CN101880965A - Production process of reinforced fiberglass modified adhesive - Google Patents

Abstract

The invention relates to a production process of a reinforced fiberglass modified adhesive, belonging to the production process of fiberglass adhesive manufacture. The production process of the reinforced fiberglass modified adhesive comprises the following steps of: firstly, adding emulsifiers A and B and water to a reaction kettle; adding a seed emulsion and monomers (I, II and III) to the reaction kettle so that an emulsion polymerization reaction is carried out among the emulsifiers A and B, the water, the seed emulsion and the monomers (I, II and III); adding an initiator, a main reducing agent and an auxiliary reducing agent to the reaction kettle to cause an initiation polymerization reaction after the emulsion polymerization reaction; controlling heating, stirring and feeding speeds; adding a modifier to the reaction kettle to generate an emulsified polymer after the initiation polymerization reaction is finished; then, sequentially adding a molecular weight regulator and a defoamer to the emulsified polymer for aging; keeping the electromagnetic for half an hour; keeping stirring; then, adding cooling water to lower the temperature to 40-45 DEG C; stopping stirring after the reaction is finished; and discharging, standing still and filling to obtain a finished product. The invention has the advantages of low cost, no toxicity or pollution, low system viscosity, easy heat transmission and easy temperature control by using water as a medium.

Description

The production technology of reinforced fiberglass modified adhesive

Technical field

The present invention relates to a kind of production technology of the production technology of making glass fibre glue, particularly a kind of reinforced fiberglass modified adhesive.

Background technology

Fiberglass gridding cloth has light weight, tensile strength height, high temperature resistant, corrosion resistant characteristics, and the quality of glass fiber reticular cloth is except outside the Pass the composition with glass fibre has, and also the performance with grid cloth shaping glue has quite directly relation.According to product application performance and customer requirement, screen cloth will have the characteristics of softness, adhesion and alkali corrosion resistance.Early stage fluoropolymer resin coating mostly is organic solvent type greatly, easily causes environmental pollution, and harmful.

Polyacrylate dispersion has good weatherability and film forming, and is good with the adhesive property of fabric, and do not contain organic solvent, nontoxic, pollution-free, cost is relatively low, has become the main material of glass fibre shaping glue at present.Acrylic acid ester emulsion coating by ordinary emulsion polymerization gained can not solve the contradiction between feel and the adhesive well, normally solved the adhesive problem, but the shortcoming that the feel that has grid cloth is hardened also exists intensity and the not high problem of alkaline-resisting retention rate in addition.

Summary of the invention

The objective of the invention is to provide a kind of: not only softness, good positioning effect, colourless, alkaline-resisting retention rate is high and but also the easy production technology of the reinforced fiberglass modified adhesive of uncoiling.

The object of the present invention is achieved like this: the concrete production technology of this reinforced fiberglass modified adhesive is as follows:

At first with emulsifying agent A, B and water, join in the reactor, in reactor, add seed emulsion and monomer I again, II, III, make emulsifying agent A, B and water and seed emulsion and monomer I, II, III carries out emulsion polymerization, in reactor, add initator and master behind the emulsion polymerization again, help reductant to carry out initiated polymerization, the control heating, stir, and charging rate, heating-up temperature is the 95-98 degree, speed of agitator is 42 rev/mins, charging rate is 4-6 hour, in reactor, add modifier after initiated polymerization is finished again and generate the emulsion polymerization body, and then in the emulsion polymerization body, add molecular weight regulator and defoamer in order and carry out slaking, keep temperature 85-87 degree, be incubated half an hour, keep stirring, logical then cooling water temperature is to the 40-45 degree, after finishing, reaction stops to stir, then blowing, static, can, finished product.

The preparation of described seed emulsion: the water that takes by weighing 30Kg, the lauryl sodium sulfate that adds OP-15 and the 0.45Kg of 1.35Kg, be heated to 60 degree, under the stirring, add methyl acrylate, the ethyl acrylate of 44.82Kg, the lauryl mercaptan of 0.05Kg, the different monooctyl ester of 0.5Kg, the acrylic acid of 0.925Kg and the acrylamide of 0.5Kg of 23.7Kg, use 20Kg, 7Kg water eluant container respectively, after adding, keep 40 degree, stir half an hour.

Described emulsifying agent A is that OP-15, emulsifying agent B are lauryl sodium sulfate; Described monomer I is that methyl methacrylate, monomer II are that ethyl methacrylate, monomer II I are different monooctyl ester; Described initator is that ammonium persulfate, main reductant are ferrous sulfate heptahydrate, to help reductant be rongalite; Described modifier is acrylamide; Described molecular weight regulator is that lauryl mercaptan, defoamer are S-20.

Beneficial effect: owing to adopted such scheme, the present invention adopts ionic comonomer, hydrophilic monomer, hydrophobic monomer, reaches a small amount of organic silicon monomer, water soluble starter, numerous emulsifiers, under churned mechanically effect, monomer is dispersed into emulsion and the polymerisation of carrying out in water; (1), selects suitable soft or hard monomer collocation, the glass transition temperature of control copolymer, and take into account the requirement of client to polymer film; (2), the stable emulsion of preparation, in conjunction with the characteristics on the glass production line, take into account the flowability and the mechanical stability of emulsion, so take anionic and nonionic surface active agent composite emulsifying system; (3), the stable of emulsion polymerisation carries out under the low temperature in order being implemented in, the average grain diameter of control emulsion is taked redox system about 0.2 μ m; (4), for improving the alkali resistance and the heat resistance of polymer film, adopt the method for big intramolecular crosslinking, add the functional monomer N hydroxymethyl acrylamide; (5), for improving the mechanical stability of emulsion, take on big molecule, to implant the way of polarity gene-S-O-, add a small amount of acrylic acid and participate in copolymerization; (6), take comparison reasonably " the pre-emulsification of monomer, seeded emulsion polymerization technology " on the polymerization technique; Make lab scale, pilot scale and small lot batch manufacture obtain the uniformity of better products quality; (7), in order to improve its TENSILE STRENGTH, in system, increased functional monomer, as organic silicon monomer etc.

Polymeric emulsifiers one end contains hydrophilic group, and an end is the hydrophobic group that contains two keys, and two keys can be linked polymer surfaces by polymerization, have avoided the migration of emulsifying agent.Thus, polymerisable emulsifier is by a large amount of synthetic and be used widely, and the polymeric articles function admirable that makes has good weatherability, hardness height, the light of filming, heat-resisting oiliness be good; Advantage such as the good and uvioresistant of ozone resistance is strong;

Not only softness, good positioning effect, colourless, alkaline-resisting retention rate is high and but also easy uncoiling, reached purpose of the present invention.

Advantage:

(1) with water be medium, inexpensive, nontoxic, pollution-free, system viscosity is low, readily conduct heat easy temperature control system.

(2), adopt water miscible redox initiation system, reaction can be carried out at low temperatures, rate of polymerization is fast, the molecular weight of product height.

(3), the viscosity of reaction later stage system is not high, is fit to produce the polymer of different viscosity.

(4), environment-friendly type is pollution-free, will make emulsion polymerisation have bright development prospect.

(5), emulsion polymer has good storage stability, storage is more than 2 years under the general room temperature.

(6), when having high solids content, also have good flowability and uniform emulsion particle diameter and distribute.

Description of drawings

Fig. 1 is a process chart of the present invention.

The specific embodiment

Embodiment 1: the concrete production technology of this reinforced fiberglass modified adhesive is as follows:

At first with emulsifying agent A, B and water, join in the reactor, in reactor, add seed emulsion and monomer I again, II, III, make emulsifying agent A, B and water and seed emulsion and monomer I, II, III carries out emulsion polymerization, in reactor, add initator and master behind the emulsion polymerization again, help reductant to carry out initiated polymerization, the control heating, stir, and charging rate, heating-up temperature is the 95-98 degree, speed of agitator is 42 rev/mins, charging rate is 4-6 hour, in reactor, add modifier after initiated polymerization is finished again and generate the emulsion polymerization body, and then in the emulsion polymerization body, add molecular weight regulator and defoamer in order and carry out slaking, keep temperature 85-87 degree, be incubated half an hour, keep stirring, logical then cooling water temperature is to the 40-45 degree, after finishing, reaction stops to stir, then blowing, static, can, finished product.

The preparation of described seed emulsion: the water that takes by weighing 30Kg, the lauryl sodium sulfate that adds OP-15 and the 0.45Kg of 1.35Kg, be heated to 60 degree, under the stirring, add methyl acrylate, the ethyl acrylate of 44.82Kg, the lauryl mercaptan of 0.05Kg, the different monooctyl ester of 0.5Kg, the acrylic acid of 0.925Kg and the acrylamide of 0.5Kg of 23.7Kg, use 20Kg, 7Kg water eluant container respectively, after adding, keep 40 degree, stir half an hour.

Described emulsifying agent A is that OP-15, emulsifying agent B are lauryl sodium sulfate; Described monomer I is that methyl methacrylate, monomer II are that ethyl methacrylate, monomer II I are different monooctyl ester; Described initator is that ammonium persulfate, main reductant are ferrous sulfate heptahydrate, to help reductant be rongalite; Described modifier is acrylamide; Described molecular weight regulator is that lauryl mercaptan, defoamer are S-20.

Emulsion polymer of the present invention has controllability and designability, by changing polymerization technique, can give emulsion polymer with specified molecular weight and distribution thereof, specific emulsion particle diameter and specific emulsion particle structural form, by introducing different functional groups, can give the performance different as latex, thereby the colloid of preparation different performance, and, polymer emulsion has good compatibility usually, carry out different polymer emulsions compound, or polymer emulsion and other additive are carried out composite, it is different to prepare performance, satisfy the emulsion agent of the different demands of client.

The present invention, the carbochain of acrylate backbone and ester bond are for polymer provides multiple premium properties, as alkali resistance, chemical stability, weatherability, durability, resistance to water, hardness, pliability, dissolubility and compatibility etc.

Claims (1)

1. the production technology of a reinforced fiberglass modified adhesive is characterized in that: the concrete production technology of this reinforced fiberglass modified adhesive is as follows:

At first with emulsifying agent A, B and water, join in the reactor, in reactor, add seed emulsion and monomer I again, II, III, make emulsifying agent A, B and water and seed emulsion and monomer I, II, III carries out emulsion polymerization, in reactor, add initator and master behind the emulsion polymerization again, help reductant to carry out initiated polymerization, the control heating, stir, and charging rate, heating-up temperature is the 95-98 degree, speed of agitator is 42 rev/mins, charging rate is 4-6 hour, in reactor, add modifier after initiated polymerization is finished again and generate the emulsion polymerization body, and then in the emulsion polymerization body, add molecular weight regulator and defoamer in order and carry out slaking, keep temperature 85-87 degree, be incubated half an hour, keep stirring, logical then cooling water temperature is to the 40-45 degree, after finishing, reaction stops to stir, then blowing, static, can, finished product;

The preparation of described seed emulsion: the water that takes by weighing 30Kg, the lauryl sodium sulfate that adds OP-15 and the 0.45Kg of 1.35Kg, be heated to 60 degree, under the stirring, add methyl acrylate, the ethyl acrylate of 44.82Kg, the lauryl mercaptan of 0.05Kg, the different monooctyl ester of 0.5Kg, the acrylic acid of 0.925Kg and the acrylamide of 0.5Kg of 23.7Kg, use 20Kg, 7Kg water eluant container respectively, after adding, keep 40 degree, stir half an hour;

Described emulsifying agent A is that OP-15, emulsifying agent B are lauryl sodium sulfate; Described monomer I is that methyl methacrylate, monomer II are that ethyl methacrylate, monomer II I are different monooctyl ester; Described initator is that ammonium persulfate, main reductant are ferrous sulfate heptahydrate, to help reductant be rongalite; Described modifier is acrylamide; Described molecular weight regulator is that lauryl mercaptan, defoamer are S-20.

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