CN115160938A - High-strength and high-modulus PVB film and preparation method thereof - Google Patents

Abstract

The invention discloses a high-strength and high-modulus PVB film, which is characterized in that: the PVB film is prepared by uniformly mixing a main material, a crosslinking agent and functional auxiliary materials and being melt-extruded by a twin-screw extruder; The main material includes PVB resin powder and plasticizer; the functional auxiliary materials include adhesion regulator, antioxidant and anti-ultraviolet agent; the mass percentage ratio of the PVB resin powder, plasticizer and crosslinking agent It is: PVB resin powder 72%-77%, plasticizer 22%-29%, cross-linking agent 0.5%-2%. By adopting the present invention, the cross-linking agent and the hydroxyl group on the PVB molecular chain undergo bridging reaction to realize the micro-cross-linking of the internal structure of the material, and the adhesive force regulator is added to improve the adhesive performance of the material and control the degree of cross-linking. The structure improves the strength and modulus of the material; the PVB film prepared by the invention is used for the production of laminated glass, and the product has good performance and strong practicability.

Description

A kind of high-strength, high-modulus PVB film and preparation method thereof

technical field

The invention belongs to a polyvinyl butyral (PVB) film material and preparation thereof, and relates to a high-strength, high-modulus PVB film and a preparation method thereof. The high-strength and high-modulus PVB film prepared by the invention is suitable for safety laminated glass products of automobiles and buildings.

Background technique

Plus)，简称SGP，由于其优越的力学性能，越来越多地应用于夹层玻璃之中，现有技术中的PVB无法满足日益多元化的夹层玻璃运用需求，在高性能的幕墙夹层玻璃等领域无法与SGP竞争，需要对PVB改性以满足需求。Polyvinyl Butyral (PVB for short), thermoplastic elastomer has nonlinear viscoelastic properties, showing excellent transparency, cold resistance, deformability and UV radiation resistance, etc. It is widely used in automobiles , Building safety laminated glass products. In recent years, a new type of ionic interlayer material (

Plus), referred to as SGP, is more and more used in laminated glass due to its superior mechanical properties. PVB in the existing technology cannot meet the increasingly diversified application requirements of laminated glass. The field cannot compete with SGP, and PVB needs to be modified to meet demand.

The intermolecular force affects the tensile strength of PVB, and the intermolecular free volume affects the impact strength of PVB. The addition of non-reactive organic and inorganic additives can improve the mechanical properties of the material. The addition of nanoparticles has a poor dispersion effect due to the aggregation effect, and the mechanical properties improvement effect is poor. At the same time, the optical properties of the material will be reduced. Add reactive additives to control the degree of reaction through chain extension, micro-crosslinking, etc., and improve the properties of the material without affecting the processing performance. In the prior art, CN102174238A discloses "a formula for preparing high-strength PVB sheet", which is to add phthalic anhydride during the extrusion process to extend the molecular chain, which improves the mechanical properties of PVB, but the Due to the influence of the barrier effect, the esterification reaction efficiency is not high, and the aromatic compounds are easily oxidized and yellowed during transportation and storage, and the production of adding them into the PVB film will affect its optical properties. CN109207085A discloses "a kind of polyvinyl butyral film with high tear strength and its production method", which has excellent adhesion and tear resistance through reactive extrusion and grafting branched compounds to PVB molecular chains However, the introduced non-polar molecular carbon chain has poor compatibility with polar plasticizers, which will lead to the precipitation of plasticizers during film processing and affect the performance of PVB.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and to provide a high-strength, high-modulus PVB film and a preparation method thereof. The present invention provides a high-strength and high-modulus PVB film applied to the production of high-performance safety laminated glass and a preparation method thereof, aiming at the low strength and modulus of the existing PVB film, which cannot meet the production requirements of high-performance safety laminated glass. .

The content of the present invention is: a high-strength, high-modulus PVB film, which is characterized in that: the PVB film is prepared by mixing the main material, the cross-linking agent and the functional auxiliary materials uniformly through a twin-screw extruder to cast a film. ;

The main material includes PVB resin powder and plasticizer; the functional auxiliary material includes adhesion regulator, antioxidant and anti-ultraviolet agent;

The mass percentage ratio of the PVB resin powder, plasticizer and cross-linking agent is: PVB resin powder 72%-77%, plasticizer 22%-29%, cross-linking agent 0.5%-2%, and each group The sum of the points (ie: the sum of PVB resin powder, plasticizer and crosslinking agent) is 100%.

The manufacturer names and product models of the PVB resin powder are: Dongcai Technology Group Co., Ltd. DFS1719-01, DFS1719-03, DFS1719-04, DFS1719-06, etc.

In the content of the present invention: the addition amount of the adhesion regulator is 0.08% to 0.3% of the mass of the main material, the addition amount of the antioxidant is 0.1% to 0.8% of the mass of the main material, and the addition amount of the anti-ultraviolet agent It is 0.1% to 0.4% of the mass of the main material.

In the content of the present invention, the cross-linking agent is composed of a main cross-linking agent and a curing agent, and the mass ratio of the main cross-linking agent and the curing agent is 4:1 to 1:1.

The main crosslinking agent is an acrylate or methacrylate with a molecular weight of less than 500 and at least one hydroxyl group in the molecular chain; the curing agent is a diisocyanate or a biepoxy compound;

The main cross-linking agent may specifically be: hydroxypropyl acrylate, 4-hydroxybutyl acrylate, cyclotrimethylolpropane methylal acrylate, hydroxyethyl methacrylate, 2,3-dihydroxypropyl acrylate One or more mixtures of esters and the like.

In the content of the present invention: the cross-linking agent can also be added with peroxide (the main cross-linking agent needs to add peroxide to initiate cross-linking polymerization); the added (used) amount of the peroxide is the cross-linking agent. 0.4% to 1% of the mass of the joint agent.

In the content of the present invention: the peroxide is: benzoyl peroxide, lauroyl peroxide, tert-butyl peroxybenzoate, diisopropyl peroxydicarbonate, cumene hydroperoxide, peroxide One or more mixtures of di-tert-butyl and tert-butyl hydroperoxide.

In the content of the present invention: the diisocyanates are: toluene diisocyanate (referred to as TDI), isophorone diisocyanate (referred to as IPDI), diphenylmethane diisocyanate (referred to as MDI), hexamethylene diisocyanate ( One or more mixtures of lysine diisocyanate (referred to as HDI) and lysine diisocyanate (referred to as LDI);

Described biepoxy compound is: bisphenol A epoxy resin, tetrahydrophthalic acid diglycidyl ester, 1,4-butanediol diglycidyl ether, polyethylene glycol diene oxide One or more mixtures of methyl ether and 1,4-dioxane.

In the content of the present invention: the plasticizers are: dioctyl sebacate (abbreviated as DOS), dibutyl sebacate (abbreviated as DBS), triethylene glycol diisocaprylate (abbreviated as 3G8), hexamethylene One or more mixtures of dibutyl acid (DBA for short) and diisobutyl adipate (DIBA for short).

In the content of the present invention: the adhesive force regulator is: one or more mixtures of magnesium acetate, calcium acetate, zinc acetate, zinc oxalate, and magnesium oxalate (the preferred adhesive force regulator is zinc acetate) , magnesium acetate);

The antioxidants are: antioxidant 1010, antioxidant 1076, antioxidant 3114, antioxidant 300, one or a mixture of two or more (preferable antioxidants are antioxidant 1010, antioxidant 1076 );

The anti-ultraviolet agent is: one or more mixtures of UV-P, UV-326, UV-329, UV-234, GW-540, HPT (preferable anti-ultraviolet agents are UV-360, GW-540 ).

In the content of the present invention, the high-strength, high-modulus PVB film is prepared by mixing the main components, cross-linking agent and functional auxiliary materials uniformly through a twin-screw extruder to form a film by casting.

The names and models of the manufacturers of the twin-screw extruder are: Nanjing Meiya Rubber and Plastic Machinery Manufacturing Co., Ltd. MYSJ-52/65/75; Guangzhou Putong Experimental Analysis Instrument Co., Ltd. MECU-35/80; Dongguan Jingchuang Da Machinery Technology Co., Ltd. JC-95/135, etc.; process parameters of melt extrusion: processing temperature: feeding section 30-40 ℃, compression section 160-175 ℃, homogenization section 175-185 ℃, head and die section 190-210℃; die pressure 7-13MPa; extrusion rate 950-1350kg/h.

Weigh each component according to the amount of PVB resin, plasticizer, cross-linking agent, peroxide, functional auxiliary (auxiliary) in the above PVB film, cross-linking agent, peroxide, functional auxiliary (auxiliary) ) After mixing evenly by a mixer, use a metering pump to add it into a twin-screw extruder, under the action of the extruder screw, evenly mix with the melted and plasticized PVB resin powder, and mix, extrude and cast through the extruder to prepare PVB film. ; In the process of processing and preparation, the temperature of each section of the twin-screw extruder is preferably a gradient temperature. From the feed port of the twin-screw extruder to the vacuum port, the temperature increases in turn to prevent the initial processing section from being too high and reacting. Excessive speed and excessive local cross-linking lead to blockage of the extruder die and affect PVB processing performance.

Compared with the prior art, the present invention has the following features and beneficial effects:

(1) adopting the components and proportioning of the present invention, the plasticizer affects the processability and mechanical properties of PVB; the cross-linking agent affects the cross-linking degree of PVB, and when adding too much, it will cause the film to be in poor shape and difficult to handle; The cross-linking agent is cured and reinforced by the curing agent; the functional auxiliary material affects the functionality; the organic matter in the cross-linking agent and the functional auxiliary material selected in the present invention has good compatibility with the plasticizer, and the refractive index is similar to that of the PVB resin. The materials participating in the reaction are uniformly dispersed in the material and will not affect the optical properties of the PVB film; the graft polymerization is initiated by peroxide; the addition of functional accessories increases the adhesion, oxidation resistance and weather resistance of the PVB film; Peroxide initiates the grafting of acrylate and methacrylate main cross-linking agents to the PVB molecular chain, and the peroxide initiator activates the double bond, attacks the PVB molecular chain, and realizes bridging between the PVB molecular chains. The selected acrylate, The methacrylate main crosslinking agent contains hydroxyl groups, which introduce activating groups into the system, and at the same time form hydrogen bonds to increase intermolecular forces; PVB resin molecular chain has active side hydroxyl groups, isocyanate groups, epoxy groups in the Under the action of high heat and high pressure, the extruder reacts with hydroxyl groups to form a similar three-dimensional network structure. There are ether bonds, ester groups and other groups in the crosslinking agent molecule. The crosslinking structure can be swelled by plasticizers. The degree of phase separation is low, showing excellent optical properties, cross-linked chemical bond structure, PVB film shows high strength and high modulus;

(2) By adopting the present invention, the micro-crosslinking of the internal structure of the material is realized by adding a crosslinking agent and a bridging reaction with the hydroxyl groups on the PVB molecular chain. The crosslinking agent contains ether bonds, ester groups and plasticizers. , improve the mechanical properties of PVB film without losing the optical properties of the material; add adhesive force regulators to improve the adhesive properties of the material while controlling the degree of cross-linking, the cross-linked structure of the material improves the strength and modulus of the material; In the twin-screw extrusion process, cross-linking modification is carried out to improve the strength and modulus of the material, and maintain high transparency; the film prepared by the method of the invention is used for the production of laminated glass, and the obtained product has excellent performance and good use. and economic value;

(3) The preparation process of the invention is simple, easy to operate, good product performance, light transmittance≥88%, haze≤0.5, modulus higher than 20MPa, strength higher than 31MPa, and strong practicability.

Detailed ways

The following examples are intended to further illustrate the present invention, but should not be construed as limiting the protection scope of the present invention. Some non-essential improvements and adjustments made to the present invention by those skilled in the art according to the above-mentioned content of the present invention still belong to protection scope of the present invention.

In the following Examples 1-10, the unit of consumption of each raw material component "parts" are all parts by mass (all are grams or all are kilograms).

Example 1:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 69 parts of PVB resin powder, 30 parts of triethylene glycol diisocaprylate, 0.5 part of hydroxypropyl acrylate, and 0.5 part of isophorone diisocyanate, 0.1 part of diisopropyl peroxydicarbonate, 0.1 part of magnesium acetate, 0.1 part of UV-234, 0.5 part of antioxidant 1076, put into a twin-screw extruder, mixed, melted, extruded and cast into a film to obtain high Strength, high modulus PVB film;

The twin-screw extruder is a JC-135 twin-screw extruder. The extrusion temperature is: 35°C in the feeding section, 160°C in the compression section, 182°C in the homogenization section, and 195°C in the die section and the die section; The head pressure is 11MPa; the extrusion volume is 1000kg/h.

Example 2:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 72 parts of PVB resin powder, 25 parts of triethylene glycol diisocaprylate, 1 part of 4-hydroxybutyl acrylate, and 1 part of lysine diisocyanate 0.1 part of lauroyl peroxide, 0.1 part of calcium acetate, 0.1 part of UV-234, 0.5 part of antioxidant 1010, put into a twin-screw extruder, mix, melt, extrude and cast a film to obtain high-strength, High modulus PVB film;

The twin-screw extruder is a JC-95 twin-screw extruder. The extrusion temperature is 35°C in the feeding section, 165°C in the compression section, 185°C in the homogenization section, and 190°C in the die section and the die section; The head pressure is 8MPa; the extrusion volume is 950kg/h.

Example 3:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 70 parts of PVB resin powder, 26 parts of triethylene glycol diisocaprylate, 1 part of cyclotrimethylolpropane methyl acrylate, hexamethylene 1 part of methyl diisocyanate, the rest of the raw material components and the amount added and the processing and preparation method are the same as those in Example 1, which are omitted.

Example 4:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 70 parts of PVB resin powder, 26 parts of triethylene glycol diisocaprylate, 0.3 part of cyclotrimethylolpropane methyl acrylate, lysine 1 part of acid diisocyanate, the rest of the raw material components and the addition amount and the processing and preparation method are the same as those in Example 1, which are omitted.

Example 5:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 69 parts of PVB resin powder, 28 parts of triethylene glycol diisocaprylate, 1 part of hydroxyethyl methacrylate, and 1 part of isophorone diisocyanate The remaining raw material components and addition amounts are the same as those in Example 1, and are omitted from the processing and preparation method.

Example 6:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 71 parts of PVB resin powder, 26 parts of triethylene glycol diisocaprylate, 1 part of hydroxyethyl methacrylate, polyethylene glycol diepoxide 1 part of ethane methyl ether, the rest of the raw material components and the amount added and the processing and preparation method are the same as those in Example 1, which are omitted.

Example 7:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 76 parts of PVB resin powder, 24 parts of triethylene glycol diisocaprylate, 1 part of 4-hydroxybutyl acrylate, polyethylene glycol bicyclic 1 part of oxyethane methyl ether, the rest of the raw material components and the addition amount and the processing and preparation method are the same as those in Example 1, which are omitted.

Example 8:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 75 parts of PVB resin powder, 23 parts of triethylene glycol diisooctanoate, 0.5 part of 4-hydroxybutyl acrylate, 1,4-butanediol 1 part of alcohol diglycidyl ether, the rest of the raw material components and the addition amount and the processing and preparation method are the same as those in Example 1, which are omitted.

Example 9:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 73 parts of PVB resin powder, 25 parts of triethylene glycol diisocaprylate, 1 part of hydroxyethyl methacrylate, polyethylene glycol diepoxide 1 part of ethane methyl ether, the rest of the raw material components and the amount added and the processing and preparation method are the same as those in Example 1, which are omitted.

Example 10:

A high-strength, high-modulus PVB film and a preparation method thereof, comprising 74 parts of PVB resin powder, 24 parts of triethylene glycol diisocaprylate, 1 part of 2,3-dihydroxypropyl acrylate, polyethylene glycol 1 part of ethylene oxide methyl ether, the rest of the raw material components and the addition amount and the processing and preparation method are the same as those in Example 1, and are omitted.

The high-strength, high-modulus PVB film (product) prepared in the embodiment of the present invention 10 and the existing ordinary PVB film are shown in the following table as the test data comparison of the ionic interlayer SGP:

project product of the present invention Ordinary PVB film SGP Tensile strength (MPa) 35 26 34.5 Elastic Modulus (MPa) 200 50 300 Tear Strength(KN/m) 126 35 135 Failure strain (%) 360 300 400 Haze (%) 0.3 0.4 0.4 Yellowness Index (%) 1 8 2 Transmittance(%) 89 86 90

Example 11:

A high-strength, high-modulus PVB film, the PVB film is prepared by mixing a main material, a cross-linking agent and a functional auxiliary material uniformly and being melt-extruded by a twin-screw extruder;

The main material includes PVB resin powder and plasticizer; the functional auxiliary material includes adhesion regulator, antioxidant and anti-ultraviolet agent;

The mass percentage ratio of the PVB resin powder, the plasticizer and the cross-linking agent is: 69% of the PVB resin powder, 30% of the plasticizer, and 1% of the cross-linking agent.

Example 12:

A high-strength, high-modulus PVB film, the PVB film is prepared by mixing a main material, a cross-linking agent and a functional auxiliary material uniformly and being melt-extruded by a twin-screw extruder;

The main material includes PVB resin powder and plasticizer; the functional auxiliary material includes adhesion regulator, antioxidant and anti-ultraviolet agent;

The mass percentage ratio of the PVB resin powder, the plasticizer and the cross-linking agent is: 77% of the PVB resin powder, 20% of the plasticizer, and 3% of the cross-linking agent.

Example 13:

A high-strength, high-modulus PVB film, the PVB film is prepared by mixing a main material, a cross-linking agent and a functional auxiliary material uniformly and being melt-extruded by a twin-screw extruder;

The main material includes PVB resin powder and plasticizer; the functional auxiliary material includes adhesion regulator, antioxidant and anti-ultraviolet agent;

The mass percentage ratio of the PVB resin powder, the plasticizer and the cross-linking agent is: 73% of the PVB resin powder, 26.5% of the plasticizer, and 0.5% of the cross-linking agent.

Example 14:

A high-strength, high-modulus PVB film, the PVB film is prepared by mixing a main material, a cross-linking agent and a functional auxiliary material uniformly and being melt-extruded by a twin-screw extruder;

The main material includes PVB resin powder and plasticizer; the functional auxiliary material includes adhesion regulator, antioxidant and anti-ultraviolet agent;

The mass percentage ratio of the PVB resin powder, the plasticizer and the cross-linking agent is: 72% of the PVB resin powder, 27.9% of the plasticizer, and 0.1% of the cross-linking agent.

Example 15:

A high-strength, high-modulus PVB film, the PVB film is prepared by mixing a main material, a cross-linking agent and a functional auxiliary material uniformly and being melt-extruded by a twin-screw extruder;

The main material includes PVB resin powder and plasticizer; the functional auxiliary material includes adhesion regulator, antioxidant and anti-ultraviolet agent;

The mass percentage ratio of the PVB resin powder, the plasticizer and the cross-linking agent is: 76% of the PVB resin powder, 22% of the plasticizer, and 2% of the cross-linking agent.

Example 16:

A high-strength, high-modulus PVB film, the PVB film is prepared by mixing a main material, a cross-linking agent and a functional auxiliary material uniformly and being melt-extruded by a twin-screw extruder;

The main material includes PVB resin powder and plasticizer; the functional auxiliary material includes adhesion regulator, antioxidant and anti-ultraviolet agent;

The mass percentage ratio of the PVB resin powder, the plasticizer and the cross-linking agent is: 74% of the PVB resin powder, 25% of the plasticizer, and 1% of the cross-linking agent.

Example 17:

A high-strength, high-modulus PVB film, the addition amount of the adhesion regulator is 0.01% of the mass of the main material, the addition amount of the antioxidant is 0.1% of the mass of the main material, and the addition amount of the anti-ultraviolet agent is 0.01% of the mass of the main material. It is 0.05% of the mass of the main material; the others are the same as any of the embodiments 11-16, and are omitted.

Example 18:

A high-strength and high-modulus PVB film, the addition amount of the adhesive force regulator is 0.5% of the mass of the main material, the addition amount of the antioxidant is 1% of the mass of the main material, and the addition amount of the anti-ultraviolet agent is 0.5% of the mass of the main material. It is 0.5% of the mass of the main material; the others are the same as any of the embodiments 11-16, and are omitted.

Example 19:

A high-strength, high-modulus PVB film, the adhesive force regulator is added in an amount of 0.25% of the mass of the main material, the antioxidant is added in an amount of 0.5% of the mass of the main material, and the anti-ultraviolet agent is added in an amount of 0.25%. It is 0.27% of the mass of the main material; the others are the same as any of the embodiments 11-16, and are omitted.

Example 20:

A high-strength, high-modulus PVB film, the addition amount of the adhesion regulator is 0.08% of the mass of the main material, the addition amount of the antioxidant is 0.1% of the mass of the main material, and the addition amount of the anti-ultraviolet agent is 0.08%. It is 0.1% of the mass of the main body material; the others are the same as any of the embodiments 11-16, and are omitted.

Example 21:

A high-strength, high-modulus PVB film, the addition amount of the adhesion regulator is 0.3% of the mass of the main material, the addition amount of the antioxidant is 0.8% of the mass of the main material, and the addition amount of the anti-ultraviolet agent is 0.3% of the mass of the main material. It is 0.4% of the mass of the main material; the others are the same as any of the embodiments 11-16, and are omitted.

Example 22:

A high-strength and high-modulus PVB film, the addition amount of the adhesion regulator is 0.18% of the mass of the main material, the addition amount of the antioxidant is 0.45% of the mass of the main material, and the addition amount of the anti-ultraviolet agent is 0.18%. It is 0.24% of the mass of the main material; the others are the same as any of the embodiments 11-16, and are omitted.

Example 23:

A high-strength, high-modulus PVB film, the cross-linking agent is composed of a main cross-linking agent and a curing agent, and the mass ratio of the main cross-linking agent and the curing agent is 4:1; Either, omit.

Example 24:

A high-strength, high-modulus PVB film, the cross-linking agent is composed of a main cross-linking agent and a curing agent, and the mass ratio of the main cross-linking agent and the curing agent is 3:1; Either, omit.

Example 25:

A high-strength, high-modulus PVB film, the cross-linking agent is composed of a main cross-linking agent and a curing agent, and the mass ratio of the main cross-linking agent and the curing agent is 2:1; Either, omit.

Example 26:

A high-strength, high-modulus PVB film, the cross-linking agent is composed of a main cross-linking agent and a curing agent, and the mass ratio of the main cross-linking agent and the curing agent is 1:1; Either, omit.

Example 27:

A high-strength, high-modulus PVB film, the cross-linking agent is also added with peroxide (the main cross-linking agent needs to add peroxide to initiate cross-linking polymerization); the addition of the peroxide ( The amount used is 0.1% of the mass of the cross-linking agent; the others are the same as any of the examples 11-26, and are omitted.

Example 28:

A high-strength, high-modulus PVB film, the cross-linking agent is also added with peroxide (the main cross-linking agent needs to add peroxide to initiate cross-linking polymerization); the addition of the peroxide ( The amount used is 1% of the mass of the cross-linking agent; the others are the same as any of the examples 11-26, and are omitted.

Example 29:

A high-strength, high-modulus PVB film, the cross-linking agent is also added with peroxide (the main cross-linking agent needs to add peroxide to initiate cross-linking polymerization); the addition of the peroxide ( The amount used is 0.55% of the mass of the cross-linking agent; the others are the same as any of the embodiments 11-26, and are omitted.

Example 30:

A high-strength, high-modulus PVB film, the cross-linking agent is also added with peroxide (the main cross-linking agent needs to add peroxide to initiate cross-linking polymerization); the addition of the peroxide ( The amount used is 0.4% of the mass of the cross-linking agent; the others are the same as any of the embodiments 11-26, and are omitted.

Example 31:

A high-strength, high-modulus PVB film, the cross-linking agent is also added with peroxide (the main cross-linking agent needs to add peroxide to initiate cross-linking polymerization); the addition of the peroxide ( The amount used is 0.7% of the mass of the cross-linking agent; the others are the same as any of the embodiments 11-26, and are omitted.

In the above examples 11-31: the manufacturer names and product models of the PVB resin powder are: Dongcai Technology Group Co., Ltd. DFS1719-01, DFS1719-03, DFS1719-04, DFS1719-06, etc.

In the above examples 11-31: the main crosslinking agent is an acrylate or methacrylate with a molecular weight of less than 500 and at least one hydroxyl group in the molecular chain; the curing agent is a diisocyanate or a biepoxy compound

The main cross-linking agent may specifically be: hydroxypropyl acrylate, 4-hydroxybutyl acrylate, cyclotrimethylolpropane methylal acrylate, hydroxyethyl methacrylate, 2,3-dihydroxypropyl acrylate esters, etc.

In above-mentioned embodiment 11-31: described peroxide is: benzoyl peroxide, lauroyl peroxide, tert-butyl peroxybenzoate, diisopropyl peroxydicarbonate, cumene hydroperoxide, One or more mixtures of di-tert-butyl peroxide and tert-butyl hydroperoxide.

In above-mentioned embodiment 11-31: described diisocyanate curing agent is: toluene diisocyanate (abbreviated as TDI), isophorone diisocyanate (abbreviated as IPDI), diphenylmethane diisocyanate (abbreviated as MDI), hexamethylene One or more mixtures of lysine diisocyanate (referred to as HDI) and lysine diisocyanate (referred to as LDI);

The epoxy compound curing agent is: bisphenol A epoxy resin, diglycidyl tetrahydrophthalate, 1,4-butanediol diglycidyl ether, polyethylene glycol diepoxide One or more mixtures of alkyl methyl ether and 1,4-dioxane.

In above-mentioned embodiment 11-31: described plasticizer is dioctyl sebacate (abbreviated as DOS), dibutyl sebacate (abbreviated as DBS), triethylene glycol diisocaprylate (abbreviated as 3G8), hexamethylene One or more mixtures of dibutyl diacid (DBA for short) and diisobutyl adipate (DIBA for short).

In above-mentioned embodiment 11-31: described adhesive force regulator is: one or more mixtures in magnesium acetate, calcium acetate, zinc acetate, zinc oxalate, magnesium oxalate (preferred adhesive force regulator is Zinc acetate, magnesium acetate);

The antioxidants are: antioxidant 1010, antioxidant 1076, antioxidant 3114, antioxidant 300, one or a mixture of two or more (preferable antioxidants are antioxidant 1010, antioxidant 1076 );

The anti-ultraviolet agent is: one or more mixtures of UV-P, UV-326, UV-329, UV-234, GW-540, HPT (preferable anti-ultraviolet agents are UV-360, GW-540 ).

Example 32:

A preparation method of a high-strength, high-modulus PVB film is as follows: the component main material, the cross-linking agent and the functional auxiliary materials are mixed uniformly and melted and extruded through a twin-screw extruder; Obtain high-strength, high-modulus PVB film;

The twin-screw extruder is a JC-135 twin-screw extruder. The extrusion temperature is 40°C in the feeding section, 164°C in the compression section, 185°C in the homogenization section, and 200°C in the die section and the die section; The head pressure is 13MPa; the extrusion volume is 1350kg/h.

Others are the same as any of Embodiments 11-31, and are omitted.

In this processing and preparation process, the temperature of each section of the twin-screw extruder is preferably a gradient temperature, that is: from the feed port of the twin-screw extruder to the vacuum port, the temperature increases sequentially to prevent the temperature of the initial processing section from being too high. , The reaction rate is too fast, and the local cross-linking is excessive, which leads to the blockage of the extruder die and affects the processing performance of PVB.

In the above-described embodiment: among the percentage examples adopted, those not specified are the percentage examples of mass (mass) or the percentage examples known to those skilled in the art; Mass (mass) ratio; the mass parts may all be in grams or kilograms.

In the above embodiment: any point can be applied if the process parameters (temperature, time, pressure, etc.) in each step and the amount of each component are within the range.

The content of the present invention and the technical content not specifically described in the above embodiments are the same as the prior art, and the raw materials are all commercially available products.

The present invention is not limited to the above-mentioned embodiments, and the contents of the present invention can all be implemented and have the good effects.

Claims (10)

1. A PVB film with high strength and high modulus is characterized in that: the PVB film is prepared by uniformly mixing a main material, a cross-linking agent and a functional auxiliary material and extruding and casting the mixture by a double-screw extruder;

the main material comprises PVB resin powder and a plasticizer; the functional auxiliary materials comprise an adhesive force regulator, an antioxidant and an anti-ultraviolet agent;

the PVB resin powder, the plasticizer and the cross-linking agent are prepared from the following components in percentage by mass: 72-77% of PVB resin powder, 22-29% of plasticizer and 0.5-2% of cross-linking agent, and the sum of all the components is 100%.

2. The high strength, high modulus PVB film of claim 1, wherein: the addition amount of the bonding strength regulator is 0.08-0.3% of the mass of the main body material, the addition amount of the antioxidant is 0.1-0.8% of the mass of the main body material, and the addition amount of the anti-ultraviolet agent is 0.1-0.4% of the mass of the main body material.

3. The high strength, high modulus PVB film of claim 2, wherein: the cross-linking agent consists of a main cross-linking agent and a curing agent, wherein the mass ratio of the main cross-linking agent to the curing agent is 4.

4. The high strength, high modulus PVB film of claim 3 wherein: peroxide is added into the crosslinking agent; the addition amount of the peroxide is 0.4-1% of the mass of the cross-linking agent.

5. The high strength, high modulus PVB film of claim 3, wherein: the main cross-linking agent is acrylate or methacrylate with molecular weight less than 500 and at least one hydroxyl in the molecular chain; the curing agent is diisocyanate or a diepoxy compound.

6. The high strength, high modulus PVB film of claim 4, wherein: the peroxide is: benzoyl peroxide, lauroyl peroxide, tert-butyl peroxybenzoate, diisopropyl peroxydicarbonate, cumene hydroperoxide, di-tert-butyl peroxide and tert-butyl hydroperoxide.

7. The high strength, high modulus PVB film of claim 5 wherein: the diisocyanate is as follows: one or a mixture of more than two of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate and lysine diisocyanate;

the diepoxy compound is: bisphenol A epoxy resin, tetrahydrophthalic acid diglycidyl ester, 1, 4-butanediol diglycidyl ether, polyethylene glycol diglycidyl ether, and 1, 4-dioxane.

8. A high strength, high modulus PVB sheeting as in claims 1, 2,3, 4, 5, 6 or 7 wherein: the plasticizer is as follows: dioctyl sebacate, dibutyl sebacate, triethylene glycol diisocaprylate, dibutyl adipate and diisobutyl adipate.

9. The high strength, high modulus PVB film according to claim 8, wherein:

the adhesive force regulator comprises the following components: one or a mixture of more than two of magnesium acetate, calcium acetate, zinc oxalate and magnesium oxalate;

the antioxidant is as follows: one or more of antioxidant 1010, antioxidant 1076, antioxidant 3114 and antioxidant 300;

the uvioresistant agent is: one or more of UV-P, UV-326, UV-329, UV-234, GW-540 and HPT.

10. The high strength, high modulus PVB film of claim 9, wherein: the preparation method of the PVB film comprises the following steps: the components of the main material, the cross-linking agent and the functional auxiliary material are uniformly mixed and extruded by a double-screw extruder for casting.