KR970004666B1 - Plastic composition for the use of frame filler - Google Patents

Abstract

This invention provides unsaturated polyester resin composition for filling to plastic window aggregate. Resin composition for filling plastic window aggregate in this invention comprises 40 to 50 parts by weight of unsaturated polyester resin, 2 to 5 parts by weight of cellulose acetate butylate, 5 to 10 parts by weight of poly acetic acid vinyl, 30 to 60 parts by weight of inorganic filler, 0.2 to 1.0 parts by weight of promoter of metallic soap group such as manganese naphthenic acid, 0.3 to 1.0 parts by weight of hardener and 0.2 to 2.0 parts by weight of oxide of general formula(I) where R represents H or CH3.

Description

Filling resin composition for plastic window frame aggregate

The present invention relates to an unsaturated polyester resin composition for filling into a plastic window frame, which is cured by adding an acid compound and a metal soap accelerator to a resin mixture composed of an unsaturated polyester resin, a shrinkage reducing agent, an inorganic filler, a crosslinking agent, and a curing agent. The present invention relates to a composition of an inner filling mixture for window frames, which suppresses heat generation during aging and at the same time has excellent mechanical strength and increases adhesion between plastic materials and resin mixtures.

In the conventional case, in the resin molding, an inorganic resin and a curing agent are mixed with an acrylic resin to fill the inside of a plastic window and a glass fiber reinforcing rod is inserted in order to improve the bending strength. As an example, methyl acrylate has been polymerized in a hollow portion (Application Publication No. 82-2227).

However, in the above method, the plastic material and the adhesive strength are excellent, but when the acrylic resin, which is a liquid resin, and the curing agent are cured, a high heat above the softening point of the plastic material is generated, and if the calorific value is not artificially forced to cool the product surface, Since protrusions and deformations occurred in the longitudinal direction, a cooling mold having the same structure and length as the profile outer shape was required. Therefore, when molding with such a device, not only the productivity is greatly reduced, but also the thermal deformation problem of the final product can not be solved when the cooling efficiency is lowered. Accordingly, the present inventors add the metal soap accelerator and the acid compound to the filling resin to suppress the heating of high heat generated when the filling resin is cured, as well as the inherent physical properties of the cured resin at low heat generation. To provide a filling resin composition excellent in mechanical strength that can be maintained as it is.

The present invention is described in detail as follows.

The blending ratio of the resin composition of the present invention is 40 to 55 parts by weight of unsaturated polyester resin, 5 to 10 parts by weight of shrinkage reducing agent, 2 to 5 parts by weight of adhesive, 30 to 60 parts by weight of inorganic filler, and 0.3 to 10 parts by weight of filler resin. By weight and 0.2-2.0 parts by weight of the acid compound shown in Table 1 and 0.2-1.0 parts by weight of metal soaps accelerator is characterized in that it is mixed.

In addition, the filling resin in the present invention can be easily prepared by mixing an unsaturated polyester resin, a shrinkage reducing agent, a metal soap accelerator, and an acid compound at a high speed mixer 500-1000 rpm for about 4-5 minutes at room temperature.

The present invention is described in more detail as follows.

The acid compound used for strength reinforcement has a structure as shown in the following formula (I), in which monomers of n = 0, dimers of n = 1, and condensates of n = 2-10 are mixed alone or in combination of two or more. As a condensate of a dimer or more, generally known acrylic acid or methacrylic acid can be used.

................. (Ⅰ)

Provided that R = hydrogen atom (H-) or methyl group (CH _3- ) and repeating unit n = 0-10.

The acid compound used is preferably 0.2-2.0 parts by weight, more preferably 0.3-1.0 parts by weight of the total amount of the mold resin, when less than 0.3 parts by weight can not sufficiently exhibit the binding force between the resin and the inorganic filler, 1.0 Part by weight or more is good in viscosity reduction effect, but absorbs a lot of moisture due to the increase in acid content, resulting in dysfunction in improving strength.

Unsaturated alkyd in unsaturated polyester resin is maleic anhydride as unsaturated polybasic acid, phthalic anhydride as saturated polybasic acid, and propylene glycol as glycol can be easily obtained by polycondensation reaction. It is preferable to melt | dissolve this in the vinyl monomer, but it is preferable that the polymer content contains 55-65 weight% and the viscosity is 200-500 centipoise (25 degreeC) acid value 30-40. If the unsaturated polyester resin is less than 40 parts by weight of the filler resin, the viscosity of the filling mixture is rapidly increased, making it difficult to fill the hollow inside the window frame, and when using more than 55 parts by weight, shrinkage of the cured product occurs due to the relative decrease of the filler content. As a result, the interface between the plastic window frame structure and the delamination may cause deformation and final properties in the longitudinal direction.

As an adhesive for improving the bonding strength and bonding properties of plastic materials and cellulose, cellulose acetate butyrate is dissolved in vinyl monomer to have a polymer content of 10-40% by weight and a viscosity of 1-150 poise (25 ° C). Preference is given to using 2-5 parts by weight of the resin.

As vinyl monomers corresponding to 30-40% of unsaturated polyester resins polymerize and exhibit volume shrinkage of 10% or more with high heat, shrinkage reducing agents for preventing this are polyvinyl acetate, polystyrene, polyethylene, polymetha It is preferable to dissolve thermoplastic resins such as acrylate, polyvinyl chloride, and polyurethane in a vinyl monomer to produce a polymer content of 30-40%, and to use the mixture in 5-10 parts by weight of the total filling resin, and mix one or two or more kinds. Can be used.

Examples of the inorganic fillers include calcium carbonate, aluminum hydroxide, glass beads, talc, and the like. 30-60 parts by weight may be used alone or in combination of two or more. More preferably, the average particle size is 50-80 microns and the specific gravity is 0.3-. It is preferable to use a porous foamed lightweight filler mainly composed of silicate of 0.7, and when it is used at less than 30 parts by weight, it is easy to fill with low viscosity, but the amount of resin shrinks due to high heat because of relatively large amount of resin compared to the amount of filler. In addition, when using 60 parts by weight or more, the viscosity rises so that it is not only difficult to mix and fill, but may also cause a drop in physical properties.

As the exothermic temperature lowering agent, it is preferable to dissolve the metal soap promoter in 3-8% by weight with plasticizers such as DOPY, DBP, DMP, etc., and mix 0.2-1.0 parts by weight. Deterioration may cause deformation of the final product due to exotherm, and 1.0 parts by weight or more may inhibit the reaction, causing reaction delay and physical property deterioration. Examples of the metal soap promoter include manganese naphthenate, copper vanadate naphthenate, calcium naphthenate, and zinc naphthenate, and can be used alone or in combination of two or more thereof.

As a curing agent, it is preferable to use a peroxide compound such as methyl ethyl ketone peroxide, benzoyl peroxide, butyl peroxy neorecanoate, etc., in the resin at 0.3-1.0 parts by weight, and when using less than 0.3 parts by weight, the reaction delay phenomenon and complete curing It does not reach to affect physical properties, and when used more than 1.0 parts by weight, a rapid reaction, the exothermic temperature is high, the filling shrinkage and cracking phenomenon occurs after curing.

In this invention, a phase separation inhibitor, a polymerization inhibitor, a hardening accelerator, a defoaming agent, etc. can be used.

When manufacturing the resin composition for a plastic window frame in the same way as described above, not only suppresses the heat generated during the curing reaction as shown in Table 1, but also generates heat at a temperature lower than the softening point (75 ° C.) of the plastic window frame material. Since the mold for forced cooling is unnecessary, the apparatus manufacturing cost is low, and the productivity for the window frame aggregate can be obtained.

Example

45.8-47.3 parts by weight of a filling resin prepared by dissolving unsaturated alkyd, saturated dibasic acid, unsaturated dibasic acid and glycol prepared by polycondensation in a vinyl monomer, 5.8 parts by weight of vinyl acetate, and 4.7 parts by weight of cellulose acetate butyrate , 0.3-1.2 parts by weight of acid compound, 0.3-0.9 parts by weight of metal soap accelerator, 0.6 parts by weight of methyl ethyl ketone peroxide, and mixed for 1-2 minutes, and then 30-60 parts by weight of porous foamed light filler. After mixing, the viscosity was measured, injected into a plate mold, and the first curing was performed at room temperature, the second curing was performed at 60 ° C for 6 hours, and then left at room temperature for 1 day to prepare a specimen after demolding, and the specific component ratio (weight ratio) And physical properties are shown in Table 1.

Comparative example

Similar to the example, but prepared using the methyl methacrylate syrup and the crosslinking agent instead of the unsaturated polyester resin using trimethylol propane trimethacrylate, or without the addition of cellulose acetate butyrate and metal soap accelerator To indicate the physical properties in Table 1.

Claims (4)

40-55 parts by weight of unsaturated polyester resin, 2-5 parts by weight of cellulose acetate butyrate, 5-10 parts by weight of polyvinyl acetate, 30-60 parts by weight of inorganic filler, 0.2-1.0 parts by weight of metal soap accelerator, and 0.3-% of curing agent Filling resin composition for a plastic window frame, characterized in that consisting of 1.0 parts by weight, 0.2-2.0 parts by weight of the acid compound represented by the following formula (I). ................. (Ⅰ) R = hydrogen atom (H) or methyl group (CH ₃ ) n = 0-10 The method of claim 1, wherein the metal soap-type accelerator is used in the manganese naphthenate, vanadate octoate, naphthenic acid, calcium naphthenate, zinc naphthenate, or a mixture of two or more kinds of filling resin composition for plastic window frame . The plastic window frame filling resin composition according to claim 1, wherein the acid compound is used alone or as a mixture of two or more kinds of monomers of n = 0, dimers of n = 1, and polymers of n = 2-10. The method of claim 1, wherein the cellulose acetate butyrate is a plastic window frame filled resin composition, characterized in that the polymer content is 10-40% by weight, the viscosity is 1-150 poise (25 ℃).