JPS58187440A - Self-weldable flame-retardant compound - Google Patents

Abstract

PURPOSE:A self-weldable flame retardant compound, prepared by incorporating a rubber consisting essentially of a polyisobutylene, etc. with an organic halogen compound, antimony oxide and aluminum hydroxide, etc., and having improved flame retardancy, adhesion and heat resistance. CONSTITUTION:A self-weldable flame retardant compound prepared by incorporating 100pts.wt. rubber consisting essentially of polyisobutylene or butyl rubber, with 100pts.wt. or more halogen compound, e.g. chlorinated paraffin, having >=30% halogen content, 10pts.wt. or more antimony oxide, 100pts.wt. or more aluminum hydroxide, 50pts.wt. or more softening agent, e.g. tricresyl phosphate, and if necessary a stabilizer, e.g. tribasic lead sulfate, a filler, e.g. clay, etc., and molding the resultant mixture into a sheet, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-bonding flame retardant compound mainly composed of polyisobutylene and butyl rubber.

There are methods for joining exhaust ducts in kitchens, bathrooms, toilets, etc., such as the insertion method, the joining method with screws, and the method using caulking compounds such as silicone, but these methods are difficult to standardize, and the work is time-consuming and costly. There are problems such as water leakage and smoke leakage.

The present study is a synthetic rubber flame retardant compound with self-fusing properties that passes the flame retardant regulations according to the second class flame retardant evaluation according to the JI8A 1322A method. It is easy to turn, the work can be easily reduced to $4, and it has the following features.

(1) The airtightness is good, and there is no water leakage from Yushima or leakage from the spear.

(2) Excellent flame retardancy.

(5+: Excellent adhesion and no decrease in adhesion even after long-term storage.

(4) Excellent heat resistance and does not slump even at high temperatures.

(5) Adheres well to gold. It does not cause burn-in even if used for a period of time.

(6) Excellent elasticity and earthquake resistance.

(7) Excellent oil resistance, corrosion resistance, and piezoelectric corrosion resistance.

(8) Dry curing ρ as no solvent is used; unnecessary and bulky 7
Does not cause shrinkage.

As a compound with flammability of 161
81, which is a mixture of chlorinated polyethylene with a high average molecular weight and chlorinated polyethylene with a chlorination amount of 60 or less, and a mixture of chlorinated polyethylene with a low average molecular weight, and polyisobutylene or chlorinated polyimbutylene with a high molecular weight. Although it is a mixture in which a resin adhesive and a metal oxide are added, the flame retardance is not sufficient and the adhesiveness tends to decrease over a long period of time.

The present invention has sufficient flammability and does not deteriorate in adhesion even after long-term storage.Since the present invention is made mainly of polyisobutylene and butyl rubber that have no or very few double bonds, this compound It has excellent heat resistance and aging resistance, and adheres well to gold wire, but it does not cause seizure even when used at high temperatures for a long period of time. This compound has excellent self-fusing properties and processability.) Polyisobutylene having a molecular weight of 50,000 or more is preferably used. Moreover, it is preferable that the molecular weight of butyl rubber is 250,000 or more.

In the present invention, it is also possible to use natural or synthetic rubbers that can be mixed with the above-mentioned rubber, within a range that does not lead to so@. Use halogen compounds such as 1 or these are chlorinated para-7(n), tmj-K ethylene, chlorosulfonated polyethylene, etc. and these halogen compounds containing %J#i halokene are 5( It is preferably 1 or more, and the blending amount is 100 layers of synthetic rubber (hereinafter referred to as T*Ks).
The amount is 100 parts or more, preferably 150 parts or more.

In the present invention, antimony oxide is used together with a halogen compound. The amount of antimony oxide blended is 1 olp or more, preferably 15 parts or more, per 100 parts of synthetic rubber.

The compound of the present invention is characterized by the use of a large amount of aluminum hydroxide, and the use of a large amount of aluminum hydroxide generates a large amount of water during combustion, which prevents the compound from spreading.

The amount of aluminum hydroxide blended is 100 parts or more, preferably 200 parts or more per 100 g of synthetic rubber,
More preferably, the amount is 500 parts or more.

The compounds of the present invention use large amounts of softeners, such as tricresyl phosphate, chlorinated paraffins, epoxies, etc., to provide good processability and self-fusing properties. The amount of these softeners in formulation 1 is 50 parts or more, preferably 1100 parts or more, and more preferably 150 parts or more, per 100 parts of synthetic rubber. Among these softeners, chlorinated paraffin is an important compounding agent because it functions both as a halogen compound and as a softener.

Furthermore, when tricresyl phosphate is used, the flame retardance is improved to the next level.

In order to improve the heat resistance and aging resistance of the flour pound of the present invention, stabilizers may be used, and these are tribasic lead sulfate and magnesium oxide.

In the present invention, it is possible to use fillers such as calcium carbonate and clay, carbon black, and other colorants that are commonly used in rubber.

This compound may be used after being vulcanized or semi-vulcanized by adding a vulcanizing agent for synthetic rubber.

An organic or inorganic foaming agent may be added to foam during combustion to prevent the spread of fire.

The compound is mixed using a roll, banbury, kneader, etc., formed into a sheet using an extruder or calender, placed on release paper, and wound up. It may also be used in the form of strings or other shapes.

The compound of the present invention can be integrated by simply wrapping a tape around it, prevents leakage of exhaust residue, and has a number of flame-retardant properties, making it useful for elevated structures.

Next, some examples of the present invention will be described.

Example 1 The compound shown in Sui 1 was mixed with a roll, formed into a sheet with a thickness of 1H using a calender, and rolled up on release paper. The physical properties of this tape were as shown in XI 2&, and the properties of each axis were excellent.

#1 1 Table: Butyl rubber (molecular weight: 550,000) 100 parts Chlorinated polyethylene (chlorine-containing lid: 4 oz.) 80#
￥M Lignified paraffin (chlorine content 1t4(n) 10
0# Sanburika antimony 17
1 Aluminum hydroxide 500#
tricresyl phosphate) 100
#tribasic mM lead 101
Ephoxy resin (7 decal resin BP4100)!
SO#magnesium oxide
151 clay
501 pigment
21 stitches
8041 Table 2 Tensile strength 4j/cII) 1.50
JIS K 65o1 elongation (chi)
400 Body resistivity (Ω-[) &5X10” JIS
K 691 Adhesive force (kf/m) 0.35 Heating load deformation rate (chi) 60℃ 50 JIS
K 6725100℃ 65 Penetration IL25°O45JIS K 220740℃ 5
6 60°071 Chemical resistance Good hydrochloric acid 10 each - solution sulfuric acid l
Caustic soda soaked for 30 days at room temperature I Ammonia l S oil l Heat corrosion resistance Copper pipe No corrosion or seizure 10
Heated at 0°C for 30 days Galvanized 1tI stainless steel pipe l Water absorption rate (%) 0.98 J'18 K 68
50 Slump None JIS A 5
758 Example 2 The tape of Example 1 was wrapped around the joint of a new duct of a gas range, and the range was used for 6 months to observe any changes. The tape remained airtight for 6 months, with no leakage of water or smoke due to condensation, no changes such as discoloration or hardening slump, and no seizure of the duct. In addition, the 9 parts of the duct wrapped with tape were completely airtight and were not oxidized, maintaining the metallic luster of the new duct and exhibiting good corrosion resistance.

Example 3 This tape was tested for flammability according to the JIS A 1522 A method. The results were a charring length of 7.50 IL, an afterflame time of 0 seconds, a residual flame time of 0 seconds, and a flame retardant evaluation of grade 2.

41 applicants: Furuto Kogyo Co., Ltd.

Claims (1)

[Claims] It is characterized by making it flame retardant and self-bonding by adding an organic compound, antimony oxide, a large amount of aluminum hydroxide, and a softener to a rubber that is mainly composed of polyisobutylene or butyl rubber or a mixture thereof. A self-bonding flame retardant compound.