CN102604061A - Modified saturated resin for plastic coating and preparation method thereof - Google Patents

Abstract

The invention relates to the technical field of high polymer material preparation, in particular to modified saturated resin for a plastic coating and a preparation method thereof. The modified saturated resin is a polymer formed by performing esterification reaction and carrying out condensation polymerization on organic polyatomic alcohol, saturated polybasic acid or anhydride under the condition of the existence of a catalyst and can be widely applied to paint with elastic hand feelings or two-component polyurethane top-coat of an ABS substrate, a PP (Propene Polymer) substrate, a PMA (Propylene Glycol Monomethyl Acetate) substrate, a PVC (Poly Vinyl Chloride) substrate and the like. The resin and a composition thereof, which are disclosed by the invention, can be widely applied to plastic products with high requirements on the appearance and the hand feeling, such as a handle of a hair dryer, a MP3 (Moving Picture Experts Group Audio Layer-3) housing, a mouse, a mobile phone housing, a telescope, and an umbrella handle.

Description

Plastic coating is with modification saturated resin and preparation method thereof

Technical field

The present invention relates to field of polymer material preparing technology, especially a kind of plastic coating is with modification saturated resin and preparation method thereof.

Background technology

Plastic coating is the coating that is coated on the plastic material; In the last few years; Plastic paint has been widely used in fields such as mobile phone, televisor, computer, automobile, motorcycle accessories; Like automobile external-use parts (collision bumper, mirror cover, car side outer cover etc.) and interior with parts (facia board, door face board, air cell covering, turn to cover etc.), plastic paint also is widely used in motion and leisure utensil, cosmetic package in addition, and toy etc.

Standard of living raising along with the people; Appearance requirement to plastic cement products is increasingly high, and like aluminium powder effect, crackle effect, elastic handfeel effect or the like, particularly some are through the position of hand touch commonly used; Like Blowing drum handle, MP3 shell, mouse, phone housing, visual telescope, umbrella handle or the like; Require spraying to have enough flexible elastic coating obtaining comfortable soft smooth sensation, and no longer be icy coarse stiff sensation, elastic handfeel paint arises at the historic moment for this reason.

In China, the plastic paint high-end market is by the control of external major company, and the market value difference of plastic paint is very big; The quality of import brand and home brands and price differ bigger; And the patent of domestic report and document also mainly concentrate on the preparation and the application of elastomeric paint coating, designing and developing on the data of resin also do not appeared in the newspapers, and the sticking power of currently available products and chemical resistant properties are more limited; Therefore the resin with excellent feel and sticking power effect is used in exploitation to elastomeric paint; The breaks through foreign technical monopoly, the outward appearance of beautifying the plastic cement product improves its added value of product and profit; Remedy material property defective and enhancing or enlarge material limit, it is significant enhancing one's market competitiveness.

Summary of the invention

Not enough in order to tackle existing plastic coating resin exploitation aspect, the invention provides a kind of plastic coating with modification saturated resin and preparation method thereof.

The technical solution adopted for the present invention to solve the technical problems is: a kind of plastic coating is used the modification saturated resin, and it is the polymkeric substance that in the presence of catalyzer, is formed through the esterification polycondensation by organic polyhydric alcohol, saturated polybasic acid or acid anhydrides; Described organic polyhydric alcohol comprises, terepthaloyl moietie, Diethylene Glycol, Ucar 35, dipropylene glycol, methyl propanediol, butyleneglycol, NSC 6366, tetramethylolmethane, TriMethylolPropane(TMP), one or more of pinakon and verivate thereof; Described saturated polybasic acid or its acid anhydrides comprise Tetra hydro Phthalic anhydride, m-phthalic acid, terephthalic acid, trimellitic acid, Pyromellitic Acid, hexanodioic acid, sebacic acid, oxalic acid, one or more of dimeracid and verivate thereof.The present invention can be widely used in the feel elastomeric paint or the dual-component polyurethane finish paint of base materials such as ABS, PP, PMA, PVC.

According to another embodiment of the invention, comprise that further described catalyzer comprises acids, transition metal, tin compound and amine.

A kind of plastic coating of the present invention may further comprise the steps with the preparation method of modification saturated resin:

Organic polyhydric alcohol, saturated polybasic acid or acid anhydrides and catalyst by proportion input are had the device that heats and stir; Feed nitrogen protection, stir and be warming up to water outlet, 95～105 ℃ of temperature and 180～210 ℃ of temperature of reaction are heated up in a steamer in control; To acid number 1-5 mg KOH/g; Be cooled to behind the hydroxyl value 40-120mg KOH/g below 60 ℃, pack shady and cool airtight preservation with zinc-plated bucket.

The invention has the beneficial effects as follows advantage of the present invention: (1) is made up of more general raw material, and preparation cost is low, and cost performance is high; (2) utilize the selection of pure acid starting material, like hexanodioic acid, sebacic acid, 1,4-butyleneglycol, Diethylene Glycol etc. obtain having good flexible backbone structure; (3) introduce a small amount of polyfunctionality compound, the control molecular weight and the degree of branching are at optimum proportion, and guaranteeing increases the paint film wear resistance on the elastic basis of feel; (4) through to the combined sorting of feel auxiliary agent, flatting silica, solvent, obtain having excellent scratch resistance, the coating of alcohol resistance, also have higher ornamental, the paint film light, plentiful and fast dried of make.Resin according to the invention and compsn thereof are in the plasthetics that can be widely used in outward appearance and feel are had relatively high expectations, like Blowing drum handle, MP3 shell, mouse, phone housing, visual telescope, umbrella handle etc.

Embodiment

The inventor is through improving synthesis technique and prescription; Obtain a kind of plastic coating with high-grade modification saturated resin and preparation method thereof with excellent handle and sticking power; Final resin has good flexible backbone structure, introduces a small amount of polyfunctionality compound, and the control molecular weight and the degree of branching are at optimum proportion; Guaranteeing increases the paint film wear resistance on the elastic basis of feel.

Below in conjunction with specific examples the present invention is done further explain, but the invention is not restricted to specific embodiment.

The synthetic embodiment of resin:

Prepare a kind of plastic coating with high-grade modification saturated resin by following composition of raw materials and preparation method with excellent handle and sticking power effect.

Prescription is:

Title	Weight part
		Ucar 35	11
Diethylene Glycol	38
		Terepthaloyl moietie	11
TriMethylolPropane(TMP)	3
		Tetra hydro Phthalic anhydride	1
Hexanodioic acid	85
		Normal-butyl tin	0.04

Preparing method's step is following:

The device that organic polyhydric alcohol, saturated polybasic acid or acid anhydrides and catalyst by proportion input have heating and stir; Feed nitrogen protection, stir and be warming up to water outlet, 95～105 ℃ of temperature and 180～210 ℃ of temperature of reaction are heated up in a steamer in control; To acid number 1-5 mg KOH/g; Be cooled to behind the hydroxyl value 40-120mg KOH/g below 60 ℃, pack shady and cool airtight preservation with zinc-plated bucket.

The final physical property data of product are following:

Project	Synthetic embodiment
		Outward appearance	Light yellow transparent liquid
Admittedly contain (107 ℃ of * 2h)	99.2
		Admittedly contain (150 ℃ of * 1h)	98.3
Acid number (mg KOH/g)	4.7
		Bubble pipe viscosity (25 ℃)	Z2-Z3
Look number	20#
		Hydroxyl value (mg KOH/g)	97

Plastic cement elastomeric paint application implementation example:

The A component:

Synthetic routine resin: 30g; Mute powder OK-520 (Degussa): 6g; Siccative T-12 (U.S.'s air): 0.3g; Feel auxiliary agent: 2g; Flow agent: 1g; Solvent (30 parts of YLENE, 30 parts of butyl esters, 40 parts of diacetone alcohols): 60.7g.

The B component:

N-3390：11.32g。

The C component:

Solvent (toluene 50%, butyl ester 50%) 53.64g.

According to the ratio of A:B:C=10:1:3 preparation paint, sprayed workpiece after, air-dry 15-20 minute, 70 ℃ then * 30 minutes or air dry 24H.

Plastic cement elastomeric paint paint film character:

Project	Smooth property	Scratch resistance	Recoatability	The paint cost	Room temperature air dry whether
						Effect	Good	Good	Can	Low	Can

Claims (3)

1. a plastic coating is used the modification saturated resin, it is characterized in that, it is the polymkeric substance that in the presence of catalyzer, is formed through the esterification polycondensation by organic polyhydric alcohol, saturated polybasic acid or acid anhydrides; Described organic polyhydric alcohol comprises, terepthaloyl moietie, Diethylene Glycol, Ucar 35, dipropylene glycol, methyl propanediol, butyleneglycol, NSC 6366, tetramethylolmethane, TriMethylolPropane(TMP), one or more of pinakon and verivate thereof; Described saturated polybasic acid or its acid anhydrides comprise Tetra hydro Phthalic anhydride, m-phthalic acid, terephthalic acid, trimellitic acid, Pyromellitic Acid, hexanodioic acid, sebacic acid, oxalic acid, one or more of dimeracid and verivate thereof.

2. plastic coating according to claim 1 is used the modification saturated resin, it is characterized in that, described catalyzer comprises acids, transition metal, tin compound and amine.

3. the described plastic coating of claim 1 is characterized in that with the preparation method of modification saturated resin this method may further comprise the steps:

Organic polyhydric alcohol, saturated polybasic acid or acid anhydrides and catalyst by proportion input are had the device that heats and stir; Feed nitrogen protection, stir and be warming up to water outlet, 95～105 ℃ of temperature and 180～210 ℃ of temperature of reaction are heated up in a steamer in control; To acid number 1-5 mg KOH/g; Be cooled to behind the hydroxyl value 40-120mg KOH/g below 60 ℃, pack shady and cool airtight preservation with zinc-plated bucket.