermal bonding between the layers and avoid delamination in the using process, adhesives are arranged between the base layer and the flame-retardant layer and between the flame-retardant layer and the reinforcing layer, and the two adjacent layers are bonded after the adhesives are hot-melted. Specifically, the binder comprises the following components in parts by weight: 35-50 parts of silicon rubber, 15-30 parts of acrylic resin, 60-90 parts of polypropylene, 10-20 parts of carbon fiber, 5-8 parts of a waterproof agent, 3-5 parts of an antioxidant, 10-18 parts of a plasticizer and 20-35 parts of nano silicon dioxide.

The barrier layer comprises the following components in parts by weight: 30-45 parts of EVA, 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant.

In order to prepare the high-elasticity barrier foam, the invention also provides a preparation method, which comprises the following steps:

s1: mixing and foaming 85-95 parts of polyether polyol, 20-35 parts of diphenylmethane diisocyanate, 1-2 parts of a foaming agent, 0.2-0.7 part of a catalyst, 3-5 parts of a flame retardant, 3-5 parts of a waterproof agent and 1-6 parts of silicone oil, wherein the polyether polyol is prepared by mixing and foaming materials with a hydroxyl value of 75-135 to prepare a base layer; wherein the temperature for mixing and foaming the materials is 80-90 ℃, and the reaction time is 5-20 min.

S2: mixing and foaming 30-45 parts of EVA, 4-6 parts of talcum powder, 6-8 parts of lime powder, 10-20 parts of triethyl phosphate, 32-42 parts of epoxy modified organic silicon resin powder, 10-12 parts of styrene-acrylic emulsion and 0.3-1 part of sodium polycarboxylate dispersant to prepare a barrier layer;

s3: mixing and foaming 90-95 parts of polyurethane and 5-10 parts of magnesium hydroxide to prepare a reinforcing layer;

s4: and (3) laminating the base layer, the barrier layer and the reinforcing layer prepared in the steps S1-S3, and heating to 60-65 ℃, so that the base layer, the barrier layer and the reinforcing layer are hot-melted into a whole, and the high-elasticity barrier foam is obtained.

Further, in order to improve the foaming performance of the material, the material before mixed foaming further comprises: and (3) dehydrating the polyether polyol at 30-140 ℃ in vacuum, and enabling the moisture content of the polyether polyol to be lower than 0.3%.

The technical solution provided by the present invention is further illustrated below with reference to specific examples.