JPS62156114A - Resin composition for laminated sheet - Google Patents

Abstract

PURPOSE:To obtain the titled composition giving a cured material having improved properties and suitable for producing an unsaturated polyester resin laminated sheet, etc., by mixing a base resin with a pentaerythritol poly(meth) acrylate having a specific amount of (meth)acryloyl groups in a molecule. CONSTITUTION:The objective composition is produced by compounding (A) a diallyl phthalate resin, an unsaturated polyester resin or their mixture with (B) a pentaerythritol poly(meth)acrylate having >=3 (meth)acryloyl groups in a molecule (e.g. pentaerythritol monohydroxytriacrylate). The amount of the component B is preferably 10-50pts.(wt). per 100pts. of the component A.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a resin composition for a thermosetting resin laminate having improved properties of a cured product.

(Prior art) Thermosetting resin laminates, especially diallyl phthalate resin laminates, have excellent moldability and bost-form processability, and also have physical and chemical properties that are superior to older laminates. Among them, decorative boards are popular as materials with a calm texture.

However, diallyl phthalate resin laminates are inferior to melamine resin laminates in terms of hardness and heat resistance such as cigarette resistance, and are particularly difficult to use for top plates such as desks and counters. Similar problems also occurred in unsaturated polyester resin laminates.

(Objective of the Invention) An object of the present invention is to provide a resin composition suitable for use in a diallyl phthalate resin or unsaturated polynisder resin laminate, which is free from the above-mentioned drawbacks and has improved surface characteristics.

(Structure of the Invention) The present invention provides polyacrylate or polymethacrylate of pentaerythritol having three or more acryloyl groups or methacryloyl groups in the molecule in diallylphthalate resin, unsaturated polyester resin, or mixed resin thereof. This is a resin composition for a laminate with improved cured product properties, which is a mixture of these mixtures.

In the present invention, the diallyl phthalate resin refers to a diallyl phthalate prepolymer such as a known ortho, iso or tere-diallyl phthalate prepolymer alone, a mixture thereof, or a modified prepolymer thereof. Further, the unsaturated polyester resin used is usually one that is liquid or solid at room temperature when heated to λu.

When unsaturated polyester resin is used alone, solid 5
is preferable in terms of workability. When used as a mixed resin, the mixing ratio of the two may be arbitrary; however, in the case of making a laminate that takes advantage of the characteristics of the diallyl phthalate resin, 20% by weight of the diallyl phthalate resin is required even if it is not contained in the resin.

The pentaerythritol polyacrylate or polymethacrylate (hereinafter both collectively referred to as poly(meth)acrylate) used in the present invention has an acryloyl group or methacryloyl group (hereinafter both collectively referred to as (meth)) in the molecule. Poly(meth)acrylates having three or more acryloyl groups (referred to as acryloyl groups) may be used alone or as a mixture.

Poly or mono(meth)acrylate resin with (meth)acryloyl group or less than 2 cycles, diallyl phthalate resin or (
The compatibility with highly unsaturated polyester resins is insufficient, and the desired effect cannot be obtained.

The poly(meth)acrylates used in the present invention include pentaerythritol monohydroxytriacrylate, pentaerythritol tetraacrylate (~, pentaerythritol monohydroxytrimethacrylate-1-, pentaerythritol tetramethacrylate) These four types are used alone or as a mixture.The blending side is 5 to 70 parts by weight, preferably 10 parts by weight, based on 100 parts of diallyl phthalate resin, unsaturated polyester resin, or a mixture of these resins. A suitable range is from 50 parts by weight.If it is less than 5 parts by weight, the effect of improving the surface properties which is the objective of the present invention cannot be sufficiently obtained;
If it exceeds a single base, the cured product will become too hard and brittle, and the resin will become sticky during processing, causing problems in workability.

A commonly used curing agent for diallyl phthalate resin or unsaturated polyester resin is added to the composition of the present invention. In addition, if necessary, other types of reactive additives and additives commonly used in the technical field, such as internal mold release agents, fillers, etc.
M fuel double polymerization inhibitor.

Pigments etc. can be added.

In order to manufacture a laminate using the composition of the present invention, the composition is dissolved in a suitable solvent (for example, a proprietary solvent such as acetone, toluene, methyl ethyl ketone, etc.) to prepare a slag solution, and this is used as a base material. This is achieved by impregnating an appropriate amount depending on the material, drying it, and then thermoforming the core using plywood, particle board, or paper impregnated with ordinary resin. Further, after the base material impregnated with the composition of the present invention is heated and cured, it can be laminated onto a metal plate such as an aluminum plate using a bonding agent.

The above-mentioned base material for impregnation includes printing paper, woven fabric, 2 pieces of non-woven fabric 7
There are 1 veneers, etc. The heating molding conditions may be those of conventionally used allyl phthalate resin or unsaturated polyester resin, and are usually 100 to 160°C and 11 to 60 kg/cm.
2.1 to 60 minutes is sufficient.

(Effects of the Invention) A laminate using a composition containing pentaerythritol poly(meth)acrylate-1 of the present invention has
Surface properties such as scratch hardness and scissor/jet resistance are dramatically improved compared to laminates using conventional diallylphtathy resin or unsaturated polyester resin that does not contain acrylates, Heaven was considered difficult,
It is now available for commercial use.

(Example) Examples 1 to 4 Comparative Examples 1 to 3 The resin composition shown in Table 1 was printed with a basis weight of 100
! ; Impregnated with printing paper of I/end, resin adhesion amount after drying: 13
An impregnated paper of 0 g/TIt was obtained.

Separately, kraft paper impregnated with ordinary diallyl phthalate resin (total basis weight 240 (+/7 rL, inner resin included) 8♀10
0 (1/rd) Prepare 2 sheets, layer the above impregnated paper on top of the 2 sheets, and use a glossy mirror plate to coat 130
'C was pressed at 130 kg/cm2, and 20 minutes after insertion, it was cooled with water to obtain a laminate.

The surface scratch hardness and crush resistance of the above laminate were measured and the results are shown in Table 1.

Surface scratch hardness: JAS standard A test, 10 points average 11 scratches, depth μ).

Observation of the surface condition of a shicalet-resistant two-light tobacco after it was left for 2 minutes and then wiped with methanol.

Evaluation fiIIi (average of 2 points) ◯ Almost no discoloration x Coloration due to burning In addition, in Comparative Example 2, the resin composition did not mix and could not be molded. Comparative Example 3 is an example in which a polyacrylate of a different type from the poly(meth)acrylate used in the present invention was used.

Notes (1) to (4) in Table (1) are as follows.

(1> Methyl ethylke weight% 0 weight loss% solution viscosity (30'
C) 96.5Cp, prepolymer with an iodine value of 56.7 (
2) Commercially available polyester resin with an acid value of 34.5, consisting of 1 mole of maleic acid, 1 mole of phthalate and 2 moles of propylene glycol (3) rDR-2os4 Osaka Soda Co., Ltd. trade name (4) "Carplex J Shiono n"A' Company J Trading Company Name Product Name Applicant Hansoda Co., Ltd.

Claims (1)

[Claims] A polyacrylate or polymethacrylate of pentaerythritol having three or more acryloyl groups or methacryloyl groups in the molecule, or a mixture thereof, is mixed with a diallyl phthalate resin, an unsaturated polyester resin, or a mixed resin thereof. A resin composition for laminates with improved cured product properties.